Dyno'd my truck for the first time over the weekend. All the info can be found here.
http://dieselplace.com/forum/showthread.php?t=29958

Best number I could muster was a 461.0hp/919tq and was expecting 500ish based on other numbers reported on the forum with similar/same setup. My first run was 451hp/909tq.

Do these numbers seem low? All trucks were dyno'd at a 10K lb weight setting ... tow/haul and O/D lockout was used ...didn't have a tech II. stock, swiss cheesed air box, carter LP and banks exhaust.

Los Lobos, another DP member here ran a VA200 on #2 only and ran a 432hp/93?tq ...with a ATS/co-pilot setup ...(they couldn't lock O/D out on his truck so it was shifting all over the place) so I had an edge in HP but he got me in torque. His 2nd run using water/meth was around 450hp/969?tq ...so while I still edged him out in hp he clobbered me in torque.

Just curious if my numbers are in-line with others have seen and what I should try and do to improve them next time. Would using a tech II to lock the converter make much of a difference? My tires are 295's if that makes any difference ...but Los Lobos has 35's as well.

I also realize all dyno's are different, each truck is different, etc. I am plannign to revisit the dyno again soon and make 3 more passes using my actual weight, etc. to see if the numbers change much.

I think what might account for Los Lobos higher torque is the fact that he was shifting in to fifth.

Yep, if the tranny was shifting into 5th that would do it ... he's installing the O/D lockout this week to prevent that from happening.

I picked up 15 or so hp with a afe over the stock swisscheesed on a dynojet.

Dyno's are fun to play on durring events. They can also be very helpfull tuning. Its also fun to compare numbers for the day and make a sorta competition outa it if all the trucks are run the same. But comparing numbers from differnt dynos is pointless IMO. I rented a dynojet for an hour and was laying down in the low 490 high 480 range with the Xtreme, intake liftpumps and exhaust, 2 weeks later with no changes made I dynoed at mid 450's at an event.

The track is were it matters what #'s you run......otherwise its all just for fun or tuning.

Ratlover,

So you saw 15 hp from the intake mod? I'm still on the fence on changing from stock. Already had the AFE II, primarily for the whistle and, well ... sold it because the paint was flaking off in the inside of the tube and didn't think the minor whistle was worth 3.5 bills. I know all about the air filter study, etc. and came to the conclusion there was no hp to be had in an air filter ...then I read posts like this that make me want to buy one again. Every little bit helps right? :)

Hmmm, sounds like I may be maxed out for hp/tq ...on #2 only ...just trying to see if there are some little things I can do to sqeeze a little more out of her. Trippin recommended the big head WG as I'm running stock ... not sure what to do or if I should be content with what I dyno'd. Personally I think there are better numbers to be had.

I was supprised as heck. I didnt see any difference in track times but i swaped to a factory box that had a new delco filter and was swisscheesed and noticed 15+ hp. I removed the airfilter on the stock box and gained a few HP. Both the track and dyno were smae day ect. Just what I saw. For a guy looking for every last bit of HP I think an intake ect has merit. I duno if a stage 1 style would show the biggest gains and a stage 2 is just more bling or if there is a better performing intake???

If I didnt get mine used I probably never woulda bought it but I'm glad I did.

I've done a bit of monkeing with the wastegate. I dont have a big head......I have some more things I want to try playing with though, I think I may have another nifty Idea. We shall see though. With all the air available via a bottle my motivation to mess with the WG has dropped quite a bit. PM me if your interested and want to do some experimenting, I duno when i will get to it.

When travelling to a 'new' or 'strange' dyno for a dyno day, wether or not the results agree with your home dyno are immaterial.

You are comparing your truck on that day to everyone else's ride on that dyno.

That is about the extent of it's usefulness.

Home Dyno's are where you get to tune in for more power. Too bad they are so far from home sometimes!

Ratlover,

So you saw 15 hp from the intake mod? I'm still on the fence on changing from stock. Already had the AFE II, primarily for the whistle and, well ... sold it because the paint was flaking off in the inside of the tube and didn't think the minor whistle was worth 3.5 bills. I know all about the air filter study, etc. and came to the conclusion there was no hp to be had in an air filter ...then I read posts like this that make me want to buy one again. Every little bit helps right? http://www.dieselplace.com/forum/images/smilies/smile.gif

Hmmm, sounds like I may be maxed out for hp/tq ...on #2 only ...just trying to see if there are some little things I can do to sqeeze a little more out of her. Trippin recommended the big head WG as I'm running stock ... not sure what to do or if I should be content with what I dyno'd. Personally I think there are better numbers to be had.You will benifit from a nice TQ increase by increasing and holding a higher boost number........

Also to get results on a turbo diesel a sufficient load needs to be placed on the motor for a period of time, not just a 3-5 second run.

Most Xtreme equipped trucks dyno in the upper 470-500 HP range and the 950-1050 TQ range.

I would get back on a dyno that has an experienced operator with a TECH II and see what the numbers are. Trippin has made 180 pulls with his truck, he would be the one to ask for testing procedure as he is very methodocal and careful to get repeatable results from exact testing procedures.

Thttp://www.dieselplace.com/forum/images/smilies/cool.gif NY

Can someone explain how a tuner, programmer, ECM, etc. can produce boost over the OEM wastegate limit (22 psi?) ? Isn't the wastegate a physical device that will lift at a specific PSI regardless of the tuner, programmer, etc? Bare with me ...I'm stupid :)

Boost is related to the fueling of the engine.........I used to see 27-28 PSI with a HOT JUICE only..........

I will see 28-31ish with the XTREME........

I have seen the needle pegged beyond 35 psi.........but we don't want to discuss that as we did not blow our turbo up...........:eek:
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I am sure someone could explain it better in the more scientific terms.......

That's exactly the part I'm missing ...if the stock wastegate is suppose to limit boost to a specific psi ...how are higher boost numbers being made ...assuming the wastegate lifts at 22 or 24 psi? ...and if boost is indeed surpassing the stock wastegate ...it doesn't sound to me like the wastegate is doing what I thought they were made to do. If a guy is indeed making 28-30 psi boost with a tuner, programmer, etc. I don't see the point in monkeying with the stock waste gate. Again, I still have on my dunce hat. :)



Boost is related to the fueling of the engine.........I used to see 27-28 PSI with a HOT JUICE only..........

I will see 28-31ish with the XTREME........

I have seen the needle pegged beyond 35 psi.........but we don't want to discuss that as we did not blow our turbo up...........:eek:
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I am sure someone could explain it better in the more scientific terms.......

Maybe you have a weak wastegate spring..........

Add a BIG HEAD..........makes a difference.

;)

The waste gate is a mechanical device that bypasses a certain amount of exhaust gas around the turbo in an attempt to slow it down. Since adding big programmer increases the amount of energy in the exhaust you need to bypass more than what the stock waste gate is set for, this is why you see the pressure rise above stock. The Xtreme tune is set for 30 - 32 psi so if your below that it will make better power if you up the boost into that range. If you need help in adjusting the waste gate give us a call.

Perfect explanation. Now I understand, thanks Steve. I assume a leak-down valve spliced into the wastegate line will serve the save function as a big-head if adjusted correctly?

I'm not sure what boost I'm making as I haven't had time to watch the boost gauge ...been too occupied keeping her between the lines :)


The waste gate is a mechanical device that bypasses a certain amount of exhaust gas around the turbo in an attempt to slow it down. Since adding big programmer increases the amount of energy in the exhaust you need to bypass more than what the stock waste gate is set for, this is why you see the pressure rise above stock. The Xtreme tune is set for 30 - 32 psi so if your below that it will make better power if you up the boost into that range. If you need help in adjusting the waste gate give us a call.

The waste gate is a mechanical device that bypasses a certain amount of exhaust gas around the turbo in an attempt to slow it down. Since adding big programmer increases the amount of energy in the exhaust you need to bypass more than what the stock waste gate is set for, this is why you see the pressure rise above stock. The Xtreme tune is set for 30 - 32 psi so if your below that it will make better power if you up the boost into that range. If you need help in adjusting the waste gate give us a call.
Good Explaination Steve....
Do Juicegrips(TM) come with the TTS EXTREME order?:D

By the way tophog... goto the original thread about the dyno day. I posted the link from the dyno day.