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Ed's Auto Parts - Mention MOTORGEN for a Discount!
Motorgen Sponsor: McLeod Racing
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Old 10-07-2009, 03:40 PM   #31
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I was told that the STS-V stock show about 360-370hp on a dynojet. I have seen some videos on youtube that shows the same approximate numbers. I plan on getting the car tuned on a dyno in the future (~$600) to get a little more torque under the curve and quicker and firmer shifting. Sometimes the transmission won't shift quick enough in first to avoid hitting the rev limiter. I have noticed since the weather has been cooler lately the car feels much more powerful than when it was 100 outside. Later I want to try mixing a half a tank of 100 octane to see if there would be a difference.

Bob
Is that transmission problem a know issue? That seems like something GM should fix.....

Who are you going to have tune the car? I'm planning on putting together a dyno day in late November. Probably something like $40 for 3 pulls if that interests you.
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Old 10-07-2009, 04:04 PM   #32
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I found one!

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Old 10-07-2009, 04:12 PM   #33
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Is that transmission problem a know issue? That seems like something GM should fix.....

Who are you going to have tune the car? I'm planning on putting together a dyno day in late November. Probably something like $40 for 3 pulls if that interests you.
I would be interested to get a baseline. From what I have been told, tuning this engine and transmission is rather complex and will require multiple dyno runs like 6 or 8. I may know someone who would be interested in a dyno session too if numbers help lower cost.

Bob
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Old 10-07-2009, 04:19 PM   #34
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Is that transmission problem a know issue? That seems like something GM should fix.....
I checked and my car has all the latest firmware. The issue with the transmission is with the shifting algorithm which reduces torque between shift to reduce stress to the transmission and differential which leads to slower and softer shifts. I am still doing research on the tuning to confirm that I can have the transmission to behave differently when I change the stability control from normal, sport and competitive modes. Idealy I would leave the transmission alone in normal and remove the torque nannies in sport and competitive modes.

Bob
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Old 10-07-2009, 04:31 PM   #35
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Thing were much more simpler in the day when I tuned my small block chevy by ear. Put the lowest weight for dwell in the distributor to quicken the advance and advance the timing until it starts knocking then back off a bit. Of course in those days I was messing with the engine most every weekend tweeking it. It took Mom years to figure out that her Buick Riveria GS was so well taken care of by her sons because we were at OCIR every Wednesday night running the quarter mile.

Bob
LOL, what was it running back then?
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Old 10-07-2009, 08:55 PM   #36
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Here is a car with just tuning done and nothing else. Pretty impressive I think:

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Old 10-08-2009, 12:08 AM   #37
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LOL, what was it running back then?
14.7 @97. We always had traction problems. Heavy car, lots of torque, skinny tires makes for tire smoke. My brother baja'ed the Buick in the park were the power lines were in FV. We had to get the same brand of tires so Mom would not get curious.

Bob
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Old 10-08-2009, 07:41 PM   #38
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SHO + slight tuning and intake = 12.75@108

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Old 10-09-2009, 09:53 AM   #39
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SHO + slight tuning and intake = 12.75@108

YouTube - 2010 SHO
That was the most boring 12 seconds I've ever seen.
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Old 10-09-2009, 08:32 PM   #40
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That was the most boring 12 seconds I've ever seen.
Still impressive though
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