[redbaron]

Originally Posted by What5647

But are dynojet's accurate?

If you research them a little, they show consistently higher HP numbers than most other dynos out there. Just about everyone I've talked to says that you can't brag about dynojet HP values. And FWIW, I don't think anyone should brag based on dyno numbers...any shop can "tweak" a dyno to read higher than it ought.

Supposedly, these eddy current dynos are "better." What I do know is that they're more useful for tuning, and that's the biggest advantage of a turbo.

All this being said, I'm looking to get my car dynoed before I get a tune. I want a baseline hp/torque curve to crunch some numbers on. After the mods are on the engine, I'll repeat, calculate the shift points that give me the most area under the curves, and setup some shift lights accordling. Overkill? Perhaps, but it's awful hard to watch the tach and autocross at the same time...

Well, dynojets will typically read 10-15% higher than say a dynodynamics or mustang, but probably 10-15% lower than dynapacks. Also, the way dynojets are set up you can't really fudge the numbers unless you tweak with altitude & weather correction values (if you leave 'em correct it'll be pretty accurate). Load dynos like mustang & dynodynamics can actually fudge the numbers more easily, but they do load based stuff so you can tune by cell which is quite handy.

I'm probably going to be doing some tuning on a dynodynamics, but I'm going to go and put up numbers on a dynojet because they're consistent nationwide and they'll be a little higher.

Getting a before & after pull isn't necessarily a bad idea, and you can certainly set up shift lights to be the most productive. I like to go far enough past the curve so that when I shift i end up back close to peak torque on the new gear. Honestly though, if your car is bone stock, you might as well just use an existing dyno sheet from another stock car that dynoed at the same place.

Also, if you're going to mod it, aside from seeing how much wowie zowie power you picked up, the after dyno sheet is the only useful one I only believe in before & after if you're trying to compare against a couple different brands of the same part.

[What5647]

True, I could just look at a stock dyno sheet from another Sky, but I guess I'm just curious. Maybe it's the engineer in me.