Im rebuilding a gsr motor and was wondering if anyone had any info on boring the stock throttle body. Such as cost, power gains, ht sponsors that do it? Would i have to bore my im to match the tb?

 

any decent machine shop should be able to do it....just make sure you don't overbore it and jump up like 8mm......and also, yes, the throttle body should be port-matched to the intake manifold.....theres is no reason to have a wider opening at the throttle body reduced by the inlet of the manifold, it will squander the airflow at the point where the TB matches up the IM

 

Awesome, thx. What would be a good mm to bore to? Its merely a mild street driven gsr. Nothing wild... also, how much should i expect to pay? Power gains?

 

bump?

 

The throttle body alone wouldn't be worth doing. It's more of a ricer thing as opposed to giving you any power.

 

ricer thing?

he wants some more power. every "bolt-on" counts on hondas.

check out http://www.maxbore.com

$100 bucks for a well respected guy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dvp &raquo;</TD></TR><TR><TD CLASS="quote">The throttle body alone wouldn't be worth doing. It's more of a ricer thing as opposed to giving you any power. </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by benjaminenjamin &raquo;</TD></TR><TR><TD CLASS="quote">ricer thing?

he wants some more power. every "bolt-on" counts on hondas.

check out http://www.maxbore.com

$100 bucks for a well respected guy. </TD></TR></TABLE>
Yeah, and i plan on port matching the im... this is all after i get cams to compliment the added airflow of course

 

I had my stock TB bored for a 62 mm throttle plate. That bore matches my stock GSR IM perfectly. Measure your IM bore to see if it is the same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">I had my stock TB bored for a 62 mm throttle plate. That bore matches my stock GSR IM perfectly. Measure your IM bore to see if it is the same.</TD></TR></TABLE>So whats the stock bore of the tb and intake manifold? I think mine is full of oil cuz of the blown engine. I looked in the tb and saw oil leakin out...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoltonGSR &raquo;</TD></TR><TR><TD CLASS="quote">So whats the stock bore of the tb and intake manifold? I think mine is full of oil cuz of the blown engine. I looked in the tb and saw oil leakin out... </TD></TR></TABLE>

The stock bore on the TB is 60mm at the throttle plate for a GSR. My stock IM has a 62mm bore (others could differ, but I doubt it). When I installed the 62mm TB, I centered it with my finger and the lip was virtually imperceptible.

 

You didn't mention cams. No cams and this would be a totally pointless thing to do.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dvp &raquo;</TD></TR><TR><TD CLASS="quote">You didn't mention cams. No cams and this would be a totally pointless thing to do.</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoltonGSR &raquo;</TD></TR><TR><TD CLASS="quote">


Yeah, and i plan on port matching the im... this is all after i get cams to compliment the added airflow of course</TD></TR></TABLE>

 

In your first post ...of course...

 

Take a look at this,
https://honda-tech.com/zerothread/1557649

They offer new bigger throttle bodies at a great price. They seem pretty good too. But I haven't had any first hand experience, so I can not fully comment on them. But it may be worth looking into.

Ali

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrinceAli132 &raquo;</TD></TR><TR><TD CLASS="quote">Take a look at this,
https://honda-tech.com/zerothread/1557649

They offer new bigger throttle bodies at a great price. They seem pretty good too. But I haven't had any first hand experience, so I can not fully comment on them. But it may be worth looking into.

Ali</TD></TR></TABLE>Thanks

 

buy another throttle body, intake manifold, and type r cams. and ur good to go make sure u tune it too with those new cams. change ur v tec timing too. thats what i would do!