Safe boost levels for 15G turbos, stock map.

[Unlogic]

Yes, because it draws the same amount of current as stock solenoid so you dont risk frying the circuit in the ECU.

[Jimvr4]

It also looks stockish

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[Unlogic]

Good point!

[Beau_Jester]

I've been running 17psi with 93 octane, a cheap 3sx manual boost valve, stock injectors, stock ECU without any A/F correction in my TT fwd base 3kgt. My only mods are an Aeromotive boost compensated FPR, 15Gs, and methanol injection starting at 12psi. My AFR under boost is 11.0. I am pretty happy with the way it is running. Before this I was using an SAFC and 450cc injectors. Honestly, I don't see much difference in performance at this level of boost. I never ran any higher than 17psi so for me the 450cc aren't really needed. When I need to pass emissions, I just go back to the stock boost valve.

[akotten]

I've been running 17psi with 93 octane, a cheap 3sx manual boost valve, stock injectors, stock ECU without any A/F correction in my TT fwd base 3kgt. My only mods are an Aeromotive boost compensated FPR, 15Gs, and methanol injection starting at 12psi. My AFR under boost is 11.0. I am pretty happy with the way it is running. Before this I was using an SAFC and 450cc injectors. Honestly, I don't see much difference in performance at this level of boost. I never ran any higher than 17psi so for me the 450cc aren't really needed. When I need to pass emissions, I just go back to the stock boost valve.

Great insight, thank you. Except for one big thing....you're using methanol injection. I don't know what concentration or nozzle size you're using, but this certainly helps raise the ceiling of safe boost levels. 👍


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[Beau_Jester]

I am currently using the coolingmist.com stage one kit. I use the windshield washer reservoir to hold the 50/50 water methanol and it can clean my windows You can actually mix methanol or "heat" with your washer fluid if you wanted. I use distilled water, though.

[akotten]

I am currently using the coolingmist.com stage one kit. I use the windshield washer reservoir to hold the 50/50 water methanol and it can clean my windows You can actually mix methanol or "heat" with your washer fluid if you wanted. I use distilled water, though.

Be careful with that. I had a similar setup on my BMW 335i. The washer bottle seals failed and leaked methonal near the exhaust. Created a $5000 fire while on a road course.


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[murphys_law]

Be careful with that. I had a similar setup on my BMW 335i. The washer bottle seals failed and leaked methonal near the exhaust. Created a $5000 fire while on a road course.


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A 50/50 mix isn't really any different than the -30 washer fluid. If you go Over that then I'd worry, otherwise it's just basically washer fluid which lives under the hood of almost every car.


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[akotten]

A 50/50 mix isn't really any different than the -30 washer fluid. If you go Over that then I'd worry, otherwise it's just basically washer fluid.


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True. Still kindve flammable but not nearly as a 75/25 mix would be. Learned that one! 😑


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[BostonRTTT]

Pretty sure 15G's flow way more air at the same PSI as 9bs. Meaning, 15PSI might not be safe. Read a lot about people getting knock at 10-12psi on stock fuel system.