VTEC controllers?
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Joined: Jun 2005
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From: Allentown PA, - Phila, PA
Thread Starter
notaQQbear
Joined: Feb 2007
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From: New Jersey
lol
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Joined: Nov 2006
Posts: 67
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From: Boise, ID
my 2 cents...
first off if you search you will find the topic covered often.
This is the conclusion I have come to after reading a lot of posts about the VAFC.
They are not useless, just limited. The VAFC is something for people who dont plan on doing a major build, basicly if you only plan on I/H/E then a VAFC can give you small gains. Idaho Speed Center here in Boise Idaho claims the VAFC will typicly gain 10-12 hp after dyno tuning with I/H/E. If you plan on doing a larger build, say turbo, cams etc., then it would indeed be a waste of money. Why? Because the VAFC does not adjust spark/timing. It can only adjust fuel trims (air to fuel ratio), and the VTEC crossover, along with having some monitering tools. When or if you get a VAFC, you must have your car dyno tuned to see where how your cars power band looks and try to smooth it out with the VAFC's "fuel correction". I have been told (havent seen for myself), typicly our cars run too rich when we put a short ram or CAI installed, but just forget about that, cause what matters is what the dyno tells you. Adjusting the fuel and saving the settings while on the dyno is where you will get your gains.
As for lowering the x over point. I have heard people say that "honda placed the x-over point where it should be for optimal performance" I have also been told that a "properly working vtec" does not have THAT much of a kick. On that note, why did Honda make the x-over point on the new RSX higher to give it a bigger kick instead of optimal performance. OK so here is my point. I think after you do get I/H/E and VAFC dyno tuned lowering the x-over point A WEEEEEE BIT may help. I have seen a lot of people lower the x-over point to 4800 rpm, and these are people who know what they're doing, not just some dumb kid who got a VAFC and dropped the x-over to 3000 rpm.
once again, they are useless if your planning a major build, not useless for mild builds...if you have a mild build and get a rom editor, I find that silly as well.
first off if you search you will find the topic covered often.
This is the conclusion I have come to after reading a lot of posts about the VAFC.
They are not useless, just limited. The VAFC is something for people who dont plan on doing a major build, basicly if you only plan on I/H/E then a VAFC can give you small gains. Idaho Speed Center here in Boise Idaho claims the VAFC will typicly gain 10-12 hp after dyno tuning with I/H/E. If you plan on doing a larger build, say turbo, cams etc., then it would indeed be a waste of money. Why? Because the VAFC does not adjust spark/timing. It can only adjust fuel trims (air to fuel ratio), and the VTEC crossover, along with having some monitering tools. When or if you get a VAFC, you must have your car dyno tuned to see where how your cars power band looks and try to smooth it out with the VAFC's "fuel correction". I have been told (havent seen for myself), typicly our cars run too rich when we put a short ram or CAI installed, but just forget about that, cause what matters is what the dyno tells you. Adjusting the fuel and saving the settings while on the dyno is where you will get your gains.
As for lowering the x over point. I have heard people say that "honda placed the x-over point where it should be for optimal performance" I have also been told that a "properly working vtec" does not have THAT much of a kick. On that note, why did Honda make the x-over point on the new RSX higher to give it a bigger kick instead of optimal performance. OK so here is my point. I think after you do get I/H/E and VAFC dyno tuned lowering the x-over point A WEEEEEE BIT may help. I have seen a lot of people lower the x-over point to 4800 rpm, and these are people who know what they're doing, not just some dumb kid who got a VAFC and dropped the x-over to 3000 rpm.
once again, they are useless if your planning a major build, not useless for mild builds...if you have a mild build and get a rom editor, I find that silly as well.
Last edited by WhiteNoiz; Feb 21, 2007 at 10:08 AM.
Thread Starter
notaQQbear
Joined: Feb 2007
Posts: 30
Likes: 0
From: New Jersey
my 2 cents...
first off if you search you will find the topic covered often.
This is the conclusion I have come to after reading a lot of posts about the VAFC.
They are not useless, just limited. The VAFC is something for people who dont plan on doing a major build, basicly if you only plan on I/H/E then a VAFC can give you small gains. Idaho Speed Center here in Boise Idaho claims the VAFC will typicly gain 10-12 hp after dyno tuning with I/H/E. If you plan on doing a larger build, say turbo, cams etc., then it would indeed be a waste of money. Why? Because the VAFC does not adjust spark/timing. It can only adjust fuel trims (air to fuel ratio), and the VTEC crossover, along with having some monitering tools. When or if you get a VAFC, you must have your car dyno tuned to see where how your cars power band looks and try to smooth it out with the VAFC's "fuel correction". I have been told (havent seen for myself), typicly our cars run too rich when we put a short ram or CAI installed, but just forget about that, cause what matters is what the dyno tells you. Adjusting the fuel and saving the settings while on the dyno is where you will get your gains.
As for lowering the x over point. I have heard people say that "honda placed the x-over point where it should be for optimal performance" I have also been told that a "properly working vtec" does not have THAT much of a kick. On that note, why did Honda make the x-over point on the new RSX higher to give it a bigger kick instead of optimal performance. OK so here is my point. I think after you do get I/H/E and VAFC dyno tuned lowering the x-over point A WEEEEEE BIT may help. I have seen a lot of people lower the x-over point to 4800 rpm, and these are people who know what they're doing, not just some dumb kid who got a VAFC and dropped the x-over to 3000 rpm.
once again, they are useless if your planning a major build, not useless for mild builds...if you have a mild build and get a rom editor, I find that silly as well.
first off if you search you will find the topic covered often.
This is the conclusion I have come to after reading a lot of posts about the VAFC.
They are not useless, just limited. The VAFC is something for people who dont plan on doing a major build, basicly if you only plan on I/H/E then a VAFC can give you small gains. Idaho Speed Center here in Boise Idaho claims the VAFC will typicly gain 10-12 hp after dyno tuning with I/H/E. If you plan on doing a larger build, say turbo, cams etc., then it would indeed be a waste of money. Why? Because the VAFC does not adjust spark/timing. It can only adjust fuel trims (air to fuel ratio), and the VTEC crossover, along with having some monitering tools. When or if you get a VAFC, you must have your car dyno tuned to see where how your cars power band looks and try to smooth it out with the VAFC's "fuel correction". I have been told (havent seen for myself), typicly our cars run too rich when we put a short ram or CAI installed, but just forget about that, cause what matters is what the dyno tells you. Adjusting the fuel and saving the settings while on the dyno is where you will get your gains.
As for lowering the x over point. I have heard people say that "honda placed the x-over point where it should be for optimal performance" I have also been told that a "properly working vtec" does not have THAT much of a kick. On that note, why did Honda make the x-over point on the new RSX higher to give it a bigger kick instead of optimal performance. OK so here is my point. I think after you do get I/H/E and VAFC dyno tuned lowering the x-over point A WEEEEEE BIT may help. I have seen a lot of people lower the x-over point to 4800 rpm, and these are people who know what they're doing, not just some dumb kid who got a VAFC and dropped the x-over to 3000 rpm.
once again, they are useless if your planning a major build, not useless for mild builds...if you have a mild build and get a rom editor, I find that silly as well.
Member
Joined: Nov 2006
Posts: 67
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From: Boise, ID
I thought this might be of interest to you. I just had my VAFC Neo installed in my car and dyno tuned a few days ago. gain of 10-18whp. it was a little different each time they ran the dyno....I have a dyno sheet that shows proof of a 10whp gain. tech said it ranged from 10-18. worth it if you ask me. Plus the monitering tools are cool. my evaluation of its performance. I really dont notice much differance until I get into the top end (3k+), but the dyno showed a 4-5 hp increase on the beginning of the curve, up to 10 in vtec. once I get over 3k I can really feel a differance. my vtec was set at 5k, that helped a lot too, thats right, its better than the setting from the factory boys and girls...straight up. could be the extra hp. overall the cars powerband feels smoother, stronger at the top, and just plain faster. Vtec pulls harder. One other cool thing, the fuel is trimmed down .1-6% Seems like the harder I push on the gas the more fuel the vafc trims. I have noticed that I am getting better milage.
More whp, better milage, cool monitering tools, lower x-over with power gains...
proof, the VAFC is not worthless...period. in fact, I recommend it if you dont plan on boosting or doing a major n/a build.
More whp, better milage, cool monitering tools, lower x-over with power gains...
proof, the VAFC is not worthless...period. in fact, I recommend it if you dont plan on boosting or doing a major n/a build.
Last edited by WhiteNoiz; Mar 8, 2007 at 09:33 AM.
Member
Joined: Nov 2006
Posts: 67
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From: Boise, ID
btw, your just pissed I got some good gains haha
Last edited by WhiteNoiz; Mar 8, 2007 at 09:48 AM.
I missed Sean
Joined: Aug 2004
Posts: 11,285
Likes: 1
From: Fairfield/Bridgeport CT
well, no.
torque is the power put down to the wheels, horsepower is merely how much work it is capable of doing at that RPM.
power is the significant value here, and a gain of 3ft-lbs with a shitty controller isn't a big deal to me.
torque is the power put down to the wheels, horsepower is merely how much work it is capable of doing at that RPM.
power is the significant value here, and a gain of 3ft-lbs with a shitty controller isn't a big deal to me.