tirefryin_s10

iTrader: (3)

Honestly I would put a resistor plug back in it and turn the boost down, put a tr6 gapped at around .26 in it and see if it will make a clean hit.

Before all the bandwagon jumpers come in my car has made 1200 hp on tr6 plugs and not a single issue,granted it should have a colder plug in it but I put the exact plugs you are using in and the graph got REAL dirty and killed 100rwhp.

I have a dyno shop so I know how to operate the dyno etc and this is just what I found on my personal car. Worth a try if you ask me.

Eagle02

iTrader: (20)

At this point most anything is worth a try.

I'm pulling the trans and taking it in to my tranz shop tomorrow. He's going to check drums for me to make sure everything is OK internally with the trans.

98Z28CobraKiller

iTrader: (17)

I think that you are on the right track now.

Eagle02

iTrader: (20)

Thanks man. BTW, your car was basically the inspiration to my build

98Z28CobraKiller

iTrader: (17)

Glad to hear that I could help you burn up some $$$. LOL

Typically speaking, an ignition problem will completely kill off the car or feel like a rev limiter. I still would encourage you to do a little testing on the street in lower gear on lower boost before you pull the transmission. Just to gather a little more info and not waste time.

Eagle02

iTrader: (20)

1st gear seems to pull fine, but then 2nd and 3rd both have the issue.

Even on low boost the issue is still there.

What would you suggest to test? 1st gear pulls at something shy of WOT?

mike13

iTrader: (27)

Sure seems like a electrical problem when you say the rpm just hangs, can you datalog misfires by cylinder? Usually a misfire will be progessively worse in the higher gears as it puts more load on the motor. Also I think the 5K range is where you see the highest cylinder pressures on many motors

Eagle02

iTrader: (20)

I dont believe there is a way to log individual cyl misfires on the GEN3 setups. I'd love to hear that its possible tho if someone wants to show me how I most certainly would love to give it a shot.

A weak ground has been my fav option for awhile now. No one wants to agree with me. I've been thinking about just wiring the 4 grounds that go into the PCM straight to the batt rather than the rear of the cyl head. Whats your thoughts on that Mike13?

mparker916

900 whp... wow.. But yea I had a turbo DSM no where near the HP but I had a simmilar issue on the dyno it turned out to be the ground on the motor if I recall...

Eagle02

iTrader: (20)

See... thats exactly what I'm talking about. Seems like as soon as the electrical system gets fully loaded by injector and coil draw it falls over...

I'm going to check the grounds over tonight before I yank the trans just to be sure. I know the cyl head grounds are tight, but they COULD be shorting out (to ground???) somewhere between the cyl head and the PCM...

MIGHTYMOUSE

iTrader: (59)

how much timing?
stock computer?
what kind of exhaust after the turbo?
whats the layout BEFORE the turbo?

Eagle02

iTrader: (20)

16* @ WOT
stock computer
POST TURBO - the DP is 4", turns downwards out of the turbo runs about 12" and dumps to the ground
PRE TURBO - I have 6L manifolds into 2.5" pipe which makes a simple Y into a T4 flange

Here's a pic before the DP was completed. The DP comes down right beside the WG pipe. I'll see if I can find a better pic...

MIGHTYMOUSE

iTrader: (59)

just checkin sux

i got no real ideas other than too much lifter preload so it acts like valve float but not the springs fault

Reject

iTrader: (24)

When is the tranny coming out? Sound like its drum says no more

Eagle02

iTrader: (20)

I don't know if its the drum or not yet... still open to ideas until I get home tonight to pull the trans if nothing else better comes up.

Ryne @ CMS

iTrader: (10)

i have had nothing but problems with the non-projected tip plugs.... doing similar things on the dyno and the cars breaking up under high load.... try a set of NGK BP7EFS projected tip plugs which are the same heat range just projected tip...... other then that i would need to see the logs

Eagle02

iTrader: (20)

It feels a bit like blow out does... so I can easily see where you're going with that. Aren't those non-resistor plugs as well?

You have seen cars dyno and do this same thing due to the plugs?

Eagle02

iTrader: (20)

Also, what would you suggest the gap be set to on the BP7EFS plug?

tirefryin_s10

iTrader: (3)

I say try some plugs before pulling the trans.... simple and cheap to test.

86cutlass350

that was my first question went to was lifter per load