Whats Better to get HFC'S or Test PIPES?!?!
#16
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Whats Better to get HFC'S or Test PIPES?!?!
I bet the stock heads flow real well if it's making power up to 7000, plus the oversquare bore/stroke and 2 throttle bodies are great for High rpms. A narrow exhaust and restrictive factory cats choke up a good breathing motor, an engine to me should be as power efficient as it can with external parts.
Last edited by Rr1982; 05-11-2016 at 06:57 PM.
#21
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New dyno after test pipes and retune - Nissan 370Z Forum
No idea, just says before and after the test pipes w/ tune. The 24whp claim is from a guy further down that post. Either way, the PO's main question is which is better and I was asking how that other guy couldn't feel ANY difference after the upgrade..
The real answer is they are marginally better than high flow cats but they ARE better, cheaper too. For me, I'd gladly lose 1-2hp and ONLY run HFC to avoid the smell and CEL but that's just me..
No idea, just says before and after the test pipes w/ tune. The 24whp claim is from a guy further down that post. Either way, the PO's main question is which is better and I was asking how that other guy couldn't feel ANY difference after the upgrade..
The real answer is they are marginally better than high flow cats but they ARE better, cheaper too. For me, I'd gladly lose 1-2hp and ONLY run HFC to avoid the smell and CEL but that's just me..
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