My setup:
00 Jdm ITR stock bottom block
00 Jdm ITR stock head w/ Buddy Club IV cams and valvetrain
BC .04 headgasket
Aem 2.75" CAI
4-1 2.5" header
Custom mandrel bent 2.5" straight pipe into a Dynomax str8 flow muffler
Tuned with Hondata s100
Stock ITR IM and throttle body

My question, should I get my throttle body bored to like 65mm (which is the biggest MAxbore does) and portmatch the IM? or should I get a 68mm or 70mm Professional products throttle body and have that port match with my IM? I just wanna know what will benefit my setup, the biggest without losing power or just keep them stock. Positive productive feedbacks are welcome. Thanks

 

Before investing into a TB/IM setup, I would do a better header like a SMSP/DTR/RMF. Then I would do the 65 with a ported IM by Import Builders or Rocket Motorsports, something like that. Here are a few snaps of one that was recently done for H-T member "neo," he recieved this from Jeff at IB. Hope you don't mind me posting these pictures neo









Allot of people have had great success with these, and in some cases they have made more power than itb's. Definetly look into a header though man.

 

I'm leaning towards getting a Profab header. After getting a header, going 65mm throttle body matched to my IM would be the best size to go with?

 

Yeah, the Profab's are pretty decent, but another 400 bucks and you've got yourself a custom made manifold for your car and would make more power. The 65 and ported IM with the BC4's will carry power though for sure

 

How much more do like DTR/SMS/RMF gain over Profab? I've done a search but couldn't find a comparison. What about Rage or Sparks tri-y

 

The Rage is a Hytech production manifold, the Sparks and Profab are copies of the SMSP 4-2-1. I haven't actually seen a dyno of a Sparks or Profab against one of Dave's manifolds, but I don't think 5-10 whp more would be out of the question. But it also depends on motor setup also of course. For pricing check my sig, we aren't allowed to post pricing on here.