Dyno Vs.Drag Strip Testing
- Thread starter 12many
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Smokey Yunik built his own dyno and used it extensively.
33IMP
Well-Known Member
A dyno should be a learning/testing tool, not a device to print out hp numbers to brag about. To bad the dyno shops have to give big numbers to sell dyno time.
I'd rather tell people I have 400hp and have a 11sec. slip, than tell people I've got 700hp, dyno proven! and then have to hide my 13second timeslip.
I'd rather tell people I have 400hp and have a 11sec. slip, than tell people I've got 700hp, dyno proven! and then have to hide my 13second timeslip.
Axactly!
Rmoore
Well-Known Member
The track score board is your number !! Don’t care what a dyno says !! The track score board is the reality !!
yellow rose
Overnight Sensation
In the years that I've been racing sanctioned tracks, & street racing when I was younger, I've never had an engine or a car on a dyno. I've only seen one dyno & that was 25 years ago.
yellow rose
Overnight Sensation
Not sure what your point is. It’s a TOOL. If used correctly, you WILL make more power.
The dyno gets blamed for virtually everything under the sun, but a junk car, piss poor tuning, junk chassis, **** converters...none of that ever happens. Just that the dyno is worthless and junk because we don’t “race” them.
We don’t race torque wrenches either, but they are a tool.
Rmoore
Well-Known Member
Okkkkk lol !! I would love to hear your theory
Rmoore
Well-Known Member
You are correct !! You make my point for me ! Thank you for explaining this to everyone. You are so right!! So take your car to the track an run it ! Running your car can make the dyno a liar ... your car may have a lot more horsepower than the dyno shows !! Or the track will show you don’t have as much as the dyno says !! Awesome response Sir !! I could not agree more !
Rmoore
Well-Known Member
The number one best tool that we all have at our disposal is our own cars !!
Rmoore
Well-Known Member
Really enjoying the new book “Chrysler’s Motown Missile” and really like these couple of paragraphs. Dyno Schmyno, take it to the track and let’s see what ya got!
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Best advice !! I couldn’t agree more !! That’s the see all know all !! The track is where it is
yellow rose
Overnight Sensation
So take your engine to the dyno, and get the numbers.
Stick it in a car, and go to the track.
The dyno says you made 500 HP.
The time slip says you made 410 HP.
Which one lied, and how do you know?
Rmoore
Well-Known Member
Your argument is not with me Sir ! If that’s what you want to do than do it ! With me and most we are going to the track to tune our cars ! That’s what the history showes most of all the great drag racers have done ! As I said before . The reality of what or how much horsepower your engine makes is going to be printed on the time slip you receive at the end of the track ! If you don’t agree with that that’s your business !! I don’t care !! But I do know that I can go to the track as I did this weekend! I watched cars, trucks, motorcycles make runs. I could calculate from their ET’s and MPH and pretty close estimates of what a specific weight and figure how much horsepower a specific vehicle was making !! So once again Sir . If you don’t agree with track testing will tell more than any dyno ever could ! I really can’t believe I even having this conversation with a supposed performance individual !! You Sir are the performance person I have ever y’all with that have disagreed with that !! I can tell you if you read and study most all professional drag racers all will tell you the true measure of horsepower and torque comes from track test ! Bob Glidden, Bill Grumpy Jenkins, Reher and Morrison and Shepard just to name a few ! Sir , there is where your argument is !! The true measure of what you actually have is your time slip. Period end of story ! Once again if you don’t agree !! So what ! Who cares ! You do it your way ! I’ll do it mine! As long as we get the results that we need that’s all that matters ! You just like to argue ! Guess I do to ! But this argument is just so dumb !! In very first post in this thread he show the writing in a book ! In that writing it says the same thing I’ve been saying! Once again contact the author of the book he is showing and explain this incredibly dumb argument you have to him ! Or not ! Lol I don’t care ! Have a great night Sir !
Answer Post #14
If the engine dyno says you made 500hp. And your track slip numbers showes to be 410 horsepower I would say that is almost a dead on numbers. 500 hp less 20% getting it to the ground is actually 400 hp. So 410 is really close . Good job !!
justinp61
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Oh boy, here we go again ……… LOL
My current engine was broke in and tuned on a dyno. It was the best money spent on the build, I’ve said that many times. A dyno is a comparative tool and a very good one.
There was an issue in my valve train that I wouldn’t have found in the car until much damage was done. Plus the tuning saved a bunch of beating on it at the drag strip. Once in the car a little jet adjustment and it was good.
I’m a firm believer that the time slip is where the rubber meets the road. Most guys that I know that spend the time and money to dyno a engine don’t put it in a junk car. It may take some tuning on the entire combo to make it work but that’s part of it.
How many times have we seen guys show off big numbers only to get their feelings hurt? Unfortunately there are engine builders and dyno shops who make money off inflated numbers.
My engine hasn’t ran the numbers the dyno said it should, it’s pretty close (depending what calculator you use) and I’m good with it. Because we used their ignition and dyno headers, with nothing driven off the crank. Plus, the day we ran it the air was great.
The shop owner is a engine builder and drag racer. After all the pulls were done he and I were talking about my car and I told him I was expecting 6.30’s out of it. I asked his opinion, he agreed if the car was right it should run what I was looking for. After much work two weeks ago it ran 6.33. Hell, it may go .20’s this fall. Great if it does but no big deal if it doesn’t as it’s met the goal I set when I started gathering parts.
All this and $1.75 will buy you a cup of coffee in some places.
My current engine was broke in and tuned on a dyno. It was the best money spent on the build, I’ve said that many times. A dyno is a comparative tool and a very good one.
There was an issue in my valve train that I wouldn’t have found in the car until much damage was done. Plus the tuning saved a bunch of beating on it at the drag strip. Once in the car a little jet adjustment and it was good.
I’m a firm believer that the time slip is where the rubber meets the road. Most guys that I know that spend the time and money to dyno a engine don’t put it in a junk car. It may take some tuning on the entire combo to make it work but that’s part of it.
How many times have we seen guys show off big numbers only to get their feelings hurt? Unfortunately there are engine builders and dyno shops who make money off inflated numbers.
My engine hasn’t ran the numbers the dyno said it should, it’s pretty close (depending what calculator you use) and I’m good with it. Because we used their ignition and dyno headers, with nothing driven off the crank. Plus, the day we ran it the air was great.
The shop owner is a engine builder and drag racer. After all the pulls were done he and I were talking about my car and I told him I was expecting 6.30’s out of it. I asked his opinion, he agreed if the car was right it should run what I was looking for. After much work two weeks ago it ran 6.33. Hell, it may go .20’s this fall. Great if it does but no big deal if it doesn’t as it’s met the goal I set when I started gathering parts.
All this and $1.75 will buy you a cup of coffee in some places.
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Rmoore
Well-Known Member
Your argument is not with me Sir ! If that’s what you want to do than do it ! With me and most we are going to the track to tune our cars ! That’s what the history showes most of all the great drag racers have done ! As I said before . The reality of what or how much horsepower your engine makes is going to be printed on the time slip you receive at the end of the track ! If you don’t agree with that that’s your business !! I don’t care !! But I do know that I can go to the track as I did this weekend! I watched cars, trucks, motorcycles make runs. I could calculate from their ET’s and MPH and pretty close estimates of what a specific weight and figure how much horsepower a specific vehicle was making !! So once again Sir . If you don’t agree with track testing will tell more than any dyno ever could ! I really can’t believe I even having this conversation with a supposed performance individual !! You Sir are the performance person I have ever y’all with that have disagreed with that !! I can tell you if you read and study most all professional drag racers all will tell you the true measure of horsepower and torque comes from track test ! Bob Glidden, Bill Grumpy Jenkins, Reher and Morrison and Shepard just to name a few ! Sir , there is where your argument is !! The true measure of what you actually have is your time slip. Period end of story ! Once again if you don’t agree !! So what ! Who cares ! You do it your way ! I’ll do it mine! As long as we get the results that we need that’s all that matters ! You just like to argue ! Guess I do to ! But this argument is just so dumb !! In very first post in this thread he show the writing in a book ! In that writing it says the same thing I’ve been saying! Once again contact the author of the book he is showing and explain this incredibly dumb argument you have to him ! Or not ! Lol I don’t care ! Have a great night Sir !
Answer Post #14 If the engine dyno showes
Totally agree Sir !! As I agree with Yellow Rose it’s a tool ! Only a tool. As you put it Sir where the rubber meets the road and tuning at the track you get your true actual reality check At The Track ! No if or ands about it !! The track is the test that see’s all and know’s all !
A dyno when used properly is a tool, but probably most often used to "brag".
What's the sense of putting it on a dyno, then NOT taking it down the track?
What's the sense of putting it on a dyno, then NOT taking it down the track?
The engine dyno will tell you how much POWER the ENGINE is producing. The time slip will tell you the TIME it took for THE CAR to go from point a to point b. Those are two different measurements. If you use a time slip to calculate the power being produced By THE CAR at the traps then it can be used to tell you how much power is lost between the engine and the wheels for that time duration.
Years ago (1975) my car club toured the Kieth Black facility. He had a Ford NASCAR engine on the dyno at the time. He stated that he was using the engine dynamometer to optimize THE ENGINE and that the car setup would be optimized once the engine was installed. He then had his assistant do a test run on the engine to show us the information that was obtained to help tune the engine.
Years ago (1975) my car club toured the Kieth Black facility. He had a Ford NASCAR engine on the dyno at the time. He stated that he was using the engine dynamometer to optimize THE ENGINE and that the car setup would be optimized once the engine was installed. He then had his assistant do a test run on the engine to show us the information that was obtained to help tune the engine.
I agree the dyno is a tool. Just as, say,an Air/Fuel ratio gauge is a tool. Just one example. Not exactly the same but......Some tune purely by plug readings (also a form of tool: your eyes) and taking the car to the track, or using an a/f gauge and hitting the track. Or some combination of both. So if the theoretical ideal a/f ratios are “X” etc, do your shoot for those numbers and let the time slips fall where they may? Same with plug color, and thorough inspection. That’s not the end of it, you get to ideal quicker for sure. I just posted that blurb because of their successes to that point with no dyno use, their obvious intelligence and abilities on full display etc. It’s impressive. I’ll never hit a dyno though, I prefer building, tuning, tweaking, testing it all myself and seeing what I myself can do. I dont care about the horsepower/torque numbers aspect of a dyno, I use seat of pants and the time slip as my tools but as they say “It’s All Good” 
Indeed a testing tool for AFR, total timing etc.etc. UK dyno's however seem to be quite good for accuracy against real time track results.
2 examples, a known [email protected] ran 137/weight came out to just 4hp less.
And our own '69RR dyno'd@695fwhp, to date we are @664fwhp per weight/mph with same carb, settings plus a full exhaust, with a bit more left in the car.
2 examples, a known [email protected] ran 137/weight came out to just 4hp less.
And our own '69RR dyno'd@695fwhp, to date we are @664fwhp per weight/mph with same carb, settings plus a full exhaust, with a bit more left in the car.
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B3422w5
Well-Known Member
the dyno will tell you how much power THAT dyno says the car makes. Another dyno probably different.
As said, its a comparative tool
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LOL If you had 700 horse you would be spinning all the way down the track. No wonder why only 13 sec. Like the late model Challengers. (street cars) I laugh at them at the track.
j par
Well-hung Member
The track is a comparative tool as well? I mean people don't want to beat it up on the track but they're more than willing to put it on a test machine and let some stranger take test pulls? LOL.... How long does each test pull take? 10 -12 seconds maybe more.. gauges are red - AF gauge horsepower and torque...
On the track you're going to take what a 10-12 second run and read your AF gauge and record your speed and ET...
YES.....
Is this thread going to turn into a fiasco...
On the track you're going to take what a 10-12 second run and read your AF gauge and record your speed and ET...
YES.....
Is this thread going to turn into a fiasco...
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