Hey guys. I am planing on upgrading my throttle body here soon, and I am wondering what the very maximum bore that can be achieved on the stock H22 intake manifold? BTW, the manifold is gutted/ported etc, so please no "why are you using the stock manifold" questions. Thanks.

 

i got a 74 to match

 

I've done 70 on a gutted manifold. could go a little bigger though.

 

so 80mm+ is out of the picture i guess

 

keep in mind that bigger is not always better.

by having such a large TB without any sort of taper will significantly affect air flow velocity.

i'd suggest getting a tapered TB to find a compromise between air volume and velocity.

 

he's got a big turbo, thats all the air velocity he needs

 

^ touche

 

I have an STR 70mm Tb matched to a 70mm intake mani port opening on my h22a4 which will be sucking in turbo air

 

I think I might just take a shot with the 80mm and see if I can make it work.

 

endyne make a idle valve relocator.

 

you'll be able to get an 80 to fit....no problem...

**** some kid posted up a few weeks ago with an 80mm mounted to his mani that he didn't want....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redtop22 &raquo;</TD></TR><TR><TD CLASS="quote">keep in mind that bigger is not always better.

by having such a large TB without any sort of taper will significantly affect air flow velocity.

i'd suggest getting a tapered TB to find a compromise between air volume and velocity.</TD></TR></TABLE>


I think the reason that they come tapered is so that you don't have to modify the manifold so much to get them to work. I really don't think velocity has anything to do with it , but I could be wrong. Afterall the stock ones are straight through and so are the bigger mustang ones correct?

I'd like to see an 80 on one though, that'd be huge. I have a sketch of the bolt pattern at home I suppose I could draw a cirlce in there and see how big it could be.

 

Cool guys, I will be making an adapter plate and welding it on and see if I can make the beast fit.

 

q45

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6-213 &raquo;</TD></TR><TR><TD CLASS="quote">Cool guys, I will be making an adapter plate and welding it on and see if I can make the beast fit.</TD></TR></TABLE>

ahh, well if you're welding it on then that shouldn't be a problem at all. I know if you use the boly on style the throttle bore gets pretty close to the bolts that hold the adapter on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22 civic &raquo;</TD></TR><TR><TD CLASS="quote">q45</TD></TR></TABLE>

yes sir.