turbokinetic
Member
- Joined
- Jan 29, 2008
- Messages
- 256
Hey all! There are a lot of incredible cars represented here. I have been doing some serious reading lately!!
I have an ongoing project that has me looking for some info on the 3.8 vs. 3.0liter engine blocks. I asked, indirectly before and no one came forward, so here is more background info.
I have installed the turbo, intake, and associated plumbing from a 1979 Riviera (3.8 BOP bellhousing) to a FWD 3.0 engine. The system has also been converted to EFI and it drives and runs well.
The engine has 40,000 original miles from 1984 and has been sitting a long time. Due to sludge in the pan I messed up a rod bearing, fixed that then less than 50 miles later, wiped a cam lobe. So now I am rebuilding it.
Engine has not seen over 4000 RPM and not more than 7 PSI boost.
I have the rest of the 3.8 turbo engine (including the steel crank) and I would like to install that crank in my block.
According to the info I have, the 3.0 and 3.8 share the same bore; the stroke length is the difference.
I have done a 2.8 to 3.1 crank swap on another engine and it involved only the crank and pistons (wrist pin height).
Can anyone confirm or deny the possibility of this being possible? There is lots of room in the crankcase for a longer stroke crankshaft.
I would rather use the 3.8 block but there are 2 problems. It has a RWD bellhousing and would not fit my transmission; and that engine has massive freeze-cracking issues.
If the 3.8 crank will not fit in my 3.0 block, I will get a core FWD 3.8 and build it up. I would like to use this block because it is such low mileage you can still see the cross-hatch in the cylinder walls, and there is no detectable wear-ridge. It is like-new.
Thanks in advance for any insight. I searched and couldn't find an answer. If no one knows, I'll try that 3.8 crank and see how far the pistons protrude. Then if I can find pistons with the same amount greater of wrist-pin height, it should work. I have a hunch the standard 3.8 pistons will work. Whatever the outcome I'll let the group know what happens!
The car can be seen here on this thread:
http://www.turbobuick.com/forums/hybrids/240088-turbo-buick-3-0-fwd.html
David
I have an ongoing project that has me looking for some info on the 3.8 vs. 3.0liter engine blocks. I asked, indirectly before and no one came forward, so here is more background info.
I have installed the turbo, intake, and associated plumbing from a 1979 Riviera (3.8 BOP bellhousing) to a FWD 3.0 engine. The system has also been converted to EFI and it drives and runs well.
The engine has 40,000 original miles from 1984 and has been sitting a long time. Due to sludge in the pan I messed up a rod bearing, fixed that then less than 50 miles later, wiped a cam lobe. So now I am rebuilding it.
Engine has not seen over 4000 RPM and not more than 7 PSI boost.
I have the rest of the 3.8 turbo engine (including the steel crank) and I would like to install that crank in my block.
According to the info I have, the 3.0 and 3.8 share the same bore; the stroke length is the difference.
I have done a 2.8 to 3.1 crank swap on another engine and it involved only the crank and pistons (wrist pin height).
Can anyone confirm or deny the possibility of this being possible? There is lots of room in the crankcase for a longer stroke crankshaft.
I would rather use the 3.8 block but there are 2 problems. It has a RWD bellhousing and would not fit my transmission; and that engine has massive freeze-cracking issues.
If the 3.8 crank will not fit in my 3.0 block, I will get a core FWD 3.8 and build it up. I would like to use this block because it is such low mileage you can still see the cross-hatch in the cylinder walls, and there is no detectable wear-ridge. It is like-new.
Thanks in advance for any insight. I searched and couldn't find an answer. If no one knows, I'll try that 3.8 crank and see how far the pistons protrude. Then if I can find pistons with the same amount greater of wrist-pin height, it should work. I have a hunch the standard 3.8 pistons will work. Whatever the outcome I'll let the group know what happens!
The car can be seen here on this thread:
http://www.turbobuick.com/forums/hybrids/240088-turbo-buick-3-0-fwd.html
David
