Is it worth doing? What is involed in it? How much would it cost?

I need a new TB. I have one laying around but its a h23TB. Pretty sure its not the right size. Could it even be bored out to 62 mm?

Thanks

 

You can bore the H23 TB out to about 64mm. Yes you can do 62mm (I bored my old one out that far) and I think RC engineering and Maxbore offer a service and probably a couple more. But for a little more you can get a new 68 or 70mm TB http://www.midwestmotorsportsinc.com

related threads:
https://honda-tech.com/zerothread?id=1557649

 

Good info.

I seen a bunch guys in that thread really happy about getting an oversized TB. Like 68mm. The IM's are only 60mm mabey 62mm.

Whats to benefit from slapping a 68mm tb onto a 62mm IM?

 

i would say basically no benefit unless you match the im to 68

 

i'm pretty sure Maxbore does port matching to the IM if you send him both

 

Maxbore charges and you have to pay for shipping on the IM too. It's cheaper to get a black permanent marker, a sharp nail or scribe and a $3 rat-tail file and do it yourself. Use the marker to mark up the IM's mating surface. Install the TB onto the IM without the gasket. Open the TB and use the scribe to score a visible line in the marker, that shows you where the TB port lines up. Uninstall the TB and use the file to remove material up to the scored line in the IM.

Might take an hour or less and it's cheaper than paying some one else to do it for you.

Pirate

 

What about butterfly valve?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">
Whats to benefit from slapping a 68mm tb onto a 62mm IM?</TD></TR></TABLE>

The most noticable thing to me about a lrger throttle plate is response. The bigger your TB, the more air you will let in faster, so just barely opening a 70mm will be like opening a 60mm a bit more. I hope that makes sense...like my 70mm makes the gas pedal a lot more sensitive because of the size.

Then of course you will have capability to flow more air at high rpms if you need it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">You can bore the H23 TB out to about 64mm. Yes you can do 62mm (I bored my old one out that far) and I think RC engineering and Maxbore offer a service and probably a couple more. But for a little more you can get a new 68 or 70mm TB http://www.midwestmotorsportsinc.com
</TD></TR></TABLE>


whats with the midwest motorsports link?? haha they are local to me here in Iowa, nothing to do with honda as far as I know though.

 

i found acura throttle bodies on that site for like 130-150

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rosko &raquo;</TD></TR><TR><TD CLASS="quote">whats with the midwest motorsports link?? haha they are local to me here in Iowa, nothing to do with honda as far as I know though.</TD></TR></TABLE>

http://www.midwestmotorsportsi...d=154

Acura throttle bodies. $135 Pretty cheap. No core required.

Not much to do with honda but they've got a couple items.

 

ohh cool! yeah thats a big circle/dirt track shop around here. might have to pick one of those up then.

 

Thread Jackers
(shakes head)

 

Okay guys thanks for all the imput. Odds are Im just going to have it sent to Maxbore, sounds easiest to me. If it Effes up well its on him.

All though I do like the idea off doing it myself, Ill have to pass up on the TB part. Although I am probally gonna give the IM a nice little port job with my Angle Grinder, the thought of that makes me happy. Its my favorite tool...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote"> Although I am probally gonna give the IM a nice little port job with my Angle Grinder, the thought of that makes me happy. Its my favorite tool... </TD></TR></TABLE>

You're taking an angle grinder to your IM?!

 

I know its a little crazy, but I found diffrent attachments at home depo.

 

dude......

use a file like pirate said. you WILL end up taking off too much material and ****'ing up your IM

 

getting a larger throttle body and "porting" your IM wont do anything unless you compensate for the extra air....TUNE TUNE TUNE

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95greenlude &raquo;</TD></TR><TR><TD CLASS="quote">getting a larger throttle body and "porting" your IM wont do anything unless you compensate for the extra air....TUNE TUNE TUNE</TD></TR></TABLE>

It will cause a loss at low rpms

 

^yea......i've driven a b20vtec with a 70mm before.....low rpms were so sluggish

 

Man that sucks. Mabey Ill buy it and keep it on the shelve till I get a tuning system.