rotating assembly differences
Addict
Rennlist Member
Rennlist Member
Joined: Jun 2003
Posts: 9,386
Likes: 72
From: Helsinki, Finland
Oil channel diameter was increased from 4mm to 5mm at '84 MY. At same time #3 main bearing sides were made taller. This also meant making crank slightly different in area where bearing sides are in contact with it.
Rennlist Member
Joined: Feb 2003
Posts: 29,828
Likes: 218
From: saratoga, ca
scot is running the older euro block, bored out, with the newer 84 style crank, which has the bigger rod bearing holes and using the stock older set of main bearings. rod bearings are all the same.
The rods can also be different, interchangeable, but slightly different weights, and thinner at the wrist pin end. we used a mix of them on scots engine, but balanced it all out to within a gram.
His motor is racing now and has been all season!
MK
The rods can also be different, interchangeable, but slightly different weights, and thinner at the wrist pin end. we used a mix of them on scots engine, but balanced it all out to within a gram.
His motor is racing now and has been all season!
MK
Rennlist Member
Joined: Feb 2003
Posts: 29,828
Likes: 218
From: saratoga, ca
yes, but the later cranks on the early blocks rub a tiny bit near the outside area of the main bearing. nothing a little dremmel cant fix to give it a .030 clearance.
the weights of the rods are rigth around 850gram, if i remember correctly.
if you mix and match parts, just have the entire assembly balanced. not a big deal, and match all the rods to the same weights and tip and tail balance them too.
mk
the weights of the rods are rigth around 850gram, if i remember correctly.
if you mix and match parts, just have the entire assembly balanced. not a big deal, and match all the rods to the same weights and tip and tail balance them too.
mk
