Input: Speed density vs MAF
Thread Starter
Burning Brakes
Joined: Sep 2011
Posts: 764
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From: odessa FL
Input: Speed density vs MAF
In the midst of a TT build, 5-7# intially with more [10-12] in future after engine upgrades. Is there any downside in driveability in going with a well executed SD tune? Added 2 BAR sensor while manifold off. Anyone done this have regrets?
Previous turbo experiance was with with carbs. Im familiar with both MAF & SD systems theoreticly, but new to EFI tuning. [yes, I'm having it professionally done]
Previous turbo experiance was with with carbs. Im familiar with both MAF & SD systems theoreticly, but new to EFI tuning. [yes, I'm having it professionally done]
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
In the midst of a TT build, 5-7# intially with more [10-12] in future after engine upgrades. Is there any downside in driveability in going with a well executed SD tune? Added 2 BAR sensor while manifold off. Anyone done this have regrets?
Previous turbo experiance was with with carbs. Im familiar with both MAF & SD systems theoreticly, but new to EFI tuning. [yes, I'm having it professionally done]
Previous turbo experiance was with with carbs. Im familiar with both MAF & SD systems theoreticly, but new to EFI tuning. [yes, I'm having it professionally done]
motor will act a little diff in colder weather with the HP TUNE on the car from using the MAF, But with the ending up with that much RWHP AND TQ go with the SD tune, If you get someone that is really good and know what he is doing you will be fine. You have a few good shops in fla that know what they are doing... Robert
Safety Car
Joined: Aug 2004
Posts: 4,734
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From: Youngstown Ohio
I asked this question a year or so ago although for a SC not turbo. You're gonna get alot of different opinion but from what I learned a proper SD tune is going to return excellent results. Also,seemed that on turbo setups a min two bar is preferable although many are running maf tunes with mild/moderate turbo setups. For my application I stuck with maf but I'm not pushing it nor am I running a turbo.
If you can get a proper SD tune from the information I gathered there is no reason not to do it. SD tunes take considerable time to do right, not that maf doesn't, and seem to cost more because the time involved.
Good luck,
Darion
If you can get a proper SD tune from the information I gathered there is no reason not to do it. SD tunes take considerable time to do right, not that maf doesn't, and seem to cost more because the time involved.
Good luck,
Darion
Race Director
Joined: Jul 2005
Posts: 11,199
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From: Think BEFORE hitting "Submit Reply"
I asked this question a year or so ago although for a SC not turbo. You're gonna get alot of different opinion but from what I learned a proper SD tune is going to return excellent results. Also,seemed that on turbo setups a min two bar is preferable although many are running maf tunes with mild/moderate turbo setups. For my application I stuck with maf but I'm not pushing it nor am I running a turbo.
If you can get a proper SD tune from the information I gathered there is no reason not to do it. SD tunes take considerable time to do right, not that maf doesn't, and seem to cost more because the time involved.
Good luck,
Darion
If you can get a proper SD tune from the information I gathered there is no reason not to do it. SD tunes take considerable time to do right, not that maf doesn't, and seem to cost more because the time involved.
Good luck,
Darion
I ran a SD tune on my car and driveability was fantastic, but it did take time to dial it in for part-throttle work.
A lot of logging and refining, but I think it was worth it.
I'd do it again without hesitation, especially with a big power car.
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
I run my TT car with a SD tune and my boost ranges from 8-18 and I have never once regretted it. It drives far better than my MAF tune ever did. It has a lot to do with who does the tuning, though. 
AKA "The CLOWN"
Joined: Feb 2010
Posts: 6,261
Likes: 13
From: Chicago South Suburbs
Can you make more HP with a SD over MAF?
I'm going SD in the spring, and looking forward to it!
Is throttle response better just off the line, or can you feel it through out mid and high RPMs
I'm going SD in the spring, and looking forward to it!
Is throttle response better just off the line, or can you feel it through out mid and high RPMs
Last edited by Blitzkrieg; Dec 10, 2011 at 01:54 PM.
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