Knowing that there are some gains (modest) to be had by having head work done. If you had a local mechanic and shop to do the work to your car that you trusted, what would you ask for??
1. Valve job (5 angle..?)
2. Port and polish?
3. Bigger valves?

Someone has to perform factory like P&P jobs (ala works) for less than $1500 :smile:

 

Concentrate more on porting the exhaust side on the MCS. I wouldn't waste the money on bigger valves, but the help minimally. Then just do a nice valve job and put it back in with a more aggressive cam.

Hope that helps!

Randy

 

Thanks Randy!
What is involved with porting the exhaust manifold are you talking extrudehone? How much cost is involved?

P.S. I am an ex porsche guy as well I have owned 6 in total, the last was a 928
nothing quite like a v8. I know you are a busy man looking forward to a response on my email as well...thanks again :smile:

 

Hopefully your e-mail wasn't one from more than a week aga - they were all flushed with the site crash.

Head work is somewhat of a black art. You can either hand port it, which is what I was talking about, or you could extrude hone it, which really just cleans it up a bit instead of changing the flow all together. Talk to your local hot rod shop, in Porsche or Honda or good ole fashion muscle car circles, to find out the best guy in your area to do the porting.

Randy

 

Thanks Randy
p.s. just re-sent the email...fletch

 

Read this article.

LINK

Its a really great read!


--
Cheese

 

Considering the minimul returns, I'd leave it alone.

Its much easier to mess a head up and actually slow the car down than it is to make it faster through head work.

However, forced induction motors are more forgiving in this area due to the fact that they dont rely as much on the shape and contoure of the intake runners to generate velocity, they have a supercharger shoving the air in. Velocity is what you're looking for when porting a head, not volume. If volume was all you needed then you could port a head with a paddle bit and a Mikita drill.

Randy is correct, probably the most gain would be seen by a mild reshape of exhaust ports. Maybe just clean up the short turn coming out of the valve seat to ensure a smooth flow. Forced induction motors benifit greatly from getting exhaust gasses out of the engine ASAP. A turbo application would obviously need this more but Im sure that a supercharged engine would like it as well.

Im not sure what the factory cam specs are but I dont doubt that the car would probably see gains from a little more radical exhaust profile....more duration.

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