How much hp can a stock 4l80e handle

I did the calculations and came up with 30.8 lb/min of airflow at a pressure ratio of 1.76 at 7200 RPM. This is between the 72% and 74% efficiency lines on the right side of the compressor map for the turbo. At 5250 RPM the airflow is 22.5 lb/min at 1.76. This point is on the inner-most 80+% efficiency island.

2510 posts · Joined 2004. #2 · Apr 13, 2009. Well...It depends on the block. If a competent machinist does a full inspection and finds minimal core shift and no casting flaws, and then the appropriate upgrades are accomplished (billet four-bolt mains, etc.) then the block could survive making 1,300 hp for short periods (like quarter-mile ...The hp on any block depends on many factors. The most obvious of course is how the block is casted which the 351C has an advantage in that area over any other ford small block. One block could crack at 500 hp while the other holds fine at 700+. It depends on how the motor makes its power, what parts were used, how well it was built, how well it ...6167 posts · Joined 2010. #4 · Jul 11, 2011. I doubt the stock internals can hold 600 whp. Your looking at ~400 ft/lbs of torque max. RIP Michael Lomker (mlomker) Team CCEvo . www.ccevo.com . Official Sponsor: . www.sspperformance.com .This is done with a diff ratio of 3.29 and a sprocket ratio of .89 (33 teeth/37 teeth). 3.29 or 3.69 gearing is accomplished by leaving the diff alone and changing the sprocket ratio to 1.00 (35/35) and 1.12 (37/35) respectively. Most people change their gearing at the same time they upgrade the chain.How much does it cost to rebuild a 4L80E transmission? A local transmission shop will rebuild a 4L60E for around $900 to $1,200 and a 4L80E for $1,300 to $1,800, with used units going for about $400 and $600 to $1,000, respectively.

EDIT: GM/OEM will work, but it is not advisable in a high-hp/tq application.. Rules state any vehicle running faster than a 11.99 in the 1/4-mile, flexplate needs to be SFI certified.. ... Most converter builders can create a 4L80E converter with a front cover compatible with the stock 4L70E flexplate or a performance version of the stock plate ...The GM 4L80E Performance Transmission Level 4 is powered with whopping 800 Horse Power. This automatic transmission gear can also generate up to 700 ft. lbs. of torque at a stall level of 2800 to 3400 rpm. This automatic transmission for sale is compatible with custom built and custom stalled 10” Lock-Up Billet Racing converters.Max HP with stock tranny and gears. The Turbo Forums - The discussion board for both hard core and beginner turbocharged vehicle enthusiasts. This is because clutch slippage in itself is the greatest generator of heat. How much horsepower can a stock 4l60e handlers; How much horsepower can a stock 4l60e handle; How much hp can a stock 4l60e handleIt depends on how high you want to rev. Reciprocating acceleration forces change a little with stroking a quarter inch (or 3/8) or so, but increase the RPM from 6,000 to 7,000, or 7,500 and very serious changes in stresses due to acceleration will occur. Pat. From sunny California. Still working on the '37.With a stage 4 clutch. Im not saying they arent great trannys, but i have a stage 5 competition 4 puck clutch, only making 235whp, 190 torque and i threw a rod inside my tranny straight threw it.. nice 2 inch whole threw the bell housing and out the other side. Great times. Make sure if you use the Z6 trans, get LSD, and a quaife and have a ...Generally speaking, the 4L80E will be able to live well with up to 450 flywheel horsepower and torque without any modifications; however, when exceeding this point additional hydraulic improvements will likely be necessary in order to ensure longevity.How Much HP Can A 6L90 Handle? ... a TransGo 4L80E shift kit, a high-performance input and output thrust bearing, high-performance shift solenoids, a 6L80E flex plate, a HD 6L80E torque converter, and a 6L80E shift lever. ... The 6L80E is able to handle up to 650 horsepower and 600 lb-ft of torque on stock parts. However, it can handle …

How much hp can a 2017 Mustang GT stock engine can handle? Thread starter SSG 5.0; ... How much hp can a 2017 Mustang GT stock engine can handle?-all of it . Last edited: May 22, 2019. Reactions: zero_chance, jhatley7, ckendri and 4 others. OP . OP. SSG 5.0 Well-Known Member. Joined Mar 11, 2019the completely stock 2.0, from what ive read, can handle an average of 10psi daily. anything higher, you'll need to do some internal work. im going to be running a 8 to 9 psi setup this summer for a daily driver. with a new clutch, the car will be very reliable, faster than a vr, and still get better mileage.Is It Possible to Push a Stock 4L60E to Handle 600 Horsepower? The 4L60E can physically hold 600 hp for short bursts in ideal conditions. But reliability risks rise exponentially. Attempting 600 hp in stock form requires: Very light vehicle weightThe 330 uses a lot of forged internals so it's pretty stout. Your biggest limitation with stock pistons and any kind of FI is going to be due to the compression ratio, which will limit the amount of boost you can add without major detonation issues. That said, about 400 crank hp on stock internals isn't a problem.GeneralTJI. Not a huge deal, but EFI isn't a "chip" btw. As posted above, your tranny will fail long before the motor. To answer your question, ~650 real HP to the wheels is where thing's start to get scary on a stock motor. There are those who have gone beyond... a lot depends on the turbo setup and tuning.

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In short, Performance Automatic yields a 4L80E engineered to handle 700+ horsepower and comparable torque. See All 29 Photos. 1. The Performance Automatic 4L80E is a …From what I see with guys pushing stock blocks with power adders is that the amount of cylinder wall thrust over duration of time also plays a big role in relative block life as well. So, in that respect an engine that makes 600 ft/lbs at 3,500 rpm is much less abusive than an engine that sees 470 lb/ft at 7,000 rpm.68chevelle533. 458 posts · Joined 2003. #10 · Aug 4, 2009. I had one built to stock specs by a local racer, who builds transmissions for the citys police cars. He claims alot of it is in getting the tolerences right. Mine went 11.80s behind a 400sbc that made 500 ft-lb and is still going strong after for 6 years of crusing. Mike.A 5.4 Triton engine can handle up to 300 horsepower. This V8 engine is a member of Ford's Modular family and was first produced in 1997. It is one of the most successful engines ever made, and it has been used in many of Ford's most popular vehicles. The Triton engine is considered to be very reliable and durable, with many of them still ...The answer depends on a variety of factors, including the type of engine (stock or modified), the quality of the components, and the way the engine is being used (for example, racing or everyday driving). Generally speaking, a stock 350 small block engine can handle between 200 and 300 horsepower. However, if the engine has been modified, it ...

The Bottom Line. The 4L60E vs 4L80E performance transmission differences are numerous. And these differences show that the 4L80E is the better transmission of the duo. However, it'll cost you more to acquire this unit compared to the 4L60E and the latter is also easier to find. How much HP will a stock 4L80E hold? How much power can the 4L80E ...Mar 24, 2011 · 6826 posts · Joined 2012. #29 · Nov 25, 2019 (Edited) RocketRobin said: The stock clutch can handle about 360 lbs torque. I swapped mine out for an ACT HD clutch that can handle 522 lbs. Pedal pressure and modulation is ok for city driving, but it's not the nicest. This clutch takes a while to break in. Here's a few that I found.. If you know of others or have one, post up your results, issues, etc.. 1) Lakewood RM-991 // SFI Certified. 2) J.W. Performance 93019LSD // SFI Certified. 3) TCI-399754 (80e specific) // SFI Certified // This flexplate was used for LC32's conversion, mockup, and testing.. "The only thing we added was the ARP ...The bottom end alone is several grand in parts. 300WHP can be made with the torque that ALH's are already putting down. 400ft-lbs @ 4000 rpm your at 300WHP so it's not that you need to make more torque you just need enough fuel and air to hold it into the upper range.The 4L80E needs very little to handle 600-700 HP. A 34 element sprag (stock on later models) and some hydraulic modifications, heavier intermediate snap ring, assembly tricks is about all it needs. All the same mods you do to the TH400, you do to the 4L80E. It can also be setup for full manual operation, no controller required.The most exteme case I know of is a twin blower front enigne dragster. It is a 406 stock block with a cast crank. In excess of 400 passes. 1200HP. You can push a stock block to around 600HP. After that aftermarket caps are needed to keep the caps from moving. Anything over 700HP you are really pushing the limits. . .but there are exceptions. ChrisThere are guys running C4's behind built 351C's at the strip but they are highly modified. A stocker IMHO will take a 400 HP street blast every once in a while without grenading. The same trans might not last a day at the strip making run after run. With a good shift kit and an external trans cooler the same trans would likely last a long time.May 7, 2022 · Reads 148. A stock 4l60e can handle up to about 600 horsepower. However, there are many aftermarket options that can greatly increase this number. For example, there are upgraded input shafts and output shafts that can handle up to 1,000 horsepower. There are also transmissions that have been built specifically for drag racing that can handle ... 4165 posts · Joined 2007. #2 · Apr 5, 2010. My TH350 is what I would consider a stock rebuild, just a B&M rebuild kit and no special parts, it has handled about 8 years of abuse, mostly 11 sec passes, a few nitrous passes in the 10's, and now the motor only has been in the 10's. I call that the limit for mine because I have to drive it back ...how much horse power can a stock Automatic transmission take for a 2006 GT . 1966 to a 2006 40 years later it only gets better with age. Save Share. Like. Sort by Oldest first ... just depends entirely on the transmission. the tci i got is guarunteed to handle <=850 hp at the flywheel. ...

Apr 11, 2009 · A well built 4l60e can handle some serious power. We have cars running 500-600 and 700 rwhp as the power increases of course the odds of failure do increase but we have had very good results. Generally a stock rebuild is not adequate for much more than general bolt ons however. Like. N.

The heat will kill a tranny fast. You could run the stock tranny on 600rwhp if you make a few passes but a 400rwhp bolt on jeep will kill it with back to back passes. -CHRIS-. 06' Jeep SRT8- Inferno Red- Stage 6 Single Turbo stock block build 710/664 at 10psi.218 posts · Joined 2009. #1 · Feb 6, 2015. So I'm on a budget this year and looking to get my regal back on the road so need help on coming up with a good budget build. Car is a 86 regal , 8.50 cert , big 10 bolt 4.10 gears and th400. Thinking about goin lq9 6.0 stock bottom end, now my question is what should I go with for heads and cam ?The stock 5.7L Hemi engine in a Dodge Challenger or Charger can handle up to about 9 psi of boost, according to most tuners. This surge normally delivers roughly 550 horsepower and 500 pound …How much horsepower can a stock 700R4 handle? A stock 700R4 can handle moderate horsepower levels, typically up to 300-350 horsepower, making it suitable for various street and light-performance applications. ... JEGS 60325 - GM 4L80E Performance Transmission for 1991-1996 Chevrolet 2WD Trucks (1) $2,545.99. JEGS 60436 - XHD Torque Converter ...The rear in my car is out of another members who just upgraded to a Dana 44 he has run a best of 10.88 with it on nitrous and 11.67 N/A. I can give you more info on the rear end when I get home I would have to see the paperwork on it to tell you what all has been done to it. Sampson 9/22/97-1/1/05. Like.With JET Performance upgrades, the 4L60E is good for about as much as 500 hp, and the 4L80E is good for about as much as 800 hp. JET also carries a stand-alone computer to control the tranny, in ...How much HP does a stock 4l80e hold? I have a 540 in a chevelle with a manual valve body th400 and I love untill I get on the highway and them I'm in pain! Found one at a truck yard for $500.00 looks like a deal. But I have some questions. 1. How much HP can it handle stock. 2. Will my flyweel work. 3.

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Not too many people are breaking built 4R70Ws. Mine really isn't a stock V6 tranny - it was built to Jerry W. spec by a shop he uses. But the '99 and up V6 4R70Ws are not too far behind in their ability to take power. 95 Lightning - Slow. 95 Convertible 357 turbo. 10.5/135 @ 3800#. SCT Tuned.The 4L80E is it's direct descendant. Stock 4L80E's benefit from 40+ extra years of research and development. They also benefit from not being so old. There are very few clean Th400 transmissions that have never been rebuilt. Whereas there are great 4L80E's are readily available at the local wrecking yard or on Craigslist.Performance Pack HP-4L80E-01. Required. Recommended. 4L80-E, TH400 Adjustable Rear Servo Pin Kit 34912-01K. Fits all TH400 & '95-earlier 4L80-E. Required. Recommended. 4L80-E, 4L85-E Heavy Duty Intermediate Clutch Backing Plate 34144HD-02.275" Thick. Required. Recommended. 4L80-E, TH400Boosted4.3. you'll be surpised at how much a 4.3 can handle. it can handle 650hp as long as you know what you're doing, and don't be cheap about it. get only the best if you can. I got 99 problems, but a Ford Lightning ain't one.1603 posts · Joined 2011. #2 · Jan 31, 2013. Stock will hold 100000 HP! But really our TC went out at 57,000 with all deletes H&S MM and a lot of towing. Check out REVMAX, great products/prices. 2015 Laramie Longhorn Mega - 22x12 AF Independents - Zone 2.5" level - Fox 2.0s - Stock tuning :thumbsdown: Share.With these modifications, a 6L80E can handle 500 to 600 rear-wheel horsepower in the typical street/strip application, although we have had customers push them all to the way to 1,000 hp." How much HP can a stock 4L80E take? How much power can the 4L80E handle? A totally stock unit or rebuild will typically live well with up to 450 flywheel ... This article will provide an overview of the 6L80E and its power handling capabilities, as well as a step-by-step guide to installing it in a variety of vehicles. The 6L80E can handle up to 685 horsepower and 600 lb-ft of torque. Install the 6L80E transmission to the engine. Secure the bellhousing to the transmission and torque the bolts to the ... 86 posts · Joined 2008. #2 · May 6, 2008. The pre-1982 blocks will supposedly handle up to 750hp at the crankshaft, but I'd use a steel billet main stud girdle, as I did on my own 302. The blocks produced in 1982 and newer are about 40 lbs lighter to help the Fox body cars handle better, and much of the weight savings came from reducing the ...Never had it on a dyno but the race weight with driver is 4500 lbs. Traps 118 MPH in the 1/8th and 148 MPH in the 1/4. Using a stock 4L80E with no transbrake. ….

It is capable of handling up to 700 ft-lbs of torque and can be used with engines that produce up to 500 hp. The 4R70W is also capable of handling rear-wheel drive and four-wheel drive applications. The 4R70W has a maximum power rating of 700 ft-lbs. This means that it can handle engines that produce up to 500 hp.Hey Nova, I have many 1/4 mile runs. I launch by bringing up the RPMS enough so the car wants to move ( take out the slack), then WOT. My 60s are 1.614-1.650ish on DRs and 1.594 on slicks. PERFORMANCE 4L80E… supports up to 1000HP. Our PERFORMANCE 4L80E series is ideal for street/strip driving and upgrades from a 4L60E/4L65E platform. It's rated at 1000 RWHP.... Price : $ 5,200.00 Add to cart Theoretically the A8 is rated at over 700 lb-ft (HP is calculated, Torque is what the parts are rated for) but the Z06 has different internals and additional cooling so I doubt the A8 version delivered on the Stingray can withstand as much. Last edited by mjw930; 11-10-2014 at 10:48 AM. Reply Like.Although some LS1s can make and live at 600+ rwhp, as an owner of a speedshop, it would be irresponsible of me to recommend making that type of power on a stock bottom end. 2008 G8 GT 11.7 @ 121 MPH Turbo 500 RWHP. 2006 GTO Cam+Bolt-ons 430 RWHP + N20 580 RWHP. 2004 GTO 10.6 @ 130 MPH Twin Turbo 950 RWHP.but i did find a good combination for $10,500. Should get me a safe 700-800HP crank: Crate Engine: LSX376 by GMPerformanceparts.com website , 9:1 compression ratio, forged, 450HP before boost $5000. Supercharger: A&A 1997-2004 Corvette Vortech Supercharger Kit with fuel upgrades $5500.About 400-450 HP/TQ is the limit on the stock TH400. With ONE almost free modification and some minor valve body calibration changes, 800 HP on an otherwise stock TH400 is not a problem if it's assembled well (good endplay, etc), and the 34 element sprag is a wise addition above 450 HP or any drag usage. jakeshoe, Nov 5, 2008.I doubt anyone can really give you a definative answer on how much power the E40D will handle other than the factory rating. I believe it is 900ft lbs. But this is the torque that the tranny is rated to handle not your motor torque. The typical torque converter can multiply torque by up to 2.5 times when you hit the throttle so do the math. How much hp can a stock 4l80e handle, 2850 posts · Joined 2010. #3 · Apr 22, 2017. my stock trans with a shift kit held a little over 300whp with a 2600 stall converter for 2 years. when i did my rebuild i was making just a little over 400whp on a patc level4 kit. i did end up getting come codes and pressure issues with my pcm that limited me to pushing the trans to its full ..., Never had it on a dyno but the race weight with driver is 4500 lbs. Traps 118 MPH in the 1/8th and 148 MPH in the 1/4. Using a stock 4L80E with no transbrake., Forged motor. + 125 nitrous shot + ~88 whp from the hybrid motor brings this to sub 400whp. The big boost turbo kit is the biggest POS for the b48 platform. The factory b48 has been shown to take 31-32 psi all day with relative ease. well the bigboost tubo 600 says you can get over 500hp., A 6.0 LS engine is capable of handling up to about 550 horsepower without any modifications. However, it is important to note that this is only possible if the engine is in good condition and has all of its original parts. If any of the parts have been replaced or modified, then the engine may not be able to handle as much power., Do you know that the STOCK Mustang GT500 motor can handle a little over 1000HP!!!!! I've been following a build of a Mustang GT500, the first to break 11's, then 10's then 9's in the 1/4 mile! Well it recently broke into the 8's!!!!! We are talking about a stock bottom end GT500 motor making 1079 twin turbo'd hp., The stock bottom is supposed to be able to handle 8 lb of boost. That should be good for close to 100 HP. That should get ya close to 400 HP ... is about 1000 lbs lighter which means a lot less stress on the entire drive train, which can really help, however 400 hp is 400 hp, a lot of how it will live depends on how carful you are with it. …, 896 posts · Joined 2006. #6 · Apr 9, 2010. I run the cast 350 cranks and production rods with ARP bolts in the high 10s. at 124 mph in a 3200 lb. car on a regular basis. If you keep the RPM below., The 330 uses a lot of forged internals so it's pretty stout. Your biggest limitation with stock pistons and any kind of FI is going to be due to the compression ratio, which will limit the amount of boost you can add without major detonation issues. That said, about 400 crank hp on stock internals isn't a problem., Built at Willow Run Transmission in Ypsilanti, Michigan, the 4L80E was introduced in 1991 as a replacement and advancement of the TH400. The 4L80E was installed in a lot of different GM trucks and ..., Yes it was a 4l60E to 4L80E swap. Pretty awesome that you can do the segment swap yourself. Turnaround was only about 14 hours from HPTuners, but when that is the last thing that needs to be done it feels like 140 hours. 1968 Chevelle - 3795# with driver. 6.0 LSX with TSP 224R cam swap. S475 Turbo., Here we go. As far as the first questions as to how much boost can you safely push. Well there have been guys pushing 30+ psi on stock everything and ran for quite some time. There have also been guys that …, Aug 11, 2023 · How much horsepower can a fj60 handle?How much horsepower does a supercharger add? 6 essential things to know about horsepowerJust picked up a 4l80e. Cummins 6btTorque handle building power Horsepower koenigsegg one1Transmission 2wd 750hp ss 4l80. , How much boost or HP can a stock RB 26 block take with out much damage? I think it depends on engine to engine tbh. I've been at 500whp for over a year, and have had no issues. I think a good tune goes a long way, especially with these motors. You can not have an aggressive timing table, especially in the 3-4500 range when the turbo is coming on., I want that the TH350 shifts at 4000RPM, but because boost pressure is set on the vacuum modulator, the TH350 will shift at 5000-5500RPM. I now adjusted the kick down cable and placed a adjustable modulator and it shifts now at 4500RPM at 5.7 psi. When I set the turbo at 7 psi, shift point goes back higher., Aug 27, 2008 · Stock LMM can probably handle much more HP/TQ mods than the stock Allison tranny. Seems like the rule of thumb is 90-100 add'l hp at the flywheel over stock before your odds of damaging things starts to go up. 2006 Chevy 2500HD LT3 CC SWB LLY 4x4. Line-X'd bed, wheel-to-wheel stainless nerf bars, 16x8 Ultra Peacemaker rims, LT26575R16 Firestone ... , If your HP laptop is not working or is malfunctioning and you have done everything you can do to fix the problem yourself, you will need to have the laptop repaired by a profession..., At 600 whp they seem to last about 100 passes. At less than 400whp, the gears should last almost indefinitely, barring other problems. At 800whp, it's probably in the area of 10 passes. Horsepower in fine for talking about gear life. Any horsepower level is going to have a fairly narrow range of torque it will produce., How much HP will a stock 4L80E handle? 700+ horsepower In short, Performance Automatic yields a 4L80E engineered to handle 700+ horsepower and comparable torque. What year 4L80 are the same? 4L80E production started in 1991 and continues today. 1991-1996 cores are essentially the same and interchangeable with some minor updates and differences., The torque converter on this automatic transmission is a fluid turbine drive, much like those found on its predecessors, e.g., the 700R4, 4L60, TH350C. The 4L80E also comes with a lock-up pressure plate for direct, mechanically-coupled driving from the engine crank. It is 26¼ inches long and boasts a 310mm torque converter., The answer was something like 500 hp. If we apply that formula it allows you to increase 8 x 20 = 160. 160 + 350 = 510 hp. That means that to the wheels you are talking about 450 rwhp. One thing is to ask how much hp a LS1 can take and another is to ask how much HP can you run an LS1 within safe parameters., It scares me to think that the e16g kit could fatigue the stock crank that badly at those power levels in a couple of years. What I REALLY want to know is how many folks have roadcoursed their cars (and the duration in hours/miles) at the 500awhp level without requiring an engine rebuild shortly thereafter. Max, Shawn F. 571 posts · Joined 2008. #24 · Sep 9, 2009. Your answer has pretty much been answered. If you run 350 to 400 HP on a stop 10 bolt and it's for the street then your fine. Street tires, stock type stall, and street driving will be fine. It's the shock to the rear ends that hurt them., My T5 has lasted very reliably behind about 480 ftlb flywheel torque (412 at wheels) with much full throttle use at the strip. Having said that though some people seem to be very 'hard' on transmissions and can spit a T5 all over the ground behind a stock 302. If you think you're in that catagory then don't use the T5., The stock internals can handle in the ballpark of 400hp at the crank. The hard part is getting there and being able to put it to the ground. ... (250+) hp range is at best difficult. You can start with the following mods first which are described in detail at Z31.com: better cat back exhaust 240sx throttle body (SOHC, w/ cruise) headers cams ..., You can think of this trans as basically a TH400 with a 25 percent overdrive tacked on. The 4L80E transmission was mostly used in 34- and 1-ton trucks and larger SUV applications beginning in 1991., As far as the fluid, the owner wanted less slip and a firmer, quicker lock-up, hence the DexVI/F fluid mix. The fluid viscosity@100C is 5.0cSt with a boost of a muilti-functional phosphate ester for extra AW. The modified LH6 was dynoed at 575 Hp and originally came from a 2008 TrailBlazer. Last edited: Aug 16, 2016., The zf 8 speed from the srt is only rated to handle around 550-600hp. That is one thing people take note of. Your axles would probably need replacing depending on how nuts you go. Also, rear upper control arms since the factory ones are the shitty ones used in V6 models. Like., For the "price" it's fantastic, and is reported to be able to handle up to 500 rwhp - which I'm hoping to be at by next spring. 2006 GTO Phantom Black - M6 - sold. GMM Ripshift, LS7 clutch - Pedders Street II. AEM CAI, Coated Dynatech LT's, PowerCat high flows, Magnaflow cat-back w/ e-cutouts., Additionally, we increase volume and pressure to the stock 4th gear servo. Now we move on to the pump. ... These transmissions are tough and built to handle whatever you dish out. ... rated at 700 RWHP... $ 3,500.00 Add to cart. 9.5-inch SRLS Billet. This is a billet backed converter intended for high horsepower applications with higher stall ..., C7 Tech/Performance - How much WHP can a stock internal C7 LT1 handle? - I have a 2014 C7 Z51 with a stage 3 texas speed cam, a&a blower, 2 inch texas speed headers. ... Remember E85 requires more fuel for the same HP levels. If he tried E85 with stock LT1 injectors at 665 RWHP he would nuke the motor. Reply Like 11-08-2018, 08:48 AM ..., 62nalide. I pushed on up to 600-817rwhp for a year (6L80E) on a heavy truck, some make 650rwhp and hold for a lot time. The 6L80E has been out for years and its all in the tuning. I've heard of people break them at 500hp or so but as long as you have a bigger trans cooler and watch your temps it'll last a long time., Personally I am a 1j guy. My rule of thumb is if it's under 600rwhp and daily driven 1j. Over 600rwhp and not daily driven 2j. Which ever one you choose, daily drive ability goes out the window somewhere between 550 and 630 depending on your set up. For instance clutch, rear-end, tire to support the power, not mention fuel, in which case you'll ..., With a set of 225/78 Kelly touring tires on the street, Your shaft can handle 2000HP. (It will never hook). At a well preped track, With slicks and a trans brake leaving at 4000rpm, 300HP may snap it.. The other factor you need to consider is the rotational limits.