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horrible fuel mileage (86 Turbo)
Posted 14 December 2005 - 11:53 AM
The car is:
1986 GL-10 Turbo
WRX intercooler, NOPI blowoff
straight through magnaflow exhaust
Spider intake w/K&N filter (cone)
Posted 14 December 2005 - 12:23 PM
its a hot wire maf? if so make sure the little sensing element is clean. that can cause some nasty pining/lean conditions. if its the flaper type make sure its opening smoothly. better yet get a DVOM and check the signal.
some other things.
possibly the coolant temp shorted to ground?
low fuel pressure? what presure regulator did you use when you swaped manifolds?
air leak after MAF but before turbo? look for splits in the hose lines poped off.
Posted 14 December 2005 - 01:43 PM
is causing multiple things to not work right. I have the car set to stock boost right now because even if I turn it up I don't get hardly any more power. I can crank the boost to 12 or 13 pounds (and retard the timing some more) and the car wants to go but you can feel something holding it back (timing???). Sometimes you can mash it and it will pull VERY hard but only every now and then and for a short duration at that. Don't get me wrong, the car runs great and driveability is great plus it still pulls 5 times harder than stock it just feels like it wants to run much harder and it can't.
I forgot to add to my original post, I am running a carbed block so the compression is up a little.
Posted 14 December 2005 - 03:53 PM
Does sound like you have a fuel problem though, like low fuel pressure..
You may not need to have your riming much further advanced than 10 deg with that carb block.
Im not surprised it doesn't feel right at 13psi with 8.7:1CR. That would be about the limit for your fuel system.
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