What I meant was we'll check the logs and mapping then go from there. If we can see a problem (like the TPS @ 60%) and can fix that, we'll go from there. 
Scotty
Scotty
Scotty's 93 GTO - it's time !
So, talking with Mike on Thursday I got tingles about the GTO and the thought of getting her up and running hard. Here is my issue:
While I haven't had the car tuned as such, way back when I did get the car tuned after I had the car built and it had been run in, the car was set to 5 psi. The tuner turned the wick up to 12 psi and we did a couple of runs. We didn't get many runs done as after about the 3rd or 4th pull (open road) I dropped a cylinder. Now the main problem I was having (and still am) is that the boost doesn't come on hard like it should. It's a fairly consistent push, like watching the speedo climb. Now, there's no smoke from anywhere. I can hear the turbo's pushing air but I'm not sure if it's leaking, as that's what it seems like. Or maybe the waste gates???? Had the car dyno'd (power run) and at 5psi, she managed 2000awhp. Tuner said the timing is hell retarded and couldn't push past 5000 rpms.
Mods:
GT2781R turbo's, Haltech E11 V2 ecu
Custom manifolds, downpipe and dumps
Custom plumbing + FMIC
Custom cold air box
CP Pistons, (8:1) Pauter rods and 2nd Gen forged crank
Engine rebuilt and machined - Stage 3 heads
Blitz DUAL Solenoid EBC
Supra fuel pump, 780cc injectors, hotwire kit, KB BAP, AEM AFPR & eK2 fuel loop
Southbend DXD-FE clutch + orthodox flywheel, 2pce CFDS, LSE SS T-Case front & mid housings + 300M 18 spline OS
Intrax lowered springs
Rear Cusco strut brace
Enkei RPF1 rims 18 x 8.5 all round
Slotted DBA rotors front, stock rears
Battery relocated to rear
Starting tomorrow, I'll be getting Brad to help me suss out my ecu and see what's what, as well as log a few runs. Maybe something will show and tell us what we need to know. (timing, air/fuel etc)
What I need to work out first, is how I can pressure test my plumbing.
Options? Mike mentioned some aluminium plate and some tyre valves since I dont have a compressor. Can I do one side at a time?
Scotty
While I haven't had the car tuned as such, way back when I did get the car tuned after I had the car built and it had been run in, the car was set to 5 psi. The tuner turned the wick up to 12 psi and we did a couple of runs. We didn't get many runs done as after about the 3rd or 4th pull (open road) I dropped a cylinder. Now the main problem I was having (and still am) is that the boost doesn't come on hard like it should. It's a fairly consistent push, like watching the speedo climb. Now, there's no smoke from anywhere. I can hear the turbo's pushing air but I'm not sure if it's leaking, as that's what it seems like. Or maybe the waste gates???? Had the car dyno'd (power run) and at 5psi, she managed 2000awhp. Tuner said the timing is hell retarded and couldn't push past 5000 rpms.
Mods:
GT2781R turbo's, Haltech E11 V2 ecu
Custom manifolds, downpipe and dumps
Custom plumbing + FMIC
Custom cold air box
CP Pistons, (8:1) Pauter rods and 2nd Gen forged crank
Engine rebuilt and machined - Stage 3 heads
Blitz DUAL Solenoid EBC
Supra fuel pump, 780cc injectors, hotwire kit, KB BAP, AEM AFPR & eK2 fuel loop
Southbend DXD-FE clutch + orthodox flywheel, 2pce CFDS, LSE SS T-Case front & mid housings + 300M 18 spline OS
Intrax lowered springs
Rear Cusco strut brace
Enkei RPF1 rims 18 x 8.5 all round
Slotted DBA rotors front, stock rears
Battery relocated to rear
Starting tomorrow, I'll be getting Brad to help me suss out my ecu and see what's what, as well as log a few runs. Maybe something will show and tell us what we need to know. (timing, air/fuel etc)
What I need to work out first, is how I can pressure test my plumbing.
Options? Mike mentioned some aluminium plate and some tyre valves since I dont have a compressor. Can I do one side at a time?
Scotty
3
41 - 60 of 237 Posts
It's Tuned to MAP, so it will withstand a huge boost leak with no issues(other than making no powa), I'm still with get it pressure tested before bothering with anything else
its definately not spark blowout. its seriously not even feeling like a turbo car. not even as fast as a stock one on stock boost. it just crawls onto boost and makes very little at that.
I reckon it definately has a manifold leak, it stinks like mad when he gets on the gas and thats when you hear the hissing sort of noise, and it definately smells liek exhuast fumes. His catch can is plumbed back into the intake pipes so definately no smell of fumes coming from that.
I suspect wastegates are opening too early or cam timing and i bet that exhuast leak is not helping but as mentioned i dont think it would cause it to be that bad.
Do you have stock cams scotty? I would also look into that tps issue and speak to a few tuners about it and even show them your logging data of a power run.
Its odd it dropped a cylinder on the initial tune. I doubt even if it has busted a ringland or piston that it would be that slow still. Ive had a busted ringland on an old engine of mine and it only dropped power abit.
So wastegates or cam timing is my call on the problem might be wrong but definately possibilites.
wastegates i assume best way to test is put a compresser on them with 14psi or so and see if they are opening, its not hard to do.
cam timing you need to remove the timing covers and balancer i think and check all the timing marks are correct.
I reckon it definately has a manifold leak, it stinks like mad when he gets on the gas and thats when you hear the hissing sort of noise, and it definately smells liek exhuast fumes. His catch can is plumbed back into the intake pipes so definately no smell of fumes coming from that.
I suspect wastegates are opening too early or cam timing and i bet that exhuast leak is not helping but as mentioned i dont think it would cause it to be that bad.
Do you have stock cams scotty? I would also look into that tps issue and speak to a few tuners about it and even show them your logging data of a power run.
Its odd it dropped a cylinder on the initial tune. I doubt even if it has busted a ringland or piston that it would be that slow still. Ive had a busted ringland on an old engine of mine and it only dropped power abit.
So wastegates or cam timing is my call on the problem
might be wrong but definately possibilites.wastegates i assume best way to test is put a compresser on them with 14psi or so and see if they are opening, its not hard to do.
cam timing you need to remove the timing covers and balancer i think and check all the timing marks are correct.
I need a boost gauge that works. Brad, can I have that autometer back?
Scotty
Brad, can I have that autometer back? Scotty
dude your car Logs boost directly into the ECU
other than that buy another ?
other than that buy another ?
Hmmm. Maybe. I dont think it does, well maybe not in psi??? I'll check.
Mike - I haven't spent too much money on this car in a while (besides fixing it) for a reason. Priorities. I also haven't needed to monitor boost as there's bugger all and the pro sport I bought died after it was installed.
Scotty
Mike - I haven't spent too much money on this car in a while (besides fixing it) for a reason. Priorities.
I also haven't needed to monitor boost as there's bugger all and the pro sport I bought died after it was installed.Scotty
Yeah, that's brilliant Joe. Hurry the hell up.
Scotty
Scotty
41 - 60 of 237 Posts
