another torque plate question?

[zzman]

My driving habits have me pressing the accelerator to almost the exact
location every time I shift gears. When the rpms reach that spot, where not
much more speed is expected, I shift to the next gear. I hardly ever press
the pedal down any more than that. What I notice is the power surge during
its accelerating. It appears to progress in steps.

Now then, my question is this:
I've noticed the torque plate has steps on it as well. Is this the steps
the plate allows more fuel when rpms reach a higher level?
If this is how it performs this act, would it be better to have the
plate cut in a more slope than in steps? Are the steps perhaps a means to
hold the fuel level til it reaches higher rpms? Would it not work
smoother if I were to grind the corners off the steps?

I am not complaining here, I love the way my truck performs.
I have tried to analyze the way the plate works, and with my power surges
I feel I may be able to explain to myself why the surges exsist.

Hope I didn't put yall to sleep here. Maybe someone could explain these
things to this dumb want-a-be.
Thanks for the brain picking ahead of time.
Ron Z

------------------
97 3500 SLT REDext cab duelly p/u 5sp 3:54 2wd 245/75R16
3" straight exhaust stock torque plate slid full foward star wheel tweeked
105,000 miles still with plenty of ZOOM... ZOOM... ZOOM

RON Z

 

[drawson]

Here is my understanding of how the torque plate works.

It is just a full throttle stop. At part throttle it isn't in play. Pre-boost the AFC cam is the stop and as soon as boost comes on the AFC is blown out of the way and the torque plate become the stop the rack rides again when the peddle is to the metal. The rack is connected to all the plunger lower sections and it untimately is what delivers more fuel(or larger fuel column) to the injectors. My driving habibs are to at least once a day feel the torque plates position to make sure it's still there #ad
#ad
#ad


Hopefully this helps some.

------------------
EAT'M UP
97 2500 Club 4X4 3. 54, Forrest Green/Driftwood, LSD 5 speed, & Psychotty Air System, TST #11, 370 HP injectors, timing at 16 deg. , 16CM2 housing, AFC spring kit, TST EGT gauge & 0-60 boost gauge in A Pillar, Cat-be-gone, 4" Dynomax Bullet muffler, Crome 4" turn down, 2 Electric Fans, One inside/ One out front, AmsOil Through out, Geno's trans filter kit, AmsOil Bypass system, Lund Winter front, Leer Cab Level Shell Driftwood , 255/85R16, South Bend's Hypo Clutch*NRA/USPSA member and proud of it*

[This message has been edited by drawson (edited 04-07-2001). ]

 

[zzman]

drawson,
do you think if I back the star wheel off a little, it might take away
some of the surge I feel? From what you said, I guess I'm feeling where the AFC looses control and
the plate takes over, right?

 

[drawson]

Do you have gauges? If so I would do two things get an AFC spring kit and Boost elbow.

With gaiges you'll be able to tell alot about what is happening when you feel your surge.

 

[zzman]

nope, no gauges. . #ad


What do you think about taking the humps off the plate?
Has this been tried yet?
That bugs me about the steps on the plate.
I'm just not sure what or how those steps play in the role here.

Wish I did have gauges, got to get a portable generator first.

thanks drawson

 

[HEMI®Dart]

zzman

Get an aftermarket performance torque plate and install it in the stock position. Your OE cam plate is not made to be that far forward. Its screws up the calibration of the pump.

Thats probably 99% of your surge problem.

I wouldn't second guess the Cummins engineers. The steps are there for a reason.

 

[zzman]

Thanks Hemi, I wasn't aware of that. It sure pulls good with it up there.
I'll be back in there again I see.

Maybe someone knows the answer to the steps on the plate.
Any takers on this question??

I may find the grinder while sliding back the plate. [just a little]
Then I guess maybe I'll have the answer, or a broke truck, DOAH ! #ad

 

[drawson]

It's been a while since I looked at my stock plate there are some bumps that are present on my TST. I think this is to limit the torque output to make dodge happy.

I just pulled mine out and looked at it it really defuels at high speeds compared to both the TST #12 (230HP/605T) & the #11 (280HP/685T). If you look at our stock torque curves it got to 440T at 1600 RPM and stayed there until 2400 or so. I think these bumps do this. Check out the torque curves on the TST web sight.
www.tstproducts.com

 

[BFaoro]

I would ask Mark Chappel on the TST website or contact Joe Donnley !! #ad

 

[Big_Bad_Dually]

Where exactly is the stock position? My has been slowly progressing forward since I got it #ad
and my scratch mark is gone for factory settings.
Brian