Ft. Collins Dyno Day April 12th

[K_Arts]

Matt,



I have to agree with Whitmore on this one. Your numbers are pretty low. Which makes me think there could be one of two things wrong here. Either the problem is that this particular dyno is not designed for our trucks, or the operator is pretty new at running our trucks on the dyno.



Here's some food for thought. A typical ETH will dyno at a minimum in the 230 range. There was a stock 5 speed that had a comp on his truck last hear at the Colorado Diesel Dyno days. Stock he dyno'd in the 230 range and with the comp on he peaked a tad over 300 hp. An ETH should easily be in line with this.



What gear did you guys run in, and what was the beginning and ending RPM?



Kev

 

[mgoncalves]

I won't be able to make it to Castle Rock, I have to put a new long block in the mother in laws pickup this weekend. I am very interested in comparing the two different styles of dynos as well.



I thought that an ETH with a comp was supposed to be around 285- 300 hp. That sounds right on for my 275 with winter fuel right? The first run was with the comp on 5x5, and he was just making sure the truck wasn't going to move any at first, then he floored it kind of late (2100 rpm) That would account for the torque being on the low side. I was expceting about 620-630 peak torque. The second run was with the box turned off and he started about 1250 rpm. I didn't think 203/ 436 to the ground from an engine rated at 245/ 505 was very bad, especially with the winter fuel.



I was just there to make sure there wouldn't be any problems with strapping down the truck or getting a rpm reading before we have a crowd waiting there. There wasn't much effort into getting good numbers or anything, I just wanted to make sure the thing worked. They do the driving, it was the first time I've ever heard my own truck at full throttle from outside the cab.



I almost figured out how to post the pictures but they were to big to post I guess, I'll try out the album thing and let you guys know.



Matt

 

[mgoncalves]

OK



I figured out how to make a gallery, just don't know how to post a link to it. The pics are in my gallery, one is of the front of the truck showing the optical pickup and the other is the rear showing the straps and also how wide the rollers are. You can visualize how a dually will fit, they say they have done it before and it's not a problem.



Matt

 

[TPCDrafting]

Help ya out Matt, what time does this shin-dig get going anyway?



#ad




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[mgoncalves]

Thanks!





They will open up shop at 10 am. They are kind of late starters.

 

[K_Arts]

Originally posted by mgoncalves

I thought that an ETH with a comp was supposed to be around 285- 300 hp. That sounds right on for my 275 with winter fuel right?

I totally disagree. Like I said above, I've seen a 5spd with a comp peak over 300 (this dyno was also done on winter fuel). So an ETH should easily be over 300hp. The 274 figure is way low. Personally I've seen a stock ETH Dyno in the high 230's.

I didn't think 203/ 436 to the ground from an engine rated at 245/ 505 was very bad, especially with the winter fuel.

I think that 203 to the ground is terrible. A stock 235hp Auto will dyno in around the 200-210 range... so for your numbers to be 203, this still leads me to believe that either this dyno is not meant for low reving diesels or the operators don't have the slightest clue on how to run the dyno.



Kev

 

[mgoncalves]

If it makes you feel any better about the dyno, using the SAE corrected numbers from dynojet, my numbers were something like 340/ 700 . Those seem way high to me.



Shouldn't an ETH with a pump wire tapping box (comp) have less of a gain than an ETC with the same box? From reading this site, I have learned that an edge comp is worth about 70-80 rwhp on an ETH. That is exactly what my numbers show. I imagine that if the run was done the same way as the one with the box turned off then my torque would be higher and maybe I would get another 5-10 hp (maybe).



My main concern when we ran it was the tiedowns and the optical pickup, since that was what some people were wondering about. I realize I haven't mentioned it yet, but I am not any part of PFI or gaining anything from this dyno day, if it seems like I am pushing things. There are some threads about this particular dyno model, it is considered to give accurate and reproducable numbers between different dynos. Do a search on the dynojet 248 and look for yourselves, the dyno is up to the task. I think the crew at PFI knows what they are doing, they have a seven second rice grinder.



I still stick by 275 rwhp for my truck, that sounds dead on from the research that I have done. With good fuel maybe I could make the 290's. Anyways, I hope everyone can come and give it their best. It's always a good time when there's a group of dieselheads around.





Matt

 

[R.ebel]

Numbers

mgoncalves,

I believe that for comparison sake every body seems to use the SAE corrected numbers. It is true that the SAE correction factor is intended for naturally aspirated engines... ... but since it is the only one available it is likely to be a more accurate representation of the true HP compared to the uncorrected numbers. JMO



He said "Rice grinders":-laf :-laf :-laf :-laf



Thanks for being the test mule and working out any potential kinks before the big day



I've elected to not dyno in Castle Rock due to the Mustang Dyno's having problems with tire slippage on the higher HP trucks.

 

[mgoncalves]

Thanks R. ebel,



I can't wait to see your truck, from what little I know, it sounds awesome. You think maybe I could talk you into taking me for a spin?



Hey, if you guys want to use the "corrected" numbers, have at it. It makes my truck sound pretty tough with those figures.





Matt

 

[K_Arts]

Originally posted by mgoncalves

Shouldn't an ETH with a pump wire tapping box (comp) have less of a gain than an ETC with the same box? From reading this site, I have learned that an edge comp is worth about 70-80 rwhp on an ETH. That is exactly what my numbers show. I imagine that if the run was done the same way as the one with the box turned off then my torque would be higher and maybe I would get another 5-10 hp (maybe).

Matt,



I'm not trying to argue with you, just trying to lay out the facts.



Yes you are correct in saying that an ETC will see more of a power gain then an ETH. But I'm saying that your numbers are way low. According to Diesel Dynamics site, if you look at the dyno charts for the True torque Module, their stock ETC dyno'd in at 212 hp, and their stock 01 ETH dyno'd in at 222hp. Also look at Edge's site. Their stock ETC dyno'd in just a tad over 200 while their ETH did about 225. My stock ETC Auto dyno'd in at 209 (Uncorrected). With DD2's and an EZ, my numbers were 297, 778 (uncorrected).



So why would an ETH dyno in at less then an ETC Auto?? See where I'm going? I'm just trying to help you get some ideas for running the dyno so that when everybody shows up, you guys can try to get the most accurate numbers that you can



Kev

 

[azcummins]

Maybe what we should be after is the best way to dyno on a Dyno Jet 248. Is Joe D the guy to talk to about getting high numbers? If the truck is not loaded, it probably won't make the HP it could. Just some thoughts.

 

[K_Arts]

AZ. . your probably right. Either Diesel Dynamics or Joe D would probably be the best bet on telling everybody what they need to do in order to get accurate numbers on the 248.



Kev

 

[TPCDrafting]

Originally posted by mgoncalves



I can't wait to see your truck, from what little I know, it sounds awesome.

It is one sick truck. Warning, it will give all those that ride in it serious bombitis. Oo.

 

[azcummins]

How to dyno

This is strait from Joseph Donnelley







Joseph Donnelly

Registered: Oct 1999

Posts: 1602

Re: How to dyno?

I suggest running in highest gear (overdrive), and locked up if an automatic. Have the operator punch it at 1250 rpm and let off gently (to protect the turbo) after anticipated peak hp is reached. For most of us that is around 2700-3000 rpm or so; or after the governor starts cutting fuel. That's all, its pretty simple.

 

[R.ebel]

It's looking like we will have some excellent weather on Saturday

 

[KevinK]

Is anyone planning on putting a spreadsheet together that lists all the hp and torque numbers along with the mods on the trucks? It's always interesting to see how everyone's setups perform. If no one else is planning it, I will put the information together for anyone who wants to send me their info after Saturday.



Kevin

 

[jrandol]

Originally posted by KevinK

Is anyone planning on putting a spreadsheet together that lists all the hp and torque numbers along with the mods on the trucks? It's always interesting to see how everyone's setups perform. If no one else is planning it, I will put the information together for anyone who wants to send me their info after Saturday.



Kevin

That is a great idea!!



I can bring my Laptop and we can do it right there if that would work well?

 

[TPCDrafting]

If the weather is anything like it was today, we'll be in great shape!

Good idea on the laptop!

I'll have a stock Cummins as a baseline. But I'm working on that

 

[mgoncalves]

Update!!

Hey guys, we may have a problem. There is some construction going on in front of the building and they have the entire street closed. They started Monday and are supposed to be done by the end of the week. I called the shop today and they can't get any word from the construction crew what the progress is.



So, tommorow I will talk to the manager and we will decide wether we can do the dyno day or not. I should be able to drive up there and take a look at it tommorow afternoon. They definetly have good weather on their side, and Saturday is supposed to be beautiful as well.



Keep your fingers crossed



Matt

 

[jdweber]

stacks?

hello, just wondering if down there they can put a truck on there with dual stacks? i am up here in laramie and will definately be there if they can. thanks, jon