Engine/Transmission (1994 - 1998) 3gsk = Egt

[AWray]

I installed my 3GSK, #10 plate, aFe intake, 4" turbo back exhaust. My pyro is installed pre-turbo. Now if I stand on it from a start, my EGT will push past 1400. What's up? I know I'm pushing a stock turbo, but do I need a bigger turbo before I go to delivery valves and injectors?

 

[JoshPeters]

Yes. I'd check your timing. You do seem a bit on the hot side of things. How much boost?





Josh

 

[JGheen]

Timing is a good place to start. What size turbine housing are you currently running? If it is the stock 12cm2 or smaller, then yes you want at least a 14cm2 and probably no bigger than a 16cm2 due to the turbo lag the 16 will cause. Also, how far forward is the #10 set at?

 

[SMorneau]

1400 sounds about right. The higher RPMs do tend to run hotter combustion temps. A #11 plate will fuel even more in the upper RPM range so you would have even more heat.



Bigger turbo or twins. IMO, the 16cm housing will not do much for you especially if your just blasting around town where the 12 cm housing spools faster. The lag isn't bad with a 16 but it just doesn't do that much to lower EGTs.

 

[Jim Fulmer]

Just something to think about, I dropped the EGT's on a 97' 5 Speed with 370's and a plate about 400 degrees with a 16 housing and Water/Methanol... ... . power is at 432 fuel 496 water..... 200k stock 35 turbo... ... it can be done.



Jim

 

[AWray]

I know the timing needs to be bumped. I have not had the timing adjusted since I bought the truck 9 months ago.



I can make about 30 psi max.



The #10 plate is about 1/4" or so forward. It seemed to be pretty far forward before I adjusted the stocker.



The turbo is a WH1C with the stock 12cm housing.



Any other suggestions?

 

[Lsfarm]

Adjust the plate

I'd just slide the plate back about 1/8" from full forward and give it a try. It is free, and can be restored to it's current position if you don't like the way it runs pulled back. Lots of times the full forward position creates lots of heat and very little extra power over just setting the plate about halfway forward from stock position.



I'd get the timing set, and then assess just how often you see EGT's over 1300* during day to day driving. The ocassional blast over 1300* isn't death to the engine, but sustained high EGT's are. Unless you are towing then it is pretty hard to use enough power to get above 1300* for any length of time before your road speed gets way up there.



Give it a try and let us know if it helped.



Greg L.