Last post on Apr 26, 2001 at 3:45 PM
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Coupe, Convertible, Sedan
#205 of 214 Buick 3.8 ....andre1969
Apr 21, 2001 (10:18 pm)
The original engine had three standard crankpins so the firing intervals, in degrees of crankshaft rotation, were 90-150-90-150-90-150 etc. Both versions had 90 degree angle between the cylinder banks. In '75 (or possibly '76) GM introduced the "even-firing" feature which is still used. That feature has each crankpin "split" so that the two rods are separated by 30 degrees of crank angle - resulting in a uniform 120 degrees of crank rotation for each firing interval.
I don't know details of how the crankshaft counterweights may have been changed from year to year but the auxiliary balance shaft wasn't introduced until 1988. This shaft is located in the "V" of the engine, just above the camshaft. I suppose that's the "external balancing' that you mention. Thus, I feel certain the "even-firing" and "balance-shaft" features were incorporated into this engine rather than their being two different types.
Apr 22, 2001 (10:18 am)
What was the first GM production car to use electronic fuel injection and an ohc engine with 4 valves per cylinder?
(those of you who talked to me about this in another topic are DISQUALIFIED! so there....)
Apr 22, 2001 (11:40 am)
Wasn't that the Quad 4, came out in 1989 or so? I drove a new '91 Pontiac Grand Am coupe with the HO engine and 5 speed and it was impressively quick, although I think some of that impression came from all that induction noise and engine vibration, and a front-drive chassis that couldn't handle the power. But it was fun.
Should have bought it but went with a '90 Cutlass International Series (there's a trivia question) with the same combo but much heavier. The result was that always popular combination of no torque and no top end--sounds like my Corvair turbo--rough as a cob and row it around with a rubbery shifter. That's when I found out if a car's been sitting on the lot for a year there's a good reason. But a handsome car and my first new one.
Apr 22, 2001 (1:13 pm)
Good guess......but wrong! You are too late.....this car was earlier by some years.
Hint: It is a model no longer manufactured...that is, like "Citation" or "Bronco".
Apr 22, 2001 (8:06 pm)
Okay I know now, like you said you were just talking about the car in another thread--thought you meant over in Coupes, but now it clicks. Pretty amazing that they got so little out of so much hardware, but like I've said before, trust that car maker to build an underachiever.
#211 of 214 First mid-priced car to break 100 MPH
Apr 26, 2001 (3:21 pm)
What was the first moderately priced American Automobile to break 100 MPH. By moderately priced, I mean no Cadillacs, Lincolns, La Salles, Packards, Pierces, or Dusenbergs.
Apr 26, 2001 (3:23 pm)
The name hints at its potential...it's still in use.
Apr 26, 2001 (3:25 pm)
Would it be the 1936 Buick Century?
Apr 26, 2001 (3:45 pm)
Okay, the first GM dohc fuel injected engine was the Cogsworth Vega, 1976.