porting
#1
porting
Hello, I have a stock 84 rx7gsl 12a. it needs a little more power. It has no cat, turbo muffler and a nikki carb. I took the spring out of the vaccuum secondary diaphram and didn't see much difference ( I wonder if the secondaries are even opening). Power seems to top out at 6800 rpm. My main question, is it possible to do a street port without removing or rebuilding the engine. Also, since the cat is gone, and exhaust flows well, would a header make a measureable difference. Carb works well, but can't find the idle screw. Choke works but fast dile doesn't. Thanks for any advice.
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Join Date: Jan 2002
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http://www.pineappleracing.com/index.html They do porting, also www.mazdatrix.com is another good site.
#5
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The header will probably give you the best bang for your buck. If you want to port your engine, you'll probably want to replace your carb with a side draft or a holley and put on a full exhaust to really take advantage of the port job.
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