The Chronicles of OSG - Page 8 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-16-2005, 11:09 PM   #71
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Already done. Plus I did the pistons at TDC, so the likelihood of crap getting in there is very unlikely.


-justin
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Old 07-17-2005, 04:51 PM   #72
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Actually, I'd say it'* very unlikely that something didn't get in there. Even at TDC, there'* a gap there between the piston and cylinder (that'* why engines have rings, in case you didn't know...), and gaps collect stuff. Like abrasive bits of carbon.
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Old 07-17-2005, 05:11 PM   #73
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Quote:
Originally Posted by opensourceguy
Umm.. drafting is no myth. Fuel economy increase may be a myth, but the theory is there.


-justin
I wasn't saying that drafting was a myth, they do it in NASCAR.

Problem with a small car trying to draft a semi is that you have to be REALLY close to him to have any real effect. And the speeds that are necessary to make drafting truely effective, your car won't won't reach those speeds.
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Old 07-18-2005, 08:54 AM   #74
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Sorry I have to weigh in, if you can get behind a semi that is really moving with a 53 ft trailer, you can leave about 3 car lengths and still get the drafting effects. I followed on semi for about 250 miles doing 80 mph and got about 32 mpg and never got pulled over

Anyone that remembers knows that I had mpg problems with my car, so 32 is AMAZING, I usually get about 28 on the same trip.
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Old 07-18-2005, 09:12 AM   #75
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Quote:
Originally Posted by Scrangler83
Sorry I have to weigh in, if you can get behind a semi that is really moving with a 53 ft trailer, you can leave about 3 car lengths and still get the drafting effects. I followed on semi for about 250 miles doing 80 mph and got about 32 mpg and never got pulled over

Anyone that remembers knows that I had mpg problems with my car, so 32 is AMAZING, I usually get about 28 on the same trip.
Yah....but I get 32 at about the same speed with out drafting on the freeway. Thing is you have to have 2 equally aerodynamic vehicles for it to really pay off. And quite a bit of speed.
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Old 07-18-2005, 09:13 AM   #76
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Quote:
Originally Posted by LakevilleSSEi
Quote:
Originally Posted by Scrangler83
Sorry I have to weigh in, if you can get behind a semi that is really moving with a 53 ft trailer, you can leave about 3 car lengths and still get the drafting effects. I followed on semi for about 250 miles doing 80 mph and got about 32 mpg and never got pulled over

Anyone that remembers knows that I had mpg problems with my car, so 32 is AMAZING, I usually get about 28 on the same trip.
Yah....but I get 32 at about the same speed with out drafting on the freeway. Thing is you have to have 2 equally aerodynamic vehicles for it to really pay off. And quite a bit of speed.
About the same here

Lets think about this... Maybe its not so much drafting as it is being in a dead spot of air, least amount or resistance maybe.... With the trailer of the Big Rig almost square, would the air in motion go straight, or would it be in a diffrent motion?

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Old 07-18-2005, 09:15 AM   #77
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Also 2-3 car lentghts behind a semi trailer, the where it'* extremely turbulant.
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Old 07-18-2005, 09:17 AM   #78
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Quote:
Originally Posted by LakevilleSSEi
Also 2-3 car lentghts behind a semi trailer, the where it'* extremely turbulant.
Yeah, thats why I don't like to follow too close, and I usually go around... But even then the forces will move you around a bit... Good thing the Bonnie is a big car and seems to sit well on the road...

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Old 07-18-2005, 09:38 AM   #79
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Once I got closer than 2-3 car lengths in an old truck of mine. If you are too close like that there is a sweet spot w/o being buffeted. As well I got sucked in toward the rig and was nearly off the pedal completely.

Don't do this!!! It is extremely dangerous and absolutely not suggested. (I did survive fine though)
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Old 07-28-2005, 11:11 PM   #80
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car is put back together.. but the starter solenoid died, causing it to take out the battery. So i'm working on getting the battery working again, but i can't afford a new starter. So hopefully i'll be able to figure something out to fix it.. for free of co urse. For now, i'm just glad ol' pearl is back together. this time it'* not half assed like last time, all she needs is a good starter, and we'll be back in business .

I'll keep you guys posted.
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