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Basically I am stuck with a 98 POS PCM. I am currently running the 98 2 bar OLSD OS with a 2 bar GM MAP sensor and it worked great for the stock bottom end turbo build. Now I'm going forged and want to turn the boost up over 20 psi. Is it possible to fudge the VE and use a 3 bar MAP sensor? Basically just reduce the resolution by 1/3. Will this screw anything else up?
How about using a 4 bar map sensor and splitting it in half?
Should work fine if you scale the other proper parameters. All the MAF guys are doing it now.
What are the other proper parameters? Just pop in the 0-5v 4 bar map and cut everything that references the MAP entry and exit in half and rebuild the VE table? Or is there something else?
Not sure of all of em. There is a thread in the gen IV section right now. Seems its on Greg's DVD tho (I guess Im gonna have to buy it one of these days)Quote:
Originally Posted by LosLS2
Curious why you wouldn't use a 2-bar sensor. If you scale it, you're losing resolution on your VE and other tables.
Hes maxed out the 2 bar and hes got a 98 PCM (only 2 bar support)Quote:
Originally Posted by blownbluez06
:doh: was thinking MAF still. Yeah you should be ok halfing all the values referencing MAP.
What kind of F/I are we running? You can tune past 2 bar with a centrifugal supercharger.Quote:
Originally Posted by slow67
y not just repin the connector for the 99up pcm?
I'm running a front mount turbo setup. Regardless, how is boost from a blower different than from a turbo?Quote:
Originally Posted by blownbluez06
The limitation is that the only custom OS available for the 98 PCM is a 2 bar. 99 and up PCM's have alot more options available to them.
I've considered that and am also considering the megasquirt II. At this stage of the game, I've just about outgrown the stock PCM.Quote:
Originally Posted by gold98Z28
if you have the coin, then go aftermarket. but you can do alot with a repin and a 3bar OS.