Lowering VTEC

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01-05-2006, 07:59 AM

#11

05S2K

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I read some where that the S2000's ECU will eventually revert back to the stock settings after some time. Is this true???

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01-05-2006, 08:25 AM

#12

RoaringVtec

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Once you change your Vtec engagement you'll have to change your fuel map from that Vtec rpm on correct?

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01-05-2006, 08:40 AM

#13

Silver9k

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Quote:

Originally Posted by versionJDM,Jan 4 2006, 11:16 PM

if you dont mind saying, you can pm me if you want, what AFR are tuned at? i am trying to find a good AFR to aim for. also, what kind of power are you putting down? thanks bro!

You remember the 230whp thread in JDM tuning right? Ah Ha

I'm making about 225whp...I think my a/f ratio is around 13.5

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01-05-2006, 08:47 AM

#14

jin6

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Quote:

Originally Posted by CIVICTOS2000,Jan 5 2006, 06:12 AM

I got mine lowered to 5800 with a VAFC-II on a DYNO and I gained like 15 WHP with my mods , and its good but I don't Understand Why you want to lower it so much? then you shouldn't have VTEC and just have a High rpm cam.....IMO ....Also by lowering it to 5800 I get a smoother VTEC engagement ....

D.

my car liked a lower vtec and it made good midrange, but it wont be much fun for fwy driving on your high cam. that's why for daily driving i have it at 5000rpm. if im gonna average 80mph then i just turn it up to 5600 cause i have 4.57fd so dont wanna be in vtec. we need bigger cams. if you can keep lowerin ur vtec then we definately need bigger cams. there should be some new cams coming out this year.

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01-05-2006, 09:04 AM

#15

John_Z

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Quote:

Originally Posted by RoaringVtec,Jan 5 2006, 10:25 AM

Once you change your Vtec engagement you'll have to change your fuel map from that Vtec rpm on correct?

Yes, and your timing also.

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01-05-2006, 09:17 AM

#16

kayvan_pour

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Quote:

Originally Posted by John_Z,Jan 5 2006, 10:04 AM

Yes, and your timing also.

just have to reset the ecu, thats all.

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01-05-2006, 09:35 AM

#17

John_Z

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Unless you're running a standalone

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01-05-2006, 10:07 AM

#18

twohoos

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You need to get the thing tuned on a dyno and adjust VTEC accordingly. Some motors don't respond well to lowering VTEC, others do. Whatever the case, just do whatever gives you the most power.

There's nothing inherently dangerous about lowering the VTEC point, but it IS dangerous to use a VAFC without it being tuned specifically for your motor.

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01-05-2006, 10:15 AM

#19

Moemers

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i installed the VAFC and set my VTEC to 5800...i have the 3 channel monitor reading Throttle, RPMS and VTEC engagement. problem is, the vtec doesnt say its engaging until 6200....what am i doing wrong?