Simple AP1 tune
03-05-2012, 08:57 AM
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Simple AP1 tune
Hi,
I'm looking to do a fairly simple tune on an 00' AP1. The only thing I'm planning to do is install a VAFC with a dyno tune, and its sounding like 5500 RPM is the sweet spot for VTEC engagement on a stock system.
Ideally, I would like VTEC to engage a little lower to give more midrange grunt since I normally dip lower in the RPM range while autocrossing. The low speed corners are tough, it would be really helpful not to downshift as much. I read around and saw that a Test pipe/hi-flow catalytic converter would make it possible to lower the VTEC engagement even further since there are resonance issues on the hi-cam with the stock system.
I will not being going the test pipe route since I want to be legal for autocrossing, so will something like a 63 mm HFC be beneficial in terms of allowing a lower VTEC engagement point and possibly giving a little more torque? Has anyone gone this route with good success, or is a simple VAFC tune enough?
I'm looking to do a fairly simple tune on an 00' AP1. The only thing I'm planning to do is install a VAFC with a dyno tune, and its sounding like 5500 RPM is the sweet spot for VTEC engagement on a stock system.
Ideally, I would like VTEC to engage a little lower to give more midrange grunt since I normally dip lower in the RPM range while autocrossing. The low speed corners are tough, it would be really helpful not to downshift as much. I read around and saw that a Test pipe/hi-flow catalytic converter would make it possible to lower the VTEC engagement even further since there are resonance issues on the hi-cam with the stock system.
I will not being going the test pipe route since I want to be legal for autocrossing, so will something like a 63 mm HFC be beneficial in terms of allowing a lower VTEC engagement point and possibly giving a little more torque? Has anyone gone this route with good success, or is a simple VAFC tune enough?
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