So I'm supposed to get the Vette dyno tuned today and while I'm waiting I thought about what our DA here in Havasu is and how will it affect the numbers plus the wind is blowing.
I looked up our stats and it said
elevation 1000 ft (varies from 875 ft as where you are)
DA at 1600
So is that good, bad, average, indifferent

I'm ready for a lower number already as the dyno used at the shop is a Dynamics Dyno or as called by some "The Heat Breaker" LOL.
NSF

 

Soooooooooo.......what did you get? A6 correct?

 

Well, fairly heart broken but I'll still fess up.
Car is a 2011 GS A-6 29000 mi. Kooks headers 1 3/4", with catted X pipe, new plugs, MSD wires and the Corvette Mods intake shroud.
Tune was on a Dyno Dynamic's dyno and it deserves its nick name.
363.7 rwhp, the torque I don't have right now,
It sure doesn't feel like that but I'll not tell a lie about it. Maybe read on the web about this particular dyno and why its called "The Heart Breaker"
Going to start drinkin now
NSF

 

Thats what correction factors are for. Your SAE numbers are not what you car made in that DA, but on a theoretical sea level certain temp, certain weather conditions.

So DA does not effect corrected numbers, it effects

 

NSF, it's been my experience personally and through research, that every dyno hates automatic transmissions. I think you have to have the stall converter unlocked for a better number.

 

A dyno is just a tool to measure ...take it to the track ...if you pop of 12 second quarter mile with a good mph then you will have a pretty good idea what hp your car is making .....

 

I'd probably embarrass myself Dave Been a lot longer than you since I had it under my tires, a LOT LONGER
Thanks for your help and nice video of you burning up the track
Bobby

 

I thought the same Bobby.... but except for the one time I was caught sleeping it was like riding a bike....lol

Hey with our cars , all we have to do is "stab it and steer it" and try not to blow the tires off of it .......

Dave

 

​​​​​​All dynos are different and not something to stress over. Before and after numbers are the only results you should concern yourself with. Look at it this way. You have a very simple and common build. Unless your tuner was incompetent, your car isn't making any less than any other car with the same mods.

 

I never look at dyno numbers for power, I use it to make sure the tune is correct. Like mentioned go to the track and do not worry about a hard launch....you can roll out softly. All you need is the mph and the weight of your car which you can get on the scales at the track to get specific weight.

Wallace racing has some great calculators , just select the calculator "HP from 1/4 mile mph" and you will get a very good idea where you are. If you car has tires and leaves good then you can use "HP from 1/4 mile e.t" however since most people are not dragging all the time and are inconsistent I find the mph works best. Since the mph is typically within 1-2mph whether you hook hard or blow the tires off its a very good gauge!

 

Thanks guys, I just needed a hug I know numbers are just that, but I was expecting 400 rwhp but as the saying goes, it is what it is.
I'll drive it and enjoy cause I know its faster than pre headers and tune
NSF

 

saw this on another site, shows numbers from a Dynamics dyno and dynojet... sounds like the dynamics reads low. i had my old car dyno'd on a mustang dyno and those, around here, are also known as heartbreakers

 

There is a dyno jet in my area that reads just as low as a local mustang dyno. Just use the same dyno everytime.

 

NSF ....

We have basically the same car ... 2011 GS with A6 and catted headers with tune.

Bone stock, on the DynoJet, mine made 371 RWHP / 364 RWTQ (corrected to SAE standard conditions)

With the catted headers and a tune, it made 405 RWHP / 401 RWTQ (corrected to SAE standard conditions) on the same DynoJet.

That's an increase of +34 RWHP / +37 RWTQ
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If you figure a 15% drivetrain loss in HP and TQ for the A6 cars, that 405 RWHP / 401 RWTQ equates to 477 HP / 472 TQ Net (as what would be "advertised" HP and TQ).
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BTW ... As I said, the DynoJet (if properly operated) corrects to standard SAE environmental conditions ... what it cannot do is correct for timing retard do to very hot operating conditions. If your getting knock retard during a dyno pull, your just going to get lower HP numbers ... and the DynoJet cannot correct for that.


Notice the 'Run Condition' of 100.31 degrees F. (but again, the high temp gets "corrected" to "standard SAE J1349 temp" of 77 degrees F. when displaying the final HP and TQ numbers you see here)




.

 

NSF ...

I re-read your post again. Everything I mentioned above has to do with the "DynoJet" dynos ... I can't comment on the "Dynamics" dyno" since I know nothing about them.

 

Turbo:
Your numbers are what I was hoping for but whatever, mine runs a lot harder, sounds a lot meaner now, so I'm happy. I'm not a racer so I'll never know how it would do on a track.
My pleasure is the feel and sound so all in all satisfied, and that's it for mods for me, all in , done, well, maybe
I learned a lot in this adventure on the install, and the tune
Lots of info from members also
Bobby

 

You have a beautiful grand sport that now sounds as good as it looks. You don't need a hug, rather a chest bump!

 

NSF just rest easy knowing that you are now driving a car that will rip off a low 12 second pass no matter what the dyno numbers say .....yet cruise comfortably anywhere you want to take it

If you want a dyno number go find one of the other dynos ...lol .

 

I'm old, a chest bump might injure me
I tell my 3 sons that, don't hurt me please, I'm fragile ha-ha
Maybe a fist bump would be OK.
I just took it out for a quick spin and wow, its a different car now
No CEL's, trans shifts correctly, temps are good, no alert messages on the DIC, so good to go, now where's that drag strip
I would love to make a couple of hits before I croak
NSF

 

NSF...... I am with you on doing mods and looking for the "seat of the pants feel" I do race but not really the GS. I drag my '69 vette a lot because thats what I have it set up for. However when I did the headers and had the GS tuned I did not care nor did I want to spend the money on a dyno tune. I was looking for an improvement on how it felt on the street. As far as my butt dyno is concerned it did pick up a good bit and I am very happy! I may do a mild cam next year but for now I am extremely pleased with the results.

Its very easy to get caught up in the Dyno game, a lot of the younger kids in my area are always concerned with how much power their car makes and talk about what it made on the dyno but not many of them actually race their cars. The ones that do race either cannot drive or dont have the car setup for it and make horrible e.t's I have a few buddies that have some pretty sick super charged Mustangs that make big power on the dyno, however I have wiped the floor with them in My Grand National. It does not make the peak power their cars and others do but it drags their ***! I just laugh when they try to figure out why they lost and make more dyno power Same goes for some of these high powered turbo imports....lots of peak power but they are staring at the tail lights of an old *** G body! Again I use the dyno for tuning and noting else.

Like mentioned if you can hook your gonna bust off some solid low 12's which is faster than a lot of cars on the street!