Exhaust Ideas....
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Veteran
Joined: Jun 2011
Posts: 453
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From: Orange County, CA
Pretty good looking setup and interesting placement of the mufflers. I see that you included the X crossover - good move. Are you planning on coating or wrapping the headers and collecters or leave them exposed? Probably with the short headers it shouldn't matter much since the exhaust won't have a chance to cool much in that short distance. What size pipes are you using?
I like the locking stage 8 bolts, did you use them on the headers as well or just on the collectors? I would have considered using that type of fastener on my jeep if I'd heard of it a couple of years ago. I might still go for that since the manifold fasteners have a tendency to slowly loosen over time.
I like the locking stage 8 bolts, did you use them on the headers as well or just on the collectors? I would have considered using that type of fastener on my jeep if I'd heard of it a couple of years ago. I might still go for that since the manifold fasteners have a tendency to slowly loosen over time.
today....give a couple of hours....
Record Breaker
Joined: Nov 2011
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From: Ontario, Canada
x pipe = exualized pressure, the headers are already ceramic coated. I might warp the downpipe, i hate the fact it steams when getting water on it. and its 2.5 pipe all the way threw. fastners ARE AWESOME. Oh and the Tech support over there is even more amazing, they got me bolts here with 1 day turn around time.
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Veteran
Joined: Jun 2011
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From: Orange County, CA
can i ask why doug thorley? (if you need headers i can get you ceramic gibsons for a little cheaper than cost, and thats not why i asked this question either.....)
Record Breaker
Joined: Nov 2011
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From: Ontario, Canada
I'm not sure you'll get any noticeable gain, but it certainly won't hurt and will move some of the heat farther down the exhaust. If I was going to wrap the down pipe, I'd wrap it all the way to the crossover - this would keep the exhaust hot to the next logical expansion point (the crossover will act as that expansion point), and even though the down pipe length isn't tuned, the expansion in the crossover should help in pulling the gases through (as well as help balance the V8 exhaust pressure).
Thread Starter
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Veteran
Joined: Jun 2011
Posts: 453
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From: Orange County, CA
I'm not sure you'll get any noticeable gain, but it certainly won't hurt and will move some of the heat farther down the exhaust. If I was going to wrap the down pipe, I'd wrap it all the way to the crossover - this would keep the exhaust hot to the next logical expansion point (the crossover will act as that expansion point), and even though the down pipe length isn't tuned, the expansion in the crossover should help in pulling the gases through (as well as help balance the V8 exhaust pressure).
Record Breaker
Joined: Nov 2011
Posts: 1,013
Likes: 2
From: Ontario, Canada
At one time I got interested in dabbling around with fluid dynamics (job related interest) and got a bit deeper into the gas dynamics as it related to exhaust systems (hobby related) and built a couple of exhaust systems that I was fairly happy with & the principles haven't changed except that it's become a lot harder to work with exhausts due to the emissions testing requirements and computer controlled engines. I liked your approach with the oxygen sensor extender to make the computer happy, but how are you going to make the local emissions bureaucracy happy when you get your truck tested for outputs? You'll end up testing high on NOX since you don't have the cat to remove it. Around here, we need to get an emissions test every 2 years, so throwing out the cats would become a problem.
Thread Starter
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Veteran
Joined: Jun 2011
Posts: 453
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From: Orange County, CA
At one time I got interested in dabbling around with fluid dynamics (job related interest) and got a bit deeper into the gas dynamics as it related to exhaust systems (hobby related) and built a couple of exhaust systems that I was fairly happy with & the principles haven't changed except that it's become a lot harder to work with exhausts due to the emissions testing requirements and computer controlled engines. I liked your approach with the oxygen sensor extender to make the computer happy, but how are you going to make the local emissions bureaucracy happy when you get your truck tested for outputs? You'll end up testing high on NOX since you don't have the cat to remove it. Around here, we need to get an emissions test every 2 years, so throwing out the cats would become a problem.