Re: L67 3800 II RWD retrofit?
This is on another post also, but the F bodies from 1996-2002 used the series 2 3800 with a 4le60 trans. I am going to mock up this combo in a 1970 Skylark convertible body this winter. I picked up a rolled over Regal GS with the supercharged motor and a 1998 Firebird with the 3800. The plan is to get it running with the Non-Supercharged series 2 then switch over if the orientation proves to be a solvable concern.
My theory is not performance minded in the least. My neighbor's 2000 Lesabre gets 28 mpg and the series 1 in the 92 Regal gets 26 mpg regularly.
The weight of the 2000 Lesabre is about 3600lbs. I will find a way to get a non-AC 70 Skylark ragtop to that weight. I have averaged several sources to come to a figure of 18% loss of HP for a RWD trans vs 14% loss for a FWD transaxle so I would have to find a way to either reduce weight further or boost power to make up for that 4% difference, but still guess that the combo should be good for 25+ mpg. The weight of the engine itself is less than the 350 2 bbl. but the Trans weighs 20 pounds more? The old combo was good for 16mpg pretty regularly.
I want a modern fuel injection drivetrain in a classic skylark ragtop that gets 25+ mpg. I am used to driving a V-6 now and like the power and mileage of the 3800. And they are cheap and all over. I looked at an LS derivitave V-8 swap but its too spendy and will be around a 20 mpg vehicle. I have a grand total of $600 in both donor 3800 vehicles of which I will be able to sell off a bunch of parts along the way to make some of my dough back.
I will have pics up this winter as I get this up and rolling.
Chris "too many projects" Paape
1971 GS Stage 1 convertible(in resto, 3rd time)
1970 GS Stage 1 convertible(Rough)
1969 GS 400 4speed Convertible(Rougher)
1970 Sportwagon(beat up parts hauler)
1971 GS 350 Coupe(my summer driver)
2009 Ford Focus
1993 Cavalier Z24 Convertible
1996 Pontiac Bonneville
1999 Chevy Tahoe