| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#21
10-30-2018, 12:16 PM
|
||||
|
||||
I know this isn't an accurate measurement, but this is what I did to get a guesstimate of the stroke on my crank. I get approximately 4 3/4" !!! Anyone?
The bore on the '62 11B 389 block is 4.12, standard 400 piston size. With this combo, that would make this a 506" engine! |
|
#22
10-30-2018, 12:27 PM
|
||||
|
||||
|
Yup, 506.6 cid if in deed that's 4.750.
I got to say that I can't see how that stroke Crank would fit in a factory block beacuse you would have to notch it into the water jacket it would seem to clear the Rods. I think that Crank was ment to be used in a MT Aluminum hemi block, once again if it is 4.750".
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 10-30-2018 at 12:38 PM. |
|
#23
10-30-2018, 12:45 PM
|
||||
|
||||
|
After checking the block a little closer, it has been clearanced on both the water jacket side and the cam tunnel side for the M/T rods. Good catch!
|
|
#24
10-30-2018, 12:47 PM
|
|||
|
|||
|
The aluminum rods you pictured have a little unusual shape to the big ends. Actually, a little narrow and the cap screws are recessed some. This could all be for clearance. Look the block over and see if it has major relief work done for stroke.
|
|
#25
10-30-2018, 02:46 PM
|
|||
|
|||
|
I see the pilot bearing inside the crank, so it was a manual trans unit.
Why couldn't this crank be shot-peened, then polished up good as new, or ground slightly to the next main/rod size?
__________________
John IG: @crawdaddycustoms YouTube: https://www.youtube.com/channel/UCK9...Nc_lk1Q/videos |
|
#26
10-30-2018, 07:09 PM
|
||||
|
||||
|
Quote:
|
|
#27
10-30-2018, 07:28 PM
|
|||
|
|||
|
We never broke one but remember that was in the 60s.HP and tires has changed.We broke transmissions and rear ends back then.For a street Low RPM build cast cranks have never bothered me.Tom
|
|
#28
10-30-2018, 08:14 PM
|
||||
|
||||
|
Quote:
__________________
My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
|
#29
10-30-2018, 08:27 PM
|
||||
|
||||
|
Bill, the rod throws are 180 degrees from each other so....
|
|
#30
10-30-2018, 09:47 PM
|
||||
|
||||
|
Shows you how dumb I am
__________________
My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
|
#31
10-30-2018, 09:58 PM
|
|||
|
|||
|
Hmmmm, have a really strong feeling I examined these parts around '93-94.
Couldn't have been two sets of heavily hogged out 127's, and a pair of disassembled original AFB's & oddball crank in central TX. Ck your PM box Poncho.
__________________
Buzzards gotta eat... same as worms. |
|
#32
10-30-2018, 10:09 PM
|
||||
|
||||
|
Quote:
|
|
#33
10-31-2018, 06:57 AM
|
||||
|
||||
|
Quote:
|
|
#34
10-31-2018, 06:13 PM
|
|||
|
|||
|
There is no numbers in the catalog.They show 4.125,4.250,4.375,4.500 and 4.625 stroke cranks.They are called cast BILLET cranks,made from ductile iron with tensile strength of 110,000 PSI in ALL directions.DONT shoot the messenger!Tom
|
|
#35
11-02-2018, 12:56 PM
|
||||
|
||||
|
Thanks, Tom!
|
|
#36
11-02-2018, 01:30 PM
|
||||
|
||||
|
The flange on the back of the crank has a counterweight on it, so I say someone did that in an attempt to neutral balance it. The 3072-2 number is probably just a job number stamped in by the shop that balanced it so they could keep track of it.
Also, those rods were obviously made in 2014 so no antique jewel there!   Those pistons were sure funny looking back in the day. My guess is they are Arias pistons.
__________________
Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
|
#37
11-03-2018, 06:05 PM
|
||||
|
||||
|
Quote:
|
|
#38
11-03-2018, 06:08 PM
|
|||
|
|||
|
From the pic in the catalog they are not M/T rods.Tom
|
|
#39
11-03-2018, 06:32 PM
|
||||
|
||||
|
Quote:
|
|
#40
11-03-2018, 06:44 PM
|
|||
|
|||
|
Cool,they are diff than the catalog!Are the pistons also marked with a M/T?The pics of the pontiac pistons dont have that long of skirt in the catalog?Tom
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
