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Re: TPI vs. LT1 or miniram dyno curve?

Subject: Re: TPI vs. LT1 or miniram dyno curve?
by BeachBum on 2009/1/9 22:18:39

Quote:

CentralCoaster wrote:
Quote:

BeachBum wrote:

The long tube TPI is superior in off-idle torque than the LT-1..... it'll make literally 40 more ftlbs down at 2500-3000 rpm...... but it sacrifices to much rpm to do it..... hence the LT-1 is drastically superior to the TPI long tube runner set-ups in my opinion.

I don't really care about the superram.

The reason I ask is I see stock LT1s constantly putting down 300 ftlbs of torque at 2000 rpm, and is flat as a pancake too.

So I'm wondering how the TPI can possibly beat that.

92 LT1 with no mufflers and SLP chip:

http://www.lt1.net/images/vette/c4dyno.jpg

95 LT1 Firebird with catback (see lowest line):

http://www.lt1.net/images/dyno.jpg

95 LT1 with long tubes and chip:

http://www.dragtimes.com/images_dyno/ ... evrolet-Corvette-Dyno.jpg

I don't think this is exactly what you're looking for, but its the best I can help you. It does kind of give a good idea of what the two torque curves look like like considering the LT-1 produces a torque curve similar to the Miniram intake, with that, these two superimposed dyno graphs show the difference in torque between the two styles. The motor is a 383 with somewhere around a 236/242 cam. These were both done on the same motor & dyno.

[IMG]http://i526.photobucket.com/albums/cc342/tldrane/TPIvsMR.jpg[/IMG]

TH350