legacycentral bbs

Here's more good info

I'm at work now (or should be)

I will send a summary of it tonite after I'm home for the technically challenged

SSSPOON

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Somehow the message wouldn't forward from work. Here's the highlights;

Two (2) simultaneous muffler options; 1) straight thru, and 2) quieter more expensive reversing style

Both mufflers with single tastefully styled outlet

Three (3) "B" pipe options; 1) straight, 2) with cat, 3) with cat and resonator

Downpipe is where it gets complicated;

Simple most economical is the 3 inch with large fishmouth type flange at turbine outlet. Flows better than stock, and much better with no cat. Adding a cat should be no problem if necessary for the California criminals. O2 sensor in stock location

Best design keeps turbine and wastegate gas separated for 18-24 inches. Area inside turbine housing must be partitioned a la MRT. Pipe section directly after turbine should bulge using 30 degree expansion cone for 18-24 inches to allow swirling gasses from turbine to slow and straighten smoothly. Wastegate gas can be reintroduced with minimal performance loss. Converter in downpipe not doable with this design, single cat would be in usual location under shifter.

Overall system size recommended is 3 inch.

Ballpark for dump style downpipe is $325

Ballpark for dual style downpipe is $500

Transition from two cats to one probably legal in 49 but not in California

Read the full discussion from Russ to get all the details of this summary

Larry Witherspoon
ssspoon@aol.com



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