I'm thinking of getting the skunk2 b18c5 intake mani as i have a b18c5 cylinder head on my 1994 Si. If im gonna make that change im guessing I will need a 62mm throttle body?

What if I want a 65mm TB or larger, do I need to bore the intake mani slightly to match the size of the TB bore? If not, whats the point of having a larger TB (bigger than 62mm) with a b18c5 intake mani??

 

bump - anyone??

 

65mm is direct bolt on. i believe 70mm you would need to bore out the mani.

bigger also gives out the sick *** wide open throttle growl sound.

 

Get 65mm i have the skunk2 manifold and the jg 65mm throttle body on mine nad they are both very nice.

 

what about for a 91 ls with everything stock cept for a cai,cat back, and strut bars
, whats the max tb size i can go to before i have to do any machine work?

 

you have a type r head, and you want a skunk2 mani? what kind do you have on there now? i hope you realize the skunk2 is a replica of the type r, with a few minor differences...

 

Yea I have a type r head but I have the non-type r manifold, i.e. dual plenum.

 

So are you saying you have a gsr manifold that is all hacked to **** so that it will fit on a pr3 head? Who the hell would ever do that? EVER? Thats like sleaving a 350 chevy to a 3.736 bore and making a 305 out of it. Kinda pointless.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fink2iCe &raquo;</TD></TR><TR><TD CLASS="quote">Yea I have a type r head but I have the non-type r manifold, i.e. dual plenum.</TD></TR></TABLE>
are you sure you have a b18c5 head and not a b18c1?

 

Can't be 100% sure, the car was sold to me like this. The car revs to just over 8000rpm nicely. My car is not a GSR, it is a JDM Si VTEC and has the B18C block. I the fitting of the intake mani looks clean, no hacking or crackin

 

Does the head say p72 on it??

 

where should I look for this??

 

on the front of the head, above the exhaust manifold. it will say P72 or PR3 or some such.