Spooling with a cheetah 68mm.

[Tank222]

Spooling with a cheetah 68mm, when I stand on the break and start to build boost, it will come up to about 4psi. If I creep a little bit forward it will make about 6psi. If I creep forward a little bit more it will build really erratic.

http://youtu.be/n_MAa4-Ohc4

 

[Odyssey25013]

I'd say tuning. I can build 10lbs at 1800rpm. It's pretty linear until then. After that it feels like a surge on and off. My take was the vanes are changing.

 

[Harbin_22]

With my cheetah... I could make 10# without really trying. What convertor do you have?

 

[Tank222]

A precision ml.

 

[Harbin_22]

Me too. Might have something to do with your "dead pedal" problem

 

[Tank222]

It's always been this way even before the dead petal.

 

[Harbin_22]

What kind of boost does it get if you hold it around 1800-1900? Get a video if can

 

[GMC_2002_Dmax]

I have tuned a bunch of LMM/Cheetah combo's.

A few guys here as a matter of fact.

If you need any tuning lemme know.......

 

[pizza pig]

It's always been this way even before the dead petal.

I suppose your huge tires/lift or tuning have something to do with it? :spit:

 

[Harbin_22]

Tires and wheels arent going to make a difference setting still

 

[HDdave]

My bet is converter is too tight. I cant even make 2 psi in 4 low... Got the same trans setup

 

[pizza pig]

Tires and wheels arent going to make a difference setting still

Man I need to start reading before posting LOL :roflmao:

My bet is converter is too tight. I cant even make 2 psi in 4 low... Got the same trans setup

This is more than likely the case, but I know people with this converter/turbo and spooling it is no problem.

 

[Tank222]

I feel like the converter is to loose. I'll take a video in the am.

 

[GMC_2002_Dmax]

did you remove the TQ limits

 

[malibu795]

did you remove the TQ limits

whats fuel, boost target, in 1500-2000rpm? its almost as simple as telling the turbo to behave lik eit has a tighter turbine housing...

 

[duratothemax]

log mm3, throttle % (accelerator pedal) and vane position

 

[GMC_2002_Dmax]

whats fuel, boost target, in 1500-2000rpm? its almost as simple as telling the turbo to behave like it has a tighter turbine housing...

Usually a tq table is missed that limits fueling, the vane target positions are closed down pretty good at low rpms, low TPS% pedal position from the factory.

The fact the boost gets weird as the truck moves forward is also something that could be a tq limiting related issue

 

[Harbin_22]

BTM tables maybe

 

[Tank222]

did you remove the TQ limits

? I haven't touched the tuning. Just what ever my tuner has done.
My laptop battery took a shit this am so I could not log what was suggested.

What kind of boost does it get if you hold it around 1800-1900? Get a video if can

It will not stay at that rpm it jump's around a lot. http://youtu.be/khDEU2fSNUY

 

[DMAXchris]

Holy hell, I've never seen anything like that.