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Old Sep 25, 2008 | 08:12 AM
  #1  
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I am thinking of getting a tune on my 99 coupe. Is a dyno necessary to get the best tune possible?
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Old Sep 25, 2008 | 09:38 AM
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[/I]
Originally Posted by mobman
I am thinking of getting a tune on my 99 coupe. Is a dyno necessary to get the best tune possible?
The technical answer is yes. A Load dyno like the Dyno Dynamics is the more preferred approach for quick tuning across the entire load range and then verified on the street. You need the Dyno to identify AFR, horse power and torque levels at peak, but more importantly torque under the curve to reach the most horsepower across the entire power band.

Mail Order tunes will provide the tuners "best quess" based on how ever many tunes he has performed on similar setups. A mail order tune shouldn't cost more than $150 and I have seen them on the Forum at $99.

Street tunes are OK, but won't provide the same info as the Dyno. They also can be dangerous, because you basically have to drive the car verrrrry aggressively to reach the cells needed to tune WOT area's.

Your mods appear to include a catback only, so you will probably find 10-20 HP.

Good Luck

Ed

Last edited by mowton; Sep 25, 2008 at 11:00 AM. Reason: Corrected dyno type from inertia to load.....
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Old Sep 25, 2008 | 09:50 AM
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Originally Posted by mowton
The technical answer is yes. An Inertia Dyno like the Dyno Dynamics is the more preferred approach for quick tuning across the entire load range and then verified on the street. You need the Dyno to identify AFR, horse power and torque levels at peak, but more importantly torque under the curve to reach the most horsepower across the entire power band.

Ed
Just a technicality here, but I'm pretty sure that all Dyno Dynamics are eddy current dynos not inertia based.

Nonetheless, good info.
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Old Sep 25, 2008 | 10:59 AM
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Originally Posted by LinearX
Just a technicality here, but I'm pretty sure that all Dyno Dynamics are eddy current dynos not inertia based.

Nonetheless, good info.
My bad :o....meant to say load dyno. Thanks for the pickup
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Old Sep 25, 2008 | 02:27 PM
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Originally Posted by mowton
[/I]

The technical answer is yes. A Load dyno like the Dyno Dynamics is the more preferred approach for quick tuning across the entire load range and then verified on the street. You need the Dyno to identify AFR, horse power and torque levels at peak, but more importantly torque under the curve to reach the most horsepower across the entire power band.

Mail Order tunes will provide the tuners "best quess" based on how ever many tunes he has performed on similar setups. A mail order tune shouldn't cost more than $150 and I have seen them on the Forum at $99.

Street tunes are OK, but won't provide the same info as the Dyno. They also can be dangerous, because you basically have to drive the car verrrrry aggressively to reach the cells needed to tune WOT area's.

Your mods appear to include a catback only, so you will probably find 10-20 HP.

Good Luck

Ed
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Old Sep 25, 2008 | 05:32 PM
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IMO street tunes are the best because you get real load in each gear,real drag on the car and the ram air affect which messes with the tune.With it being somewhat dangerous a load dyno is prefered.

My tunes consist od a full street tune followed by a check on the dyno. 99% of the time the street tune is spot on.
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Old Sep 25, 2008 | 09:54 PM
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Originally Posted by mowton
[/I]

The technical answer is yes. A Load dyno like the Dyno Dynamics is the more preferred approach for quick tuning across the entire load range and then verified on the street. You need the Dyno to identify AFR, horse power and torque levels at peak, but more importantly torque under the curve to reach the most horsepower across the entire power band.

Mail Order tunes will provide the tuners "best quess" based on how ever many tunes he has performed on similar setups. A mail order tune shouldn't cost more than $150 and I have seen them on the Forum at $99.

Street tunes are OK, but won't provide the same info as the Dyno. They also can be dangerous, because you basically have to drive the car verrrrry aggressively to reach the cells needed to tune WOT area's.

Your mods appear to include a catback only, so you will probably find 10-20 HP.

Good Luck

Ed

Thanks Ed! Tune probably not worth it at this point (@ $450+).
I put the money in the dyno tune fund till I get some mods done. I am shooting for @ 425hp to the wheels. I really appreciate the info!! This forum is GREAT!!
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