Opinions on porting of heads
11 December 2004, 07:38 AM
#2
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In engine responsiveness, apparently, yes. In performance, I'd be surprised if you saw more than a few percent up. Port'n'polish is really something mostly done on naturally aspirated engines, where in a stage-3 development you can really see the difference. The roughness of intake and exhaust tracts really isnt anythig to bother with on a turbocharged vehicle IMHO. If your car is running 350+ lbf torque, you might see a difference in drive with port'n'polish, but to my knowledge it's so expensive (as its very labour intensive, aprox a week I'd guesstimate) that with the same money, more power gains are to be had elsewhere.
But don't rely on my oppinion alone, I've never driven one with a porting job done on it!
-Antonis
But don't rely on my oppinion alone, I've never driven one with a porting job done on it!
-Antonis
11 December 2004, 03:45 PM
#3
the info is much appreciated therefore i can look forward to getting the car back next week rather than after x-mas if i got the heads ported.
Originally Posted by banny sti
What would be the effect of getting the heads ported? would there be a significant improvement in performance and engine response?
11 December 2004, 05:25 PM
#4
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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
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Theres more than a few % increase to be had, depending on what heads and cams you run! Cam timing also plays a part.
11 December 2004, 06:34 PM
#5
standard sti version 3 heads and cams, which are considered to be the most aggresive factory cams of all the STI's.
Originally Posted by David_Wallis
Theres more than a few % increase to be had, depending on what heads and cams you run! Cam timing also plays a part.
12 December 2004, 02:11 PM
#6
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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
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I have sti3 heads and cams.. (well I started with them.. but mine are a little wilder now)
Id not bother doing anything with them at the moment! - until you start chasing silly power figures.
Id not bother doing anything with them at the moment! - until you start chasing silly power figures.
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