Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

found that dyno test quite interesting... is it THAT big of a difference to just switch the exhaust system? I didn't think so before!

check this out!

http://www.importreview.com/reviews/...mparision.html

interesting.... (the engine is a GSR)

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

dude that`s like a 3 year old dyno. LOL

they drop a gsr engine into a civic with the 1.7 pipings
plus they did the header too.

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

not to mention the change in VTEC engagement ::)

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

A stock civic has 1.7" piping? Damn that's pretty shitty. Of course there will be great gains with I/H/E. However, if you look at the final WHP, it's like 154.X, and I believe stock GS-R's dyno only slightly less than that so it's almost like recovering WHP that was being restricted. I clicked the link thinking 20HP gains from a stock GS-R's dyno.

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

you are right guys, but think of people that would run a homemade turbo with stock exhaust... i think that Justin was trying to say you could unleash all the potential by having a bigger exhaust system... and it might be 3 years old; some people might not have seen it ;) like me

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

stock gsr vtec is 4400 rpms.. and its variable all the way up to 5200 (depending on tps and load but at full throattle its 4400)

Re:Stock civic Exhaust VS 2,5" Exhaust DYNO (GSR swap)
 

ya but if u look at the graph the engagement point w/ the "stock" exhaust is 6k, thats sure to kill peak hp.