only 21 PSI with Predator program, Something wrong? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: only 21 PSI with Predator program, Something wrong?


stepuptata
04-21-2005, 02:24 PM
I only see 21 psi with predator and I saw 20 psi with stock tune. Is this correct? Ithought it would be closer to 30 PSI. Thanks, Troy.

Pwdr Extreme
04-21-2005, 05:12 PM
I see the same thing with my predator set at 100hp, do you have an LLY?

Other people say they are getting near 30psi, but when I started a thread asking about, I haven't gotten any responses...

It sure seems low to me, like you say, hardly any more than stock

EMSi
04-21-2005, 06:34 PM
I can't speak for sure on the LLY because it has an ecm controlled turbo charger. The LB7 has a mechanically wastegated turbo so unless you do something to modifiy the signal to the wastegate it still opens at the factory spring setting no matter what type of program or box you are using. Mine is stock and I get 21 psi.

Cummin_Stroke_this_Dmax
04-21-2005, 06:38 PM
I get 22-23 psi on my LLY, sometimes if I roll into the throttle I can get it to spike at 30 psi. It might make a difference whether you've got big exhaust or not. Actually..... no it don't, I had the gauges on before the exhaust and didn't notice a difference. Mine flat footing it will spike to 25-27, hits a wall, then runs between 22-23 so your 21 psi isn't too far off.

cid`
04-21-2005, 08:28 PM
With the Predator only, I see around 20-25.. When I stack with the Edge, I get as high as 30+ (analog gauges).

Amric
04-21-2005, 09:52 PM
Today I got 25psi with the stock programming.

StraitDiesel
04-22-2005, 12:14 AM
On my LB7 I can peg the attitude boost to 25.6 at WOT on level 3/low boost 1. I can do this easily anytime I run WOT and it will usually stay pegged at 25.6 until I let off the throttle.

Dan

Cummin_Stroke_this_Dmax
04-22-2005, 12:26 AM
That's because that's as high as the Attitude will go, it tricks the computer. If you had a actual boost gauge on your truck you'd probably be running 30+ psi. The box intercepts the boost, the truck is programmed not to go over 25.6 so when it hits that point the Edge locks that reading but actually the boost is above that. I hope that made sense?

StraitDiesel
04-22-2005, 12:31 AM
Yeah it makes sense, but even if it does go over 25.6 it still is getting a lot of boost at WOT, which is a good thing as long as I don't blow the turbo up! Does anyone know what LB7 stock wastegate is set at for boost control?

Dan

Dmax Tim
04-22-2005, 07:14 AM
I see the same thing with my predator set at 100hp, do you have an LLY?

Other people say they are getting near 30psi, but when I started a thread asking about, I haven't gotten any responses...

It sure seems low to me, like you say, hardly any more than stock
My attitude is maxed at just under 30psi on the LLY and it does it often pulling a trailer.

Seems like we got different people comparing LB7 and LLY, completely different psi ##s