SD tune
Drifting
Joined: Aug 2008
Posts: 1,399
Likes: 30
lol @ the guy that said SD tunes are only done WOT.
Racer
Joined: Nov 2007
Posts: 441
Likes: 3
From: Huntsville Alabama
Sd
I went SD just 2 days ago, but still in the process of tuning it. I have no impressions just yet other than seems the car is a little more responsive and smoother at light driving and cruise. We still have to tune it at WOT,,,,,,,,,,,,,,. We had a good problem that made us quit for the evening, it would not hold traction even at highway speeds on full boost.
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Speed density is essentially mechanical tuning. F.I. with out getting into too much detail as to why the MAF dont work, guys in the LSx world use it because the MAF sensor don't work.
What people forget is that even in stock form these cars run a combination of speed density and MAF. In fact in a stock corvette for example when you go WOT (throttle transient), your MAF sensor isn't even being used for fueling calcs and neither is your narrow band front o2 sensors. They just don't have the resolution or response time to do so. In this case your car relies completely on the VE and PE tables until you "simma down"
or go back to part throttle cruising. A Good MAF Tuned car will be just as smooth ad a good SD tuned car and visa versa.
What people forget is that even in stock form these cars run a combination of speed density and MAF. In fact in a stock corvette for example when you go WOT (throttle transient), your MAF sensor isn't even being used for fueling calcs and neither is your narrow band front o2 sensors. They just don't have the resolution or response time to do so. In this case your car relies completely on the VE and PE tables until you "simma down"
or go back to part throttle cruising. A Good MAF Tuned car will be just as smooth ad a good SD tuned car and visa versa.
Melting Slicks
Joined: May 2007
Posts: 2,014
Likes: 48
From: Dayton Ohio
Speed density is essentially mechanical tuning. F.I. with out getting into too much detail as to why the MAF dont work, guys in the LSx world use it because the MAF sensor don't work.
What people forget is that even in stock form these cars run a combination of speed density and MAF. In fact in a stock corvette for example when you go WOT (throttle transient), your MAF sensor isn't even being used for fueling calcs and neither is your narrow band front o2 sensors. They just don't have the resolution or response time to do so. In this case your car relies completely on the VE and PE tables until you "simma down" or go back to part throttle cruising. A Good MAF Tuned car will be just as smooth ad a good SD tuned car and visa versa.
What people forget is that even in stock form these cars run a combination of speed density and MAF. In fact in a stock corvette for example when you go WOT (throttle transient), your MAF sensor isn't even being used for fueling calcs and neither is your narrow band front o2 sensors. They just don't have the resolution or response time to do so. In this case your car relies completely on the VE and PE tables until you "simma down"
or go back to part throttle cruising. A Good MAF Tuned car will be just as smooth ad a good SD tuned car and visa versa. Yep now for more "tame" setups a maf could actually help smooth things out in driveability etc correct?
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Yes. With out getting too heavy into it, the MAF It's just kind of for auto correcting type of thing and for steady steady state type of environment but the computer still relies on the VE for throttle transients. To answer your question a good tuned VE table is just as important and you won't notice a difference in smoothness from a MAF/VE setup to just a VE (SD) setup so as long as the calibration is correct.
This is why when tuning a MAF setup if you do a head and cam swap and your tuner says he don't dial in the VE and only the MAF, get in your car and drive away.
This is why when tuning a MAF setup if you do a head and cam swap and your tuner says he don't dial in the VE and only the MAF, get in your car and drive away.
Melting Slicks
Joined: May 2007
Posts: 2,014
Likes: 48
From: Dayton Ohio
Yes. With out getting too heavy into it, the MAF It's just kind of for auto correcting type of thing and for steady steady state type of environment but the computer still relies on the VE for throttle transients. To answer your question a good tuned VE table is just as important and you won't notice a difference in smoothness from a MAF/VE setup to just a VE (SD) setup so as long as the calibration is correct.
This is why when tuning a MAF setup if you do a head and cam swap and your tuner says he don't dial in the VE and only the MAF, get in your car and drive away.
This is why when tuning a MAF setup if you do a head and cam swap and your tuner says he don't dial in the VE and only the MAF, get in your car and drive away.
Drifting
Joined: Mar 2000
Posts: 1,956
Likes: 135
From: Maryland
CRAPOLA! I had my car tuned last year and went SD at the recommendation of the turner. We did discuss an OBDII emissions check.
I'm up for an emissions check later this year so I guess I'll find out. Not going to be happy if it fails.
I'm up for an emissions check later this year so I guess I'll find out. Not going to be happy if it fails.
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Melting Slicks
Joined: May 2007
Posts: 2,014
Likes: 48
From: Dayton Ohio
[QUOTE=LedfootLarry;1586223301]
Yea it has he "pay wave" feature so as soon as it shows up at the shop it gets scanned and charged... 