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| Exhaust questions https://slantsix.org/forum/viewtopic.php?t=46344 |
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| Author: | Josh P [ Sun Oct 16, 2011 11:46 am ] |
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The more I think about it, the less tempting the 2.5" system sounds. Its meant for long headers with 3" collectors which means I'll need some extra pipe anyway. So I think I'll just go with some standard bends. I've also pretty much abandoned the idea of dutra duals, at least for now. I've read about people porting out the exhaust manifold outlet to 2.25" and getting some good results. Can anyone speak to what kind of performance gains this will bring? Also, which years had exhaust manifolds with space for an O2 sensor? |
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| Author: | Danarchy [ Sun Oct 16, 2011 6:26 pm ] |
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Here is one place that has aluminized steel and stainless steel $220-$300 plus shipping http://waldronexhaust.com/cart/index.ph ... =61_36_125 |
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| Author: | Josh P [ Sun Oct 16, 2011 8:07 pm ] |
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Quote: Here is one place that has aluminized steel and stainless steel $220-$300 plus shipping
Thanks, but that seems like a lot for standard pipe bends. I was quoted a better price for custom exhaust work at a local shop by a guy I trust.
http://waldronexhaust.com/cart/index.ph ... =61_36_125 |
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| Author: | Danarchy [ Mon Oct 17, 2011 12:30 pm ] |
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I just posted it as a price comparison, not to buy from them. |
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| Author: | Aggressive Ted [ Mon Oct 17, 2011 6:00 pm ] |
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Quote: I've read about people porting out the exhaust manifold outlet to 2.25" and getting some good results. Can anyone speak to what kind of performance gains this will bring?
It is about the same gain as removing the stock four blade fan and going to an electric fan. Both mods help response from 1500 rpm on up.
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