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Current (2015) known FWD dyno record? Searched..

How much FWHP is TOO much for a street driven 1g....


  • Total voters
    44

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Someone get FLF on billet bell housings and mid sections
That's not going to do anything but cost people money.

2 big failure points for AWD, FWD is the same only 4th gear drives it.
1. Intermediate shaft and CD Gear: This gear takes roughly 3 times the tooth bending stress as first, and 2 times as second, and it has a very similar tooth profile. This gear pair should have the same profile and width as the output ring an pinion.
This problem is exacerbated by 2 other design flaws.
a. The intermediate shaft is an idler, which means the teeth are reverse loaded. This kills the endurance strength by 75% or more.
b. 3rd gear is narrower than the intermeadiate shaft. This is a stress concentration and also hurts the life of the intermediate shaft.
2. 4th gear is way too narrow. If you look at any manual trans design papers it they suggest designing first and second to like 80% of yield strenth for your projected torque input, and like 50% for 3rd and 4th. Reason being your not in first and second long enoug to accumulate many load cycles. You spend most of the time in higher gears to they will fatigue more. If you reduce the stress it takes longer to fatigue them.

I'm sure there are some defficiencies in the case, with our tooth profile and pressure angle you are well into low cycle fatigue failure before you yield the cases.

Seperating the output from 3rd gear would make the biggest difference in the longetivity of a dsm trans.

An example if this. Look at the evo trans, thinner gears but they last much much longer before they strip them. Output is taken from the shaft, not 3rd gear.

Second example 3/s transmissions, the 3rd, I shaft, and CD has a much bigger profile and wider tooth. They don't break.

The play for FLF would be a bellhousing that puts 3s trans guts in a dsm. That would be the tits. $2000 I would buy that.
 
The fwd case has less gear support than the awd case. It doesn't have that sandwich piece the awd one has. The gear support is the mid section itself. Same as a honda trans.
 
Yeah, but the gear spreading load is probably orders of magnitude less than what the case can withstand. Plus the gears are right next to the case, unlike a honda that has 5th gear in there. The overall shaft length is much less so it takes more force to flex the shafts. That's essentually what the honda handcuff is doing, making the shaft shorter.


Some back of the napkin calculations. In first gear if you could hook 400ft*lbs, that would be 3500lbs of force seperating the intermediate and output shaft. Shittiest cast aluminum is ~15ksi yield strength. 3500/15,000 = .25 in^2 area to hold the gears together. That means that a .5" aluminum bar would hold the shafts together. I think the case has a bunch more area than that.
 
I did not make 1000 hp but I trapped 137 and ran tans and had air conditioning up until this year The compressor took a sh** and I got tired of trying to fix it all the time. It took a lot of work to get it to Idol with the quartermaster and Kellford cams with the air conditioner working

Tans? Spray on or natural? I prefer laying down on a deck chair on my balcony. ROFL

So it's not recommended to keep A/C huh...that sucks.
I also see so many deleting ABS, but couldn't find a good reason why.

Also, aren't all these dyno records recorded somewhere, and/or wouldn't the quickest/fastest FWD be crowned the king?
 
Tans? Spray on or natural? I prefer laying down on a deck chair on my balcony. ROFL

So it's not recommended to keep A/C huh...that sucks.
I also see so many deleting ABS, but couldn't find a good reason why.

Also, aren't all these dyno records recorded somewhere, and/or wouldn't the quickest/fastest FWD be crowned the king?
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Here's mine 801 I have a 809 somewhere
 
You people way over think this stuff. We use junk parts and have zero failures. We broke a toothoff of the differential last year. That is the only gear box failure we have had in long time. We stripped the teeth off of fifth gear twice at the salt flats with 800hp 600tq. Our cars make far more power than what you guys are even bench racing about and we do not have issues. Granted we race from a roll in land speed racing but, our cars are under much more power for far longer than anyone here runs their car.

KISS
Keep it simple stupid
 
Tans? Spray on or natural? I prefer laying down on a deck chair on my balcony. ROFL

So it's not recommended to keep A/C huh...that sucks.
I also see so many deleting ABS, but couldn't find a good reason why.

Also, aren't all these dyno records recorded somewhere, and/or wouldn't the quickest/fastest FWD be crowned the king?
People delete abs because it looks cleaner/weight reduction. Any accessory belts have a pracidic affect on power like the down side of a super charger, plus room reasons for large turbos most delete the AC and unneeded accessories
 
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You people way over think this stuff. We use junk parts and have zero failures. We broke a toothoff of the differential last year. That is the only gear box failure we have had in long time. We stripped the teeth off of fifth gear twice at the salt flats with 800hp 600tq. Our cars make far more power than what you guys are even bench racing about and we do not have issues. Granted we race from a roll in land speed racing but, our cars are under much more power for far longer than anyone here runs their car.

KISS
Keep it simple stupid

Thats kinda what I was thinking. Didnt wanna say anything but the failures posted above look more like driver abuse.

I do know that Ill be pushing the F5M trans pretty freaking hard. Im starting to stock pile extra stuff just in case I do destroy something. Got a score on two 90 trans and a 97 trans for $175. Couldnt pass that up.
 
We use 94 trannies. The older mitsu techs used to call them king Kong trannies. With that said, we have more racing miles in fwd Mitsubishi's than anyone around and just don't break stuff. The broken tooth I spoke of was on an open diff at 850hp and broke from tire shake. We have fixed it and if everyone looks at our half mile thread you will see a 7200rpm launch on an unprepped runway and that is with a 75mm turbo. Driver error causes 95% of drive train failures in dsms that I have seen first hand. You can't really prevent stripping a gear, everything else you sure can.
 
I made 68xwhp/57xtq when the car was a 5 speed. Bone stock 2g fwd trans with 220k miles on it. Never had an issue until I swapped to auto LOL. I went 10.9@140 with a crappy 60ft.

Now with the auto I went 9.6@144 and 9.7@146 making 620 through the auto.
 
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I made 68xwhp/57xtq when the car was a 5 speed. Bone stock 2g fwd trans with 220k miles on it. Never had an issue until I swapped to auto LOL. I went 10.9@140 with a crappy 60ft.

Now with the auto I went 9.6@144 and 9.7@146 making 620 through the auto.

Was you using a boost by gear and or a nlts when 5 speed? Would you stay in it if spinning in lower gears? I'm practicing right now and haven't decided my exact plan of attack.
 
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Was you using a boost by gear and or a nlts when 5 speed? Would you stay in it if spinning in lower gears? I'm practicing right now and haven't decided my exact plan of attack.

Yes I was using boost by gear and nlts. I would have to pedal a little in first no matter how much I turned the boost down. Some wheel spin isn't bad as long as the car is still moving.
 
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This thread has been cleaned up. Any further replies should pertain to the OP's original topic of FWD HP numbers. If you do not have any dyno numbers with proof of such numbers or relevant information that will aid in a useful conversation, do not post those replies in this thread.
 
I'll ask again, has anyone made more then Tim's 944FWHP. (with a dyno sheet or video as proof)? Thanks to BoostedBeaver for cleaning up the thread.
 
Tim's car is an awd, i know he put down the numbers both awd and fwd but if you're talking an actual fwd car then Kelton seems to be one of the highest around.
I just started getting active on this forum again recently but there used to be a dyno log showing every member's dyno numbers. Should still exist unless they removed it in the last year
 
Tim's car is an awd, i know he put down the numbers both awd and fwd but if you're talking an actual fwd car then Kelton seems to be one of the highest around.
I just started getting active on this forum again recently but there used to be a dyno log showing every member's dyno number
Tim's car is an awd, i know he put down the numbers both awd and fwd but if you're talking an actual fwd car then Kelton seems to be one of the highest around.
I just started getting active on this forum again recently but there used to be a dyno log showing every member's dyno numbers. Should still exist unless they removed it in the last year
Boosted I have been trying to get chris to get that dyno challenge page back for a while it was a signature feature that set dsmtuners apart from all the other forums, If that dyno page existed thread like these wouldn't exist because even in that challenge it put a true front wheel drive in a separate category from the awd because as you have stated they are indeed two totally different plateforms. My evidence is posted in post #89 and I have yet to see anyone post a higher number for the true fwd. Just my $.02! People can like keltalon or not , one thing for sure that fool is dsm til the day he dies that's for sure LOL! Stay tuned for some more update's from him real soon:argue:!
 
I already posted a higher dyno number than you kel talon. With video proof. 864.
 
I don't really see how it matters if Tim's car is AWD or not. Seeing as he dyno'd it with only the 2 front wheels spinning the dyno.. so 864 and/or 905fwhp is the record...
 
It's not like I'm going to have a different drivetrain loss or power numbers if I put a fwd transmission in the car and dynoed it fwd. Whatever, I really don't care.
 
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