actual HP gain of going from 2.5" to 3"???? How much?
07-14-2003, 07:09 AM
#1
Honda-Tech Member
Thread Starter
Join Date: Jul 2001
Location: atlanta, ga, usa
Posts: 721
Likes: 0
Received 0 Likes
on
0 Posts
actual HP gain of going from 2.5" to 3"???? How much?
I'm trying to decide if it is worth the cost of a 3" exhaust system. I currently have a 2.5" thermal R+D and I was thinking of going to a 3" thermal. I'm running 1 bar of boost from the Apex'i kit on a B18B1.
Does anybody have any first hand experience of going from 2.25 or 2.5 to a 3"? What kind of numbers did it produce and was the in-car volume raised significantly?
Thanks
Does anybody have any first hand experience of going from 2.25 or 2.5 to a 3"? What kind of numbers did it produce and was the in-car volume raised significantly?
Thanks
07-14-2003, 07:14 AM
#2
Honda-Tech Member
Join Date: Sep 2002
Location: State College, pa, us
Posts: 727
Likes: 0
Received 0 Likes
on
0 Posts
Re: actual HP gain of going from 2.5" to 3"???? How much? (glagola1)
i went from a 2.5" to a 3" exhaust but i also took the cat out and gained 40 hp.
07-14-2003, 07:22 AM
#3
Honda-Tech Member
Thread Starter
Join Date: Jul 2001
Location: atlanta, ga, usa
Posts: 721
Likes: 0
Received 0 Likes
on
0 Posts
Re: actual HP gain of going from 2.5" to 3"???? How much? (TurboLude97)
That sounds GRRRR-REAT!!!
I'm running a 2.5" test pipe too but...
My power really drops in the high revs. I'm hoping that back pressure is partially to blame.
I'm running a 2.5" test pipe too but...
My power really drops in the high revs. I'm hoping that back pressure is partially to blame.
07-14-2003, 08:36 AM
#4
Honda-Tech Member
Join Date: Jan 2002
Location: Winchester, Va, us
Posts: 1,357
Likes: 0
Received 0 Likes
on
0 Posts
Re: actual HP gain of going from 2.5" to 3"???? How much? (glagola1)
Its not the exhaust that makes it drop in the higher revs, it is the small turbo.
You need a bigger turbo for the higher RPM's
3" is probally just going to make it worse.
Brian
You need a bigger turbo for the higher RPM's
3" is probally just going to make it worse.
Brian
07-14-2003, 09:35 AM
#5
Honda-Tech Member
Thread Starter
Join Date: Jul 2001
Location: atlanta, ga, usa
Posts: 721
Likes: 0
Received 0 Likes
on
0 Posts
Re: actual HP gain of going from 2.5" to 3"???? How much? (TurbodCX)
Yeah, the IHI is pretty small but I don't see how going to a 3" could make things worse. See, my torque peak is in the same spot as a stock N/A ls so I'm thinking the torque drop has something to do with the nature of the stock motor as well.
07-14-2003, 09:38 AM
#6
Honda-Tech Member
iTrader: (3)
Join Date: Feb 2002
Location: MN
Posts: 12,561
Likes: 0
Received 0 Likes
on
0 Posts
Re: actual HP gain of going from 2.5" to 3"???? How much? (TurbodCX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurbodCX »</TD></TR><TR><TD CLASS="quote">Its not the exhaust that makes it drop in the higher revs, it is the small turbo.
You need a bigger turbo for the higher RPM's
3" is probally just going to make it worse.
Brian</TD></TR></TABLE>
agreed!
but I personally would get a bigger downpipe and have it taper down to 2.5 full exhust.
**heres a though:..... keep your current exhust and just get a custom downpipe with an e-cutout
You need a bigger turbo for the higher RPM's
3" is probally just going to make it worse.
Brian</TD></TR></TABLE>
agreed!
but I personally would get a bigger downpipe and have it taper down to 2.5 full exhust.
**heres a though:..... keep your current exhust and just get a custom downpipe with an e-cutout
Thread
Thread Starter
Forum
Replies
Last Post
