wondering whats a good amount of boost to run on my awd, with GTR transmission. right now its at 15 psi on a GTR motor/turbo/management and rx7 460s, how much higher could i set the boost without having to worry about blowing things up?
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safe boost levels with GTR tranny
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I wouldn't go more than a couple psi beyond that with those injectors no matter what gearbox. You'll melt pistons. I'm using 550's @22-23psi on a Link standalone and prolly a bomb waiting to happen duty cycle. I've blown up one centerdiff so far. The other gearbox failure I've had in this car was due to prior damage when that box was in my rallycar, so it don't count...
Driver has more to do with how much power can go through, and how long it'll last, than anything else. Keep up on synth gearlube and keep it fresh, that's about all you can do maintenence wise, the rest of it is how you drive. I never hard launch, I never speedshift, I match revs, I try and remember that it's made of glass, and I thrash on it anyway, but at least it'll last a bit longer fore it blows up. So far, the current gearbox has been putting up with the abuse for almost 4 years and 2 sets of tires.'90 AWD Protege, full GTR drivetrain swap, ~320 whp daily driver, RIP, and
'90 AWD Protege, yet another GTR swap, Open class rallycar with a Toyota GT4 gearbox swap, thus crossing the line between hobby and mental illness. And a Brabus E55 K8, removing all doubt.
http://www.wihandyman.com/forum/vbpi...?do=view&g=110
http://www.cardomain.com/ride/2599486
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Mmm... I might worry about it but only a little. I mean if you had knock that the sensor woulda noticed enough for ecu to back off timing, it woulda blown already by now. As long as plugs and piston tops ain't showing damage, I guess I wouldn't worry.
But if you turn up the boost even a tiny bit all that goes out the window. Go find one, they can't be all that expensive.'90 AWD Protege, full GTR drivetrain swap, ~320 whp daily driver, RIP, and
'90 AWD Protege, yet another GTR swap, Open class rallycar with a Toyota GT4 gearbox swap, thus crossing the line between hobby and mental illness. And a Brabus E55 K8, removing all doubt.
http://www.wihandyman.com/forum/vbpi...?do=view&g=110
http://www.cardomain.com/ride/2599486
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Best way to avoid driveline shock is with a fulldisc sprunghub clutch. That and not giving it too much torque, which a bigger turbo will be only too happy to provide. Once the new ecu is installed in the rallycar and the maps are tuned and happy as can be with the 34mm restrictor in place, I fully intend, in the name of science, to remove said restrictor temporarily and make a map that puts out whatever it can get, to find the safe limits of 550cc injectors when the intake and exhaust have been opened up to reasonable maximums with a gt28r. Cuz I won't be worried about blowing up that gearbox!
I actually doubt if it'll be any faster than my street car which is pretty much right at or slightly beyond the theoretical limits for 550's. Injectors will be the limiting factor, and they're the same size. I'm almost curious enough to throw some 750's at the rallycar and make a map for them...hee hee hee'90 AWD Protege, full GTR drivetrain swap, ~320 whp daily driver, RIP, and
'90 AWD Protege, yet another GTR swap, Open class rallycar with a Toyota GT4 gearbox swap, thus crossing the line between hobby and mental illness. And a Brabus E55 K8, removing all doubt.
http://www.wihandyman.com/forum/vbpi...?do=view&g=110
http://www.cardomain.com/ride/2599486
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^^ do it, you won't!
I'm planning on running 550's with my T3 60 trim with the .63 exhaust side on a tubular ram horn @10 psi with megasquirt. (engine has high miles and I don't want it to pop on me)
I am still debating on going with 3" exhaust right off the bat. I'm running a GTR intake as well. This is all going through a BG GTX trans in my Festiva.2011 BMW 128i 6 Speed Manual -- dd
1990 Protege 4WD 5 Speed
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