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>> Hey all. Just wondering how much of a difference a tuned header will make on >> an engine. By tuned, I mean a header that has equal length tubes from each >> exhaust port to the collector. This compared to a header that has unequal in >> length tubes. >> > Ths Bill Fisher book covers this rather well. I think he claims 10-15%. This > should be balanced against the downside of imperfect fit and ground > clearance problems. Note also that there are differences in length between > different brands of OEM exhausts. Wow. 10-15% - if that's accurate, that's significant. I was just curious. I have a few headers for a Type 3, and the tubes look funny, compared to a Type 1. I understand the reasoning, but wasn't sure if it was something that was measurable. -- Phillip Bradfield Member: southern oregon vw club: http://www.sovw.com rose city volksters: http://www.rosecityvolksters.com ddb: http://www.theddb.com 1969 Variant - Savanna beige, Type 4 2.1l (soon), speedster soon to have a bus dash 1968 Variant - Granada red, 1835 with dual 40 Dellortos, with 67 euro fenders 1963 1500 - Ruby red, 1600 with dual Solex carburetors, soon to be full automatic! 19?? Sandrail - Primer, soon to have 2.3 EFI Turbo Ford motor ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org