datamaster boost issues

mpettograsso

mpettograsso

Doghouse Member
ok....so here it goes.

I've been using datamaster for about a week now to tune my typhoon. straightened out a few problems to the best of my knowledge. One of them being a huge overboost issue which i corrected last night.....it was boosting at some points to 23 psi ( pretty much stock everything on truck).......

made the wastegate adjustment a few times with inner fender off (easier than i thought). made a few datamaster runs this morning and noticed these issues:

new autometer boost guage will read about 11 0r 12lbs on 1/4 mile run ( launching at 0 boost)...but datamaster shows it to be in the 7-8 range...which is correct?..and what could the problem be?

when i am on the highway in D or OD...and ease onto the gas (ultimately at 100% tps)...it will boost to 13ish.

My questions are, why am i not getting full psi at 1/4mi runs, but i can get it on the highway, and what should i do to correct it?

.and oh yea...got pulled over doing 98mph past a New york state trooper while logging this morning in 35 degree weather....story for another post.
 
turbodig

turbodig

Active member
Re: datamaster boost issues

mpettograsso said:
ok....so here it goes.

I've been using datamaster for about a week now to tune my typhoon. straightened out a few problems to the best of my knowledge. One of them being a huge overboost issue which i corrected last night.....it was boosting at some points to 23 psi ( pretty much stock everything on truck).......

made the wastegate adjustment a few times with inner fender off (easier than i thought). made a few datamaster runs this morning and noticed these issues:

new autometer boost guage will read about 11 0r 12lbs on 1/4 mile run ( launching at 0 boost)...but datamaster shows it to be in the 7-8 range...which is correct?..and what could the problem be?
Click to expand...

Is DM set to 2 bar mode, or 3 bar mode? Stock chip = 2 bar.

Until you recalibrate 'em, they tend to have more boost on 50-60 MPH pulls than they do at launch. This could also indicate less fuel up top as well.
 
mpettograsso

mpettograsso

Doghouse Member
Re: datamaster boost issues

it confused me that on the checkboxes, it said MAP2-3bar,,,,didnt know which one since oem IS 2 bar.

the other thing I noticed was when it reads voltage at the top of the screen, at idle i am getting 12.7v....when I put a meter on the battery it reads 14.3 or higher...why the discrepency?????
 
Tooky

Tooky

Serious about performance
Re: datamaster boost issues

Search 'ecm voltage' on this board, a few guys (mrweelr and E-RUE I think) came up with wiring mods to boost voltage at the ECM. If that's what you're looking to improve..
 
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