paintball1

alirght thanks, ppl were saying my engine was going to die lol

stangalator

all back pressure does is move the curve, low pressure moves the torque curve to a higher rpm i believe. where as a restrictive exhaust has a lower rpm peaking torque curve.

not damage will result, besides the ear damage from open headers at WOT

Chubstang

The thing you need to worry about is exhaust velocity. Just so know, an o/r pipe with LM1's or straight pipes is going to sound like **** and be obnoxiously loud. The first time you drive it with that setup you'll regret it.

paintball1

thanks the guy was like saying how it would make my engine work harder

mrtstang

This must be right! When i threw on a o/r x pipe (vs my high flow catted h) the car didn't have the same midrange torque feel, but it pulled the same in the higher revs from my perception.

gif4445

I had a thread a few months back about backpressure. There was a guy on there that was very helpful in explaining that backpressure is BS. haha!

cliffyk

There's really no such thing as "backpresure" in an exhaust system, it's just pressure as anything but open ports will have some restriction--this article explains it well...

[edit]

This is good reading too...

WhiteNoise

i get into soooooooo many arguements over this subject. it doesnt even make sense how u can burn anything up when u have fee flow. the only reason u would need any is if ur cam overlap is so wide that u spew out air /fuel. but thats just plain hear say crap

01snake

yea i have lt's and they say it creates enough back pressure in the primarys

im about to run open lt's

01snake

maby on your car i have had tons of people ask what my combo was and i was running lt's o/r x, slp 1's dumped