I was flipping through a MM&FF mag today and, lo and behold, there's your name in an article about a Mustang. They kept on bragging about how the Mustang made over 1000 rwhp as compared to only 850 rwhp on an LT1. You should be ashamed. . .

Seriously, though, congrats on the magazine car.

Why DO you think the Mustang made an extra 150 hp over the LT1? Same tranny, same size motor. I noticed the 'Stang had a single plane intake. Maybe that's where it gets the power???

Mike

 

Lol, thanks.

A few things. First off, mine is geared more towards low/mid range power while we specifically made everything on Dans car biased towards high rpm power.

Mine makes a few hundred more horsepower/torque up until around 5k rpm's where his starts to run away.

Headers- Mine has very short headers with tight radius bends (necessary for turbo placement). Dans headers have larger radius bends, that for the most part sweep forward directly into the turbos.

Housings- I'm using on center housings, Dans are tangential.

Intakes-Dan is using a single plane intake. (which we believe is a large factor in the difference in power curves).

Intercooling- I'm running small side mounted intercoolers and it sees 135 degree IAT's on the dyno. (didn't want to block cooling system airflow as I'm still running A/C). Dan is running a large front mount intercooler, IAT's are within 5 degrees of ambient on the dyno.

Exhaust- Dynoed mine through the SLP two on the left, Dans made the big # through open downpipes (though still is within 50hp through the mufflers).

RPM- Mine was peaking at around 6,000 and then valvefloat. Havn't re-dynoed since replacing the springs. We were pulling dans car to around 6,600 (where it made peak power).

So, basically, compromises were made to mine in order to keep the A/C, and no compromises were made to Dans system in terms of efficiency. Interesting to see how much small differences can add up.

 

Maybe the stang was running more boost? IIRC, Jim was peaking at 18-19psi to get 850rwhp. Seems to me like the mustang crowd in general have less reservations about running major boost than the GM crowd. Brent from turbomustangs made 1178rwhp with a little R-block 302 fox, T88 turbo, and running 30-32 psi... and the tach never went past 6200rpm . I'd love to see a 355 or 383 LT1 running that much boost . BigRick's 1240rwhp monster LT1 was running "only" 23-24psi. The import guys are nuts about it, hearing 30psi in those little motors is almost an everyday occurance, even with nitrous (yes i do lurk on "those" boards from time to time). American iron needs to step it up.

I haven't seen the article, but i'll stop by the store tomorrow and get one. And congrats to ya Jim for getting into the 'stang mag

edit- well ya beat me to it Jim... aren't you running in the 18psi range right now?

 

I run 20-22lbs of boost, as does Dans cobra. I think Dans #'s were actually at pound or two less boost than mine.

 

I just got a great deal on a Victor-EFI intake. It's already drilled for LT1 heads on one side only for use on the flow bench. It was used by Thunder Racing for flowbench R&D. It's surprising the difference over even a ported LT4 intake in just flow, let alone runner length improvement.

I'm thinking about getting everything I need to install it, then doing a before/after dyno test. Since there's no coolant or distributor in the intake, I should be able to swap it in an hour on the dyno.

Anybody want to help "sponsor" this test?

 

Sounds like an interesting test. Sponsor? Well, you can use our dyno, but it's a bit far from you