Here's the deal .. I just bought a Hondata heatshield intake manifold gasket. I figure that as long as I'm taking the intake manifold off I might as well pull out my trusty Dremmel and polish the runners. Has anyone else done this ?? Is it worth the hassle ?? I appreciate the feedback ...

 

Yes, I used Extrude Hone last year some time. On a Stock Cam ITR motor. that was making 185whp and 135lb-ft on a MD chassis dyno it did not improve anywhere except the very top of the RPM band. Instead of the curve peaking dropping it peaked and held until the rev limiter.

If I had a higher rev limiter, Bigger cams ECT ECT it might be worth it. But in a stock cammed, bolt on motor not worth it IMO

Mattj

 

http://www.hondaraceengines.co....html

do it right and open it up.

 

I heard that polishing the ITR IM doesnt do much because its already very nicely set up from the factory. Any truth to that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Willard &raquo;</TD></TR><TR><TD CLASS="quote">http://www.hondaraceengines.co....html

do it right and open it up. </TD></TR></TABLE>

oh my.

me likes , alot.

 

Wow!! That fabricated IM looks nice but its a little more than I want to spend right now. I've spoken to some locals who tell me that the polishing is really not worth the hassle.

I really don't expect to see a huge improvement but if I can get even a little benefit from it, then its not wasted time to me. Anyone else ??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iperez &raquo;</TD></TR><TR><TD CLASS="quote">I really don't expect to see a huge improvement but if I can get even a little benefit from it, then its not wasted time to me. Anyone else ??</TD></TR></TABLE>

you could actually lose power.

the rough casting aids in atomization.

 

See now there's a "show-stopper" ... So you think I should leave it alone ??

 

yeah, leave it alone. Save your money for other ways to make power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iperez &raquo;</TD></TR><TR><TD CLASS="quote"> So you think I should leave it alone ??</TD></TR></TABLE>

jep.

now port matching is a different story...

 

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

jep.

now port matching is a different story...</TD></TR></TABLE>


i took a dremel to port match mine and blend it a bit

i just did it while i was building the motor
dont do it unless u can take the intake manafold off and totally wash it out because alum gets everywhere

 

Ok ... yeah, I can take the IM out completely no problem. So, basically etch the Hondata gasket to the IM ports and match it with my Dremmel ?? Will it make a difference even though I am not port-matching the head ??

 

word , word.