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Thread: Need tune for ORY?
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05-10-2011, 03:13 AM #1
- Join Date
- Apr 2009
- Location
- Sanford, NC
- Posts
- 41
Red- 2000 Pontiac Firehawk
Need tune for ORY?
I recently put a ORY on my car. DO I need to tune the car so that it does not run as rich or will it be fine for my motor without a tune for a while?
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05-10-2011, 03:32 AM #2
Any mod that enhances airflow through the engine has an affect on fueling. The upstream O2 senders and MAF are able to compensate for these differences, however, your volumetric efficiency (VE) table will not be as accurate as with the stock exhaust.
If you have access to a scanner you can see your long and short term fuel trims. These should hover close to zero which means that your PCM is not adding or subtracting fuel to or from the engine. Anything greater or less than than a steady + or -5 to 8 on the trims is probably indicative of the need to recalibrate the VE table.
Someone with more tuning experience can most likely provide a better response.
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05-10-2011, 05:05 AM #3
- Join Date
- Nov 1999
- Location
- over here...
- Age
- 45
- Posts
- 25,709
[]D [] []V[] []D- 1999 trans am
yes... unless you've already had the rear 02's tuned off you'll need that done...
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05-10-2011, 08:10 AM #4
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05-12-2011, 04:25 AM #5
- Join Date
- Jan 2010
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- East of Cleveland, Ohio
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- 3,827
Black- 99 WS.6 - Modified
How long is a while? I know quite a few people who have installed LTs and an ORY, and haven't had their car tuned. No problems except the pesky SES light. To take full advantage, and make the engine run the most efficient, you would benefit from a tune. But if you plan to do some other mods anytime soon, I'd wait to get the tune until after you do them.
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05-12-2011, 06:35 AM #6
- Join Date
- Jul 2009
- Location
- North of the Motorcity
- Posts
- 2,612
Custom Swirly Black- 2001 WS6 M6
Forgot to mention, site sponsor and member 'Frost' does mail order bench tuning for mods like LT's, ORY and a long list of others. Check out his site.
http://www.tunedbyfrost.com/
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05-12-2011, 07:09 AM #7
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