It's 'common' Honda knowledge that honda valve springs can handle OEM redline + 400... well, at least on the d-series they do. Mickey
Senior Member
It's 'common' Honda knowledge that honda valve springs can handle OEM redline + 400... well, at least on the d-series they do. Mickey
Demetrius Mossaidis aka 'Mickey' #12 ITA NESCCA
'92 Honda Civic Si
STFU and "Then write a letter. www.crbscca.com"
2013 ITA NARRC Champion and I have not raced since.
Senior Member
Or WAY more - I ran my stock Z6 with a chipped ecu and took it to 9200 once a lap @ Mid-Ohio. Had that motor built and the valve springs were all in great shape within tolerance...Originally Posted by mossaidis
Matt Downing
1995 Honda Civic EX Coupe - ITA
Ohio Valley Region, SCCA
Senior Member
SNAP! Nice. I run my z6 to 7800, which is 600 over OEM. I used to receive signficiant HP loss after 7200 probably because of lack of efficient airflow after 7200 (D-series have small ports). With port matching and jackson racing IM gasket, it pulls nicely up until 7800 now.
Demetrius Mossaidis aka 'Mickey' #12 ITA NESCCA
'92 Honda Civic Si
STFU and "Then write a letter. www.crbscca.com"
2013 ITA NARRC Champion and I have not raced since.
Senior Member
This thread is shaping up to be a classic...
.....very informative.
Jake Gulick
CarriageHouse Motorsports
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lateapex911(at)gmail(dot)com
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I think the thread died a long time ago.
Demetrius Mossaidis aka 'Mickey' #12 ITA NESCCA
'92 Honda Civic Si
STFU and "Then write a letter. www.crbscca.com"
2013 ITA NARRC Champion and I have not raced since.
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