i ahve a stock pcm that is tuned and i'm using a 2 bar map sensor. will my car beable to read the 2 bar map? i'm going to be running 8psi

 

you willbe able. you will have to rearrange the whole cal though...

 

2 bar map sensor will work, but you lose resolution for everything below boost levels. It probably won't affect too much as long as you are good with tweaking your tune.

I'm going to migrate to a 2 bar map sensor when I install the delteq since the 6BTM will not work with the opti replacements. WIth the help and files of a few people on here, I created the this tune as my baseline.

http://www.lt1.org/other/2barblower.bin

I haven't run this tune yet, and I wouldn't trust it completely because I haven't had a chance to shake it down. If you do use this as a starting point for your tune, let me know if you have to make any big corrections to get it to work right.

 

Not sure what good a 2 bar map will do you, since you'll hit the MAF limit long before it becomes an issue anyway...

 

You can always tune around the maf limitation, so that shouldn't be a problem.

 

so basically don't use the two bar sensor?? thanks guys

 

Yes Use It

 

Ion tuned the car for everything except for the 2 bar, since i got it afterwards. he has it setup for the boost i'm running. still need to get a dyno tune then have the computer sent back to him.

 

The MAP sensor isn't used for much on a MAF car, so its pretty pointless.

 

There's obvious advantages to having a boost-aware PCM, otherwise all the turbo and supercharged cars coming from the factory would have a 1 bar map sensor and blindly adjust timing and fuel when it hits boost.

the main reason why I want to do it is that a boost-aware PCM has accurate spark control based on boost level, not on a worst case scenario -- this adds the ability to swap pulleys without a retune (as long as boost fuelling is also covered). I could use the MSD box if I wanted to stick with the opti, but I want to replace it with something that's maintenance free.

 

i have the msd btm unit on my car

 

my computer wouldn't let me view you link for the tun baseline...

 

No that is not correct really..

The map is extremely important for timing and VE and open loop fueling...

The maf will not negate everything....

Roadie... when you change the boost it is often times better to re-tune. there is nothing like a tune for all conditions... and since you don't have a MAP PE table, well... you will need to deal with your fueling again.

 

Actually, you're not correct either! The MAP is indeed important for timing, which I neglected. But its not used for open loop fueling, at least on the LT1.

Now, if your MAF fails and you fall into speed density mode, its used. But that's not an open/closed loop issue.

 

Sorry i meant speed density... not open loop, as VE goes in par with Speed density and not open loop.