I will start by saying that I have complete confidence in my tuner and am very very happy with my results. My setup is as follows.

gsr block with ctr pistons
mildly ported b16 head
jun 4 cams
jun valve springs
skunk retainers
dtr street sweeper header
apexi power fc

Now I know that the motor is over cammed however my tuner got it to run and idle pretty well. The motor made 206whp and 140 tq with a stock b16 im and throttle body. My question is this: At night the car does not want to idle. I have noticed that when I turn my lights off it runs a lot better. Is this something that can be corrected simply with a new battery or voltage stabilizer? If not can this be tuned out? In a couple weeks I will be re-tuning (ported itr manifold and a bigger throttle body) should I just wait till then to try to figure this out?

Thanks for any input!!!

 

that compression is ok for jun 4 but what about valve to piston clearence

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JUNEK9 &raquo;</TD></TR><TR><TD CLASS="quote"> Now I know that the motor is over cammed </TD></TR></TABLE>

More like over compressed............CTR pistons FTL

 

It sounds like you have a weak/bad alternator. If you have underdrive pulleys it will probably do the same. The battery could also be getting weak (being it can help stabilize the power loss at idle and make up for it at higher rpms).

 

the battery voltage do not drop that much when the lights go on. volts read 14.2 with no lights 14.1 with lights. any other ideas?