Please Help, Turbo Ii's Inconsistency
#1
I was just wondering if anyone could help me out with this weird problem regardless of temperature, the Turbo II's seem to run different on a daily basis. Most of the time it runs great but some days it seems more like it lacking 50 hp, even with the same boost on an aftermarket gauge.
The mods are a Street Ported Engine, Racing Beat Full Turbo back exhaust, cone air filter, HKS blow off valve, The boost is retarded with a controller through the blow off valve to keep it under the shut off limit for the ecu.
Please help, and thanks in advance.
The mods are a Street Ported Engine, Racing Beat Full Turbo back exhaust, cone air filter, HKS blow off valve, The boost is retarded with a controller through the blow off valve to keep it under the shut off limit for the ecu.
Please help, and thanks in advance.
#2
Originally Posted by '79rx7' date='Dec 17 2003, 10:53 PM
The boost is retarded with a controller through the blow off valve to keep it under the shut off limit for the ecu.
that is totatly not good. you just have a huge vac leak under boost. I'm surpised it runs at full thottrol.
#3
It's not a vacuum leak cause it's only open under full boost it's just a mechanical boost controller, trust me that is not the problem or even part of it. Beside this problem has occured on more then one of the turbo II's that I've owned.
#6
dude you are totaly screwing your car up with that......
fix that first. then see if the other problem is still there.
I'm guessing that when the car runs fine that vent is closed. and as soon as it opens the car runs like crap.
it's going to run super *** rich when it vents boost out because the ecu thinks all that air went into the engine.
also you are spinning the crap outa your turbo. which will cause much more wear on it and cause the intake temps to go much higher.
if your boost is too high for your likings. there is only 2 things you can do. one is to port the wastegate. and the other is to make your intake or exhuast more restrictive to reduce creep. bleeding off boost is not one of the choices.
fix that first. then see if the other problem is still there.
I'm guessing that when the car runs fine that vent is closed. and as soon as it opens the car runs like crap.
it's going to run super *** rich when it vents boost out because the ecu thinks all that air went into the engine.
also you are spinning the crap outa your turbo. which will cause much more wear on it and cause the intake temps to go much higher.
if your boost is too high for your likings. there is only 2 things you can do. one is to port the wastegate. and the other is to make your intake or exhuast more restrictive to reduce creep. bleeding off boost is not one of the choices.
#7
Originally Posted by '79rx7' date='Dec 21 2003, 08:04 PM
it's vented to the atmosphere, you can't vent back to the intake it would defeat the purpose of retarding the boost. Sometimes though it does cut out at 6500 rpm.
I agree with Scott, remove that thing, and sell it to someone with a supercharger.
#9
Originally Posted by '79rx7' date='Jan 1 2004, 01:17 AM
Thing is, it'll run great some days then other's it won't, and this problem has occured on more than one car, with or without the boost retarded.