[PARAZZI]

Hey guys,

I am thinking to get a 3" downpipe for my setup, cause as off right now I only have a 2". I have a 2.5" full catback exhaust with a testpipe. I have heard if I swith to a 3", I might run too lean. Is this true? I know tuning is one of the ways to prevent this. BUt is there any suggestions you guys can make until I havent got my setup properly tuned yet? THanks.

 

[SpoolinSol]

going from a 2" to 3" MAY make you turbo spool quick enough to throw off your tune; so plan on getting a re-tune...

 

[94z6ex]

going from a 2" to 3" MAY make you turbo spool quick enough to throw off your tune; so plan on getting a re-tune...

:TU: what he said.

 

[PARAZZI]

going from a 2" to 3" MAY make you turbo spool quick enough to throw off your tune; so plan on getting a re-tune...

i am thinking to get the downpipe done sometime within 2 weeks. but after i get the downpipe, i wont be able to get it tuned right aways cause i dont have a wideband yet. so what would you suggest? hold off the downpipe first and get a wideband? or go ahead with the downpipe and just not boost hard? thanks man.

 

[JoelAllenClear]

Better to be safe than sorry... wait til you can tune it.

 

[konigcivic]

why go with a 3" downpipe if you only have a 2.5" exhaust? seems like it would be a waste.

 

[98_4drCivic]

why go with a 3" downpipe if you only have a 2.5" exhaust? seems like it would be a waste.

I couldn't disagree more.

if you are unhappy with the 2.5 inch exhaust after you get the new downpipe, you could still unhook it from the downpipe at the track.


i'm going to be running a 4in dp to 2.5in exhaust...but with a cutout.

 

[93 red ls]

yea get a re-tune you can see any where from 15-30hp difference in the 3in compaired to others

 

[bermanator]

I couldn't disagree more.

if you are unhappy with the 2.5 inch exhaust after you get the new downpipe, you could still unhook it from the downpipe at the track.


i'm going to be running a 4in dp to 2.5in exhaust...but with a cutout.

thats exactly what i'm doing, i have a 3" mandrelsex downpipe going to a shittier 2.5" crush bent exhaust, and i plan on getting one of those electronic cutouts

 

[areskzc]

My dp is 2.75 to meet the 3" ex pipe

 

[PARAZZI]

I couldn't disagree more.

if you are unhappy with the 2.5 inch exhaust after you get the new downpipe, you could still unhook it from the downpipe at the track.


i'm going to be running a 4in dp to 2.5in exhaust...but with a cutout.

damn 4" dp eh? thats gonna be pretty nuts...i heard that is better to start out bigger on the dp like 3" then, you can go smaller on the rest like 2.5". i was thinking to get a full 3" exhaust, but just short of cash oh yeah, what does the cutout do? .

 

[PARAZZI]

since my setup is not fully tuned yet, a friend of mine told me not to worry about getting the 3" dp too much. but dont get me wrong, i will still get it properly tuned once i have enough funds for a wideband. any truth in this?

 

[LowDog]

I'm also going from 2" dp to 3" this weekend (running a 2,5" catback) i'm not gonna have it tuned rightaway. but i don't boost that much right now anyway.

 

[kulo]

t3 60trim 48ar with 3" dp or 2.5"?

 

[vtec-e94hatch]

3 inch is huge!

 

[kulo]

size makes up for qiucker spool time and throttle response and power doe?

 

[98_4drCivic]

damn 4" dp eh? thats gonna be pretty nuts...i heard that is better to start out bigger on the dp like 3" then, you can go smaller on the rest like 2.5". i was thinking to get a full 3" exhaust, but just short of cash oh yeah, what does the cutout do? .

yeah, i'm trying to decide between 3.5" and 4"....but its going to be on a topmount and a huge turbo...

 

[PARAZZI]

I'm also going from 2" dp to 3" this weekend (running a 2,5" catback) i'm not gonna have it tuned rightaway. but i don't boost that much right now anyway.

damn, good to hear man. i guess i wont boost that hard in the meantime, till i can get my setup properly tuned.

 

[PARAZZI]

do you guys know how much hp (approximately in numbers) that I will gain from a 3" downpipe?

 

[vtecduck]

oh yeah, what does the cutout do? .

the cut out lets you dump the exhaust straight out so it doesn't have to travel all the way through the exhaust. Check out quicktimeperformance.com.