Innovate (Sprintex) Supercharger Owners Topic - Page 281 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

xxscaxx · 03-13-2014, 03:02 PM

Quote:

Originally Posted by moto-mike

Spinning the wheels top of 2nd with 255's on pump gas

You just made me go from so sad, to so happy, all in a matter of hours

Thanks for putting in the time to figure out the issue.

Also thank you for increasing the money in my pocket as I can now sell another map sensor

Dustin · 03-13-2014, 03:15 PM

My nethers just twitched. Thanks for the good news!!

sw20kosh · 03-13-2014, 03:27 PM

Quote:

Originally Posted by moto-mike

We had 5 different tuners/their customers we've been in touch with recently who were all having the same issue and tried the same things. I looked back and the only customers we had that didn't have the issues had stock map sensors. Since the CARB tune used a stock MAP sensor, that is why they were not having the issue.

It is for a few reasons, some of which I don't have the time to get into. But basically because of how the SC flows, the cam phasing is critical, and unlike turbos and the centrifugals; it creates a different flow pattern right at the runner and is the reason for the wobbly MAP signal.

In double checking and making a few phone calls we know that not the omni, the OEM honda, nor the denso IAT based map sensors will work. I think any >1.3 bar sensor will have the same issue when intercooled.

How can a wobbly MAP sensor reading cause such a huge decrease in power >5k rpms. Not questioning you just asking what things are changing in the ECU when the MAP reading gets wobbly? How could this cause misfires?

swift996 · 03-13-2014, 05:10 PM

FWIW I noticed post-intercooler install with the 72.5mm pulley my MAP Sensor reading had a lot more deviation in it's reading: (running 3-bar Omni)

Kodename47 · 03-13-2014, 05:16 PM

Quote:

Originally Posted by xxscaxx

I also plan on going to the 210+. But I wouldn't expect that out for at least a few months.

4-6 weeks in the UK is what I've been told.

My tuner also advised to use the OEM MAP sensor. Looking through the maps, if you're using a MAF based setup then there's no reason to need a higher pressure sensor. The only thing you miss out on is seeing the correct pressure through the OBD port.

Calum · 03-13-2014, 06:25 PM

Quote:

Originally Posted by moto-mike

We had 5 different tuners/their customers we've been in touch with recently who were all having the same issue and tried the same things. I looked back and the only customers we had that didn't have the issues had stock map sensors. Since the CARB tune used a stock MAP sensor, that is why they were not having the issue.

It is for a few reasons, some of which I don't have the time to get into. But basically because of how the SC flows, the cam phasing is critical, and unlike turbos and the centrifugals; it creates a different flow pattern right at the runner and is the reason for the wobbly MAP signal.

In double checking and making a few phone calls we know that not the omni, the OEM honda, nor the denso IAT based map sensors will work. I think any >1.3 bar sensor will have the same issue when intercooled.

Thanks for posting all of this Mike.

Does the stock sensor have a slower reaction time causing it to average out pulsations from the compressor? I wonder if simply adding an inductor inline with the other sensors would clean thing up?

Xero-Limit · 03-13-2014, 07:06 PM

Quote:

Originally Posted by Calum

Thanks for posting all of this Mike.

Does the stock sensor have a slower reaction time causing it to average out pulsations from the compressor? I wonder if simply adding an inductor inline with the other sensors would clean thing up?

Not really, it just loses all resolution above 5 psi where we have the issues. We will be working on ways to get around this issue so we can have proper boost measurement.

mikalem · 03-13-2014, 07:10 PM

Finally got the car on the road for the first time - thanks to everyone that helped me with the stupid install problem over the weekend - just got back from the first run - car feels so much better than before! Some small things came up - hoping to get some answers to that here soon. Glad to be a part of the club!

swift996 · 03-14-2014, 11:26 AM

Dumb question but it's been a while, should I disconnect the battery when changing the MAP sensor?

King Tut · 03-14-2014, 11:27 AM

Quote:

Originally Posted by swift996

Dumb question but it's been a while, should I disconnect the battery when changing the MAP sensor?

I didn't the couple times I changed mine.

Dustin · 03-14-2014, 01:16 PM

Quote:

Originally Posted by moto-mike

Since the CARB tune used a stock MAP sensor, that is why they were not having the issue.

I thought our cars ran off a MAF sensor stock?

sw20kosh · 03-14-2014, 01:21 PM

Quote:

Originally Posted by Dustin

I thought our cars ran off a MAF sensor stock?

It has both a MAF and a MAP sensor. It primarily relies on the MAF for fueling in stock form.

Dustin · 03-14-2014, 01:23 PM

Quote:

Originally Posted by sw20kosh

It has both a MAF and a MAP sensor. It primarily relies on the MAF for fueling in stock form.

Cool. Did not know that. Thank you.

swift996 · 03-14-2014, 01:42 PM

Swapped back to the OEM MAP sensor, things feel good and smooth now. Hoping to get back up to the dyno next week if I can find the time.

03-13-2014, 03:15 PM	#3922
Dustin Twin Screw You Join Date: Nov 2012 Drives: 2013 Supercharged Whiteout FR-S Location: Burleson, Texas Posts: 1,231 Thanks: 464 Thanked 620 Times in 332 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	My nethers just twitched. Thanks for the good news!! __________________ My 86 Differential and Ring & Pinion DIY

03-13-2014, 05:10 PM	#3924
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 955 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	FWIW I noticed post-intercooler install with the 72.5mm pulley my MAP Sensor reading had a lot more deviation in it's reading: (running 3-bar Omni) __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

03-14-2014, 11:26 AM	#3929
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 955 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	Dumb question but it's been a while, should I disconnect the battery when changing the MAP sensor? __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

03-14-2014, 01:42 PM	#3934
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 955 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	Swapped back to the OEM MAP sensor, things feel good and smooth now. Hoping to get back up to the dyno next week if I can find the time. __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

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