i'm looking to get a throttle body for my B18C1 but i need some help.....people are telling me to go with a 70mm i was thinking of using the 64mm can anyone help which one would be better.....oh yea i'll also be using the skunk 2 intake

 

Bigger is not always better, especially if you are playing with an all-motor setup. Please give us more information on what you are trying to do with the car so we can help you out...

 

when sizing a t-body, remember that velocity is your best friend when your going all motor

 

as of now i'm doing little bolt on things.... i plan to stay all motor......but soon i plan to do the ctr cams open up the head a little and change the valve train and get the ecu done raise vtec and revlimiter

 

GTM: i already bought a skunk2 manifold. Should i use the STOCK gsr tb or get an ITR one? plz help with suggestions..

 

The ITR throttle body will give you very little, almost negligable increase in power with the bolt ons and work you previously listed. If you are planning to build a serious all-motor engine, you might as well go to the aftermarket and get something larger than the ITR unit.

But for a larger than OEM throttle body, we always suggest at least the following for our customers:

1. Ported and polished cylinder head - Usually we cut out the valve guides and reinforcements completely from the intake side and make sure the exhaust side is well polished. Also, we do NOT port match. The Intake port is always larger than the mating surface on the manifold, and the exhaust port is always smaller than the header. Do this to avoid possible turbulence.

2. Titanium Valve Springs, retainers, and Stainless Valves

3. Extrude Honed Intake Manifold

4. A well-tuned exhaust system (headers back)

5. And possibly higher compression pistons.

With all the above work, you will really be able to utilize the benfits of a larger throttle body!

Good Luck

 

i was thinking of using a 68mm.......what size is the itr throttle body.....also do u know a place that i could get a good deal on one Thanks for the help

 

i'm also planing to add a fule presure regulator and a msd with a coil is there a need to do an ecu upgrade if so what would u recomend

 

Why get a 68mm TB? The skunk2 Intake manifold is only 64mm... just get the GSR TB bored by Raver Performance to 64mm...

 

so if i got the 68mm i would have to open up the intake.....the 64mm would be a direct bolt on......would there be a hp differance between the two