Purchasing an A'PEXi VTEC AFC. What are your opinions on the product itself as a whole. What are your opinions as a means of compensating the lean fuel mixture of slightly tuned engines. (intake/exhaust/header) Anything else regarding the company.

Installing A'PEXi on:
1994 Honda Accord EX 4dr
Matrix 4-2-1 2pc header
Matrix CAI
Tenzo exhaust
ECU reset

 

Apexi is a top notch race company. The VTEC AFC is agreat product and gives you an average gain of 3-5HP when tuned right. I personally think its the best VTEC controller on the market because of the fine tuning it allows you to do.

 

I heard it's very hard to tune it right. You need a pro and a dyno. If you don't get it right, your car will actually run slower. I was looking into that also and now changed my mind and looking into the Jet performance chip that's self learning and tuning.

 

The A'PEX'i is a very crude way of tuning an compared to tuning the stock ECU. It has 10 tuning points compared the the stock ECU's 400.

If you move the VTEC point you can be as much 10 % fuelling and 6 degrees of ignition timing out. OBD II ecus have a learning feature that often overrides your tuning after a few days anyway.

Tell me more about this Jet thing.

Doug


[Modified by Hondata, 7:07 AM 8/10/2001]

 

Well..... of course the best way to modify your fuel curves and Vtec is to just reprogram your ECU or get something like a DFI. But I dont have $2000 to spend on an ECU.But as far as piggy back type boxes are concerned Apexi AFC is the best. Its only difficult to tune because of the fine detailed tuning it allows. As for JET .. I think its crap.There nothing more then a gimmick. Unless someone shows me some dyno sheets to prove me wrong.

 

With a dyno and a dyno techie that knows what he's doing, tuning a V-AFC should not be hard. I went to a dyno with my friend and his MR2 Turbo. Now he has an S-AFC, which is similiar to the V-AFC. I know this is an extreme case, but anyway...he had just upgraded his turbo, and was running extremely rich! His first run was about 160whp, not good at all. After about 10-12 tuning runs (he was REALLY out of whack) he put down 246whp, the only different being tuning the S-AFC. He was about 30% too rich, LOL

 

i wouldnt waste your money on that jet chip crap...just send it out to jdmhondaparts.com, jason(katman) has different programs you can choose from, check it out...

 

I have a f22 engine in my accord. There are really no ECU's out there for my vehicle. Could a dyno techie reprogram my ECU, since I'm not going to add any more components, to perfection and leave it that way.

 

how do you figure it would over ride your input after a few days when i can drive for weeks at the same specs before i manually change them. also, when change settings you kinda have to know what you are doing (e.g. if you are gonna change the vtec point, how much fuel do you have add/reduce at different rpm stages?) if you dont know, dont get one. its all mathematics, and dyno time.

 

well, i have a Vafc and i'm more than happier with it. I havn't done any dyno time, but i used it to smooth out my idle a little, and raise up the vtec xover for the cams i put in. Its not all that complex when you compare it to other more expensive systems, but a bargain for just a little over $300. They are on sale at www.inlinefour.com for $315.00.