i have a jg victor x mani and am looking to get a throttle body for it... now i am a little confused as to what i should get regarding TB size. I believe that jg mani is 65mm?? so should i get a 65mm TB or get the mani ported to 70mm and get a 70mm TB? please help!!!! thanks...

 

It depends how much power you want. For under 350whp, it wont make much of a difference. Also depends on the size of your i/c pipes. No sense in getting a 70mm (3 inch) if your piping in only 2.5 (65mm)

Adriano

 

that is what i was thinking... i mean, i have a full race kit, but my ic piping is only gonna be 2.5 inch, so it would really be pointless for the airflow to open up 5 more millimeters for no reason really... im thinking i should just keep the 65 straight through...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pubestripe &raquo;</TD></TR><TR><TD CLASS="quote">that is what i was thinking... i mean, i have a full race kit, but my ic piping is only gonna be 2.5 inch, so it would really be pointless for the airflow to open up 5 more millimeters for no reason really... im thinking i should just keep the 65 straight through...</TD></TR></TABLE>

 

interesting. i figure why not go 70mm. same price right? maybe more surface are due to throttle plate just being there?

 

but really, isnt it pointless to go from the 2.5 inch to the 3 inch, and then back down to the 2.5??? that is really pointless IMO... y make a larger area for the air to go, only to find out that it needs to be compressed again back down to the 2.5?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pubestripe &raquo;</TD></TR><TR><TD CLASS="quote">but really, isnt it pointless to go from the 2.5 inch to the 3 inch, and then back down to the 2.5??? that is really pointless IMO... y make a larger area for the air to go, only to find out that it needs to be compressed again back down to the 2.5?</TD></TR></TABLE>

so going from 2.5intercooler piping to a larger throtle body to a event bigger intakemanifold runner would be bad? what abought the throtle plate with that there is dosent flow like a a true 2.5inch pipe

 

well. if your i/c piping is 2.5" which is about 63.5mm which means youd have to have a larger tb for it to be "equal" because you need to take the butterfly into consideration as a restriction, a small one but its still there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Casey &raquo;</TD></TR><TR><TD CLASS="quote">well. if your i/c piping is 2.5" which is about 63.5mm which means youd have to have a larger tb for it to be "equal" because you need to take the butterfly into consideration as a restriction, a small one but its still there. </TD></TR></TABLE>
exactly, so therefore 65mm is a perfect TB size...