S2000 CNC Cylinder Head
07-25-2003, 12:27 AM
#11
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What results? Numbers?
THe RSX head is virtually identical to the S2000 head in terms of port size, dimensions, locations, etc. Been there, measured that. And you don't develop a CNC program without first going through and doing it by hand. The RSX I tested gained 5 hp after all the headwork. I don't sell any products, modify cars, etc. so I'm the unbiased source for results. As I said, I haven't seen results for _any_ ported head on an S2000, and I and several other owners here commissioned some work on an S2000 head a long time ago, but no one has done a definitive dyno.
As for insinuations, its just the facts.
UL
THe RSX head is virtually identical to the S2000 head in terms of port size, dimensions, locations, etc. Been there, measured that. And you don't develop a CNC program without first going through and doing it by hand. The RSX I tested gained 5 hp after all the headwork. I don't sell any products, modify cars, etc. so I'm the unbiased source for results. As I said, I haven't seen results for _any_ ported head on an S2000, and I and several other owners here commissioned some work on an S2000 head a long time ago, but no one has done a definitive dyno.
As for insinuations, its just the facts.
UL
07-25-2003, 06:23 AM
#12
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man sounds like a lot of salesmen talk to me.
"Not tested on a street car"
"Power gains should be dramatic"
"seen the results with my own eyes on my own engine"
Can you explain to me how you see the results?
Also
"since the flow numbers gained were way more than expected"
What does that mean? I expected a 1% better flow but got 5% That's 500 times better flow? NUMBERS my friend, it's all words without numbers. You are running into folks who have known forever that the S2000 head was heavily overengineered (lack of better term escapes me at the moment) and designed among the best.
"Not tested on a street car"
"Power gains should be dramatic"
"seen the results with my own eyes on my own engine"
Can you explain to me how you see the results?
Also
"since the flow numbers gained were way more than expected"
What does that mean? I expected a 1% better flow but got 5% That's 500 times better flow? NUMBERS my friend, it's all words without numbers. You are running into folks who have known forever that the S2000 head was heavily overengineered (lack of better term escapes me at the moment) and designed among the best.
07-25-2003, 06:31 AM
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Must have missed that one. Care to share a link? 300rwhp? or 300 at the crank? Also you even stated that it was among other things that they did. I just don't think Porting and Polishing alone will yield dramatic gains in HP.
07-25-2003, 09:19 AM
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I don't know about R&D, but I would be very sceptical about getting some CNC ported head before seeing some proven results.
I have heard that the quality of a CNC ported head is far inferior to a "hand" ported one.
I have heard that the quality of a CNC ported head is far inferior to a "hand" ported one.
07-25-2003, 11:23 AM
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The Car and Driver article underscores an interesting little tidbit.
That being that there are many posters in this very web page who swear that they have achieved anywhere from 150 to 160 MPH in their "stock" S2000.
It's interesting because the 332 hp S2000 that was taken to Bonneville only managed around mid 150's as their top speed.
Somebody is cooking the books.
That being that there are many posters in this very web page who swear that they have achieved anywhere from 150 to 160 MPH in their "stock" S2000.
It's interesting because the 332 hp S2000 that was taken to Bonneville only managed around mid 150's as their top speed.
Somebody is cooking the books.