well were running 14lbs with a 67/76 turbo making 340hp fully built ext..
the car runs good but when we hit v-tec it falls on its face for sec then kicks back in, pulled the coil out looked a little burnt up.

 

replace the coil then try again... isnt that obvious if its burnt up?

 

well yes but its burnt for a reason. u could see discolering on the plastic

 

whats your oil pressure when vtec kicks in? and whats your ignition at before vtec and after vtec? and yea whats your afr?

if u know the engine is strong in the high cam then its most likely a tuning issue or possible a vtec soleniod.....i would chekc the soleniod resistance just for insurance i remember the helm says anything from 15-30 ohms mean the solenoid is still good!

hope this helps

 

oils around 80, afr 12.5, timing 18degrees.

if it was v-tec u woouldent think it would fall so hard then kick in

 

maybe it's not getting enough fuel when vtec kicks in?

 

stock honda ignitions (in good working order) can support >400who

 

its getting enooooought fuel af is 12.3 at v-tec.

yes it might be able to suport 400. but if spark is getting blown out it aint doin nothing

 

have you tried a tighter gap on your plugs?

What is your gap at right now?

 

ya we went down to 025.

its obviausly the coil was suffering, but thiers a reason for that.
so its just not enough. tomorow we will order aem or msd see witch one i can get tuesday, but i want the aem so i keep things the same

 

did u try adding a little of timing before vtec? if it falls then it oculd be a timing thing....i have a feeling an MSD will fix the problem, but u wanna know why the stock ignition is acting wierd as the guys said stock ignition is good and as u said 340hp is nothing for the stock ignition

check the plugs after the engine falls before vtec kicks in....run until it get to the point where it falls, shut engine immediatly and take the car out of the road and check each plug color....and yea which temp of plug did u put?

another note if this T67 turbo is on a b16 then i hear that a b16 with T67 is really boggy in the spool to full boost....well dont take me for this, cause i never tried a T67 but i wanted to share i heard....when was the last time u did a valve adjustment?

 

well we tried the timing thing just got worse.
the plugs are 7,s
also its a gsr motor, & its laggy on on spool but even with not being able 2 tune it good we are making 8psi at 4000rpm.
i have a felling it was just the coil starting to go then it got worse maybe just its time to go dont know but up grading will def rule that out

 

let us know then...am interested to know how you fix this problem...do u mind askin why u choose 7's instead of 8's?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ALL IMPORT &raquo;</TD></TR><TR><TD CLASS="quote">oils around 80, afr 12.5, timing 18degrees.

if it was v-tec u woouldent think it would fall so hard then kick in</TD></TR></TABLE>

When vtec kicks in you want the a/f to dip to high 10's and then back into mid 11's Because your instantly adding alot more fuel and air with the valves opening it likes to be somewhat rich on the change over. At least from my experience tuning thats what ive found.

Swap out your coil with someone else to rule that out as well. What are you running for managment? Post your map and ill take a look at it. What rpm are you kicking vtec in at? If its to early this will also cause it to fall on its face and then eventually kick back in

12.5 A/F is a bit lean, yes you can run it like that but your on the ragged edge in my opinion. I would phatten it up and you should see some improvment on performance. The vtec likes to be a little rich on these motors.

7 plug should be fine for lower boost applications, also try gapping down your plug. possibly to a .25 not sure what your running now. Put a fresh set of plugs, make a hard pull and turn the car off, check your plugs an dmake sure the ground strap is two different colors and is split 50/50 if not then your plugs are to hot and get your self a set of 8's

 

7s will work for 400whp

aem all the way for managment.

12.5 is lean but like a said we were in the process of tuning no our 3rd run.so thats why it was higher. but that wouldent cause the proooblem.

we gapped down to 25.

i orders msd ss coil new rotor & cap. will be getting aem ignition moduel soo. but the coil should take me 2 400whp.
the car will get put back together tommorow & dyno so ill post up the results.