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Old 11-11-2008, 09:24 PM
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Supercharged 3800 swap

I'm thinking of using a sc3800/t5 in the roadster pickup I'm building. Can a FWD supercharged 3800 be used in a rwd application,and if not will a F-body 3800 accept the supercharger? What would be better a mega squirt controller or a factory ecu?
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Shane

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Old 11-12-2008, 06:13 AM
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Megasquirt would be better since its a lot easier to tune, you can run a RWD block with the FWD top end to have a boosted RWD 3800, if you look on some camaro forums the guys ahve done just that. Keep in mind you just want the RWD block since the FWD crank, pistons, and rods are all built a little heavier in the boosted applications.

This is a semi-common hotrodded engine and there are PLENTY of parts out there if you look. You won't get the hp per dollar that you would on a typical chevy 350, BUT it would be very different and neat to see at a car show.
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Old 11-12-2008, 07:53 PM
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Is there some reason that the fwd block will not work?
Shane
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Old 11-13-2008, 07:33 AM
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The FWD one will work you'll have to use a adaptor plate to mate up with the RWD trans.
Some good sites:
www.fullthrottlev6.com
3800pro.com

I'm 90% sure that would be the only issue. (depeding on your engine bay room that is)
I've turbo charged the RWD F-body 3800's and they hold up very well.
You can use HPTuners to edit the factory ECM for boost. There's no real need to have Megasquirt. I'd pick up a GTP engine from Morad 3800 Parts

I get used GTP manifolds so I can build my forward facing Headers for turbo.
They have complete engines/wire harness ect.. everything you'd need at great prices.
Hope that helps,
Scott~
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Old 11-13-2008, 08:14 AM
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Quote:
Originally Posted by UR50SLO
The FWD one will work you'll have to use a adaptor plate to mate up with the RWD trans.
Some good sites:
www.fullthrottlev6.com
3800pro.com

I'm 90% sure that would be the only issue. (depeding on your engine bay room that is)
I've turbo charged the RWD F-body 3800's and they hold up very well.
You can use HPTuners to edit the factory ECM for boost. There's no real need to have Megasquirt. I'd pick up a GTP engine from Morad 3800 Parts

I get used GTP manifolds so I can build my forward facing Headers for turbo.
They have complete engines/wire harness ect.. everything you'd need at great prices.
Hope that helps,
Scott~
I only recomedn MS because its very user friendly, easy to find help on, and if he ever decide to change hie engine later it will work on almost anything.
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Old 11-13-2008, 09:23 AM
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with the right adapter plate/bellhousing you can run a FWD motor in a RWD application. I have heard of several people using QUAD4 motors in RWD applications...
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Old 11-13-2008, 09:26 AM
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Quote:
Originally Posted by GUNTHER19820
with the right adapter plate/bellhousing you can run a FWD motor in a RWD application. I have heard of several people using QUAD4 motors in RWD applications...
Yea, that was done for awhile before the Ecotech came out. htose adapters/bellhousings were pricey! I was thinking of di\oing a Quad 4 in an old project I had, but the cost of the bellhousing made me decide to go a different route.
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Old 11-13-2008, 09:32 AM
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one of my buddies wanted to drop one in an s-10, but it was the same thing-when he priced the bellhousing he changed his mind
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Old 11-13-2008, 10:29 AM
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Quote:
Originally Posted by UR50SLO
The FWD one will work you'll have to use a adaptor plate to mate up with the RWD trans.
The FWD 3800 block uses the same narrow bellhousing bolt pattern as the 2.8 liter V6. The 2.8 was used in RWD applications in the S-10 and the F-body cars. you can get RWD 700R4 cases from these cars that will bolt to the FWD 3800 block. No adapter plate is required.
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Old 11-13-2008, 10:34 AM
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The 2.8 had two different bolt patterns. I believe the 3800 did too.
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Old 11-13-2008, 10:44 AM
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Quote:
Originally Posted by ap72
The 2.8 had two different bolt patterns. I believe the 3800 did too.
The 3800 came in the RWD and narrow FWD bellhousing bolt patterns. The FWD 3800 uses the same bellhousing as the FWD 2.8. Here's a 700R4 with the narrow 2.8 V6 bellhousing:

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Old 11-13-2008, 11:08 AM
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Yea, we all agree on that, its the "60" bolt pattern. Which is shared by some 3.8L's and some 2.8/3.1/3.4's. The FWD supercharged 3800 never came in a RWD application, and never carried the 60 bolt pattern.

So you coud swap the 3800S block out for a RWD 3.8L and move everythign over to that, or you could run an adapter. Most people do not want to buy two engines and piece them together (though it is done) and would prefer running the adapter.
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Old 11-13-2008, 11:58 AM
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Quote:
Originally Posted by ap72
Yea, we all agree on that, its the "60" bolt pattern. Which is shared by some 3.8L's and some 2.8/3.1/3.4's. The FWD supercharged 3800 never came in a RWD application, and never carried the 60 bolt pattern.
I beg to differ. The 3800SC uses the same GM FWD narrow bolt pattern as all other FWD 3800 motors and the 2.8 V6. This same FWD bolt pattern was used on the 2.8 in RWD applications on the S-10 and the F-body. The FWD Northstar uses a very similar bolt pattern with only one hole different. Cadillac Hot Rod Fabricators uses the S-10/F-body trans I mentioned above and moves one hole to adapt to the Northstar.

To get this back on topic, the 3800SC swap into RWD cars has been done. The 700R4/4L60 trans bolts up. The biggest problem is that the throttle body sits over the bellhousing and requires a large hole be cut in the firewall. There is a G-body floating around the internet with exactly this swap.
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Old 11-13-2008, 01:26 PM
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Nice information Joe... I'll logg that one away for future use for sure!
~Scott
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Old 11-13-2008, 08:18 PM
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Would the 2.8 t5 live behind the sc3800 in a 1500lb hotrod? Would I be better to get a 2.8 bell housing and a 4.3 t5 transmission? Motor would be left mostly stock,may get the higher boost sc pulley.
Shane
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