

| Subject: | Speaking of heat and rubber.. CV boots? |
| From: | Don Hanson |
| Date: | Tue, 19 Oct 2010 18:49:54 -0700 |
Anyone want to guess or actually divulge knowledge on how much heat the inner CV boot on a manual tranny van could take? I am having some custom pipes bent for the exhaust on my "new" 2.0 liter Jetta motor in my 84 van. The Inline Tuners tell me that about 30" is the correct length for the primary 'runners' on the dual downpipe manifold that is the best one for the ABA motor..30" and then you merge the two into one and on to the cat and muffler. I am thinking in order to get that length in a Vanagon installation I shall turn the pipes forward...run them along the driver's side of the motor then cross under the nose of the tranny and return along the passenger side.. In order to preserve full ground clearance, I am thinking I might go just below the CV joints...I shall probably have to make some type of heat shield to keep the boots from being too hot...especially when stopped with the motor going...Right? My alternate plan is to simply make the downpipes as long as I can get to fit, configured like my current system....guessing I can put about 24-29" inchers in there, doing it like my single down pipe current exhaust....But that will mean some power I don't get from having the full optimum length. It should still be a significantly better breathing system than the tiny single pipe that is sharply bent and crudely welded that I am running so far.... The tuners (Techtonic Tuning in Or.) tell me they dyno out ABA motors, with just this one exhaust change, and see them usually gaining 10-12hp..I'd like that, for just the cost of a nice fall drive to Bend to the exhaust shop and some fab time $ using all the parts I have and the manifold that came with my $300 motor... Don Hanson
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