I think the dyno was wrong.

I run 12.43@107 at 7,174lbs.... and the dyno told me 582HP.... I feel my truck needs to make more power than that to run the times I do. On the dyno the twins only make 50psi and on the street I make 68psi.

Don't sweat the dyno numbers... you probably weren't loading the engine as hard on the dyno as on the street.

Lavon
 
My best was 12.81 @ 104.64 mph. Dunbar's dyno put me at 530HP at the time. My truck is a 98 QC 12V, so we should be similar in weight. I weighed 6920lbs that day. I weighed it at the rock quarry before i went to the strip.

Dave
 

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Pete your numbers do seem a little low to me

go to a Mach 7 and add a S400 to the bottom and you will make well into the 6's

i pulled 550hp with Mach 6's and a sled puller 66/14 and a drag comp and then went to the B1-B2 twins and ran a 623hp.....hitting the dyno here again soon to see what the new VP, Mach 7's and the ADR will do.

Scott
 
u should weight about 7200 or so. then calculate it and get 549hp at 104mph
 
Anyone see where he was running PL10 on the dyno. Maxing out the fueling on the dyno usually makes it harder to get up on the turbo(s) to get a good number since it is basically putting out the fire on the botto end. I bet you would have had better fuel only numbers on like PL 6 or 7.
 
haloman said:
Anyone see where he was running PL10 on the dyno. Maxing out the fueling on the dyno usually makes it harder to get up on the turbo(s) to get a good number since it is basically putting out the fire on the botto end. I bet you would have had better fuel only numbers on like PL 6 or 7.
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I tried one on pl7 and it was around the same outcome. I think it was a 3-4hp difference. I see how some guys could just say it's a newbie getting humbled because I'm kinda new here butrI dont feel that was the case. If I would have pulled 530 on fuel and 569 on nitrous I would have taken it. I realize several things can change the outcome. But at full weight plus a few pounds the #'s dont add up.
 
ILLINOISRAM said:
569 hp at 61 lbs boost seems to be pretty close to the 10lbs=100 horse. How much boost did you see on #2 only?
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this statement is totally wrong and bs. no way you can go off of 10lbs=100hp
saw a truck dyno 393hp running 98psi with twins. saw the same truck make 900hp with 60psi. boost is not horsepower. cool dense air is hp.


my old duallie with mach 7s, 2 stage nitrous and a single siver 62 made 713. truck weighed close to 8k and ran 12.3 with that setup. something sounds wrong. a drag come, mach 4s and nitrous should put you over or really close to 600hp.
 
Howd that truck run with 7's and the 62? Hot? Smokey? What are the other specs on a silver 62? Exducer size? Housing size?
 
BigB82789 said:
Howd that truck run with 7's and the 62? Hot? Smokey? What are the other specs on a silver 62? Exducer size? Housing size?
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turbo had 62 compressor wheel with i believe but dont quote me on this a 71mm exaust wheel. ran great. it was the ulimate daily drivable setup for that truck. cruiesed right at 800 and could pegg 1500 no problem with the fuel i had. with the nitrous, never got above 1300 and ran flawlessly. was running a tst comp, power puck combo at the time of the dyno then i went to a sliver bullet 66, redline, and it was much higher but never got a change to dyno that setup, only track times. i mean the 62 spooled so well for everyday driving even with the mach 7s, but with the nitrous was still able to put down big numbers. though it was a great setup to drive everyday with 548hp on fuel and dyno 700hp with nitrous or racing.
 
I question whether or not your nitrous system was giving you it's normal shot of HP. Was your bottle full, warm, and lines purged on the dyno? Your fuel only runs should be consistent dyno or strip, but I have heard of a few guys who have built finicky nitrous setups that don't perform well till the second or third time down the track to get the lines purged and solenoids firing perfect.
 
inline6power said:
this statement is totally wrong and bs. no way you can go off of 10lbs=100hp
saw a truck dyno 393hp running 98psi with twins. saw the same truck make 900hp with 60psi. boost is not horsepower. cool dense air is hp. .
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first of all i said i was told that not that it was word of god. I just thought that the numbers actually halfass matched up with the statement thats all. For the guy who dynoed 393 at 98psi, i would say he needed to work on his setup alot. Whoever worked on that truck needs some more class time. And for the 900hp with 60psi i believe that because of external wastegates and pop of valves for controlling boost. Tim
 
I will re-emphasize several points regarding Dynojets that have been mentioned many times in the past.

1- There really is no "calibrating" that is needed on a Dynojet. If all the sensors are clean, it works. If not, it doesn't work. And when I say "doesn't work" does not mean it reads low, it means it doesn't work!!

2- A Dynojet is an accelerometer. It measures the HP, or work, it takes to accelerate a known weight (the drum), over a given time. You can't "fool" it.

3- If your uncorrected HP obtained on a Dynojet is not within 5% of your trap speed calculated HP, it merely shows your setup is not tuned properly!! It does NOT mean it's reading low!!

4- Doing 3 pulls on a dyno a couple times a year will only produce a number!! It takes hours and many pulls on the dyno to "tune" the truck and get "real" "track driven" HP numbers!:poke:
 
inline6power said:
this statement is totally wrong and bs. no way you can go off of 10lbs=100hp
saw a truck dyno 393hp running 98psi with twins.
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well that makes me feel better about my 460 hp with twins at 54 psi :hehe:.


I definitely understand about the dyno numbers though. Only time I was happy with my dyno numbers was when I first modded the dang thing for free (12 valve). It's been a tough battle since then. :kick:
 
ILLINOISRAM said:
first of all i said i was told that not that it was word of god. I just thought that the numbers actually halfass matched up with the statement thats all. For the guy who dynoed 393 at 98psi, i would say he needed to work on his setup alot. Whoever worked on that truck needs some more class time. And for the 900hp with 60psi i believe that because of external wastegates and pop of valves for controlling boost. Tim
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ha ha more class time. that guy has one of the highest hp cr trucks in the country lol. and that 98psi boost thing was done a few years ago before diesel stuff became more main streamed. never got mad at you for saying the 10 to 100 thing was mearly stateing that its false. never called you a dumb azz or anything did i? just stating that was wrong. sorry for the confustion. next time i will say your statement is wrong, not you.
 
highest hp blah blah dont care!! Dont be a dick. I see you have more hp than me so im sorry. Tim
 
Twins can throw the 1 psi = 10 hp way off.
I have been on two different dynos while at 500 hp +/- with 42-45 psi and a single.
There is no doubt your truck is 6800+ with you inside the way you raced it last.
 
ILLINOISRAM said:
highest hp blah blah dont care!! Dont be a dick. I see you have more hp than me so im sorry. Tim
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ha ha i wasnt being a dick dude whats your deal. all i was saying was that you cant go by that formula. its not right. you can take a single turbo truck, make 60 psi and still make well over 800hp on fuel. its been done already. wasnt trying to be a dick to you, like i said sorry for saying you were wrong just saying that you cant count on that formula. and yes i probably do have more hp than you but never brought that up. sorry.
 
Dang I got a good one going here. Here is the breakdown for those that didn read the whole thing.
mods= studs, o-rings, ats 3 piece, mach 5's, grid heater delete, AD150, Quad ADR, built tranny, TC lockup switch, smarty on stock software, SO vp44, about a 70hp shot of nitrous.

1/4 mile= 12.85@104 at about 7200 pounds on #2 only
Dyno numbers= 475/97x on fuel only, 569/1080 on spray.

I just didnt think it added up.
 
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