LT's > Bullet Mufflers > Turndowns?
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01-12-2006, 08:27 AM
#10
Originally Posted by HowellSoccer88
why would hp decrease?
also,when the hot hot gas comes directly out of the header, its expanded... if you let it cool off just slightly with a longer pipe, the volume of it decreases..
so right off the header (im just making numbers up here) you're trying to shove 500cfm thru a muffler, but 3ft back, you're only trying to shove 350cfm thru. mufflers are a restriction. no matter how "free flowing" they are. so you'll see more loss with it on the header, then with it farther back.
PLUS, your muffler packing wont last very long being that close to the engine.
Originally Posted by BLK85
Back preasure probaly.
sometimes people confuse velocity or acoustic tuning with "creating backpressure" but they're just confused.. engines hate backpressure. period. all it does is induce pumping losses.
some people see things like engines making more power with smaller header primary tubes and they THINK its because of backpressure... when in reality, theres no backpressure increase, the engine just likes more exhaust gas velocity.. or some other effect..
even in cases of severe overlap where you would think backpressure would stop the intake charge from coming out, that's not what you want... what you want is to tune it so the "pulse echo" coming back up the tube keeps the charge in the chamber.. similar to intake runner length tuning... NO piston engine likes backpressure.. period.
01-12-2006, 08:56 AM
#11
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LT's into 3 1/2 inch merge collectors into 12 inch extensions into 3 1/2 ID Bullet mufflers
Sounds like the pavement is going to crack every time i start the car!
Sounds like the pavement is going to crack every time i start the car!
01-12-2006, 10:42 AM
#13
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Originally Posted by BBADWS6
LT's into 3 1/2 inch merge collectors into 12 inch extensions into 3 1/2 ID Bullet mufflers
Sounds like the pavement is going to crack every time i start the car!
Sounds like the pavement is going to crack every time i start the car!
01-12-2006, 11:08 PM
#16
here ya go. sounds BADASS! and i daily drive my car. BTW this set up gained 10 rwhp on my friends car over a VERY nice 3" x pipe set up. that and its 30lbs lighter!
https://ls1tech.com/forums/drag-racing-tech/417401-pics-my-bullets-long-tubes.html
https://ls1tech.com/forums/showp...929&postcount=3
https://ls1tech.com/forums/drag-racing-tech/417401-pics-my-bullets-long-tubes.html
https://ls1tech.com/forums/showp...929&postcount=3
01-12-2006, 11:18 PM
#18
I say if you do it, turn them out a little like sux2bu has, that way we can get some revenge on the ******* harley's with their exhaust blowing my mirrors off. 
I see tons of drag cars with this setup.
If you daily drive this setup however, i PROMISE it will get old though. You will definatly get harassed by the police and your neighbors as well lol.
I see tons of drag cars with this setup.
If you daily drive this setup however, i PROMISE it will get old though. You will definatly get harassed by the police and your neighbors as well lol.
01-12-2006, 11:28 PM
#19
Originally Posted by TheBlurLS1
I say if you do it, turn them out a little like sux2bu has, that way we can get some revenge on the ******* harley's with their exhaust blowing my mirrors off.
I see tons of drag cars with this setup.
If you daily drive this setup however, i PROMISE it will get old though. You will definatly get harassed by the police and your neighbors as well lol.
I see tons of drag cars with this setup.
If you daily drive this setup however, i PROMISE it will get old though. You will definatly get harassed by the police and your neighbors as well lol.
BTW the Popo never even look twice at me. It only gets CRAZY loud when i smash on the "loud" pedal. Thats the only thing that kinda sux right now. Cause of the stock cam i think it is TOO quiet at idle. but i'm hoping a T rex will change that.
