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Nov 25, 2022 | 10:59 AM

#21

HOXXOH

Race Director

Joined: Sep 2007

Posts: 16,557

Likes: 2,104

From: Peoria/Phoenix AZ

C6 of Year Finalist (performance mods) 2019

Quote:

Originally Posted by jonjoy

LS2 1 3/4. LS3 1 7/8 LS7. 2.00 that has been the proven combos for years

While I agree from a sales point of view, but certainly not when you're looking for maximum power from a basic bolt-on engine. Once you understand the basic concepts of gaseous thermal dynamics, it'll be much more clear. There's about 10 horsepower hiding in the 5000-6800 RPM range related to exhaust sizing and shape, if you know where to look. You don't need a supercomputer to do the math, when you can find the answer with a kid's crayon.

Nov 25, 2022 | 11:02 AM

#22

tektrans

Drifting

Joined: Apr 2005

Posts: 1,910

Likes: 449

From: Central NJ

Quote:

Originally Posted by jonjoy

LS2 1 3/4. LS3 1 7/8 LS7. 2.00 that has been the proven combos for years

IDK about that for stock or close to stock combo's.
I ran mid 9's N/A with a 13:1 441 LS7 and I used 1 7/8 primaries.
1 7/8" for a stock LS3? 2" for an LS7? I just don't see it but that's imo.

Nov 25, 2022 | 01:55 PM

#23

TCW

Le Mans Master

Joined: Jan 2001

Posts: 6,435

Likes: 365

From: Maryville TN

St. Jude Donor '06-13,'16-'17, '19

Quote:

Originally Posted by HOXXOH

BTW, I'm not fond of the slip joint/clamp pipe connections, so I drill a hole and insert a short sheet metal screw at the overlap to ensure it stays together

Neither am I. But, just for info, after 40,000 plus miles, my LGs haven't moved any. (knock on wood)