That is exactly correct. I did not appreciate the "bogus" comment. I posted what was documented on the dyno sheet and I posted the dyno sheet to back it up. I did not claim to be an expert in this field. How one interprets the numbers is their business. I had the dyno run done to share what I have seen with my truck. I felt like I owed the board something for all the info it has provided me. I have learned one thing, from now on I will keep my info to my self. I have never said one negative word about anyone on this board, Feel free to perform a search to prove me wrong. I use this board as a tool to learn from. I am sorry if my dyno has caused some people problems. I will not make this mistake again.

Thanks!!

 

Whatever..

If you're going to get disgruntled when someone tries to give you helpful suggestions, then I don't know what to tell you.

SAL

 

collins

Ease up ... After some experience with dynos, anyone who has actually driven a truck on the dyno can make the spikes large or small. Typically the highest point of a smooth arc is considered the peak horse power. Another way to think about it is the smoother the curve the more time you get benefit of that incredible horse power.

Nerves around here have been on edge for a while and the tension of today has magnified all this.

Lets ALL agree to TRY to read posts here in the BEST possible light.

Sals use of bogus may have been a little ove the top but I dont think he was saying you or your dyno was bogus...More likely the Dyno operator did a bogus job of printing. if you watch the guy work a recent version of the dynojet software they can manipulate the scale and postition of the numbers on he chart before it is printed. Sals point was likely that the dyno guy did you NO favors by the way he presented the numbers

Doug

 

collins8 as our good moderator and Sal has stated your spike is not a true #. That is convertor lockup causing that. JDM could have given you a program that stopped that.

Your true power is approx. 390 rwhp max! What is so wrong w/ those #'s? They are amazing as well!!! Way to go! 390 ROX!

BTW, your true peak tq #'s were probably closer to 458, but your 2nd run was started quite late in the rpm range. Max tq is acheived around 3,250. You could do your run in 2nd and start off at 0 rpms and work your way to redline, but your #'s would be slightly lower, although they would let you know where you make your peak tq at and it wouldn't be so peaky looking at the lower rpms from where you kick it (full throttle).

BfB

 

Sweeeet!!!!!

According to the spikes on my dyno, my truck made 418 rwhp!!!!!!!!! In the real world (w/o spikes), my truck dyno'd at 385 rwhp with the same mods (and then some) as collins8.....

Oh well......... I can dream

 

Hey Sal
Your remarks and suggestions were 100% accurate and should by no means have been taken wrong..

You know me though, I'm just chomping at the bit to respond in depth to this thread ...LOL ...but I'll behave..

Concerning todays unthinkable events, if anyone has friends or family in need here in the S.Fla. area please do not hesitate to contact me as I will do all I can to offer assistance..

To those of you who have suffered a personal loss ..Please..Please know that on behalf of my family we offer our deepest sympathy

Paul

 

Hey Rob,

I congratulate you on your dyno numbers.
After going over the chart I noticed the lower power and Torque numbers were done a year ago.
The higher numbers were just done a few days ago.
Sence they used the same graph on both dyno tests it is easy to see the gains from you mods even with the spikes.
As other people stated it is lock up.
In my opinion, sence it is a comparison, the numbers are real.
The one from a year ago shows the spike with the higher HP figure 343.6 .
The one from just a couple of days ago show 414.9
You started your run 3200 a year ago and you started your run at about 3600 this year.
That show why the lock up spikes have moved over 400 RPM's
There are two reasons why you would have gone into the negitives on the dyno chart.
One is after completing the dyno run instead of letting the dyno wheels slow the rear wheels down you hit your brake peddle.
Or two if the engine stalls at the end of the dyno run.
This is just a sign that the rollers slowed down to fast.

I applaud you in your effort to show us the gain that you have made in your Lightning sence a year ago.


Jim@JDM

 

It's a little thing called "interpolation". Where the torque convertor lockes up basically drawn a straight line inplace of the squiggly points. This will give you a nice smooth graph that everyone is accustomed to and truer representation of you actual numbers. BTW, great numbers.

 

I agree with the good numbers and applaud your desire to share the info with everyone on the board. I dynoed the long tube headers and took a little heat cuz they only made 10-12 rwhp (7 peak rwhp). I hope the time and expense helped others make decisions for their trucks.

It seems that we all should be a little more careful with our words at times. Keep posting, there are alot of us who truly appreciate the info and the tuner's interpretations.

At least nobody made the "dyno queen" comment...yet.

 

Hey buddy, do you have those graphs comparing the two or possibly your pep view files you can share? 10-12 across the board is a major step up, although some don't see it that way. At peak if the vehicle ONLY made more power just there, then no, but your's obviously did it nearly across the board 'eh?

BfB

 

Is this a better graph???

 

BfB -

I have the graphs and can get the files. I'm hopefully going to get to the dyno to do a run with my newly installed BABolt TB.

I'm working from memory so don't hold me exactly to this. My maximum gains were down low around 3300 rpm. they gradually diminished until they were 7 rwhp at my peak hp reading. That is to say at 5400-5500 rpm I went from 376 to 383plus.

Tried to send you an e-mail but that is blocked apparently. If I weren't so lazy and dumb to figure it out I would post the files or graphs (I do have them scanned). Guess I better get my 12-year old son to help me so I can make better post!

Might have been a little more HP if some circumstances were different. Let me know and I will happy to share anything you would like to see.

I'll do the TB in the next week then I will put in my new flip chip, electric fan and pulley and track the dyno results.

I'm not a dyno queen but I think it is a very useful tool.

 

Hey collins8,
Don't feel too bad. When I posted my stock '01 L #'s here, I was told how low they seemed by a few of the higher dyno# stock '01 owners.... until I showed my dyno sheet to Sal and he noticed that the dyno operator didn't start sampling until 4,100 rpm's!! Talk about missed out on Torque! I was glad to learn from him, what I did not see with my own lack of experience. Thanks Sal.