Turbo Drama...
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Joined: Oct 2005
Posts: 245
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From: Troy, Ohio
Car: 1987 Trans Am
Engine: 383
Transmission: TH400
Axle/Gears: 9 bolt 4.11
Turbo Drama...
Ok a couple days ago I took the car to the local drag strip. I put 3 passes on the car which were all a dissapointment. Before the car would jump to 7psi and build boost strong and steady to 15 psi. when I made my passes it didnt build but 7psi and it took half the track to build that and got 3 consecutive 13.6's @ 104, 104, 105. The car was not pulling near it's potential which I have seen on the street prior to taking it to the track.
So I screwed with the car today and came up with a couple things
1st I have a definite miss. which seems to be on the right bank(TURBO HEADER SIDE) which is a complete PITA to swap the wires and plugs on that side. I have to pull off pretty much everything to replace them. This will make the 3rd set of wires on this.
2nd I tightened up the wastegate but it is still struggling to pull boost, which I think points back to a dead cylinder, it did this same thing the last time the plug wires went bad.
I also completely disconnected my meth to eliminate that possibility.(gunners idea, which was a good one)
So if I am correct on this then my 13.6 passes was with a dead cylinder and a struggle to build boost. At this point I am very optimistic on getting a decent 12 on street tires. I am however probly not going to have time to fix it this coming week until Friday on my day off. So as of now I will not be able to take it back to the track for 2 weeks.....
Do you have any thoughts on this? Does a dead cylinder normally have such an effect on building boost?
The last time I had a miss I had issues with boost but the wires on the car probly only have 300 miles on them so I just counted that problem out...until I had it running at the house and noticed it was running a lil rough and I could hear it pop thru the cutout a bit. so I started pulling plug wires off and all but 1 plug wire changes the Idle, meaning that the cylinder is dead.
So I screwed with the car today and came up with a couple things
1st I have a definite miss. which seems to be on the right bank(TURBO HEADER SIDE) which is a complete PITA to swap the wires and plugs on that side. I have to pull off pretty much everything to replace them. This will make the 3rd set of wires on this.
2nd I tightened up the wastegate but it is still struggling to pull boost, which I think points back to a dead cylinder, it did this same thing the last time the plug wires went bad.
I also completely disconnected my meth to eliminate that possibility.(gunners idea, which was a good one)
So if I am correct on this then my 13.6 passes was with a dead cylinder and a struggle to build boost. At this point I am very optimistic on getting a decent 12 on street tires. I am however probly not going to have time to fix it this coming week until Friday on my day off. So as of now I will not be able to take it back to the track for 2 weeks.....
Do you have any thoughts on this? Does a dead cylinder normally have such an effect on building boost?
The last time I had a miss I had issues with boost but the wires on the car probly only have 300 miles on them so I just counted that problem out...until I had it running at the house and noticed it was running a lil rough and I could hear it pop thru the cutout a bit. so I started pulling plug wires off and all but 1 plug wire changes the Idle, meaning that the cylinder is dead.
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