? about going to speed density
03-24-2008, 12:04 AM
#1
? about going to speed density I have a 94 Z28 that i'm getting ready to do a lot of work to and the computer is going to be re-tuned can i have the mass air tuned out of it and make it a speed density set-up... I'm guessing it's not that easy though lol..
03-24-2008, 12:38 PM
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I was thinking about it but I think I will have to go with an aftermarket fuel management system anyway do to the faqct I can only goto 7200rpm with the stock one
my question is say with the bs3 system you can eliminate the maf as well?
my question is say with the bs3 system you can eliminate the maf as well?
03-24-2008, 01:24 PM
#6
cause im making a custom CIA and with my design its either move the radiator forward which is a possibility since a/c is gone or i can tune the mass out which seems alot easier..
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03-25-2008, 05:14 PM
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With MAF the computer is actually measuring the amount of air being used and adding the correct amount of fuel. With SD The computer is basing the fuel used off of the VE tables and MAP sensor measures the load the engine is under. Is one better then the other? Not really unless the MAF is a restriction and the motor isn't getting enough air
03-25-2008, 05:22 PM
#12
If up around 500rwhp and YOU PERSONALLY can tune it well then MAYBE consider speed density. Otherwise all you are doing is creating tuning hassles. Going to pay a tuner more to set it up and it will be more sensitive to weather changes, not to mention future modifications.
03-26-2008, 02:30 PM
#13
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What he said.^^^ It can really be a pain. Also the maf reference really helps the car run smoother.
Dave J. Do you know I trick or some thing I am missing? My OBD II PCM will only fuel to 7050 RPM.
Dave J. Do you know I trick or some thing I am missing? My OBD II PCM will only fuel to 7050 RPM.
03-26-2008, 03:12 PM
#14
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I have obd1 I am not sure what the tuner did but I have taken it upto 7200 and it doesnt cutout or anything
maybe it just takes the 7050 rpm fuel values?
I dunno
my pcm only controls the fuel the timing and spark are controled by a rear mount style distributer and the digital 7 ignition box
maybe it just takes the 7050 rpm fuel values?
I dunno
my pcm only controls the fuel the timing and spark are controled by a rear mount style distributer and the digital 7 ignition box
03-26-2008, 03:20 PM
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There was a good discussion about this in the PCM forum. A lot of tuners were saying that you should be tuning in SD mode first to get everything right and then turn on the MAF and work it in. They were saying most people just go to one or two tables and make changes instead of actually tuning everything.
03-27-2008, 08:05 AM
#17
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If you run a standalone BS3 it's a SD system. You can piggy back it onto your stock wiring and maybe do something like that, but as far as I know it doesn't use a MAF. That's why there was a big deal with all the nitrous guys not being able to run dry systems because there is no MAF to compensate for fuel. I got mine in the mail last week and there is no sensor hook up for a MAF, just MAP, IAT, etc.
03-27-2008, 12:48 PM
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It's a 383ci with a single turbo. Well past the 500hp mark. Still in the works but not much more to go. SD has it's benefits once you go turbo/supercharger. One thing that sucks is you need to make sure all your mods are done before you get the tune. SD is more crucial to needing a re-tune even after small things like better exhaust, larger TB, intake, etc.
But your considering going SD so your custom CAI will work. Do you have a template or something for us to see? The Ram Air cars manage to use a MAF, just curious to why you can't squeeze it in.
But your considering going SD so your custom CAI will work. Do you have a template or something for us to see? The Ram Air cars manage to use a MAF, just curious to why you can't squeeze it in.