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How to dyno tune an SS?

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Old 01-03-2004 | 08:27 AM
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Good analogy Kurt
Old 01-03-2004 | 10:40 AM
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Originally Posted by 427
Todd,
Depends how "Reckless" you really are. We have blown up a viscous coupling box with shaft out. GM owned the truck and they wanted to try it(with design guys yelling NOOOOOOOOOOO)
Torque management in computer will go crazy if front wheels don't spin.
Local guy here went over Niagra falls with no protection and lived.... but I would not try it. LOL
Kurt
Humm,,, TQ mgmt or Traction Control ? Which the SS doesn't have. I'm wondering what would cause the computer to go crazy? on a SS. I'm with BigTex I don't think it will "blow up" the heat could cause premature failure but I don't see how any parts are going to go flying
As to your issues with a H2
4-wheel Drive
H2's standard powertrain-integrated, two-speed, full-time 4-wheel drive system is highly advanced and extremely capable, with an electronically controlled transfer case providing five different operational modes it creates optimal performance under any driving condition

Not the same as the AWD SS transfer case

As for your Niagra story,

This is a weird but true story . . . A complaint was received by the Pontiac Division of General Motors:

This is the second time I have written you, and I don't blame you for not answering me, because I kind of sounded crazy, but it is a fact that we have a tradition in our family of ice cream for dessert after dinner each night. But the kind of ice cream varies so, every night, after we've eaten, the whole family votes on which kind of ice cream we should have and I drive down to the store to get it.

It's also a fact that I recently purchased a new Pontiac and since then my trips to the store have created a problem. You see, every time I buy vanilla ice cream, when I start back from the store my car won't start. If I get any other kind of ice cream, the car starts just fine.

I want you to know I'm serious about this question, no matter how silly it sounds: 'What is there about a Pontiac that makes it not start when I get vanilla ice cream, and easy to start whenever I get any other kind?'"

The Pontiac President was understandably skeptical about the letter, but sent an engineer to check it out anyway. The latter was surprised to be greeted by a successful, obviously well educated man in a fine neighborhood. He had arranged to meet the man just after dinner time, so the two hopped into the car and drove to the ice cream store. It was vanilla ice cream that night and, sure enough, after they came back to the car, it wouldn't start.

The engineer returned for three more nights. The first night, the man got chocolate. The car started. The second night, he got strawberry. The car started. The third night he ordered vanilla. The car failed to start.

Now the engineer, being a logical man, refused to believe that this man's car was allergic to vanilla ice cream. He arranged, therefore, to continue his visits for as long as it took to solve the problem. And toward this end he began to take notes: he jotted down all sorts of data, time of day, type of gas used, time to drive back and forth, etc. In a short time, he had a clue: The man took less time to buy vanilla than any other flavor. Why? The answer was in the layout of the store.

Vanilla, being the most popular flavor, was in a separate case at the front of the store for quick pickup. All the other flavors were kept in the back of the store at a different counter where it took considerably longer to find the flavor and get checked out. Now the question for the engineer was why the car wouldn't start when it took less time.

Once time became the problem — not the vanilla ice cream — the engineer quickly came up with the answer: vapor lock. It was happening every night, but the extra time taken to get the other flavors allowed the engine to cool down sufficiently to start. When the man got vanilla, the engine was still too hot for the vapor lock to dissipate.

Moral of the story: Sometimes when you don't know what your talking about other people do.
Old 01-03-2004 | 10:48 AM
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You know Dennis? Sometimes you amaze me with the stuff you come up with.
Old 01-03-2004 | 11:02 AM
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whoa... what the hell?... good story.
Old 01-03-2004 | 12:08 PM
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I would like to completely remove the awd from my SS. How hard would it be to do? Mechanically? Electronics or programming? Anyone else thought about this?
Old 01-03-2004 | 04:57 PM
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Ripped427
that movie clip is ******* funny~!!!!!!!!
Old 01-03-2004 | 10:07 PM
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Originally Posted by 67SS509
I would like to completely remove the awd from my SS. How hard would it be to do? Mechanically? Electronics or programming? Anyone else thought about this?
You could fairly easily remove the transfer case and move to a 2wd tail housing and driveshaft. You are going to have many more problems swapping out the front end and removing the front differential. I guess you could leave hte front end alone, but you really wouldn't drop much weight with only losing the AWD Tcase. Programming could turn off the AWD sensors.

I don't think its worth doing.
Old 01-04-2004 | 08:09 AM
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I was thinking removing the front diff. mechanically would be the easiest part, just remove everthing up to the wheels and just let them stay on the original spindle. One of the reasons I want it removed is because of the gear whine in the front diff. and the groaning noise during slow speed braking and turning. GM seems to have deaf ears on this problem even with all the people that have complained. Besides, in stock form the awd is not needed....I believe those big ol goodyears in the back can handle 345 horses with 5400 lbs. planting them.
Old 01-04-2004 | 10:03 AM
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I believe those big ol goodyears in the back can handle 345 horses with 5400 lbs. planting them.
Sure......if that's all you plan to put to them. If I can get 4-wheel spin, I'd really be sucking in 2wd.
Old 01-04-2004 | 05:23 PM
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Originally Posted by BigTex
Todd - The truck was dyno tuned with LS1 Edit. I'm pretty sure they used a Tech2 and a wideband to tune.

I posted that info on Silv SS saying GM says you shouldn't drive it with one driveshaft. The AWD transfer case has a viscous coupling that allow a little slip (so you won't have issues turning corners) but will engage under major slip. When a wheel slips, the fluid heats up, putting more pressure on the friction plates of the driveshaft with most traction. The fluids in the transfer case cannot be replaced, so if you burn them up, you have to replace the transfer case.

That being said, I will risk a couple of 10 second dyno pulls in my SS pretty soon.
let us know!!! I'd definatley allow extra cooling time for the transfer case between runs


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