Engine/Transmission (1998.5 - 2002) HELP!! only 2600RPM max while pulling???

[ConwayJ]

I have a 2000 cummins 24 valve with 175,000 with the following mods:

DTT billet transmission

Head Studs

Up graded fuel line and fitting no bango fittings

BD turbo tubes and clamps

Stage 2 air intake

ATS exhaust manifold

5" exhaust

150 GPH Fass lift pump

66/14 Sledpuller turbo 50-55psi

TST comp box

Tim Barber mach 6 injectors 220 hp

Hot or HO vp44 from blue line diesle less then 3 weeks ago with pump cover.

Edge timing box



Pulling set up:

Pro Comp xterrain 35x12. 5x16 on 10" rims

7. 5' heavy built traction bars with leafs clamped

6" skyjacker lift w/3" body

pulls in 3rd gear low range



Have about 12 pulls on this truck this year we found codes and symptomes of the VP44 going bad so that was replaced.

The pull two days following the pump replacement the truck was bouncing off the rev limiter aprox 3200-3300 rpms at 120' "pretty tight track". Truck does have a torque converter lock-up switch, wasn't applied though.

I have been to 4 pulls since and I haven't been able to get the rpms out of the truck on loose tracks or tight tracks maxed out at 2600-2700 rpms. . with out much smoke, tons of smoke in the start leaving with aprox 5psi of boost cleans up pretty quick though.

Runnig down the road can pull 3500 rpms "feels pretty smooth"

Fuel pressure to the VP44 doesn't drop below 15 psi

I have tried running with out the timing box edge no differance

I ran a ground from the battery to the comp box and checked all conections

The only codes I ever pull are over boost codes since the (pump replacement)



Tried to do a test pull with D6 high track cat aprox 50,000 lbs lots of tire spins and speed was able to pull and get 3200 rpms, but not while hooked to the sled.



Just wondering what I should do next????



Have heard valve train, go to the smaller exhaust housing for the turbo. . just to the point of running out of ideas. .

Thanks

Jon

 

[ConwayJ]

Anyone have any ideas????

Thanks

Jon

 

[Timbeaux38]

Post your question in the Competition forum. Those guys will be able to help

 

[Graphic man]

are you running the TST and the edge together?



form what i have been told you should be locking the converter in 3rd gear,



the rpm's will drop a little on a tight track (less tire spin)



Scott

 

[ConwayJ]

I don't know how to move this post to the competiton forum maybe a moderator could do it for me???



On another note I was test pulling tonight on blacktop with another truck got some good pull down and was able to duplicate the low RPM case 2600 max.

Was messing with the order the edge and tst where hooked up and settings for both. It seems to pull 3200 RPMS when the edge is hooked up first to the map sensor and when both chip are set on the highest setting... It has been a while since I tried both on the highest setting, the first time with the new injection pump and it seems to just screem. Way untill Sat at the pull hopefully it gets the RPMS there.

Thanks

Jon