What size exhaust piping on (91) rx7 NA?
#1
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What size exhaust piping on (91) rx7 NA?
I am specifically asking about the piping after the cat or racepipe, I think most of you knew that already. Gonna get headers as well. The exhaust is corksport header back, it is offered in 2.5 inches or 80mm (3.15 in.), so which is best for an NA, thanks.
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I run a 2" header(2.5 at the collector) on my streetport 87n/a.. its loud.. I can't imagine going larger. I run a high-flow cat(2.5" in and out) then split to the dual mufflers all 2.5" was a huge improvement. I can't see the need to go larger unless your running something more than streetport or custom carbs etc. what mods on the engine? that would help to know....
I'm thinking of removing the cat as i no longer have to get smogged
I'm thinking of removing the cat as i no longer have to get smogged
Last edited by Sch1Tz0; 11-04-10 at 11:51 AM. Reason: added details
#4
Many people advise against anything bigger than 2.5" for n/a. I don't feel like searching and finding specifics, but I don't think you'll find anyone wholeheartedly suggesting the 3.15".
#5
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it is a NA '91 currently all stock with only apexi power intake. Planning on the exhaust, haltech for a little tuning and than sometime down the road a large pineapple street port (portland based rotary shop) and probably 720 injectors, all with the haltech so somebody should be able to fine tune everything. so i assume the 2.5 but welcome all comments i really appreciate feedback
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I personally would not go any bigger then 2.25inch ID on the piping.
Larger pipes allows larger volume of air to exit with the accompany of loud sound but that doesnt help any if the velocity is low.
Then theres the exhaust pulses from collected headers which is basically a forum in itself lol.
There are lots of threads about it, you can search and read up on them if you like.
Larger pipes allows larger volume of air to exit with the accompany of loud sound but that doesnt help any if the velocity is low.
Then theres the exhaust pulses from collected headers which is basically a forum in itself lol.
There are lots of threads about it, you can search and read up on them if you like.
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it is a NA '91 currently all stock with only apexi power intake. Planning on the exhaust, haltech for a little tuning and than sometime down the road a large pineapple street port (portland based rotary shop) and probably 720 injectors, all with the haltech so somebody should be able to fine tune everything. so i assume the 2.5 but welcome all comments i really appreciate feedback
#11
it is a NA '91 currently all stock with only apexi power intake. Planning on the exhaust, haltech for a little tuning and than sometime down the road a large pineapple street port (portland based rotary shop) and probably 720 injectors, all with the haltech so somebody should be able to fine tune everything. so i assume the 2.5 but welcome all comments i really appreciate feedback
#20
#22
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As far as linkage, go to summit racing and look for their magnaflow straight through stainless mufflers.
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