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GT28R Installed. Pics.

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Discussion starter · #45 ·
peppy -- i've been running with a neuspeed 1.1 bar chip and the GT28R, and I just keep it below 4krpm, and make sure it doesn't put out more than 1.1 bar. The only thing you need to worry about is running out of injector at high rpm (high power) and running lean and detonating, because the BT is actually easier on the engine before it spools!
 
#47 ·
PassatX said:
peppy -- i've been running with a neuspeed 1.1 bar chip and the GT28R, and I just keep it below 4krpm, and make sure it doesn't put out more than 1.1 bar. The only thing you need to worry about is running out of injector at high rpm (high power) and running lean and detonating, because the BT is actually easier on the engine before it spools!
Click to expand...

seriously....would you want a car that you can't bring up more than 4K? that is just plain stupid. if that is the case why bother with the GT series if you can't get the full potential and possibly blow your engine.....?

seems like you should do it right and get the proper software.
 
#49 ·
Passat X- do not try and tune chipped software, the logs will show its not good. many people that say that there car runs great on chipped ecu have never driven a car with proper BT software,
you should prolly stay away from atp software, there havent been to many good reviews of that yet, one guy on vortex has it and it worked pretty good for a few weeks and then started getting out of whack.
if you can get revo so you can use lemmiwinks, upsolute has a spotty history with drive by wire software.
also, those siemens injectors are prolly a better idea than greentops, they have a stock like spray pattern and are faster to react when you decelerate.
and hate to say it, but since you have an exhaust leak you should prolly just go switch to the log manifold or a pag-parts if they have it for passats. my manifold-turbo adaptor leaked profusley and never stopped no matter what i did, i even wasted money on a new one, reason is that one of the three big studs falls on the gasket seal line. the log manifold will take away so much headache, only thing is you have to get a new DP as well, however, these parts will make your power goals easier to attain.
if you want to be really safe and maybe floor it a couple of times you could disconnect your n75 (leave the harness plugged up though) and run a vacuum line directly from your intake manifold to your wastegate port, if its like mine and many other it should be set at 12.5psi.
 
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#52 ·
evilvariant said:
seriously....would you want a car that you can't bring up more than 4K? that is just plain stupid. if that is the case why bother with the GT series if you can't get the full potential and possibly blow your engine.....?

seems like you should do it right and get the proper software.
Click to expand...
DO IT RIGHT...use a BT software. Or post in a few months how your engine is blown..which i will love to read while i have a beer.
 
#53 ·
You are missing my point. I have to bolt on everthing BEFORE I take it to get tuned. I cant just show up in their parking lot and use it as a garage then give it to them to tune:crazy: All I wanted to know was WHAT I am I able to just bolt on to get it there safely:confused:
evilvariant said:
seriously....would you want a car that you can't bring up more than 4K? that is just plain stupid. if that is the case why bother with the GT series if you can't get the full potential and possibly blow your engine.....?

seems like you should do it right and get the proper software.
Click to expand...
 
#55 ·
peppy said:
You are missing my point. I have to bolt on everthing BEFORE I take it to get tuned. I cant just show up in their parking lot and use it as a garage then give it to them to tune:crazy: All I wanted to know was WHAT I am I able to just bolt on to get it there safely:confused:
Click to expand...
you should be able to bolt on everything before bringing it to the tuner, so long as you drive it without boost. the only thing i might hold off on is the larger MAF and the injectors.
 
Discussion starter · #58 ·
Peppy -- You should be safe to drive a few miles to a tuner as long as you don't get too crazy with the throttle, and limit your engine speed. Monitor boost. 15psi of boost at 4krpm with a GT28R or K03 or GT70 is STILL 15psi on intake manifold pressure and while backpressure (because the bigger turbine is more efficient) is reduced with a larger turbine, you may experience a 3-5% increase in volumetric efficiency (3-5% increase in airflow), with a MAF equipped car you won't run lean, the ECU will compensate. The only problem will arise when/if you reach max fuel injector duty cycle (or a pulse duration limit), but it is proportional to engine power (assuming constant BSFC). So, at 4krpm, a K03 chipped car at 15 psi of boost will make 200ft-lbs (give or take) and 200*(4000/5250)= 152hp @4krpm. A GT28R equipped car at 4krpm, 15psi of boost will make 5% more torque (max), 210ft-lbs, so 210*(4000/5250)=160 hp. You can bet your ass the stock FI system can handle 160 hp. I wouldn't recommend driving your car around for extended periods of time, as you may inadvertantly revv it to oblivion, as the wastegate setting on the BT may force you to run 15psi of boost at 6000 rpm (the NH75 valve could be wide open but if the wastegate doesn't open till 15psi manifold pressure, it'll run that all day long!) The K03 stock wastegate setting is much lower, so the ECU can get the desired 7psi or whatever its looking for by opening the NH75 valve. I certainly will be getting tuning done in the very near future, and i will not be revving my car pass 4krpm until that time. The reason is because I, much like you, wanted to install my turbo before bringing it to a tuner and not try to do the swap in parking lot somewhere or pay someone else to do it. Don't install the bigger injectors or bigger maf before getting software to compensate for those changes. The car will idle fine, but once to you exceed a certain throttle position increase rate or engine speed the car goes into its open loop calibration and assumes that the MAF and fuel injectors are appropriately sized.

And no it is NOT 100% safe, but it is do-able.
 
#60 ·
Ok, maybe I am just hardheaded but If I run 15psi on stock, what will it be if I run 5-10psi on the BT? Still a problem to get it just to the tuners?

Evilvariant, how did you do around getting your tuning done?

PassatX, thanks for the explanation
 
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