Hey everyone,

Car: 94 GSR.
Mods: AEM intake, 4-2-1 headers, high-flo cat, Apex'i exhaust

Trying to figure out if it would be beneficial for me to get a VTEC controller, and if I did, if I would be able to tune the thing myself (I don't have much experience with that kind of thing) or if someone on this forum could help me tune it over the internet if I got it.

 

If you have a vtec engine, it will help you control your a/f ratio and you will gain hp. You need to go to a auto shop with a dynometer for adjustment. Do a search...

 

woha woha woah
lets get more specific here

only a VAFC will allow air and fuel tuning along with vtec

a fields type vtec controller will NOT.

and IMO vtec dosent need to be touched till cams are upgraded, the honda engineers just didnt pull a number out of the air for a vtec crossover point, its sitting at the near perfect balance for power.

 

Well the lower VTEC crossover on the GSR was intended to work well with the dual runners on the intake manifold. So after upgrading to a single runner manifold, a higher VTEC crossover is more suitable. On a dyno you can find your best VTEC crossover point. You can also street tune it with a wideband o2 sensor if you can get a hold of one.

 

best advice: have a professional tune a vafc for you

other advice: use a pyrometer(egt), and a split second a/f and have plenty of knowledge about your ecu, fuel, timing and the motor and you theoretically could tune it yourself.

 

just run it on the dyno with no VTEC then run it with VTEC the whole time then look where they cross over each other and set that to where you want it to switch.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kamin &raquo;</TD></TR><TR><TD CLASS="quote">

a fields type vtec controller will NOT</TD></TR></TABLE>

actually Field SFC VTEC controller will do fuel adjustments in 1,000 rpm increments