Pontiac 400 Tripod
Thread Starter
Supreme Member
Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Pontiac 400 Tripod
Anyone know anything about this engine? I just came across one from my new neighbor, he said he has no more use for it and he would sell it to me with everything including the carbs for 700 bucks. He said it has 10,000 miles on it cause he took it out of a boat. I think it sounds like a sweet deal but what are the specs on these things and would it work with my 700r4?
Banned
Joined: Oct 1999
Posts: 181
Likes: 0
From: Chicago, IL
Never heard of a tripod except to hold a camera in place.
You mean tri-power, aka 6 pack, aka 3 dueces. (3) 2 barrel carbs. if so that would make a cool project.
You would have to buy an adapter plate to mount the 400 Pontiac block to the 700R4's bolt pattern.
You may also have to adjust the driveshaft length to account for the adapter plate
All Pontiac V8s share the same external dimensions so the 350, 400, or 455 will fit in a 3rd gen. If I could do it over again I would have built a 455 Pontiac instead of a 350 Chevy. Well that will be the next incarnation in a few years. By then I'll be itching to change motors.
oh some specs:
Detail for Pontiac 400
Weight (lbs) 650
Bore 4.12 Stroke 3.75 Cylinders 8
Displacement (Cubic inches) 399.95 Displacement (Liters) 6.55
Rod Length 6.625
Rod/Stroke Ratio 1.77
Bore/Stroke Ratio 1.10
Rev Limits
5,600 RPM Stock short block with cast crank
6,240 RPM Forged crank and heavy duty engine fastners(ARP, Mildon, ect)
8,800 RPM Forged crank, rods, pistons, heavy duty engine fastners(ARP, Mildon, ect), and studs(head & main caps)
You mean tri-power, aka 6 pack, aka 3 dueces. (3) 2 barrel carbs. if so that would make a cool project.
You would have to buy an adapter plate to mount the 400 Pontiac block to the 700R4's bolt pattern.
You may also have to adjust the driveshaft length to account for the adapter plate
All Pontiac V8s share the same external dimensions so the 350, 400, or 455 will fit in a 3rd gen. If I could do it over again I would have built a 455 Pontiac instead of a 350 Chevy. Well that will be the next incarnation in a few years. By then I'll be itching to change motors.
oh some specs:
Detail for Pontiac 400
Weight (lbs) 650
Bore 4.12 Stroke 3.75 Cylinders 8
Displacement (Cubic inches) 399.95 Displacement (Liters) 6.55
Rod Length 6.625
Rod/Stroke Ratio 1.77
Bore/Stroke Ratio 1.10
Rev Limits
5,600 RPM Stock short block with cast crank
6,240 RPM Forged crank and heavy duty engine fastners(ARP, Mildon, ect)
8,800 RPM Forged crank, rods, pistons, heavy duty engine fastners(ARP, Mildon, ect), and studs(head & main caps)
Last edited by FRMULA; May 24, 2002 at 09:26 AM.
Thread
Thread Starter
Forum
Replies
Last Post
