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Old 02-03-2005, 03:59 PM   #1
unkadave
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Default 85 GL 10 ported heads / High egt's

Just had a guy come in and said that he had his heads pocket ported? Mild port. Now his egt are to high. Would a walbro fuel pump and an Apexi Super AFC II do the trick. I have no idea what size of injectors are on the 85, 1.8, GL. Turbo is pretty small and no intercooler.

I thought putting toluene 10 gals to 12 would slow his burn rate and lower egt's.

I am building and 02 wrx to 320+ whp, but not much knowledge for Harry's 85 GL, and his egt problems.

Thanks
Dave
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Old 02-03-2005, 10:35 PM   #2
unkadave
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????? Is this the right forum
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Old 02-03-2005, 11:31 PM   #3
Scoobie Steve
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High EGT can be cause by retarded timing also. He needs to measure the air/fuel ratio and then go from there. How high were the egts?
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Old 02-04-2005, 09:37 AM   #4
unkadave
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He does not have a gauge. Did a rebuild and the "turbo side pistons were cooked". It almost sounded hike a ambient ?? temp problem. But he says going up hills causes a heat problem. Which is a classic A/F ratio indicator. He is pretty low tech, and we do not have and A/F setup.

thx
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Old 02-04-2005, 11:30 AM   #5
Calebz
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There are so many causes of temp troubles on these cars.

Cooked pistons, in my experience is likely the result of a lean condition(its common for #3 to go lean at high boost because of the crappy fuel rail design), but it could also be a predetonation problem caused by timing, carbon build up, slag from a crappy porting job.

Need to supply much more empirical evidence.

At this point, if you suspect high EGTs, you need to find a way to actually measure them.

Given that cooling problems are normal for a subaru of this age and based on my experience with them, I would start with the cooling system, unless you have evidence that its only one side thats not functioning properly. While heating up while going up hills may be a classic A/F indicator, on these cars its also a classic cooling system indicator
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Old 02-04-2005, 05:05 PM   #6
Matt Monson
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Is he running a boost controller? Overboosting those teeny little turbos will also cause high EGT's...
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Old 02-04-2005, 07:41 PM   #7
unkadave
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No boost controler. Just the ported heads. Does anybody think 2 gals of toluene per tank would help?? I run toluene in my built wrx and it brings down the EGT's. Nobody I know has tuning for an 85 (ecu reflash). I think he just needs more fuel - with the ported heads, but I'm not sure and don't know what would be the right solution.
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