Anyone use this resource before?
www.headerdesign.com
The primary size it recommeds for my car is AMAZINGLY small....1.25"
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Anyone use this resource before?
www.headerdesign.com
The primary size it recommeds for my car is AMAZINGLY small....1.25"
No fun for rotaries
The results for a 1.6 VW motor look to be pretty similar to what Stahl sells for a header. I couldn't figure out what length to make the exhaust after the collector, did i just miss that in the calculator somewhere?
Jeff your motor is basically two banks of 1.8 liter 4 cylinder motors, right? With a fairly low peak HP RPM, and not really high peak HP number either, right? That size primary might sound about right. I think the vast majority of all commercial headers are probably way too big, the size is a marketing tool...
Hey I just bought this software ($45) out of curiosity, anyone interested in sending me some info I can enter it and see what it comes with for header & exhaust design...
http://www.maxracesoftware.com/pipemax36xp2.htm
Evan, turn on your PMs and send me a note about what info you need... - GA
Ron and I have thought this for a while. "Old school" thinking was bigger is better. Now, smaller primaries is thought to increase exhaust gas velocity and therefore scavenging. I agree with you, smaller is probably better on a low rpm hp peak car.
I saw your pm. I'll get you the information I have here shortly.
Quote:
Originally Posted by evanwebb
Maybe old news, but here is a pretty good overview of header design theory: http://www.ssheaders.com/header.htmQuote:
Originally Posted by JeffYoung