bigjohnson

Will be installing an Apexi VAFC soon on CLS 6 Spd, any comments on the VTEC ingagement point? Thanks in advance.

bigjohnson

Anybody?

bigman

all i can say is that a dyno tune will get u the best power gains across the board.

bug230

You must get it tuned properly! and especially installed properly! If the sensors arn't set correct you may fuck up your motor!!!! Just spend the money and do it right.

mattg

if you are running FI, why get a vafc? you should be looking into e-manage.

scalbert

As Matt mentioned and as I recall, you have the SC?? If so the VAFC is completely worthless to you, even more so than if you were running NA.

Why is it worthless?? Because the MAP signal is already clamped with the ESM. Alterations to the MAP signal with the VAFC prior to the ESM will never be seen and are worthless. Changing it after the ESM should be accompanied by timing changes, which the VAFC cannot do, since lowering the total calculated load will increase timing. That is not what you want with the SC.

As for VTEC engagement, it is fine where it is at. When you are racing you are always above that point excluding the launch.

If I was incorrect about the SC, there is still no reason to get the VAFC. The gains are minimal at best. I have leaned out a NA TL-S all the way to to above 13.5:1 and the power didn't really change. I may have picked up a couple of ponies but that is questionable.

BTW, there are other routes to go to get more power.

bug230

I got 10whp through out after I tuned mine...not a huge deal but oh well.

scalbert

Did you tune it yourself or let someone else?? Were the collant temps recorded as well and kept in check??

I personally tuned on the dyno and could not extract any noticeable power. There are guys in the Chicago area who had a similar experience as myself. I ran the A/F ratio between 12.0:1 up to nearly 14.0:1 and the power did not change much to my surprise.

Only through timing and fuel changes can we get more out of the factory ECU. The VAFC does not touch the iginition timing.

bug230

I had it done by some good guys at Dynocomp, Where MtnBiker got all his motor mods done. Not sure what a "collant" temp is but they made sure the motor didn't expericne heat soak or anything. It took them about an hour to compleate the tune and the outside temp was arround 80f and humidity was low (I'm going off of memory). Here are the dyno graphs. The numbers will seem low due to the type of dyno which mimics real road coditions reguarding load. It is supposed allow them to tune properly.

BTW: my car is a 02 TL-s not a CL-S(as it says on the dyno)


http://www.acurainspired.com/gallery...d=834&uuid=373

scalbert

For one thing, your car was running too rich to begin with. That looks fine but there are other aspects which can influence the numbers. Myself and others have seen different results when tuning. It may be due to location or other uncontrolled circustance that you experienced different results. Or it could be partially due to uncontroled tests runs.

Just FYI, give me a car with the J32A2 engine and without any $$$ I can get a dyno plot with 7 WHP more within an hour.

scalbert

Sorry, typo, it was supposed to read coolant... :o

bigjohnson

Thanks for all the input, when it comes to electronics, I'm lost, when it comes to turning a wrench or two, I'm OK. Cybernation here in Ft. Lauderdale installs VAFC which is whom I will use unless it is completley useless to to install the device because of the SC. Scalbert writes - "BTW, there are other routes to go to get more power." I'm all ears.

When Scalbert speaks, people listen.

scalbert

Yes, with the blower the VAFC is basically worthless.

In order to get more power you will need more air. Do you have the HBP??

bigjohnson

Everytime I drive it I get HBP, (High Blood Pressure).....no, I'm so new to this and have read many threads on this board about it, high boost pulley, any recommendations as to the most reliable hbp? Thanks Scalbert...

scalbert

Who did you get the blower from?? They may be able to get the Comptech HBP for you. Otherwise, Velocity Resources probably could. I'm looking into another source also and will update once I confirm.

bigjohnson

There was a brand new unit up for bid on EBAY from a dealership in Lynnwood WA and I was fortunate enough to win with only one other bidder, talk about HBP (high blood pressure). I'll look into the Velocity Resources.

I noticed on an earlier thread when you were experimenting with various size pulleys, you mentioned an Air Fuel ratio concern. If I was to put this pulley on, are there other Mods that should be made.



http://cgi.ebay.com/ebaymotors/ws/eB...ayphotohosting

Taking my time for the ultimate ride. BigJ

scalbert

Yes, but that was with even more boost and with the intercooler. With just the HBP you will not need anything else.

me_big_head_229

hbp???

scalbert

The Comptech High Boost Pulley. It jumps the boost up to about 5.5 - 6 PSI.