Quote:
Originally Posted by psiperformance
heres the simple truth on these cars.
shorties dont make enough of a difference to be worth the money.
reason ? the stock engine makes sub 350 horsepower and the stock manifold is a EXCELLENT design its very effecient and shorties only gain around 5-6 rwhp over the stock manifold on a bolt on car.
so is 5-6 rwhp worth the 600 bucks install and parts cost ? .. your call ..
long tubes however can be worth a honest 25 rwhp on these cars ..
the long tube headers work because they use the long tube to create a scavenging effect or a small vacume in the exhaust tube wich actualy helps pull even more exhaust out of the chamber..
imagine a tube trying to syphon gas. once you get the gas flowing through a long tube it will continue to flow all on its own due to its momentum and this same vacume/scavenging effect.
when you add any type of forced indution, nitrous or blower then even the shorties are worth significant power but the long tube will always come out ahead due to the scavenging effect of the longer tube.
if a shortie makes more power up top then a long tube.. it is because it was compared to a long tube that was to small a diameter for that application.
acutaly yes some do.
most use shorties some use cast iron manifolds and some evne use a long tube type header and mount the turbo a decent distance from the engine.
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sans STS and of course you may use a modified shorty. anyone can make a turbo kit with some flipped shorties on a 5.0
but you dont just stick ab frp shorty header on a car with a pro turbo kit