Engine/Transmission (1998.5 - 2002) Dyno day victory - my win and observations

[TomGolden]

Howdy all,



In the Local/Regional Events forum, you can see the results from

the NorCal dyno event on Saturday. I wanted to post a bit more

than just my numbers, as I thought some of you would be

interested in my observations and this information.



By the way, I took Top Horsepower award among 25 total trucks.



This was at sea level, on a Dynojet dyno. There were 25 trucks

total that dynod, including a 2003 Dodge, 2003 Ford 6L

PowerStroke and 2003 Durapuke. Several people were

speculating that the dyno numbers for torque were very low, at

least 200+ ft/lbs too low. Is that true... ??? Who knows...



You can see my BOMBs in my sig, basically for power I have

DD3's, drag Comp, and unmodified HX40. Oh, and a K&N filter.

We each got two runs on the dyno. The dyno operator drove all

the trucks, the owners didn't, so hopefully that made everyone's

numbers a bit more comparable, eliminating any differences that

could have been introduced by different drivers.



On my first run, I had the Comp turned totally off, then on 5x5 for

the second run. I wanted to see exactly how much a Comp does

produce on an ETH motor.



Comp off: 344 HP / 684 TQ

Comp on 5x5: 439 HP / 826 TQ



So, apparently a "hot" Comp box produces ~95 HP and 140 #'s

of torque on an ETH. If I remember correctly, the hot COmp is

supposed to add 130 HP, and I think 300 #'s of torque. So, due

to the known "problems" with getting maximum possible

performance from an ETH, I'd say my numbers do seem to be

appropriate.



Later in the day, another Cummins truck (SpunkysRam) ran with a

regular Comp box, and then borrowed mine to see what the

difference would be between a regular and a hot Comp. His truck

is a 2002 auto trans, but is a 4x4 and I believe he has 3. 54 rear

end gears like my truck does. I believe he also has DD2s and the

stock HY35 turbo. Don't recall if he still has the stock auto transmission

though. One set of his numbers is 368 / 765, and I think these

may have been his numbers using my Drag Comp.



The Drag Comp is, I think, rated at 30 HP more than the regular

Comp. Spunky and I were quite surprised to see something like a

90 HP difference on his truck between his Comp and

mine... I don't remember what the torque numbers

were.



So... for anyone considering a Comp box, I hope my results are

valuable data for you. Feel free to post or email me directly with

any questions.



I'll post a couple pictures as soon as I get them off my camera.



Tom

 

[TomGolden]

Zilla on the dyno...

 

[TomGolden]

a little smoke... .

 

[radar doctor]

Congradulations

Congrads Bro, That was interesting. Radar DoctorOo. Oo.

 

[Brandon]

big congrats to you Tom... ... ... ... .

 

[Bill_L]

Tom,



Were you going to or have you posted all of the numbers anywhere?



I think that the torque numbers from the dyno were a little on the low side as well.



The two different torque readings for my truck were 715 and 741 from the two runs. .





If anyone that was taking pictures has pictures of the smoke clouds from my truck I would love to get a copy.



Bill

 

[kaptn]

I am just curious to know what the EGTs were on the guys truck that ran the DD2s and the drag comp with the HY35(stock)?I can hit 1350 with just DD1s and no box.

 

[RCone]

What Kaptn said. That is why I am sending this back to the top. I too, an considering going up to a Comp from my EZ and don't have the money for a turbo upgrade (stock HY35) and need to know what EGT's people are seeing with a Comp and stock HY turbo.



Roger

 

[TomGolden]

Thanks guys



Bill L, check out the Local/Regional Events forum here, and you'll see BigBadDodge posted a link to the full results over on the Diesel-Central site.



Kaptn, Roger and anyone else interested, the guy who ran my hot Comp with the stock HY35 is also a TDR member (I think), username is SpunkysRam. Send him a PM and ask about his EGTs, as I don't know what they were.



By the way, my EGTs were only 1187* at 45. 7 PSI of boost.



Tom

 

[Bill_L]

Tom,



Thanks I found the post this morning.



Roger,



I have the Drag Comp with DDII's and my little HY was spinning at about 43psi on the dyno. The temps on the dyno only went to about 1150. I have seen higher than that on the street if I keep the pedal pinned to the floor. I think the highest I have seen was about 1550. I know that before the Drag upgrade the temps were a little lower but not much.



I do have a J hook on my turbo.



Bill

 

[HVAC]

Top Dog

Congrats Tom on the good showing. Now just get that shifting down

 

[KKaiser]

Well Tom,



It looks liked you figured out that defueling problem you had! Bill had 900 some odd foot pounds, That's incredible. Do you think the torque #s were low when he pulled that?



Kent

 

[RCone]

Confused??????????

TomG and BillL,



Congragulations on your numbers and thank you for your reply. I am confused however. On my HY with the hardline modified I am see a max of 28 lbs boost. Piers has also told me that one shouldn't go higher than 34 lbs on a stock HY35. Is the Comp making that much difference in your boost (43 to 45 lbs) and are you concerned about that?



Regards,



Roger

 

[RAPID RICK]

That O3 Ram sure got spanked by the Power Stroke & the Duramax.

 

[Bill_L]

Roger,



I am not really sure why I am seeing so much boost. I have heard of other people that even with the J hook seeing boost in the low 30s. I know that it really good for the HY to make that much boost since it is way out side of its efficient range.

I am not worried about it since I should have my new PDR HX40-16 on Friday along with my ATS manifold and Banks High-Ram.



Bill

 

[SEmerson]

With a disabled gate I can hit about 1300 with my blue box off. And that is on a long hill with a trailer. And about 32 psi. With my blue box on I can peg my 1600 and hit about 40-45 ( hard to say my #'s stop at 35). 1350 with dd1's seem to be high but about right for a stock gate. I ran once with only my injectors(warrenty work and thay where just too hard to get out) and I could get 1300 or better.

 

[TomGolden]

Roger - more fuel -->> more boost, so part of my higher boost is

due to the Comp and the rest due to my DD3's. Even though you

have your wastegate modified (you don't say exactly how, so I'm

not sure... ), if you also have a boost elbow installed, that will also

affect how much boost you are getting.



A few months ago, I was having a terrible problem that I at first

thought was a defueling issue. Everytime I would go to WOT,

after about 2 - 3 seconds, everything just instantly shut down,

and I do mean instantly... just like you shut the engine off. Well,

eventually, a buddy of mine, who isn't a TDR paid member but

does lurk, diagnosed it as a bad boost elbow (Thanks Jake!!!). I

had an adjustable boost elbow, and it went bad on me, allowing

my wastegate to open at ~18 PSI instead of 42. So, when I

hammered the go pedal, as soon as I hit ~18 PSI, the wastegate

opened and all power was lost. So a boost elbow can make a

tremendous difference in your boost levels.



Rapid Rick - yep, that 03 Cummins sure laid down some

dissapointing numbers, and I was truly surprised, until someone

reminded me that in KommieFornia, they can't sell the newer HO

trucks, so that one was the 235 horse rated motor (don't know if

they still use the ETC designation or not).

 

[HVAC]

No Lock Up

Tom, that "03 Dodge isn't going to show good numbers without being able to lock up the converter. It's prolly off 25%. A auto truck with a switch for lock would prolly do 205 or so based on a 235 flywheel rating.

 

[TomGolden]

Ahhh very good point Nowel. I hadn't even checked it to see if it was an auto or manual transmission. I just know it couldn't have been

an HO 6 speed truck