Custom Exhaust system
#1
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Custom Exhaust system
I have a pipe bender here at the house but it only does 2 inch pipe. I didnt think that would be big enough, but then i was looking at the exhaust on mazdatrix and it was only 2 inches. Anyone have any opinions.
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A 2" pipe is perfect for a non-turbo RX-7. However, your tubing bender will kink the pipe and reduce the inside diameter, which will slightly reduce the flow rate (but not by a significant amount on a street car). If you want maximum flow, you should buy pre-formed mandrel bends and then cut and weld them to straight pipe to form your custom exhaust system.
#6
Camshaft
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Back to the topic though...
I thought the ideal NA size was 2.5? I only ask because I don't know...
#7
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Usually. But generally speaking more exhaust flow is going to change your powerband, HP isn't everything, you don't want to gain HP but lose to much torque. Too big a pipe and you may lose to much low-end, not like we have any anyways right?
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#9
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No, because the exhaust gas stagnates in the pipe if the exhaust velocity is too low. Were there no limit to the "bigger is better" turbo exhaust theory, then you would see professional turbocharged race cars with 24" or larger exhaust pipes. Unfortunately, exhaust system design is very complex, and involves much more than just the pipe diameter.
#10
Camshaft
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No, because the exhaust gas stagnates in the pipe if the exhaust velocity is too low. Were there no limit to the "bigger is better" turbo exhaust theory, then you would see professional turbocharged race cars with 24" or larger exhaust pipes. Unfortunately, exhaust system design is very complex, and involves much more than just the pipe diameter.
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aaron i hope that is a joke cause its been proven that backpressure helps low end torque....on n/a engines if you dont think thats the case. try running a straight header and compare it to a full exhaust. then get back at me
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