lowering vtec engagement??
08-07-2004, 07:36 PM
#12
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Re: lowering vtec engagement??
If you had something like an Integra Type R or an S2000 with new, more aggressive cams or something I'd say go for it. Realize that your VTEC is in place not to make your car a top end, high performance monster, but to keep the environment happy by allowing you to get a few extra MPG.
Besides, like everyone said, its set there for a reason, if you lower it, it'll prolly hurt you more than benefit you. With a cam, you can never get optimal horsepower or torque throughout the entire RPM band.
Besides, like everyone said, its set there for a reason, if you lower it, it'll prolly hurt you more than benefit you. With a cam, you can never get optimal horsepower or torque throughout the entire RPM band.
08-08-2004, 04:27 PM
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Re: lowering vtec engagement??
vtec also works off oil pressure. If you lower the vtec make sure the oil pressure is high enough to hanle the vtec lobe and the extended valve opening.
08-08-2004, 09:11 PM
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Re: lowering vtec engagement??
i know this might sound backwards but in MOST cases you actually benifit more with raising the vtec engament , i have dyno sheets to prove this , i picked up 4 whp from moving my vtec up from 4800 to 5200 on a jdm pr3. what car/engine/ecu are you running?
08-09-2004, 04:58 AM
#19
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Re: lowering vtec engagement??
p2p obdII ecu
I dont know all the specs on the oil pressure and all that good stuff
http://www.honda-tech.com
I dont know all the specs on the oil pressure and all that good stuff
http://www.honda-tech.com
08-09-2004, 03:54 PM
#20
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Re: lowering vtec engagement??
Dyno graphs, 2 of them.
One pull with no vtec, one pull with vtec all the time or set really low. Where the graphs overlap is the best place to set vtec. This way you'll maximize your power curve because vtec will take over when the lower lobes fall off in power.. It's very easy really.. Changing vtec rpm is not easy on an OBD2 car though, because the ECU can't be chipped and you have to rely on a piggyback computer as a band-aid for proper tuning.
One pull with no vtec, one pull with vtec all the time or set really low. Where the graphs overlap is the best place to set vtec. This way you'll maximize your power curve because vtec will take over when the lower lobes fall off in power.. It's very easy really.. Changing vtec rpm is not easy on an OBD2 car though, because the ECU can't be chipped and you have to rely on a piggyback computer as a band-aid for proper tuning.