Engine/Transmission (1998.5 - 2002) Dyno #s....what next?

[MrDiesel]

Here are my Dyno Jet numbers from 8-4-07 with mods listed in the sig. I thought some might want to compare notes, also I'll take any input any one might have to add. What do you think I would have to do to bump it over 500?



All runs were done in 3rd with the converter locked. The truck had 1/2 tank of fuel and I added a 32oz bottle of PS Centane Boost. I shot it with straight washer fluid (because evidently 5 working days is just not long enough for Snow to ship me some Boost Juice). Comp on 5x4, 285 BFGs.



Motor only: 356/653



Motor/Comp: 457/808



Motor/Comp/Water-Meth: 482/836



The operator told me the runs were made in the "standard" mode, what ever that means. He said un-corrected numbers are often much higher. Also the dyno measures HP only, and uses a formula to determin the TQ. Could that be why my TQ numbers look so low? I hope to get on it again in another month and try some boost juice, different settings on the Comp and maybe my Smarty.

 

[Joe Mc]

See signature. Note Spring Fling Dyno numbers this was with mods listed and Comp on 5/5 - No billet stuff in trans. Seems like the Mach 5's and 64/14 really made a difference. W/stock turbo and Mach 1. 6 w/comp on 5/4 it did 387/720 @ Fall Brawl 06.

 

[MCharlebois]

nice numbers,how much boost?

marcel

 

[MrDiesel]

About 45-47 #s

 

[bbodammer]

Here are my Dyno Jet numbers from 8-4-07 with mods listed in the sig. I thought some might want to compare notes, also I'll take any input any one might have to add. What do you think I would have to do to bump it over 500?



All runs were done in 3rd with the converter locked. The truck had 1/2 tank of fuel and I added a 32oz bottle of PS Centane Boost. I shot it with straight washer fluid (because evidently 5 working days is just not long enough for Snow to ship me some Boost Juice). Comp on 5x4, 285 BFGs.



Motor only: 356/653



Motor/Comp: 457/808



Motor/Comp/Water-Meth: 482/836









The operator told me the runs were made in the "standard" mode, what ever that means. He said un-corrected numbers are often much higher. Also the dyno measures HP only, and uses a formula to determin the TQ. Could that be why my TQ numbers look so low? I hope to get on it again in another month and try some boost juice, different settings on the Comp and maybe my Smarty.

It's surprising that you weren't over 500 with that setup. Maybe add a smarty? My setup with the 4's put down 528/1085 this summer. I ran on 3x4 (non drag box) and smarty on 8. This was in overdrive and with Goodyear 315's and about 42 lbs of boost. I would think that just a comp box and 4's should put you over 500 and 1000 TQ... just my . 02

 

[NoSeeUm]

Torque = 5252 x HP / RPM



If you made your Hp higher in RPM the torque will be lower and vice versa.



The charts I have seen show torque peaking lower RPM than Hp peaks then slowly dropping off as Hp flattens out before the high RPM defueling occurs.



Mind posting your dyno chart?



Jim

 

[MrDiesel]

Torque = 5252 x HP / RPM



If you made your Hp higher in RPM the torque will be lower and vice versa.



The charts I have seen show torque peaking lower RPM than Hp then slowly dropping off until Hp flattens out before the high RPM defueling occurs.



Mind posting your dyno chart?



Jim

OK I guess I skipped that day in math class do you mean 5252 x HP DEVIDED BY rpm? I'll try to scan the best dyno chart tomorrow and post it if I get a chance, I don't have it with me right now. Keep the input comming, I kinda thought the numbers were on the low side myself. The guy running it said a lot of people use what they call an "un-corrected" number and that reads a lot higher???

 

[NoSeeUm]

OK I guess I skipped that day in math class do you mean 5252 x HP DEVIDED BY rpm? I'll try to scan the best dyno chart tomorrow and post it if I get a chance, I don't have it with me right now. Keep the input comming, I kinda thought the numbers were on the low side myself. The guy running it said a lot of people use what they call an "un-corrected" number and that reads a lot higher???

Yeah, sorry... .



T = ( 5252 times Hp) divided by RPM



Depending mostly on altitude and temperature, you could expect un-corrected to be lower than corrected. The standard conditions are based upon being at sea level at a standard ambient temperature / humidity are used to compute a correction factor (more funny funny math).



Corrected Hp = Un-corrected Hp times correction factor



Jim

 

[Fishin Guide]

Shouldn't the run be in OD?



Dave

 

[johncameron]

Shouldn't the run be in OD?Dave

That would load your turbo more, for sure more torque, not sure about HP.

 

[BlitzkriegSSII]

I have about the same setup as you. Mach 4's, Comp 5X5, Snow II on windshield washer, II SPS 62 ~47#, FASS 150, Stock size tires, I put down 566. 54 hp and 1120. 00 ft. lbs. I ran my truck on a Dynojet, by Diesel Performance Motorsports. It was in 4 and locked up. The temp was 88 and 45% humidity.

I also ran the truck in 3 and locked but only put out 528. 37 hp and 851. 42 ft. lbs.

Then i ran 4 and locked with the Snow kit off and put down 527. 45 hp and 1084. 61 ft. lbs



I also ran my truck on a Mustang Dyno by PowerDyne. I had every thing but the Snow kit installed, and put down 529. 6 hp and 1049. 4 ft. lbs. When i ran on the Mustang dyno they had me run the truck in 3 and locked. Not sure what the weather was but i know it was colder some where around 60-70 and i had 315 75 R16 on.



I would think you would have higher numbers than what u got.

What kind of dyno were u on?

 

[MrDiesel]

I can't figure out how to convert the scan to a form TDR will accept... I think when I go back next month (scedule permitting) I'm going to run it in OD and lock the converter so it can't drop out. I will also be playing with 5x5 on the box, trying a brand new box from Edge, and maybe seeing what Smarty does to it.

 

[NoSeeUm]

I can't figure out how to convert the scan to a form TDR will accept...

I scanned mine then converted it to a jpg. You have to have a website to post the file onto. Its a hazzle, don't sweat it. Your torque numbers seem low is all.



#ad




Torque = 795 @ 2500 rpm

Hp = 383 @ 2750 rpm



These numbers are un-corrected I believe. The 2750 rpm defuel is very easy to see. Dyno was in 4th gear @ 4200 feet.



Edit: Dyno was with Mach 1's



Jim

 

[MrDiesel]

Some thing's not exactly right... my curves are identical. Although my defuel is very obvious also. Starts about 3100, drops, spikes at 3200 then down again... . Anxious to try again... .

 

[BlitzkriegSSII]

That may have something to do with the Comp box, the drag up date starts to defuel later in the RPM band.

 

[NoSeeUm]

Some thing's not exactly right... my curves are identical. Although my defuel is very obvious also. Starts about 3100, drops, spikes at 3200 then down again... . Anxious to try again... .

#ad




I got out of it at 3000 rpm.



Another characteristic is the relatively flat Hp line about the same time the torque peaks. Because Hp is flat lining the torque drops (per the above formula) as the rpm continues to increase. This a very noticable in almost all dyno charts I have looked at where fueling boxes are being used.



A stock torque curve is interesting. The torque peaks at about 1800 rpm and drops from there as the rpm's increase. This is very good when the engine is used to tow. Because as the engine rpm drops, from lets say 2200 rpm to 1800 rpm, the engine makes more power and more power as it approaches 1800 rpm. More power as the rpm drops means it gets harder and harder for the vehicle to slow down. What is not to like about that?



Looking at the chart above, I would have be over 2450 rpm to get the same effect. That rpm is a little fast for towing. On the other hand, the torque is at least 300 or so higher than a stock tune so the effect is nulled out by simply having more total torque.



Jim