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2.5" Down Pipe vs 3" D.P.with 3" catless back system?
Posted by 900 AERO JET (more from 900 AERO JET) on Sun, 29 Apr 2007 07:33:51
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1988 900 turbo has t3/t4 50mm t4 compressor wheel with t3 stock turbine. fmic, stg 2 chip, sd apc, 2.3 head/intake, 34lb injectors, open air filter, water injection (my remove it and spray the intercooler instead).
I have a on hand a Saab savior 90 degree soft bend 2.5" down pipe, and 3" magnaflow free flow muffler. so I am thinking of two options, A) use the 2.5" D.P. and go 3" after that (no cat). B) 3" all no cat.
can any one compare these two options?
many performance tuning shops say that it is always better to go wider toward the tail because it increases exhaust velocity, due to the higher pressure area to lower pressure area exhaust travel. and many Saab guys say go 3" complete. however some report boot loss when they went 3" all. and some report better performance.
Your experienced feed back is appreciated.
Thanks
900 Aero Jet.
posted by 151.204.144...
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