Alright guys, I have a 85mm bored gsr block, 11.5 c/r pistons, p&p gsr head, complete jun valvetrain including jun 3 cams, rc 310's, skunk2 portmatched manifold, 68mm rpm tb, p28/hondata setup. I made 237whp/162lbs with this setup as of now tuned by shawn at church automotive, running 60psi fp and the 310's are maxing out.

I'm debating on going itb's for more power, I was thinking of picking up a pair of 51mm jenveys with some 440's. Will I see tremendous amount of gains with my setup as it is with itb's? Also, this is going on a street/weekend car, so I'm curious as to how driveability will be affected.

I need people with first hand experience with itb's and built engines, thanks alot!


Modified by t.blizzard at 9:05 AM 8/24/2004

 

Yes it would make more power , but would not go larger than 50mm, That is what we have found to be the best. No, I cannot quote an exact gain, but can give you some realistic numbers if you are serious. E-mail me.

 

You have a pm sir.

 

I emailed you DonF, Lance at hayward performance recommended 48mm horns to me. How would that be? And would portmatching the itb's (jenveys) help any if at all?

 

You have mail.

 

replied

 

more power? damn your setup is sick as hell already, nice #'s, keep us posted when those ITB's. any timeslips yet?
oh yeah i dont know much about ITB's so cant help you, just had to show sum love for the setup

 

prolly get a good 5-8hp more peak ... torque is whole other story ... peak tq can go up 3-4 ft'lbs but average across the mid-range band can pick up anywhere form 20-25

good stuff, convert to ITBs, run at least 440cc injectors.

48-50mm is good enough

greg

 

Which should I go with between these two that would not hurt my performance as it is now, or be overkill. I want to get the most efficient setup suitable for my motor the way its built.

48mm taper throttles are:
48mm at the open air end,
45mm at the blade and
43mm at the manifold

-or-

51mm taper throttles are:
51mm at the open air end,
48mm at the blade and
45mm at the manifold

 

how do you get 43mm or 45mm at the manifold when the ports are oval.

 

hey t.blizzard i wanna buy your p28 ecu from you, but im trial so i cant IM you, i need it by monday the 15th so email me at davidmedve@hotmail.com ill pick it up from you im located in mission viejo so cal