Nur mal so zur InfoSimilarities: Other GM Engines
A Olds 350 is not a Buick 350 is not a Pontiac 350 is not a Chevy 350, is not a Cadillac 350, small and big block! This applies to Olds small block and big block engines. The only things in common with other GM division engines are the distributor cap, rotor, carb bolt pattern, and the transmission bolt pattern. Buick, Cadillac, Olds and Pontiac are the same, with five bolts. Chevy is different, with four bolts.
Chevy's are bigger and heavier than comparable CID Olds engines since they used very little nickel in the cast iron. Nickel is a expensive strengthening agent for cast iron. Low quality iron requires mass in order to make it stronger, which is why you will see the physical weight and size difference.
I hope you don't think that 4 bolt mains were put in Chevy engines so that they would be "Ultra-Strong" for the performance enthusiast. This is simply not true, they are there because the iron requires strength to keep the cap in place and 2 bolts in mush is not as good as 4 bolts in mush.
Oldsmobile blocks aren't made of mush, rather, they are made of high quality cast iron with plenty of nickel to make it strong. Olds big block engines were cast with extremely high nickel content until mid 1970. You can easily spot the difference in the shape of the "F" near the oil sending unit. Look at any 1968 1969 and early 1970 block and the F will be different in shape than any late 1970 to 1974 block. In 1975 the nickel content was lowered even more. Some of these later engines will have a mounting hole for a clutch swivel rod ball, some will not. This can always be machined.
As the weight of the engines go (stock engine weights): Model Size Weight(lbs) Notes
Buick 455 600-640 (the later may be with accessories)
Cadillac 500 750
Chevy 350 535
Chevy 454 685 Olds 350 560
Olds 425 660 (flywheel, exhaust manifolds, cross over pipe, starter, water pump, alternater, carb, 5 quarts oil, distributer, etc.)
Olds 455 620
Pontiac 389 650 (a 455 should be the same weight)
And internal comparisons on bore, stoke and bearing sizes: Maker Size Bore Stroke Mains Rods
Olds 455 4.126" 4.25" 3.00" 2.50"
Pontiac 455 4.152" 4.21" 3.00" 2.25"
Buick 455 4.312" 3.90" 3.25" 2.25"
Olds 350 4.057" 3.385" 2.50" 2.125"
Pontiac 350 3.876" 3.75" 3.00" 2.25"
Buick 350 3.80" 3.85" 3.00" 2.00"
Olds 400E 4.00" 3.975" 3.00" 2.50"
Olds 400L 3.87" 4.25" 3.00" 2.50"
Olds 403 4.351" 3.385" 2.50" 2.125"
Pontiac 400 4.121" 3.75" 3.00" 2.25"
Buick 400
3.25" 2.25"
The Chevy 307 from the late 60s to early 70s is a real small block Chevy engine and not to be confused with the 307 Olds from the 80s, which is a real Oldsmobile engine and common to other small block Olds motors (260-307-330-350-403). The two are totally different in bore, stroke, bore spacing, block casting, head casting, etc. Nothing is interchangeable. Pontiac had a 301 engine in the late 70s-early 80s, which is a Pontiac engine, and somewhat common to other Pontiac engines (326-350-389-400-428).
The Buick, Olds and Pontiac 455s are two completely different designs with no interchangeable parts (everything but the carb and the distributor cap). The Buick 455 was a 1970 introduction, developed from the all-new Buick 430ci V-8 introduced in 1967 to replace the former "nailhead" 401/425 Buick V-8's that dated back to the fifties. The Pontiac was introduced in the same year, 1970, to replace the 428. That engine design, however, dates back to the original Pontiac V-8 introduced in 1954.
GM confuses people by first having each division build totally different engines with the same displacement (at least, after rounding off), such as the four different 350s, in the 60s, then mixing engines and divisions (such as the 305 Chevy used in Oldsmobiles, or the 403 Olds used in Buicks) when they started to pare down this overlap in the mid-70s.
Quelle:
http://www.442.com/oldsfaq/ofeng.htm#ENG 1964 - 1990 Similarities Other GM Engines
Thema: Kompatibilität bei GM Motoren (Gelesen 2079 mal)