v-tec modification
06-13-2003 | 10:58 AM
#1
Thread Starter
3 Hondas in the garage
Joined: May 2003
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From: Northeast Goergia
v-tec modification
Hi folks,
I've looked online and saw somewhere that you can lower the RPM at which the v-tec kicks in. Is that something you do in the ECU programming? Is it safe to do? Is it cheap to do?
I've looked online and saw somewhere that you can lower the RPM at which the v-tec kicks in. Is that something you do in the ECU programming? Is it safe to do? Is it cheap to do?
06-13-2003 | 11:20 AM
#3
wooo nascar!
Joined: May 2002
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From: baltimore
Re: v-tec modification
Originally posted by Andrew97CivicEx
Hi folks,
I've looked online and saw somewhere that you can lower the RPM at which the v-tec kicks in. Is that something you do in the ECU programming? Is it safe to do? Is it cheap to do?
Hi folks,
I've looked online and saw somewhere that you can lower the RPM at which the v-tec kicks in. Is that something you do in the ECU programming? Is it safe to do? Is it cheap to do?
06-13-2003 | 11:20 AM
#4
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Joined: Jun 2003
Posts: 76
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From: West End of RichmonD Va
yes there is a way to do it. its called a VAFC VTEC controller and u can get one for around $375 *pm me if interested*
yes it modifies the RPM at which Vtec kiks in D16y8 kiks in at 5500 rpm, u can modify it by 500 rpm increments. BUT. u must have it tuned right becausxe the VAFC messes with A/R ratio, and u can mess up ur engine by not having the proper settings
Dan
yes it modifies the RPM at which Vtec kiks in D16y8 kiks in at 5500 rpm, u can modify it by 500 rpm increments. BUT. u must have it tuned right becausxe the VAFC messes with A/R ratio, and u can mess up ur engine by not having the proper settings
Dan
06-13-2003 | 11:27 AM
#5
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Joined: May 2002
Posts: 1,771
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From: philly pa
Originally posted by DanyeruDono
yes there is a way to do it. its called a VAFC VTEC controller and u can get one for around $375 *pm me if interested*
yes it modifies the RPM at which Vtec kiks in D16y8 kiks in at 5500 rpm, u can modify it by 500 rpm increments. BUT. u must have it tuned right becausxe the VAFC messes with A/R ratio, and u can mess up ur engine by not having the proper settings
Dan
yes there is a way to do it. its called a VAFC VTEC controller and u can get one for around $375 *pm me if interested*
yes it modifies the RPM at which Vtec kiks in D16y8 kiks in at 5500 rpm, u can modify it by 500 rpm increments. BUT. u must have it tuned right becausxe the VAFC messes with A/R ratio, and u can mess up ur engine by not having the proper settings
Dan
and secondly, don't you mean a/f?
06-13-2003 | 11:52 AM
#6
Hybrid Forum Moderator
Joined: Mar 2000
Posts: 2,363
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From: Southwestern PA
You can change the rpm VTEC engages out with a $20 rpm activated swtich. All it basically is controled by is one wire from the ECU to the VTEC solenoid. The problem is why would you want to. Honda designed their head/cam setup specifically for the stock changeover point. If there was more power to be gained by moving it, it would be there in the first place. Also, when VTEC engages, the engine is fed more air, so it needs more fuel. If you change the VTEC point alone, the extra fuel in the ECU's stock map won't come on until it should. You could run lean if you move it down and rich if you move it up. It's not really dangerous, just no ideal.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
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Andy - Reinstated Hybrid Forum Moderator
'06 Subaru Legacy Spec B - Stock, for now
'98 Civic EX - CTR headlights and grill, Kosei K1's, for sale
'90 240SX - SR20DET that will never get installed, project car.
06-13-2003 | 12:12 PM
#7
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Originally posted by Andy
You can change the rpm VTEC engages out with a $20 rpm activated swtich. All it basically is controled by is one wire from the ECU to the VTEC solenoid. The problem is why would you want to. Honda designed their head/cam setup specifically for the stock changeover point. If there was more power to be gained by moving it, it would be there in the first place. Also, when VTEC engages, the engine is fed more air, so it needs more fuel. If you change the VTEC point alone, the extra fuel in the ECU's stock map won't come on until it should. You could run lean if you move it down and rich if you move it up. It's not really dangerous, just no ideal.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
You can change the rpm VTEC engages out with a $20 rpm activated swtich. All it basically is controled by is one wire from the ECU to the VTEC solenoid. The problem is why would you want to. Honda designed their head/cam setup specifically for the stock changeover point. If there was more power to be gained by moving it, it would be there in the first place. Also, when VTEC engages, the engine is fed more air, so it needs more fuel. If you change the VTEC point alone, the extra fuel in the ECU's stock map won't come on until it should. You could run lean if you move it down and rich if you move it up. It's not really dangerous, just no ideal.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
06-13-2003 | 01:04 PM
#9
Still here... sorta...
Joined: Sep 2000
Posts: 17,177
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From: CO
Originally posted by Andy
You can change the rpm VTEC engages out with a $20 rpm activated swtich. All it basically is controled by is one wire from the ECU to the VTEC solenoid. The problem is why would you want to. Honda designed their head/cam setup specifically for the stock changeover point. If there was more power to be gained by moving it, it would be there in the first place. Also, when VTEC engages, the engine is fed more air, so it needs more fuel. If you change the VTEC point alone, the extra fuel in the ECU's stock map won't come on until it should. You could run lean if you move it down and rich if you move it up. It's not really dangerous, just no ideal.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
You can change the rpm VTEC engages out with a $20 rpm activated swtich. All it basically is controled by is one wire from the ECU to the VTEC solenoid. The problem is why would you want to. Honda designed their head/cam setup specifically for the stock changeover point. If there was more power to be gained by moving it, it would be there in the first place. Also, when VTEC engages, the engine is fed more air, so it needs more fuel. If you change the VTEC point alone, the extra fuel in the ECU's stock map won't come on until it should. You could run lean if you move it down and rich if you move it up. It's not really dangerous, just no ideal.
An piggyback fuel computer like a V-AFC (that also can change the VTEC point) is useful for small adjustments to the fuel mixture to produce more power, assuming you have a dyno to tune with. The ability to change the VTEC point would also be useful if you ever changed cams to one that perfer a different changeover point. The fuel tuning abilities will also help fill in the fuel map as well. Seeya.
At least he asked.. gotta learn sometime.
