LS/VTEC final touches

[allmotor_integ]

yeah i just received my car back from the shop, looking to upgrade the throttle body.....does anyone recommend a certain brand and specific bore(size).......its for a daily driver,
Set _up
read my info

[randyman]

u can just bore out ur current tb to 64 mm -- it's cheaper and just as effective. but then again, u need to specify what kind of vtec head u have and what intake manifold ur using, the port size of the intake manifold, etc.

[allmotor_integ]

i have a p72-2GSR head i don't know the port size but i have a skunk2 intake manifold, is a 68mm tb too big i seen 70mm, what brand of tb do recommend such as eric racing, STR, etc,.....can u give me links to site that sells these tb, oh yeah whats the stock size of the tb on the ls integra.?

[randyman]

Originally posted by allmotor_integ
i have a p72-2GSR head i don't know the port size but i have a skunk2 intake manifold, is a 68mm tb too big i seen 70mm, what brand of tb do recommend such as eric racing, STR, etc,.....can u give me links to site that sells these tb, oh yeah whats the stock size of the tb on the ls integra.?

here are some tb sizes for b series (inside diameter):
b18c1 60
b18c spec R 62
b18a 58
b18b 60
b16a SiR 58
b16a Sir2 / b16a2 / b16a3 60
b20b/z 60

the Skunk2's inlet is 64 mm. as for ur current setup, i don't see any gains of getting 68 and even 70 mm bored tb's. if any, anything more than 64 mm will hurt performance since ur "over-feeding" ur engine. ur cams are not aggressive enough, ur compression is not high enough, ur exhaust setup is not sufficient enough to support the increased velocity and in turn hurts performance, and etc., etc.

so if u use a 68 and/or 70 mm tb, what happens is that the intake manifold itself becomes the "bottleneck". even if u bore out the intake manifold's inlet to 68 or 70 mm, the gains will be dependent on the engine's other components -- not just by one part or modification alone.

but if u still want to get the throttle body that u want, eric's racing, STR, edelbrock are some of the good ones out there.

check out STR's website and Edelbrock's website for more info. eric's website is http://www.importbuilders.com/

hth and goodluck.

[chris623]

how big did u say the ITR TB is? because if u want i have a JDM ITR TB and i'm looking to sell it cause it's sitting around doing nothing for me. it's brand new.