Questions on CAI benefits for 5sfe and twin loop mufflers Options

[3sgteLuke]

So before i got the celica (puma cubed) i had this badass VW passat (puma squared) that I LOVED. It was a '94 vr6 GLX. Ugly as hell but a legend around my neighborhood. Anyway i had a twin loop muffler installed and it sounded awesome. VR6 engine + twin loop catback = pure sex. my question is whether a 5sfe would respond well to a twin loop too. I know its not the best flow but its a less obnoxious exhaust and some back pressure is actually good for performance.

my other question involves the cold air intake im about to finish. So far I only have a short ram w/o a heatshield but i will be running to the fender within the week. Just how much will this do for my engine? will it feel exactly the same as my short ram or will I actually get a benefit? response? peppier? more torque???

This post has been edited by 3sgteLuke: May 7, 2008 - 10:32 PM

[Terracar]

3sgteluke,

My experience has been with both drop-in, modifying stock box, short ram, CAI and Ram air intakes on the 5sfe. It terms of butt dyno the power gains go from least to most

By the butt/feel dyno the power diff you will notice is miniscule between CAI and SRI - the BIG thing you will notice is heatsoak/sluggishness off the line between SRI and CAI. SRI in my experience is more sluggish off the line until air gets flowing through the engine bay whereas the CAI has less of a sluggish response. (CAI only has to clear warm air in tube to get rid of sluggishness. Ram air works quite well though off the line response is less than SRI/CAI once you get some air flowing it really starts to shine.

In regards to to the exhaust I went with a straight exhaust with race muffler 2.5" - this was too big with the 5s as alot of low end torque was sacrificed for minimal gains up top. I think 2.5" exhaust with the twin loop would be a much better setup without the ricer fart can sound - though twin loops sound a little strained at the upper rpm range.

With the reground cams you will lose the low end torque of the 5sfe and move it farter up into the mid rpm range - great improvement in 3rd gear.

Though as with any info given on forumns - take it with a grain of salt as alot of misinformation is given - I am only providing you a description of my experience.

-Terracar

This post has been edited by Terracar: May 14, 2008 - 10:34 AM