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post #1 of 16 Old 03-24-2008, 10:58 PM Thread Starter
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500rwhp

Hello Im new to the 5.0 pushrod group and wondered what it would take to get 500rwhp/500tq on pump gas (93). I want to do a single or twin setup, with a 331 motor and a trick flow intake. What heads would you recommend? afr 165,185? or trick flow twisted heads? Am i crazy for trying to get here with a stock block? On my twin turbo 01 corbra 5lbs of boost gets me 550, is it hard to make good number with a 5.0?

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post #2 of 16 Old 03-24-2008, 11:41 PM
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You can make 500rwhp with a stock stroke 5.0 with AFR 185 heads
good cam and about 12psi. Seen couple of guys brush 600rwhp with 15-16psi.

500rwhp is definitely the upper end of keeping a stock 302 block in one piece.
351W would handle it better and bolts right in.


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post #3 of 16 Old 03-25-2008, 08:38 AM
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Originally Posted by got9lbs View Post
Hello Im new to the 5.0 pushrod group and wondered what it would take to get 500rwhp/500tq on pump gas (93). I want to do a single or twin setup, with a 331 motor and a trick flow intake. What heads would you recommend? afr 165,185? or trick flow twisted heads? Am i crazy for trying to get here with a stock block? On my twin turbo 01 corbra 5lbs of boost gets me 550, is it hard to make good number with a 5.0?
Not attempting to start a flame war, but 5psi on a 01 cobra yielding 550rwhp is simply not going to happen. I know of a few guys running their twin cobra setups (99-01) that are pushing 12psi that are barely pushing those numbers. Achieving a 100% gain in h/p with only 5psi of boost is not happening (unless you had some other serious mods and/or nitrous).

With that said, r.barn is right on the money….although it may not take quite 12psi, every combo (and dyno) is different.

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1989 Mustang Notch - Twin Turbo - 500RWHP, 1996 Mustang Cobra, 1994 Mustang GT Vert - 408w
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post #4 of 16 Old 03-25-2008, 09:58 AM
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just like they said !!

I would use the stock bottom end. dont spend $$ on a 331 if your putting it in a stock block 500rwhp car lol. the stock bottom end will out live the block. good tune provided of course.

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post #5 of 16 Old 03-25-2008, 10:35 AM
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edelbrock perf intake, afr165 heads, 1.7 rockers, stock cam, stock block, stock crank & rods, stock pistons. 12psi on 93 oct mine dynoed 500hp/527tq. it ran [email protected] on 17" nittos and [email protected] on slicks. 3550 lbs.
edit- that was with my 94 gt incon car.

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post #6 of 16 Old 03-25-2008, 10:41 AM
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edelbrock perf intake, afr165 heads, 1.7 rockers, stock cam, stock block, stock crank & rods, stock pistons. 12psi on 93 oct mine dynoed 500hp/527tq. it ran [email protected] on 17" nittos and [email protected] on slicks. 3550 lbs.
edit- that was with my 94 gt incon car.
I take it that was with an auto….as there is no way in hell I'm running low 11's with my current bald nitto dr's!!!! I can't wait until I pick up some sticky et radials or bfg dr's!!!!!!
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post #7 of 16 Old 03-25-2008, 11:30 AM
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tremec 3550. 1.72 60' on nittos.

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700hp/643tq [email protected]
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post #8 of 16 Old 03-25-2008, 11:50 AM
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tremec 3550. 1.72 60' on nittos.
How....in THE HELL....are you hooking with nittos!?! Mine must me seriously past their useful life for dragstrip duty (completely bald)…because they won't hook for anything (and I consider myself a pretty damn good driver).
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post #9 of 16 Old 03-25-2008, 12:00 PM
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the nittos were 275/40-17's on stock 8" tribars, and i always ran 20psi (street and track). stock front susp (minus swaybar) and upr adj uppers & lowers in the back with stock shocks. i had a 2-step set at 2k, so the turbos were just starting to spool and slipped the clutch a little to launch. i would pull the front left tire on the 1-2 shift.

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post #10 of 16 Old 03-25-2008, 12:11 PM
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the nittos were 275/40-17's on stock 8" tribars, and i always ran 20psi (street and track). stock front susp (minus swaybar) and upr adj uppers & lowers in the back with stock shocks. i had a 2-step set at 2k, so the turbos were just starting to spool and slipped the clutch a little to launch. i would pull the front left tire on the 1-2 shift.
I'm thinking the 2-step set at 2k has a LOT to do with it! Perhaps I should do the $1 2-step add on to my megasquirt and test it out for myself!

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post #11 of 16 Old 03-25-2008, 08:19 PM
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I made my numbers with stock Cobra intake, stock GT40 iron heads, 10-12psi DSS 331 pump gas 42# injectors, timing locked out @ 20 degrees, stock A9L computer-no chip, 38#'s fuel pressure. HP Turbo T60 street kit. Driven over 20K miles. I can't wait to get to the dyno with the Trick flow heads and lower intake and Hogan upper.

1993 Notchback --- HPT60 Street Turbo Kit---512rwhp/622 [email protected]
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post #12 of 16 Old 03-25-2008, 09:33 PM Thread Starter
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trbofox- what dss 331 is that the super pro bullet sb? I assume that is just a stock block with a main support?
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post #13 of 16 Old 03-25-2008, 10:07 PM Thread Starter
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I stand corrected it was 490/467 at 6psi. billet 302 stroker, stage III heads, sc cams.
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post #14 of 16 Old 03-26-2008, 07:12 AM
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I stand corrected it was 490/467 at 6psi. billet 302 stroker, stage III heads, sc cams.
Now that sounds far more reasonable.

FYI, check my sig for my current combo. I'm producing nearly 500rwhp…although I do have mismatched exhaust turbines for my cam. Once I bump them up to the larger .63 units I would expect to pick up a few horsepower and have a torque/hp curve that is more applicable to my combo.

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1989 Mustang Notch - Twin Turbo - 500RWHP, 1996 Mustang Cobra, 1994 Mustang GT Vert - 408w
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post #15 of 16 Old 03-26-2008, 10:14 PM Thread Starter
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millhouse is that the stock bottom end? and what mm turbos? What did you use for headers?
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post #16 of 16 Old 03-27-2008, 07:18 AM
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millhouse is that the stock bottom end? and what mm turbos? What did you use for headers?
It's a stock rebuilt bottom end with some quality moly rings. The turbo's are Garrett .60/.48 off of mid 80's turbocoupes. The headers I purchased from B&G.
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