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GT40 Heads and DYNO SHEETS

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Old 03-12-2007, 10:28 PM
  #21  
AdderMk2
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Default RE: GT40 Heads and DYNO SHEETS

ORIGINAL: wythors

Adder, are you always such a dick?

The accepted ratios for powertrain loss that I have always heard of and used are 25% for an automatic and 15% for a manual. Using those numbers, my 257 translates to 342 crank horsepower. Coincidentally, that's within two horsepower of the FRPP crate motor that uses the parts I have on mine, so I'm pretty confident that my hp number is good. Now, if you remember your4th grade arithmetic, take 15% off of 342 and what do you get? 291.266666666.

Any questions?
actually, its 12-15 for a manual and 18-20 for an AOD
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Old 03-12-2007, 10:32 PM
  #22  
ih8chevy
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Default RE: GT40 Heads and DYNO SHEETS

let me kno about that mega squirt please

thanks
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Old 03-12-2007, 10:53 PM
  #23  
AdderMk2
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Default RE: GT40 Heads and DYNO SHEETS

ORIGINAL: ih8chevy

let me kno about that mega squirt please

thanks
how the hell am i supposed to talk to you about the squirt, when your AOL info ISNT in your profile???? im not gonna chase you.


btw, im going to bed
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Old 03-12-2007, 11:12 PM
  #24  
92hatchLX
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Default RE: GT40 Heads and DYNO SHEETS

I can't remember what the tool's name was, but I think that he hadthe FRPP GT-40 (or whatever it's called) crate motor and was only pumping out like 250 rwhp (untuned mind you) through a T-5. The difference in horsepower (on your combo) isn't worth 40 horsepower between the AOD and T-5 unless you've got a slipping tranny and a****ed up torque converter.
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Old 03-12-2007, 11:13 PM
  #25  
mustangfxbdy
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Default RE: GT40 Heads and DYNO SHEETS

if all he has is those mods.. I dont see no way hes got350rwhp at all no where close.... I had a friend one time that said he probably had 300rwhp in his 94 gt... all he had was underdrive pulleys, off road hpipe and flows... i just let him believe what he wanted.... never hurts anything...
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Old 03-12-2007, 11:49 PM
  #26  
SN95Stang
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Default RE: GT40 Heads and DYNO SHEETS

lol ppl always ask how much hp i hav and my response is 200 or so....they laugh and dont believe me. ppl dont understand that 5.0s did not hav much HP at all...
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Old 03-13-2007, 12:15 AM
  #27  
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Default RE: GT40 Heads and DYNO SHEETS

ORIGINAL: AdderMk2

ORIGINAL: wythors

Adder, are you always such a dick?

The accepted ratios for powertrain loss that I have always heard of and used are 25% for an automatic and 15% for a manual. Using those numbers, my 257 translates to 342 crank horsepower. Coincidentally, that's within two horsepower of the FRPP crate motor that uses the parts I have on mine, so I'm pretty confident that my hp number is good. Now, if you remember your4th grade arithmetic, take 15% off of 342 and what do you get? 291.266666666.

Any questions?
actually, its 12-15 for a manual and 18-20 for an AOD
The convertor has a huge role in this too. My hatch made 602rwhp through the AOD. Although I'd like to claim 800hp at the flywheel on 93 octane, I don't think that is the case. On the other hand, my coupe made 348rwhp N/A on a Dynojet through a C4. It has a much looser stall. With a 150 shot, the car goes 9s. I think the dyno sheet was sand bagging a little bit on the coupe.The ET Calculators say it was making ~450rwhp N/A. That's 100rwhp difference from the track to the dyno. That's also why we don't race dynos.

Even with 18% loss on the hatch, that's still 735hp on pump gas with 327", 13psi, Twisted Wedge heads and a Performer RPM intake. Not bad. Come to think of it... 428/567 with an 18% loss is 523hp 692tq on a stock shortblock, E7s and a 175 shot.
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Old 03-13-2007, 10:23 PM
  #28  
mustangfxbdy
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Default RE: GT40 Heads and DYNO SHEETS

ORIGINAL: SN95Stang

lol ppl always ask how much hp i hav and my response is 200 or so....they laugh and dont believe me. ppl dont understand that 5.0s did not hav much HP at all...
they had about 195 to 202 rwhp stock.. most stock see around 195 and theydid an article in 5.0 mustangs where they dynoed a completly bone stock and it pulled 202rwhp highest ive seen...on a bone stock 5.0 mustang... but they do respond well to modifications. h/c/i and complete exhaust including headers help it alot....ford could have put better stuff on stock like they do the new mustangs and we would have had alot more hp stock... but that was back when they had a big economy kick(camaros,mustang and most performance cars didnt have alot of hp stock like they do now)and now there trying to bring back big hp.... go figure... if they were to put the 302 back into the mustang now days i guarentee it would have alot more than 225hp... they would have better heads, cam ,intake manifolddesign and so on...

im not after a hp number im after track time..... i have a time set in mind i want my car to run and then i will say i have the car where i want it howevery much hp that takes is how much ill be happy with.... most here dont ask how much hp you have most always ask what does she run and thats all they care about if you have a 400rwhp car that doesnt do well on the track they could care less...
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Old 03-14-2007, 12:03 AM
  #29  
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Default RE: GT40 Heads and DYNO SHEETS

Boss 302.....i think it is coming next year...it is more hp...but not sure how much more
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Old 03-14-2007, 12:13 AM
  #30  
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Default RE: GT40 Heads and DYNO SHEETS

We dynoed a dudes 92 gt with a stick in my hot rod class at school once. On the dynojet dyno it made 280 horse and 320 torque at 5500 rpm or so. He had a fresh short block, the gt40x heads (which are the gt40's cast in aluminum right?), an f cam, and a cai. The 5 speed was also new. This car was beautiful by the way, i wish i had a picture of it. All this was with the stock tune as well. Oh he had long tubes and an x pipe too.
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