Stock Maf Limits

OldBoy

Chr#%t, don't remind me of that horrible white sh!t. Feels like summer just started...

Boosted Performance

3" pipes:

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Mitco39

oooo gimmie gimmie. lol. Ill have results next week. It will take some time to retune the car.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

TopgunZ

Sasha,

Do you have a few sets of these made up? I would like to get one soon. My motor is going to the machine shop today.

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Boosted Performance

Ordering more pipes today so I can fabricate a few sets. I think it would be best if these become standard in the kit.

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TopgunZ

I totally agree. Man, I came into the game 6 months too early..lol.. There have been some amazing revisions to this kit, which was phenomenal when it was at Rev.0.

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Mitco39

Got the 3" in and tuned. The only real benchmark I have was a 80-140km/hr speed run with the racelogic VBOX sport what is very accurate and used by car and driver to benchmark their cars. We started out with a 80-140 speed of 3.92 seconds. After the tuning we were down to around 3.60 seconds. The car is much faster now that I can safely run up top. I ran the timing into knock and backed off about 2 degrees to be on the safe side.

The downside to you guys looking for built block setups and want to run over 13PSI of boost I think different MAFs are still going to be required as now I am sitting ~4.75 volts IIRC. I think anything over 14PSI will peg the MAFs.

For what its worth my K value changed about 15% from what it was with the 2.75" boost tubes. So its fair to say that there was about a 15% increase in flow around the MAFs with the larger boost tubes.

__________________
2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

Boosted Performance

Thanks for posting the feedback Mitch. This is about what I calculated as far as flow increase.

This sure makes you wonder how some others get away with 2.5" charge pipes.

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750WHP starting @ $7,500 to the door
FOR DETAILS VISIT: http://www.the370z.com/members/boosted-performance.html
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Mitco39

Anytime Sasha, shes much quicker and safer now.

Lower boost? and a ton of timing? That or everyone is pulling into their MAFs and no one really pays much attention to it and just changes their fuel comp tables to suit? I mean it works but man it doesn't leave much room for error. Maybe thats a contributing factor to many of these popped engines? Who knows its all speculation.

__________________
2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

GaleForce

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TopgunZ

Dumb question #1. How did I push 11lbs of boost through just one of these on my 06 single intake 350?
Dumb question #2. Can we somehow use the 350 mafs?

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Mitco39

Answer to question number 1: Its not boost your measuring its airflow. So that could be why.

#2 - You can use the GT MAFs that uprev sells if you need the extra room.

No dumb questions at all.

__________________
2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

COSMO

My gtm tt kit came with 3" tubes..

Boosted Performance

Correct, but there are kits out there that come with 2.5" tubes.

I used 2.75", which was sufficient for stock block power at the time of development. However, it seems like customers are starting to push more and more power, with higher boost levels. I have built a couple of sets of 3" pipes in the past for those that intend on building their engines...but for the most part the 2.75" tubes will do the job.

The V-2.0 will come with 3" pipes, and that should be more than enough to push the stock block to it's absolute limits. Upgraded MAF sensors are available with the kit too, for those that build these engines and want to run 15+psi of boost safely.

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TopgunZ

Why dont we just make 3.25" tubes?

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