Simple SD question
#1
Simple SD question
I searched around about SD alot. Lot of discussion about tuning but not about benefits. I understand that one major benefit of going SD is when your are at the limit of the MAF and/or its becoming a restriction. But what about a 350-500WHP car, thats not necessarily at the limit of the stock MAS.
So what are the benefits of SD?
EDIT - Well heres what the thread came up with, if you wondering.
-Removal the airflow restriction of MAS, adds 10-20whp on a 350whp car
-Lumpy cams or a light flywheel (or both) that dont like to idle can be cured.
-Minimal off throttle jerkyness/ eliminate liftoff knock
-Small boost leaks are no longer much of an issue; Major I/C leaks, turbo failure, etc. are no longer a "limp mode" event; you could drive the car N/A, and it should still behave like a real car. (DOWNSIDE - a major leak can go unnoticed)
-You can add on a non-stock intake without having to mess with MAF tables
-don't forget vta bov lol (avoid the ricer reason. )
If anyone has an additions or edits, let me know.
So what are the benefits of SD?
EDIT - Well heres what the thread came up with, if you wondering.
-Removal the airflow restriction of MAS, adds 10-20whp on a 350whp car
-Lumpy cams or a light flywheel (or both) that dont like to idle can be cured.
-Minimal off throttle jerkyness/ eliminate liftoff knock
-Small boost leaks are no longer much of an issue; Major I/C leaks, turbo failure, etc. are no longer a "limp mode" event; you could drive the car N/A, and it should still behave like a real car. (DOWNSIDE - a major leak can go unnoticed)
-You can add on a non-stock intake without having to mess with MAF tables
-don't forget vta bov lol (avoid the ricer reason. )
If anyone has an additions or edits, let me know.
Last edited by Evo_Jay; Sep 10, 2009 at 06:43 PM.
#5
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I was getting liftoff knock and jerk which made the car not much fun to drive. It is worth it just to get rid of that. I also noticed slightly faster spool which I know is a bigger deal with my older style turbo than it is with your newer nifty twin scroll pieces but it is still a nice perk.
#6
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Major I/C leaks, turbo failure, etc. are no longer a "limp mode" event; you could drive the car N/A, and it should still behave like a real car.
In fact, small boost leaks are no longer much of an issue; throttle body shaft seal leaks, that noone seems to be able to remedy for long, are automatically compensated for.
The downside to this, of course, is that a major leak can go unnoticed, meaning you end up spinning the crap out of your poor little turbo to achieve the same boost levels. But maintenance and inspection should be part of your routine already anyway.
In fact, small boost leaks are no longer much of an issue; throttle body shaft seal leaks, that noone seems to be able to remedy for long, are automatically compensated for.
The downside to this, of course, is that a major leak can go unnoticed, meaning you end up spinning the crap out of your poor little turbo to achieve the same boost levels. But maintenance and inspection should be part of your routine already anyway.
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#10
Evolved Member
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Buschur claims an average gain of 10-15whp on a 350whp car(on his dyno) when he removes the MAF setup and goes with the AEM EMS with MAP. Just throwing it out there since he seems to feel that it free's up the restriction even at moderate power levels (compared to cars who are exceeding the MAF's flow these days).
#11
EvoM Guru
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Buschur claims an average gain of 10-15whp on a 350whp car(on his dyno) when he removes the MAF setup and goes with the AEM EMS with MAP. Just throwing it out there since he seems to feel that it free's up the restriction even at moderate power levels (compared to cars who are exceeding the MAF's flow these days).
#14
I was getting liftoff knock and jerk which made the car not much fun to drive. It is worth it just to get rid of that. I also noticed slightly faster spool which I know is a bigger deal with my older style turbo than it is with your newer nifty twin scroll pieces but it is still a nice perk.
Last edited by Evo_Jay; Sep 10, 2009 at 06:44 PM.