Howdy ya'll i have a little question for you i have a 04 S2k i have a top fuel intake, bored TB, spoon header, test pipe, HKS exhaust i dynoe'd at 206 whp and looking for more power so i just picked up up a VAFC and a AEM wide band i wanna know what the + and the - means on the VAFC and what the air/fuel ratios should be for all motor? thank you!

 

The (+) and (-) is the the amount of fuel added or removed... The units are percent..

For the most reliable power, you want to shoot for an AFR no leaner than 13.5.. The leaner it is, the more power you make, but as a result you sacrifice reliability...

Put it on the dyno and tune it...

 

so right now with the sfuff i have on it i would wanna lean it out a tiny bit correct? is there anything i have to mess with as far as timming goes?

 

A VAFC is only as good as it's tuner.

It's great that you picked up a wideband, but I would really recommend you find an experienced tuner in your area to do the tune. Post in your local forum here on s2ki and ask for a tuner recommendation.

It really isn't just about trying to lean it out as much as possible...I've seen a very skilled tuner take an nice lean tune, add some fuel back in the right places and make more power.

 

I agree... I only tuned mine because I wanted to learn how to tune...

https://www.s2ki.com/forums/index.ph...&f=22&t=533022

 

There is no timing control. You can change vtec to 5700(good for most AP1's). 13.2 would be a perfectly safe a/f ratio for you without sacrificing anything. The ecu will fully control timing for your minor adjustments.

 

alright thanks everyone i appreciate it! yuo guys rock!

 

You should really find a manual and read it. This could save your engine's life.