Dumb turbo question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

glorydays · 10-14-2013, 10:51 PM

I have a question which, in a way, i know the answer to but i guess im just looking for conformation. Im putting together a turbo kit and will be running an external wastegate with a ridiculously low amount of boost, 2.17psi spring controlled, and would like to know if our ecus can tolerate even this low amount of boost without a tune? this car will almost never be tracked and honestly will only be boosted for shits and gigs. If it matters, i only use 93 octane, and i live in the very cold upstate Ny.

nelsmar · 10-14-2013, 11:40 PM

No. And it is a waste of time and money invested to only put "2.17psi". You will need to re-tune the ecu. Sure it may be "close" in the AFR tables but it is not worth the effort for the chance of a lean spot and advanced timing issues.

God forbid you are running an internal wastegate and get boost creep to 3-4psi in which you will have a major tuning issue.

mike the snake · 10-14-2013, 11:49 PM

If that's all you're looking for, why not go for the electric supercharger?

ft_sjo · 10-15-2013, 02:57 AM

No turbocharger is happy at that boost level either.

glorydays · 10-15-2013, 07:25 AM

Quote:

Originally Posted by nelsmar

No. And it is a waste of time and money invested to only put "2.17psi". You will need to re-tune the ecu. Sure it may be "close" in the AFR tables but it is not worth the effort for the chance of a lean spot and advanced timing issues.

God forbid you are running an internal wastegate and get boost creep to 3-4psi in which you will have a major tuning issue.

Ok thanks. The 2 psi is temporary of course. Up here there aren't many tuners and even less dynos so I was hoping I could at least get things installed and drive it to a tuner and bump it to 4-5psi.

Sportsguy83 · 10-15-2013, 08:40 AM

Quote:

Originally Posted by glorydays

Ok thanks. The 2 psi is temporary of course. Up here there aren't many tuners and even less dynos so I was hoping I could at least get things installed and drive it to a tuner and bump it to 4-5psi.

You can turbo charge a car and never go into boost. Just cruise on it, never WOT, light partial throttle.

The issue you might encounter is the added run length of intake piping/ change in MAF piping will be an issue idling the car because you will have no tune. The shop you plan on tuning with should be able to send you an e-tune for the turbo and then dial it in live.

10-14-2013, 10:51 PM	#1
glorydays Remember me? Join Date: Dec 2011 Drives: BRZ Series.Blue Location: Honolulu, HI Posts: 483 Thanks: 259 Thanked 105 Times in 68 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Dumb turbo question I have a question which, in a way, i know the answer to but i guess im just looking for conformation. Im putting together a turbo kit and will be running an external wastegate with a ridiculously low amount of boost, 2.17psi spring controlled, and would like to know if our ecus can tolerate even this low amount of boost without a tune? this car will almost never be tracked and honestly will only be boosted for shits and gigs. If it matters, i only use 93 octane, and i live in the very cold upstate Ny.

10-14-2013, 11:40 PM	#2
nelsmar Senior Member Join Date: Feb 2013 Drives: FR-S Location: Phoenix Posts: 2,605 Thanks: 733 Thanked 2,361 Times in 1,031 Posts Mentioned: 345 Post(s) Tagged: 3 Thread(s)	No. And it is a waste of time and money invested to only put "2.17psi". You will need to re-tune the ecu. Sure it may be "close" in the AFR tables but it is not worth the effort for the chance of a lean spot and advanced timing issues. God forbid you are running an internal wastegate and get boost creep to 3-4psi in which you will have a major tuning issue. __________________ When I grow up, I wanna be God. My flickr - *Canibeat* Local magazine scout Old Setup: Vortech Supercharged 360WHP/262WTQ @ 11.5psi My build thread - WTF happened to nelsmar's car thread

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10-14-2013, 11:49 PM	#3
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	If that's all you're looking for, why not go for the electric supercharger?

10-15-2013, 02:57 AM	#4
ft_sjo Banned Join Date: Oct 2012 Drives: GT86 Location: The Motherland Posts: 1,398 Thanks: 140 Thanked 473 Times in 271 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	No turbocharger is happy at that boost level either.

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