Need Help PLEASE!!!
09-28-2013, 10:26 PM
#1
Need Help PLEASE!!! I recently took my project to the dyno to get tuned and I am really disappointed with the outcome. I think there is a problem with it and can not pin point it. Combo consists of a 01 5.3 with a mp70mm turbo with 15lbs of boost. 02 Z06 cam, truck intake, stock 862 heads, Bryan Tooley dual valve springs, 80lb injectors, fast fuel rails, -10 supply line from sumped tank and a1000, -8 return with boost referenced regulator. Fuel pressure is staying consistent throughout the pull at 10.8-11.0. PCM is a 411. He only put 14 degrees of timing into it. ITs going through a th400 with a transking 3000 stall and 3:27 gears. I have double checked that the cam gears are lined up correctly. Like I said I can not think of anything that would make the graph look like this other than blowing through the converter. I am seeing right 13 lbs consistently through out the pull. No slipping is evident in the tranny. Fluid looks brand new in the tranny also. Any and all help or ideas is greatly appreciated. Thanks a lot
09-29-2013, 04:13 AM
#2
I recently took my project to the dyno to get tuned and I am really disappointed with the outcome. I think there is a problem with it and can not pin point it. Combo consists of a 01 5.3 with a mp70mm turbo with 15lbs of boost. 02 Z06 cam, truck intake, stock 862 heads, Bryan Tooley dual valve springs, 80lb injectors, fast fuel rails, -10 supply line from sumped tank and a1000, -8 return with boost referenced regulator. Fuel pressure is staying consistent throughout the pull at 10.8-11.0. PCM is a 411. He only put 14 degrees of timing into it. ITs going through a th400 with a transking 3000 stall and 3:27 gears. I have double checked that the cam gears are lined up correctly. Like I said I can not think of anything that would make the graph look like this other than blowing through the converter. I am seeing right 13 lbs consistently through out the pull. No slipping is evident in the tranny. Fluid looks brand new in the tranny also. Any and all help or ideas is greatly appreciated. Thanks a lot
09-29-2013, 08:30 AM
#3
The one pull at 464 the tuner had me connect the vacuum line for the wastegate to the top nipple. This resulted in about 20 lbs of boost or so. Then he realized I had it correctly run the first time. Waste gate vacuum line is connected to the cold side pre throttle body, and the bov is right after throttle body on the intake. The others I think were driveability tests of some sort. I wish I had another graph to represent 5-6 pulls on the same graph under the same conditions.
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09-29-2013, 09:39 PM
#8
Launching!
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Your tuner doesnt sound like much help.
Also that MPT70 has a 64mm turbine wheel which is way to small. How do I know because I have the same setup as you cept im 76mm and I made 418 whp at 14 psi tq was 586, but after 6k it dove str8 on its face.
Also that MPT70 has a 64mm turbine wheel which is way to small. How do I know because I have the same setup as you cept im 76mm and I made 418 whp at 14 psi tq was 586, but after 6k it dove str8 on its face.