LS engine to B.O.P. transmission ?
ok did some more searching and it looks like it wont unless i use an adapter plate, anyone ever used one of these on a ls engine or any other engine ? just trying not to buy another trans at this time and use what i have
I see no reason why it can't be done. See what's required to do a BOP to SBC (since SBC to LS is documented), then use that to determine what you need.
I think the LS4 has the BOP pattern for the FWD transmissions.
I think the LS4 has the BOP pattern for the FWD transmissions.
There are adapters for the Gen I SBC to BOP that should work. The LS4 has the 60° bell pattern and will not work unless you find a trans from a 60° engine, and they are all light-duty.
You mean one of these from Jegs or Summit? For $50 to $55, it seems like a reasonable budget solution.
On second look, Speedway Motors has them for $40.
On second look, Speedway Motors has them for $40.
Last edited by gofastwclass; Jan 11, 2013 at 06:39 PM.
Staging Lane
Joined: Sep 2012
Posts: 79
Likes: 0
From: Las Vegas
Try J.W Bellhousings. I used one of theirs and its awesome top quality machine work and very happy with my purchase. http://www.jegs.com/p/J-W-Performanc...48597/10002/-1
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Anybody try one of these adapter plates? Will it work on an LS? Reason I ask is b/c one of the above plates has welded nuts on the back of the plate - will that hit the LS block?
I'm running a bop th400 behind an aluminum 5.3 I used the jegs adapt-0-plate and if you do it right you end up with more bolts through the transmission than with a Chevy trans. The only issues I had was I had to grind a drilled and tapped boss cast into the rear of the block inside the trans pattern to allow room for the weld nut for one of the top two BOP bellhousing bolts
$40 doesn't get you anywhere towards the cost of a computer controlled OD trans for a carbed LS
$40 doesn't get you anywhere towards the cost of a computer controlled OD trans for a carbed LS
I'm running a bop th400 behind an aluminum 5.3 I used the jegs adapt-0-plate and if you do it right you end up with more bolts through the transmission than with a Chevy trans. The only issues I had was I had to grind a drilled and tapped boss cast into the rear of the block inside the trans pattern to allow room for the weld nut for one of the top two BOP bellhousing bolts
$40 doesn't get you anywhere towards the cost of a computer controlled OD trans for a carbed LS
$40 doesn't get you anywhere towards the cost of a computer controlled OD trans for a carbed LS
Are you happy with the way the plate worked out - like does the trans feel attached solidly?
When you say "do it right..." - you mean following the instructions right
Actually "do it right" or just right as I should have said involves welding an extension on the very top of of the adapter plate so you can use the topmost trans bolt hole in the block that is unused on a sbc trans.
It seems pretty solid. I'm still a few days away from first startup.
Actually "do it right" or just right as I should have said involves welding an extension on the very top of of the adapter plate so you can use the topmost trans bolt hole in the block that is unused on a sbc trans.
Actually "do it right" or just right as I should have said involves welding an extension on the very top of of the adapter plate so you can use the topmost trans bolt hole in the block that is unused on a sbc trans.
On The Tree
Joined: Sep 2009
Posts: 111
Likes: 2
Do any of you guys familiar with the BOP engines know if the bolt pattern on the crank shaft is the same as the SBC? Did the BOP engines change to the one piece rear seal in '86 like the SBC did with the change in the crank bolts too? I make adapters to use Chevy and Ford V8 engines with various Audi and Porsche transmissions and have a customer who wants to use a BOP engine and I am wondering if I can use the dimensions I have for the SBC to make the flywheel for this conversion. I have the information about the difference in the bellhousing bolt pattern so that is taken care of. Any information would be greatly appreciated.
Go over to classicoldsmobile.com or realoldspower.com. I'm sure you'll find the specs you need there.
Do any of you guys familiar with the BOP engines know if the bolt pattern on the crank shaft is the same as the SBC? Did the BOP engines change to the one piece rear seal in '86 like the SBC did with the change in the crank bolts too? I make adapters to use Chevy and Ford V8 engines with various Audi and Porsche transmissions and have a customer who wants to use a BOP engine and I am wondering if I can use the dimensions I have for the SBC to make the flywheel for this conversion. I have the information about the difference in the bellhousing bolt pattern so that is taken care of. Any information would be greatly appreciated.
