SD Tune worth it for a Street Car? [MAF Q's]
02-22-2011, 08:25 AM
#22
I ran my truck in SD for 30k miles(Turbo). Never touched the tune after the ignitial. Drove it in 0 degree to 100 degree temps with no problem.Has 110k miles on the stock motor now.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
02-22-2011, 11:07 AM
#23
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I ran my truck in SD for 30k miles(Turbo). Never touched the tune after the ignitial. Drove it in 0 degree to 100 degree temps with no problem.Has 110k miles on the stock motor now.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
CL-SD is good.
Though Maf-tuned all things considered, makes a better 24/7 job IMO.
02-24-2011, 07:34 PM
#25
If my car was anything more than weekend fun, I'd probably try to get a MAF working on it, but I used to daily drive it OL-SD for a few years. It just had to be touched up every once in a while (season changes).
02-25-2011, 07:50 PM
#26
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^ That would be ideal.. Just spark and fuel changes for stock? Should be. From what I've heard, EFI Live offers an Auto-tune feature to get you in the ball-park. I'd do that and compare the graphs to see what was changed. They also offer a "learn at home" schooling type of software classes.
02-25-2011, 08:51 PM
#27
There is nothing wrong with a SD tune but why limit yourself to half the PCM's ability to deliver accurate fueling?
Like stated in my post before the only time I delete the MAF is for big inch motors that max them out on the flow side (512g/sec) and frequency side (12000hz). You can get around the frequency by using a larger diameter MAF housing and using a LS3/LS7 style sensor. The 512g/sec can be gotten around by scaling all the airflow tables and injector flow rates.
When I tune a vehicle I tune SD and MAF that way when finished both are fine tuned and calibrated and both help deliver accurate airflow data for the PCM to match fuel to.
Also just a FYI the 85mm truck sensor's even though they are bigger have less frequency range per flow than the stock aluminum MAF does. I've had trouble with the 85mm MAF maxing the frequency out on cam only setup's on 98's which are limited frequency wise to 11250hz.
On the SD setups the weather change isn't bad to tune on them if you have the IAT in a location that won't read false heat soak. The factory location is horrible aspecially if you've cut the bottom of the lid base as a free mod. If the vehicle must run SD I normally either try to locate the sensor in the manifold in direct airstream so it constantly has air passing over it or I locate it outside of the engine bay. That alone will keep fueling inline. The 01-up tunes have a IAT/ECT Bias table that you can tweak to help the sensitivity of the IAT some as well. The 00 and older tunes are based solely on IAT only.
Like stated in my post before the only time I delete the MAF is for big inch motors that max them out on the flow side (512g/sec) and frequency side (12000hz). You can get around the frequency by using a larger diameter MAF housing and using a LS3/LS7 style sensor. The 512g/sec can be gotten around by scaling all the airflow tables and injector flow rates.
When I tune a vehicle I tune SD and MAF that way when finished both are fine tuned and calibrated and both help deliver accurate airflow data for the PCM to match fuel to.
Also just a FYI the 85mm truck sensor's even though they are bigger have less frequency range per flow than the stock aluminum MAF does. I've had trouble with the 85mm MAF maxing the frequency out on cam only setup's on 98's which are limited frequency wise to 11250hz.
On the SD setups the weather change isn't bad to tune on them if you have the IAT in a location that won't read false heat soak. The factory location is horrible aspecially if you've cut the bottom of the lid base as a free mod. If the vehicle must run SD I normally either try to locate the sensor in the manifold in direct airstream so it constantly has air passing over it or I locate it outside of the engine bay. That alone will keep fueling inline. The 01-up tunes have a IAT/ECT Bias table that you can tweak to help the sensitivity of the IAT some as well. The 00 and older tunes are based solely on IAT only.
Last edited by LSxPwrDZ; 02-25-2011 at 08:57 PM.
03-02-2011, 01:33 PM
#29
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I ran my truck in SD for 30k miles(Turbo). Never touched the tune after the ignitial. Drove it in 0 degree to 100 degree temps with no problem.Has 110k miles on the stock motor now.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
The catch- I left the 02's on and they did all part throttle corrections so the truck always ran 14.5-1 while cruising.It had a newer computer that has better control than the 99-02 computers.
. I would love to get a tuning suite and do it myself, but i don't have the time and have alot of work to get my car roadworthy as it is.
03-04-2011, 04:14 AM
#30
I'm working on my turbo setup and shooting for some pretty high numbers. The car isn't my daily and won't see much elevation change, or drastic temperature changes, if I were to run sd, would you guys recommend open or closed loop? *new to speed density so go easy lol*
03-04-2011, 11:50 AM
#31
Correct me if I'm wrong here but arent most of the people that get a frost tune by mail. 99% of those tunes are SD tunes, and a large majority of those cars are street/strip cars i would assume from looking at the signatures of the people that post up positive threads about the tune.
