Quote:
Originally Posted by bcredliner
I have never heard equal length headers that didn't sound better than stock exhaust manifolds. However, I have also never seen where headers change the HP/TQ significantly. Very interested in dyno sheets. Don't recall, l do you have a baseline run with everything the same other than headers?
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I will be doing another baseline dyno as soon as the headers arrive which will be a stock 4.6 engine with the TerraPhantm/DUDMD tuned DME. I thought I included the dyno sheets the builder had for an s62 engine w/dinan headers and exhaust versus his headers and exhaust. Just in pipes alone there was a 26hp jump over the Dinan setup.
Yes, an m62 vs an s62, there will be different results but anything has to be better than the stock manifold and with the results he posted I don't think the 4.6 will suffer at all from the addition of these headers and a free flowing exhaust.