Dyno and Custom Tune Results

Everybody needs to check with their dyno shop and specifically ask whether they're getting corrected or non-corrected numbers. All the dyno shops in NM AFAIK give you corrected numbers automatically, you usually have to ask to get a printout of both. Maybe it's different where you all live because NM is so high above sea level.
 
MediumD said:
... Maybe it's different where you all live because NM is so high above sea level.

Probably, since a typical correction factor in NM could be in the range of 1.25!!!
 
I think Joey also dyno'd with those heavy rims on his car. More rotating mass to spin.

And I noticed on Walt's runs that day that his 1st run only put down 245.8/255.1

Joey, what was your fuel pressure at? You have a regulator on it, right. You could have turned it up a few pounds and probably pick up a few horses on the upper end for braggin rights.:)

I assume the 02's are fresh. How many miles on the plugs? What type?

JP, I think you are really going to like your ported Gen 1 intake. I've been playing around with mine also. IMRC delete and a second set of injectors will look killer.:shifty:
 
my exhaust smells funny...........oh wait, that was me! :eek: :facesjump :drunk:
 
MonsterMark said:
I think Joey also dyno'd with those heavy rims on his car. More rotating mass to spin.

And I noticed on Walt's runs that day that his 1st run only put down 245.8/255.1

Joey, what was your fuel pressure at? You have a regulator on it, right. You could have turned it up a few pounds and probably pick up a few horses on the upper end for braggin rights.:)

i adjusted his A/F through the MAF transfer function... there was no reason to play with the regulator. as a matter of fact, the car was overly rich when we made our first pull.. the a/f was as low as 11.2 to 1..

It was leaned out to a region that most NA cars like it..

I would like to actually SEE walts dyno sheet.. something where you could actually SEE the lines, not just the final numbers..

PS.. i actually thought about the rim deal too.. but i didnt want to get yelled at in case someone sold him the rims and they were custom special dyno rims :)
 
Kurgan_Motorsports said:
Again, i have dynoed about 300 cars in the last 3 years... most of them are done at speed inc (the dyno we used)... that dyno typically reads lower then others. As a matter of fact, Speed Inc just had a dyno day for some Cobras and everyone complained that their numbers seems low compared to another shop.. It further solidified my theory...


Though I haven't had Bob Kurgan himself tune any of my cars yet (hey Bob I am the Kenne Bell Explorer guy), though I might be taking my LS to him for some "special" tuning here soon. Larry @ Speed Inc. would not let anyone tune there on his dyno if they didn't know their stuff inside and out plus backwards. From all the people I have talked to around here Bob is a very well respected tuner.

BTW, I was the guy that set up that Cobra dynoday that went down on the 6th of May and Bob is 100% correct. Larry's dyno does read lower than most.

Between variables in the dynos amongst other things the numbers should only be taken to get an idea. The best way to see what kind of power your making is to do a baseline run on that dyno and then go back to that same dyno to do your modded run with dynotune. Dyno numbers don't count for squat anyways, the ET is where it counts! :D
 
rocket5979 said:
Though I haven't had Bob Kurgan himself tune any of my cars yet (hey Bob I am the Kenne Bell Explorer guy), though I might be taking my LS to him for some "special" tuning here soon. Larry @ Speed Inc. would not let anyone tune there on his dyno if they didn't know their stuff inside and out plus backwards. From all the people I have talked to around here Bob is a very well respected tuner.

BTW, I was the guy that set up that Cobra dynoday that went down on the 6th of May and Bob is 100% correct. Larry's dyno does read lower than most.

Between variables in the dynos amongst other things the numbers should only be taken to get an idea. The best way to see what kind of power your making is to do a baseline run on that dyno and then go back to that same dyno to do your modded run with dynotune. Dyno numbers don't count for squat anyways, the ET is where it counts! :D

i Do remember you and your explorer. You gave me the opportunity to tune your truck, but our schedules never worked out together and I didnt feel 100% comfortable tuning your truck. I remember hearing about the issues you had on the dyno at the other shop. Not at all their fault, but i know they worked their butts off.. Sounds like they did a good job..

If we can hook up sometime for the LS, let me know..

thanks
 
MonsterMark said:
I think Joey also dyno'd with those heavy rims on his car. More rotating mass to spin.

And I noticed on Walt's runs that day that his 1st run only put down 245.8/255.1

Joey, what was your fuel pressure at? You have a regulator on it, right. You could have turned it up a few pounds and probably pick up a few horses on the upper end for braggin rights.:)

I assume the 02's are fresh. How many miles on the plugs? What type?

JP, I think you are really going to like your ported Gen 1 intake. I've been playing around with mine also. IMRC delete and a second set of injectors will look killer.:shifty:


Yep, O2s are new, plugs are new also - (maybe 1000 miles on them) Also, yes, I had the heavy Cobra R Rims since thats what I drive on normally.
 
Kurgan_Motorsports said:
i Do remember you and your explorer. You gave me the opportunity to tune your truck, but our schedules never worked out together and I didnt feel 100% comfortable tuning your truck. I remember hearing about the issues you had on the dyno at the other shop. Not at all their fault, but i know they worked their butts off.. Sounds like they did a good job..

If we can hook up sometime for the LS, let me know..

thanks

They ran into a slight misrouted vac line that my retarded self had abdsentmindedly attached wrong in my sleepless stupor. :D
 
Calabrio said:
Is there a tuner on the west coast of Florida?




Heck, SCT theirself is BASED down in Longwood there! I am sure there has to be one or two SCT tuners in your area there. Shoot, didn't Chris Johnson from JMS relocate there after the hurricane? I know someone did, but I forget exactly who it was?
 
This is the 3rd pull with STD Correction

STD (Medium).jpg
 
This is the first pull and the third pull together, SAE correction.

(first pull is with a basic chip package, 3d pull is with custom tune)

mark8_overlay.jpg
 
Joeychgo said:
This is the first pull and the third pull together, SAE correction.

(first pull is with a basic chip package, 3d pull is with custom tune)



That is crazy. I have seen many dynosheets but I dont think I ever seen a darn loop-deloop in the line before. hehe. Is that the tranny shifting or something? That would cause a power spike, followed by drop in rpm and then minor loss of power once the shift has completed. Just curious.
 
rocket5979 said:
That is crazy. I have seen many dynosheets but I dont think I ever seen a darn loop-deloop in the line before. hehe. Is that the tranny shifting or something? That would cause a power spike, followed by drop in rpm and then minor loss of power once the shift has completed. Just curious.


Torque Converter --
 
rocket5979 said:
That is crazy. I have seen many dynosheets but I dont think I ever seen a darn loop-deloop in the line before. hehe. Is that the tranny shifting or something? That would cause a power spike, followed by drop in rpm and then minor loss of power once the shift has completed. Just curious.

you see that because I hit the green sampling button BEFORE i floor it as to not miss anything with WOT... alot of dyno operators will hit the green sampling button and go WOT simultaneously... that is the converter unlocking for a millisecond and then relocking back up..
 
Kurgan_Motorsports said:
I would like to actually SEE walts dyno sheet.. something where you could actually SEE the lines, not just the final numbers..
I could see it just fine and clear as day. Heres an OVER contrasted version.

walt260fortheblind.jpg
 
ONEBADMK8 said:
I could see it just fine and clear as day. Heres an OVER contrasted version.


I have a hard time seeing it too Geno.... This one is better
 
Dr. Paul said:
Drilled/slotted rotors DO NOT outperform blanks. Period.


I own/operate an SCCA Improved Touring E-class Mustang. This car will repeatedly stop itself from 165-170 mph every lap at Firebird main course (about once every one and a quarter minutes) The brake setup is as follows:

Cobra calipers (yes, the crappy PBR ones)
Very solid brake ducting
Very good (expensive) DOT 4 fluid
Hawk Blacks or SBC race pads


...drumroll...


and Brembo blanks.


The outgassing mentioned in this thread is not a problem with modern brake pads. Drilling/slotting rotors does the following:

1. Decreases the overall mass of the rotor, thereby reducing its ability to absorb/dissipate heat.
2. Increases pad wear by the holes/slots digging into the pad
3. TREMENDOUSLY increases the chance for the rotor to crack
4. Disrupts the natural strength of the casting because there are now additional stress risers.


If any of you spend any time at a road course, you'll notice that even on uber-racecars, blanks outnumber drilled/slotted by probably ten to one. The only people that have drilled/slotted rotors are (especially) the Porsche guys because those holes are actually cast into the rotor.

If anyone of you don't believe me, feel free to view this thread:

http://corner-carvers.com/altimathread.php.html

This is the 'infamous' thread saved for posterity by corner-carvers forums all about this subject. The folks at www.corner-carvers.com are, IMHO, one of the best no BS locations for hardcore tech on the internet.





With that said, I have drilled/slotted rotors on my silver mustang. Why? Because they look cool. :D

Paul.

I've had this discussion many times with the f150 online guys. There have been good valid points on both sides. (AND OF COURSE THERE IS THE COOL FACTOR) The crossdrilled/slotted do allow for a little more ventilation vs the bare rotor. You can usually see anywhere from 5-7% lower temps on cars with these that aren't being battered to hell and back. However, paul is right about the reduced surface area. That takes away alittle from your total capacity. Whats worth more, a small percentage of your max stopping power, or 5-7% operating temp. Basically, its a wash. The reason I use them is becuase if its good enough for a $150000 mercedes, and a $450000 porsche, then its good enough for me
 
Dr. Paul said:
Congratulations on such a well-thought-out and comprehensive response. Glad to see you at least read the article. (which is where the comment on motorcycles was made)


Anyway, back to arguing about dyno numbers and correction factors...

Paul.
N/P... I try to do my best...:D
 

Members online

Back
Top