buickfreak
Member
- Joined
- Sep 11, 2002
Wich one is better to built , on-center or off- center . Wat's the difference and wich is more reliable.
Stage 2 on-center or off-center wich ?
- Thread starter buickfreak
- Start date
There's a lot of nattering on that thread..let me answer your questions briefly. 
The production blocks and early stage blocks are off-center. This means the rod journal isn't centered on the bore and the rod has an offset of about .110". You can see this looking at a stock rod.
When HP levels started going up and rods started breaking, the block casting was revised to move the bores and eliminate the offset. This allows the use of a stronger non-offset rod. The intakes were revised with slightly shifted ports and bolt holes since the heads are moved fore and aft. As production went along, the on-center casting received further improvements such as cross-bolted mains, BBC rear main seal, etc.
The off-centers are weaker but are still good for at least 800-1000 HP. The on-centers have made at least 1550 HP.
Lots of people like off-centers because you can use stock intakes with production style heads like the GN1s or the new TA heads. The on-center block requires a new intake such as the old BGC intake or a sheet metal intake. The off-center blocks and rods are getting scarce now but the new TA block will be available both ways.
The production blocks and early stage blocks are off-center. This means the rod journal isn't centered on the bore and the rod has an offset of about .110". You can see this looking at a stock rod.
When HP levels started going up and rods started breaking, the block casting was revised to move the bores and eliminate the offset. This allows the use of a stronger non-offset rod. The intakes were revised with slightly shifted ports and bolt holes since the heads are moved fore and aft. As production went along, the on-center casting received further improvements such as cross-bolted mains, BBC rear main seal, etc.
The off-centers are weaker but are still good for at least 800-1000 HP. The on-centers have made at least 1550 HP.
Lots of people like off-centers because you can use stock intakes with production style heads like the GN1s or the new TA heads. The on-center block requires a new intake such as the old BGC intake or a sheet metal intake. The off-center blocks and rods are getting scarce now but the new TA block will be available both ways.
strikeeagle
New Member
- Joined
- Jun 6, 2001
Kendall,
It's a pleasure to read something that cuts to the chase...
It's a pleasure to read something that cuts to the chase...
