ok I Finaly got a wideband installed tonight 2:00am lol and started tunning. But I am wondering what do you think would be the best afr for me and what timming I should be running at wot my setup consistes of this

ls/vtec
stock b16a2 head and cams with adj cam gears running -2 on the exaust
ls rods and crank ctr pistons
stock honda 240cc injectors (seem to be more then enough fuel)
dc sports itr 4-1 header
93 octane street all the time and 110 at the track

I am running mostly int the 12's for a afr with a dip into the 10's when vtec enguages what should it be at wot

I had it dynoed the other day on a butt tune and put down only
173 whp and 135 wt
shouldn't I be like close to the high 190s

Ideas guys please help last day for the track is tomorrow night!

 

NA AFR should be 13.2-13.6 WOT.. your running a tad bit rich. and your dipping into the 10's? thats horrible. and i bet your gas mileage isnt to great either.

 

does it dip into the 10 only right at the vtec point? How are you controling fuel and timing?

 

yes it dips into the 10's when vtec enguages mostly I have heard this is normal but I don't know if that is right. and for some reason on top end it runs rich and loses power past 7600 I whould think it would at least make power till 8000 I am using a ostrich with crome and a innovate lc-1 wideband

 

set ur a/f ratio for 13:1 across the rpm range at WOT. first turn VTEC off in crome, tune up to 1000 rpms past ur regualr VTEC enagagement (i.e. if VTEC usually comes on at 5000 rpms, run the car at WOT to 6K rpms with VTEC disabled) once u get the a/f ratio for nonvtec part to 13:1, go back in crome and ebale VTEC. but this time set it about 1000 rpms before its supposed to come on (i.e. if vtec comes on normally at 5K, set VTEC engagement at 4K) now do WOT pulls but be prepared for the car to bog once VTEC activates due to the fact that it is set so low. then after u have a/f in VTEC set to 13:1, put VTEC back to where it normally engages. your car will feel great! when i tune Allmotor cars, i usually run timing at 0 in/hg and high rpms to about 29* overall timing.


and 173 whp for a stock LS/VTEC seems really really good to me!

btw, u wont really need 110 octane when u go to the track. just run it the way it is after u street tune it with 93 octane at a/f at 13:1 w/ timing around 29*

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted k20 &raquo;</TD></TR><TR><TD CLASS="quote">set ur a/f ratio for 13:1 across the rpm range at WOT. first turn VTEC off in crome, tune up to 1000 rpms past ur regualr VTEC enagagement (i.e. if VTEC usually comes on at 5000 rpms, run the car at WOT to 6K rpms with VTEC disabled) once u get the a/f ratio for nonvtec part to 13:1, go back in crome and ebale VTEC. but this time set it about 1000 rpms before its supposed to come on (i.e. if vtec comes on normally at 5K, set VTEC engagement at 4K) now do WOT pulls but be prepared for the car to bog once VTEC activates due to the fact that it is set so low. then after u have a/f in VTEC set to 13:1, put VTEC back to where it normally engages. your car will feel great! when i tune Allmotor cars, i usually run timing at 0 in/hg and high rpms to about 29* overall timing.</TD></TR></TABLE>

This is exactly what you need to do.