Help me get my idle right!

[acidcrashdburnd]

2005 GP L26, Gen V, L32 heads. S2X cam.

The car was dyno tuned with a short street tune after that and runs GREAT but has trouble idling, (surges and stalls out at every stop) I has the idle set to 950 and it was fine but I think that is a bit high. Id like it around 750-800 if that is possible. Any tips or ideas I should give my tuner? I am going back up there this weekend for him to try and sort it out...

 

[ericspecullaas]

sounds to me it needs someone that has tuned GP's before

 

[acidcrashdburnd]

sounds to me it needs someone that has tuned GP's before

no knock and 25mpg highway, Id say hes 90% there. He's a specialist with German cars and LSx cars. He actually tuned the car that holds the time record for the fastest stock bottom end LSx car.

 

[dsmuts]

25 mpg? It should get better than that. You sure you don't have a vacuum leak?

 

[acidcrashdburnd]

25 mpg? It should get better than that. You sure you don't have a vacuum leak?

Highway speeds around me range 80-85. The boost gauge seems normal for vacuum. Butt ill give it the old carb cleaner test.

 

[GTPpower]

Also sounds to me like you've got a vac leak.

 

[acidcrashdburnd]

Also sounds to me like you've got a vac leak.

The tuner said my IAT numbers were off and that it could be resolved by drilling a small hole in the throttle plate. Which I did which seems to have helped a bit. Would my PCV being blocked by the intercooler core have anything to do with this?

 

[darkhorizon]

s2x is going to push a bunch of air at idle, and probably max your trims out. You also will want to run ~40 degrees of timing at idle.

 

[acidcrashdburnd]

s2x is going to push a bunch of air at idle, and probably max your trims out. You also will want to run ~40 degrees of timing at idle.

I was going to go back up there this week after work, but I ordered the Devils Own Meth kit.. Ill add that, put my 3in pulley on and then go back up there.