dynoing the bonnie, proper techniques? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-11-2006, 12:36 AM   #11
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Quote:
Originally Posted by Rogue
http://www.3800pro.com/forum/showthread.php?t=67

The traction control system on the 2000+ Bonneville SSEi'* can make dynoing tricky. If you attempt to do the dyno without following the below methods the stabilitrak system will kick in and actively attempt to brake the car (it doesnt like the front wheels rolling while the back ones are stationary.

Method 1
1) Start the car, turn traction control off.
2) Put the car in first gear and accelerate to 15mph.
3) Allow the car to run at 15mph for 20-30 seconds until the car chimes and the BRAKE and ABS lights on the dash illuminate.
4) Accelerate to 25-30mph and put the car in manual 2nd.
5) Accelerate to 3200 rpm and then floor it for the dyno.

Method 2
1) Disconnect the 2 front Wheel Speed Sensors
2) Start the car (traction control will already be disabled)
3) Put the car in first and accelerate to 25-30 mph and put the car in manual 2nd.
4) Accelerate to 3200 rpm and then floor it for the dyno.
will i have to do the same for my 97?
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Old 02-11-2006, 12:58 AM   #12
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you don't have stabilitrak system on your car so no.
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Old 02-11-2006, 01:33 AM   #13
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Man, it'* a good thing I read this, not that I intend to dyno my bonnie anytime soon, but there is a lot of good "need to know" things just in case. Good info guys.

Joe.
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Old 02-11-2006, 04:25 AM   #14
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Sorry I didn't pick that part up. Would the technique be same for 05 gxp? Holley says not to trigger nitrous till 2500 rpm then WOT (for a run not dyno). Will best dyno results come in 2nd gear @2500 WOT to redline? Or the 3200 rpm stated.
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Old 02-11-2006, 07:56 AM   #15
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Quote:
Originally Posted by gxp rules
Sorry I didn't pick that part up. Would the technique be same for 05 gxp? Holley says not to trigger nitrous till 2500 rpm then WOT (for a run not dyno). Will best dyno results come in 2nd gear @2500 WOT to redline? Or the 3200 rpm stated.
2500 will cause a downshift. With your steeper gears you may even have to go higher than 3200. You will just have to play with 2nd and see how low you can stomp on it without a downshift.
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Old 02-11-2006, 12:31 PM   #16
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Thanks for it reply Rogue and it will help alot. I'm going to have to take the car 90 miles (Syracuse) to get it on a Dyno and would like to be as informed as I can on the best way to go about it in this particular car and circumstance. First to get the best possible reading for the minumum price , and not feel to squirrely about injecting nitrous on the Dyno.(visualizing the car jumping into first with the happy trigger down And I will definitly take car out and become very familar with the downshift to first gear. I'm sure a nitrous shot leading into downshift would present a host of problems on the street or the Dyno....Have you thought of any marketable mods, and from a business standpoint, I can certanly understand that is going to be such a narrow market unless it carrys over into other N* models. But hey grampa Diz has his debit card ready......and waiting.
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Old 02-12-2006, 08:35 AM   #17
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Quote:
Originally Posted by gxp rules
Thanks for it reply Rogue and it will help alot. I'm going to have to take the car 90 miles (Syracuse) to get it on a Dyno and would like to be as informed as I can on the best way to go about it in this particular car and circumstance. First to get the best possible reading for the minumum price , and not feel to squirrely about injecting nitrous on the Dyno.(visualizing the car jumping into first with the happy trigger down And I will definitly take car out and become very familar with the downshift to first gear. I'm sure a nitrous shot leading into downshift would present a host of problems on the street or the Dyno....Have you thought of any marketable mods, and from a business standpoint, I can certanly understand that is going to be such a narrow market unless it carrys over into other N* models. But hey grampa Diz has his debit card ready......and waiting.
Just leave it in manual 2 and play around with the rpm range, you will find the sweet spot soon enough
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