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Old 04-01-2004, 07:35 PM   #1
Mr.Hanky
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Default Road Tune or Dyno Tune?

Which is better in your opinion and why?

Thanks.
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Old 04-01-2004, 07:51 PM   #2
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dyno is much easier/safer to accomplish, but a road tune is free, sans a paid tuner.
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Old 04-01-2004, 07:52 PM   #3
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It depends more on the tuner's experience than the medium from what I have heard. If you have Phil (formerly of TurboXS) road tune you and have me (formerly of Speak and Spell Tuning) on a dyno, who will do better? I'm just being silly, but you get the drift. With all things being equal, I think road tuning is the way to go. A local guy got road tuned by Phil and he still can't stop smiling.
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Old 04-01-2004, 08:02 PM   #4
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Both, Dyno tune first, road tune after.
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Old 04-02-2004, 12:46 AM   #5
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Quote:
Originally posted by AutoSpeedPerformance
Both, Dyno tune first, road tune after.
Just curious why would you do it in that order? My thought is you should road tune it first and then dyno tune. That way you can find tune stuff and you won't have to spend so much time (money) on the dyno.
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Old 04-02-2004, 01:00 AM   #6
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Quote:
Originally posted by dust12
Just curious why would you do it in that order? My thought is you should road tune it first and then dyno tune. That way you can find tune stuff and you won't have to spend so much time (money) on the dyno.
Of course you want to road tune a little first, at least get it in the ball park (saves time). But getting it on the dyno you can get your AFs nailed down and your torque curve looking good (ign timing) pretty quick. Then on the street, tune out any residual knock. You almost always have a little knock once you get it on the street if you've tuned it close to the edge on the dyno. Reason? better airflow to the IC and cooler temps usually. So once tuned up you may have to add a little fuel here and there to take care of that.
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Old 04-02-2004, 03:18 AM   #7
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Default money vs time

If money is not an issue, dyno first, then road.

The dyno is both safer for all, but the engine as well (assuming the tuner has a clue). You will be able to dial things in quicker, and get some hard information about how various changes change power output.

The road tune is essential to get that last little bit, as a dyno can never mimic all the load/cooling characteristics of a real on the road acceleration run.

Larry
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Old 04-02-2004, 07:50 AM   #8
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Interesting read.

Thanks,
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Old 04-02-2004, 08:38 AM   #9
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I would have to agree with Hotrod!
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Old 04-02-2004, 09:48 AM   #10
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No doubt, dyno then road.

If you are only going for one or the other, well, it depends on your mods. If you have an experienced tuner and a "common" set of mods, you'll probably get pretty close in just a road tune session. It takes longer, so you'll pay the tuner more, but you won't pay for the dyno. If you have a bizarre or uncommon set of mods, you really won't know how well you're doing without a dyno, and it will probably take much, much longer.

Basically, a tuner who has tuned 100 stage 4 cars can probably get them within 10-15whp of "best" just by road tuning. The dyno will let them pull out that extra bit.

-Sean
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