sutyak's turbo focus

[sutyak]

Just caught up on this thread--damn, man, nice progress! Looking forward to seeing more and hopefully seeing it in person someday!

Thanks! Ran it up to 19psi today before a meth nozzle connector worked loose. I hope that's a one time thing. Sprayed water/meth all over my intake manifold and of course a boost leak.

[ERR0RMACR0]

Thanks! Ran it up to 19psi today before a meth nozzle connector worked loose. I hope that's a one time thing. Sprayed water/meth all over my intake manifold and of course a boost leak.

That sucks :( Hate when something like that happens. Were you WOT when it happened?

[phillysrt4]

Thanks! Ran it up to 19psi today before a meth nozzle connector worked loose. I hope that's a one time thing. Sprayed water/meth all over my intake manifold and of course a boost leak.

was there any danger to manifold? :)

[sutyak]

That sucks :( Hate when something like that happens. Were you WOT when it happened?

Yep. I guess 19psi was the magic number for it to work loose, because it would hit 19 and start to "flutter" like the boost wasn't being held. Well the meth nozzle connector was lifting and causing a boost leak. If I let off and get back in it the boost would be smooth again right up to 19.
I was thinking spark blowout until I saw the nozzle.

[phillysrt4]

So can you use the SRT boost leak fix for this (zip ties)?? :)

[sutyak]

So can you use the SRT boost leak fix for this (zip ties)?? :)

Hey now. I LOVE my zip ties! Even the smallest zip ties I've pressure tested to over 100psi. I'm pretty sure the line would burst before they broke.

[phillysrt4]

Hey now. I LOVE my zip ties! Even the smallest zip ties I've pressure tested to over 100psi. I'm pretty sure the line would burst before they broke.

zip ties are an SRT owner's best friend. Ask anyone who has owned one!

[JeffreyCole]

1102440_10152121194843625_1294734025_o.jpg

Zip-Tie love is strong in the DSM world too.

Username on here Dewayne's 1g DSM on the way to the 2013 Buschur Racing DSM/Evo/GT-R shootout in Norwalk.

Edit: Pre-Plastidip photo even!

[phillysrt4]

Just had a moment of inspriation: "Zip-Tie Mafia"

[ERR0RMACR0]

1102440_10152121194843625_1294734025_o.jpg

Zip-Tie love is strong in the DSM world too.

Username on here Dewayne's 1g DSM on the way to the 2013 Buschur Racing DSM/Evo/GT-R shootout in Norwalk.

Edit: Pre-Plastidip photo even!

That's really funny

[sutyak]

Well that 19psi stutter wasn't the meth connection. It happened on tonight's data logging, too. I'm guessing it's spark blowout, or my chinese blow off valve isn't holding. My new bov should be here in the next few days. I'd be surprised if it's the plugs, as they are only gapped to .035". A quick google search shows other cheap bovs that don't hold above 19psi.

[JeffreyCole]

A leaking blow off valve should cause a rich condition in a Maf car, as it would be a big ass boost leak.

Personally, I think your gap is too wide. My stock gap in the DSM is .028, and I usually run .024-.025. Closing the plug gap is free. Give it a shot.

[sutyak]

A leaking blow off valve should cause a rich condition in a Maf car, as it would be a big ass boost leak.

Personally, I think your gap is too wide. My stock gap in the DSM is .028, and I usually run .024-.025. Closing the plug gap is free. Give it a shot.

Great info. I'll close up the gap and run it again this weekend.
On another note, the Torsen limited slip is just amazing. I fought so much wheelspin before. No way my one all season spinning would have held up to this much boost.

[PaxtonShelby]

Good to hear the Torsen is worth the $$$.

[sutyak]

Well I've been quiet because I ran into fueling issues, or I thought I had. It turns out the MAFia is pegging around 3.5v-3.6v, even though the MAF without it hits 4.5V+ fine.
I thought it was demanding too much fuel at 19psi, but the boost pressure had nothing to do with it, and the fuel pump duty cycle wasn't even 70%. The common factor was the MAF volts. After much reading it turns out another Duratec Focus owner ran into their MAFia pegging at 3.5V.
When using the MAFia the car felt like it hit a rev limiter around 3.5v MAF and 1.9 fuel pump flow. (I'm not sure what the fuel pump flow units are)
Today I removed the MAFia and ran it up to 4.5v and 2.3 fuel pump flow with no cutout.
I'll be ditching the MAFia and going with a wider range MAF sensor; either the SCT, Pro-M, or VMP. From what I've read they are all basically the same thing.
For now I'll stick to 12psi until I get the MAF situation worked out. It's already in a 3" MAF housing and is basically pegged at 12psi.

[sutyak]

On a positive note I got the MAP sensor input to the XCal2 working. To share a dumb moment, I originally hooked it up to the same boost line as the boost controller, which is a bleeder valve style. Well of course it never read correctly since the pressure in that line was never what it was in the intake manifold! I finally picked up some more hose Ts and hooked it up with the meth controller.
This type of boost controller certainly spikes before settling.

The BIG thing I'm glad about in this chart is the violet line which is the Fuel Pump Flow Rate. It reach a new max after removing the MAFia. MAF counts here got up to 905, but it's not on this chart.
yellow = boost (12.7psi spike settled to 11.5psi)
blue = AFR
greenish/orange? = load
grey? = rpm
Yes I'm colorblind...

[Tom]

Is it possible to max out the maf sensor before it gets scaled by the mafia? So if you hit 15psi and its 7v on the maf, but it can only do 7v total, then the mafia (@50%) would be stuck at 3.5v on anything above 15psi.

Did it scale right at lower psi?

[sutyak]

Is it possible to max out the maf sensor before it gets scaled by the mafia? So if you hit 15psi and its 7v on the maf, but it can only do 7v total, then the mafia (@50%) would be stuck at 3.5v on anything above 15psi.

Did it scale right at lower psi?

I think that explanation would defeat the purpose of the MAFia; if the MAFia couldn't prevent the MAF from pegging then there is no point using it.
It scaled up to 3.5v, regardless of PSI and setting.
So I was able to crank the boost up to 19psi on setting "3" on the MAFia, but it still pegged at 3.5v. So technically I could keep cranking the MAFia settings up and live within the 0-3.5v range, but then my overall resolution goes to crap and I'd probably have to set my idle around 1300 RPM just to stay in range. The MAFia has settings from 0-8 I believe.

Without MAFia, I (nearly) max out the stock MAF at 12psi and 6500 RPM. No fuel cut. MAF at 4.5v.
MAFia setting 2, maxed out at 12psi and 6000 RPM. Fuel cut. Scaled MAF at 3.5v.
MAFia setting 3, maxed out at 15psi and 5500 RPM, or 19psi at 5000 RPM. Fuel cut. Scaled MAF at 3.5v.

[JeffreyCole]

This page has the correct scaling of the sensor.

https://www.diablosport.com/products/mafia.html

Don't know what that particularly means, as I ditched my maf long ago and went to speed density.

Edit:

this might help more.

https://www.diablosport.com/manualFi...structions.pdf

You have to adjust your tune based on what scaling you use on the MAFiA

[sutyak]

This page has the correct scaling of the sensor.

https://www.diablosport.com/products/mafia.html

Don't know what that particularly means, as I ditched my maf long ago and went to speed density.

Edit:

this might help more.

https://www.diablosport.com/manualFi...structions.pdf

You have to adjust your tune based on what scaling you use on the MAFiA

Yep, I'm not new to the MAFia, I've just never pushed it this far. I used to run a MAFia on my original turbo setup, but that little IHI turbo I had certainly didn't flow like this garrett.