Competition which dyno has the true readings.

[Evil Otto]

which chasse dyno would you recommend for true numbers. some thing that will hold high hp and torque. i got a friend that interested in buying one. and high hp and 1/4 mile runs is what he is looking for.



ED

 

[Timbeaux38]

My vote goes to the dynojet. That is what the garmon camp and Fletcher use for tuning, and they are the fastest street trucks out there.

 

[KLockliear]

I'd guess that depends on what you want to do with the dyno. For measurement of HP and tuning changes, the inertial design of the Dynojet makes testing extremely repeatable, consistent and quick.

 

[seriousdiesel]

Was just checking on dynos yesterday... ... the guy at Dynojet talked lots about the new ( or fairly new ) 224xlc which is a 24in drum capable of inertia or eddy current load of 1000ft lbs. I just seems to me that the way to get turbos to work the best Is by loading the engine. Wether that makes a difference in hp or not, I do not know. H also said that they have a 248HW which is the same as the famous 248 only the HW designation is Heavy, Wide. Its a heavier drum and is wide enough to take a dually pickup easily. He said that it was specifically designed with turbodiesels In mind.

 

[JVolpe]

I have used both, I try to use the same DynoJet that is close to me for evaluating and tuning changes. I have a base line on that dyno and have used it about 7 times this year. However that shop is LS oriented and no optics for any torque, so hp numbers only.



This so far is my very favorite last Friday:



#ad




#ad

 

[DieselTweaker]

Mustang Dyno

you might want to check out what mustang has to offer http://www.mustangdyne.com/index.htm



and also check out this video. I'ts from mustang's website Wondering what a 177mph, 7. 92 sec. pass looks like on a mustang dyno? watch the video!

 

[Jim Fulmer]

So I see the dynotex folks came down there! They are 2 hours from me and said (bring it down) when I wanted to re-dyno after the last event as they can set it up at there house... ... . can't beat that!



Jim

 

[JVolpe]

Yes, Mr. Fulmer they had your run displaying while setting up... . Kinda made me feel inadequate.



That was the most knowledgeable dyno operator I have used. I drove and he was in the cab and could use the dyno break to load the engine and start the run from what ever rpm and lockup point I wanted. About 3 1/2 hours from me, but almost worth the trip compared to the one that is about 4 miles away.

 

[BPonci]

Has anybody ran on a superflow dyno? The reason i ask is there is one in are area that just opened the doors to the public.

 

[DRAG DIESEL]

Has anybody ran on a superflow dyno?

Yup. If you got big chargers and need to get them lit before your run, this is your dyno.

 

[COMP461]

super flow 901 engine dyno.

 

[RacinDuallie]

super flow 901 engine dyno.

Greg, People here are more concerned with dyno readings at the rear wheels- not flywheels... .

 

[COMP461]

If all you want to do is have a dyno sheet to hold in you little hand and gloat, that would be cool. But I dyno for a different reason , that is I want to make more usable power that will propel a drag racing truck or dragster down the track. A chassis dyno is totally worth less unless its can hold the motor in one place and accelerate it the same RPM per second climb every time. I hear that Dyno dynamics can, but never have got to play with one. With a chassis dyno if you make more power it accelerates the wheel faster. What did we really learn, that would be useful at the track. A little, but so much is left on the table.





EXAMPLE;

A particular motor makes 600 hp at 500 rpms per second accelerate rate, on a given chassis dyno, if you pick it up 40 hp with a new gee whiz device , and now it prints 540 hp, you have increased the RPM’s per second by a given amount for it to register that gain, that’s the way it works.



But what if you wanted to see what the motor did at only 500 rpm’s per second, or 250, or 1000 rpm’s per second, you’re out of luck. Why would you want to know this, well its simple that might be the rpm’s per second you truck accelerates going down the track in a pedicures gear.

Well maybe you gee whiz device makes more power at in low gear at 1000 rpms per second with it on stage 99, but at that setting would smoke the pistons out the stacks in high gear where the motor is laying on the converter at a lazy 250 rpm’s per second.



What did this teach you , and how do you use this to make you truck go faster, well the old way you ran the whole track once at 99 and when it prayed to the aluminum god, you kicked the side of the truck and loaded up your toy and went home. This makes you do several things on Monday morning after the tow home.

First you call the manufactory of the gee whiz device and cuss them out , second, from now on you run it much lower setting where its safe , and run the whole track fairly good , and safe. But what you never knew is you could have run first gear at 99 safely. Why, because at higher acceleration rates you build less piston melting cylinder pressure and this knowledge lets you gained a tenth in you 60 foot and total or 2 tenths in the pass.

 

[Dockboy]

which chasse dyno would you recommend for true numbers. some thing that will hold high hp and torque. i got a friend that interested in buying one. and high hp and 1/4 mile runs is what he is looking for.



ED

Greg... ... . I see you can't read niether



You get that thing running yet Ed?

 

[Jim Fulmer]

Yes, Mr. Fulmer they had your run displaying while setting up... . Kinda made me feel inadequate.



Stop cussing at me... ... it's Jim not Mr. Fulmer..... dang I'm only 40!



Yea there all good, I'm going to have to go see him again soon.



Jim

 

[Mhannink]

If all you want to do is have a dyno sheet to hold in you little hand and gloat, that would be cool. But I dyno for a different reason , that is I want to make more usable power that will propel a drag racing truck or dragster down the track. A chassis dyno is totally worth less unless its can hold the motor in one place and accelerate it the same RPM per second climb every time. I hear that Dyno dynamics can, but never have got to play with one. With a chassis dyno if you make more power it accelerates the wheel faster. What did we really learn, that would be useful at the track. A little, but so much is left on the table.





EXAMPLE;

A particular motor makes 600 hp at 500 rpms per second accelerate rate, on a given chassis dyno, if you pick it up 40 hp with a new gee whiz device , and now it prints 540 hp, you have increased the RPM’s per second by a given amount for it to register that gain, that’s the way it works.



But what if you wanted to see what the motor did at only 500 rpm’s per second, or 250, or 1000 rpm’s per second, you’re out of luck. Why would you want to know this, well its simple that might be the rpm’s per second you truck accelerates going down the track in a pedicures gear.

Well maybe you gee whiz device makes more power at in low gear at 1000 rpms per second with it on stage 99, but at that setting would smoke the pistons out the stacks in high gear where the motor is laying on the converter at a lazy 250 rpm’s per second.



What did this teach you , and how do you use this to make you truck go faster, well the old way you ran the whole track once at 99 and when it prayed to the aluminum god, you kicked the side of the truck and loaded up your toy and went home. This makes you do several things on Monday morning after the tow home.

First you call the manufactory of the gee whiz device and cuss them out , second, from now on you run it much lower setting where its safe , and run the whole track fairly good , and safe. But what you never knew is you could have run first gear at 99 safely. Why, because at higher acceleration rates you build less piston melting cylinder pressure and this knowledge lets you gained a tenth in you 60 foot and total or 2 tenths in the pass.

well i might get grilled for this but i think hes right

 

[Dl5treez]

If anyone wants to see a true example of just what a chassis dyno can really do, I highly encourage you to pay a visit to a local heavy truck/engine shop that advertises the service.



It's fun to watch, and even more fun to run one.



My preference is to Taylor and Superflow... . but that's what I have the most experience with. There are many good ones out there, and a proficient operator and PROPER vehicle restraining are the 2 most important keys to an accurate run----adequate dyno capacity notwithstanding.

 

[mhuggler]

I agree 100%. I use the superflow dyno where I work(Cat dealer). To get an accurate HP reading on any diesel, you need to lug it down, not rev it up. When your accelerating, the engine is constantly trying to "catch up". It's also very difficult to get good down low power on a dyno meant for a gasser.

 

[Evil Otto]

nope not running yet Greg. pulling it all down this winter.

 

[Evil Otto]

If all you want to do is have a dyno sheet to hold in you little hand and gloat, that would be cool.

comp461

not looking a piece of paper. looking for a good way to tune truck, car, what ever. got a friend that got a little extra money,space and asked me to look into it. i thought a chasse dyno would be a little more customer friendly instead of a engine dyno. i figured more people would rather drive their car or truck on to a chasse dyno then remove the engine to tune. after installing said xyz part,



ED