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Old 06-18-2019, 04:30 PM   #1
PyroguyFTW
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Default Boosting with a MAP/MAF on 2010+ cars.

I got kinda drunk the other night and started to take measurements on my '12 and found out that it looks like a few parts(turbo) I've got lying in the garage would fit with some very minor work.

After checking my MAP sensor with a scanner with a scan tool, it looks like it can read up to 19.9psi. I don't know if that's the limit of the sensor, or the limit that the ECU can read. Does anyone have experience messing around with N/A ECUs to read some boost? My car has a MAF and a MAP, so I assume it would be a bit easier to tune than a straight MAP car, even if done by eliminating the MAP altogether.

5psi is better than nothing, but honestly I'd rather just skip the effort of finding a tuner if all I'll get is 5psi.
Thank you for your help!
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Old 06-21-2019, 09:23 AM   #2
pcampbell
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Default Boosting with a MAP/MAF on 2010+ cars.

I have no idea about 2010 cars. The first thing would be see if you can download your ROM with a Tactrix cable. Is this an EcuFlash capable car? Just google it. Or look on romraider for Stock rom list for your car.

On a maf car the map sensor doesnít do all that much. The map basically can make adjustments based on your altitude or barometric pressure.

Last edited by pcampbell; 06-21-2019 at 11:16 AM.
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Old 06-22-2019, 05:30 AM   #3
pcampbell
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Default Boosting with a MAP/MAF on 2010+ cars.

Did you figure it out??

1 thing. The limit might be 19.9 absolute psi which is 5 psi above atmospheric pressure. I.e. 14.7 psi. The map sensor is not a big deal to change out. The na sensors are known to max at at 5 psi relative (that is the number we see at 5 pounds of boost).

Were you measuring manifold relative pressure or absolute?

Last edited by pcampbell; 06-22-2019 at 05:37 AM.
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Old 06-27-2019, 07:34 PM   #4
PyroguyFTW
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Sorry for the late response. It's been a busy week at work. I just unplugged the sensor and blew air into it with a compressor, so absolute.
The ECU's capability was my big concern. While tuning it, I was thinking that I could get a tuner to plug in and set a sort of "boost cut" when the MAP picks up more than around 22 psi absolute, but after speaking with the only tuner around and being talked down on before I could even explain that I knew what I was talking about, I don't think I'm gonna be going the turbo route.

I can get the hardware done, but I can't tune, and if the only guys around with a decent reputation wanna talk down on a potential customer before they can even finish a sentence, I don't particularly trust them to tune anything past a wrx with an intake and exhaust.

I realize how petty this sounds, but frankly it's a poor way to treat a potential customer.
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Old 06-27-2019, 07:35 PM   #5
Fahrezz
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Quote:
Originally Posted by PyroguyFTW View Post
Sorry for the late response. It's been a busy week at work. I just unplugged the sensor and blew air into it with a compressor, so absolute.
The ECU's capability was my big concern. While tuning it, I was thinking that I could get a tuner to plug in and set a sort of "boost cut" when the MAP picks up more than around 22 psi absolute, but after speaking with the only tuner around and being talked down on before I could even explain that I knew what I was talking about, I don't think I'm gonna be going the turbo route.

I can get the hardware done, but I can't tune, and if the only guys around with a decent reputation wanna talk down on a potential customer before they can even finish a sentence, I don't particularly trust them to tune anything past a wrx with an intake and exhaust.

I realize how petty this sounds, but frankly it's a poor way to treat a potential customer.
+1
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Old 06-27-2019, 08:34 PM   #6
pcampbell
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I initially had my supercharged EJ tunes by a pro. It knocked badly so I learned to do it myself.

It is not that hard to tune. Itís basically timing and fuel. You need to make a lot of WOT pulls. So you need somewhere relatively safe to do that.
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Old 07-02-2019, 08:14 PM   #7
PyroguyFTW
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I've got the area, and I think I could do it, but I'd feel awful if I blew up my engine doing so. I may hang on to the car and try when I graduate and have some more free time.
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Old 07-11-2019, 06:55 AM   #8
pcampbell
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If itís your only car it can be a little tricky to do with zero downtime.
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Old 07-15-2019, 01:56 AM   #9
subaru_gc8
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Quote:
Originally Posted by PyroguyFTW View Post
Sorry for the late response. It's been a busy week at work. I just unplugged the sensor and blew air into it with a compressor, so absolute.
The ECU's capability was my big concern. While tuning it, I was thinking that I could get a tuner to plug in and set a sort of "boost cut" when the MAP picks up more than around 22 psi absolute, but after speaking with the only tuner around and being talked down on before I could even explain that I knew what I was talking about, I don't think I'm gonna be going the turbo route.

I can get the hardware done, but I can't tune, and if the only guys around with a decent reputation wanna talk down on a potential customer before they can even finish a sentence, I don't particularly trust them to tune anything past a wrx with an intake and exhaust.

I realize how petty this sounds, but frankly it's a poor way to treat a potential customer.
I think you are minimizing the tuning effort that it takes to tune for something like a turbo on a not turbo ecu. maybe what they are trying to do is talk you down from a cliff. I know that honestly it would take days to tune a non turbo ecu to accept a turbo from a stock map. and probably because of that its not worth the time nor the effort for them to do so. Yo have to look at it like its going to be more than a week effort to do this. at the moment I have a mr2 spyder that i am tuning for a turbo and ive been at it for about a month and still not good yet. so yeah just takes lots of effort
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