How many people have bored out their stock Lude TB's and port matched their IM? I may have this done and was wondering if there was anything else that I need to consider? Thanks!

 

good ? I would like to know as well ....who does make the best TB Rc, holly,spoon ...

 

I bored one of my Prelude TB's to 64.5mm. It worked great. I ended up putting it on my EX's LS/VTEC when I changed to the Erick's racing TB. I can get you RC Engineering, and STR throttle bodies now. Both are really good and the STR stuff is availible in different sizes above 64.5mm.

 

http://www.inlinefour.com/70bigborbilt.html

looks good to me. May be a little overkill, however.

 

A few years ago I bolted up the gude 64mm TB, and ported the IM. I was impressed with the results for what I had spent. The butt-dyno registered better throttle response for sure, that's what was most noticable. I still have it, but i'm debating on using it as sometimes it sticks. I guess that's gude quality control for ya, haha!

 

I bored out the TB to 64mm and port matched the IM and ported the plenum. I don't remember if they ported the runners and matched the head or not..

 

I bought the STR 70MM TB with a port matched IM, butt dyno said it was worth it.

 

you guys running 70mm tb's with a non-forced induction car are ridiculous... i would only think that its going to hinder your performance since you are basically just decreasing your flow veolicty by having that unnecessary large diameter...

 

Thanks for the info guys. I didn't want to spend 350+ on an Eric's 68mm for minimal gains over a bored out Vtec TB. (Although I was really thinking about it!)

I got a quote of $200 for a bore to 64.5mm and a port match of the upper IM.

 

What is the optimal TB bore on an H22A motor that is NA exactly??

 

what is the stock bore on H22 TB

 

60mm i beleave, same as the h23a1

 

could i run a 70mm tb with the stock manifold

 

yes you will just have to cut up the manifold to enlarge it to 70mm


Personally, I'm gonna run a 50mm TB...
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