a couple of years ago I responded to an add for a Stroker Kit. Crank, balancer, flywheel, trans adapter, bearings, connecting rods, Mickey Thompson Pistons. All balanced and sold together in 1962... Supposed to be 1/2" stroke, .030 over. Some serious weight has been added to the crank and rods. Comparining by a Ross 425 piston:
[TABLE="width: 651"] <tbody>[TR] [TD="class: xl23, width: 72"] Stroker:[/TD] [TD="width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="class: xl24, width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="width: 64, align: right"][/TD] [TD="class: xl22, width: 67, align: right"][/TD] [/TR] </tbody>[/TABLE] Bore:4.3125 plus +0.030 = 4.3425 Stroke: 3.64 + .5 = 4.14 =490.5 cubic inches! I would like to take it to Mike @ AMP to assemble the block. I'll have to have some heads ported. The crank is set up for a dyna flow and I need to figure out how to make the flywheel work - or if I can use my Aluminum flywheel, which fits the crank but has some issues regarding balance. The pistons are the coolest piece. I hope to use those no matter what! Ted
There is an adapter made Ted to convert the DynaFlow crank to accept a TH400 flexplate or standard flywheel. Tom T.
That's some cool stuff! But I'd rather get those rods shot peened, there's never too much fatigue strength, especially with heavily loaded lightweight parts.
I ran that identical set up in my boat for 14 years until one of those Mickey Thompson pistons died this July. Mine had a weighted stock balancer and a weighted stick flywheel. With the added swept volume compression woks out o 11.75:1. You have to do heavy clearencing to the stock oil galley to get it to fit. Ill look I think I have some pictures of it still. It's neat stuff but even with a big cam .560 lift 254 duration @.050 and 2 750 AFB's on a B262 mine wanted to nose over about 4800rpm.
Nice! I have 2 spare Mickey Thompson pistons if you are interested. If you find the block I am very interested in the oil galley modifications. Good to hear of one that ran! - Ted
Hi 487, do you think it was nosing over because of needing more air ? I understand that nailheads will never have enough air. Would of been nice to see what Max B. heads flowed, get a idea what was going on with the combo. I was wondering what springs max was using? Ted, This will be a interesting thread to follow:TU:
The mods look like this. Be careful with the center oil galley. When you get it so the rods clear it is only about .040 thick. I wouldn't be scared of it though, The old block in my boat ran for 33 years that way. You will also need to hack a pretty good chunk off your oil pump. Im positive that engine started to nose over due to lack of air. Within the constraints of a nail head cylinder head I dont think adding displacement is the answer. Hence the reason the foundation for my blown engine is a 364. Until the advent of good aftermarket heads the small block Chevy to race was a 302. There is no magic in the short stroke; the displacement was a good match for available cylinder head flow. I still have the heads. I was going to valve job them and sell them on EBay, just got too busy with customer work and trying to get my boat back together for the summer. My honest opinion of the porting is that they are not that great. I showed them to Mike Lewis and he told me he had a pair ported very similar once, and they did O.K. Ports are big but there is little form or design. Mike talked to Tommy Ivo once and Tom told him that all they did in the old days was make them as big as they could without going into water. Thats about my take on the work that was done to these. After the holidays Ill try to put some pics up. The aluminum heads that Max cast live here in Fresno, or so they did 4 years ago along with one of the Ole Yellers. They have some interesting design on the intake floor, they are not flat they are tall and back cut at a steep angle. The owner let me look at them but they did have valves installed so I could not see very much on the exhaust. At that time they were for sale for $4500. Since my blower motor is on hold, come spring I am going to start working on an intake for my 425. Im not sold on cutting the intake flange off. Yes, a nailhead intake is parasitic but so are most dual plane manifolds. 426 Street Hemi manifolds are terrible, switching to an Edelbrock Rat Roster was worth about 30hp. Large open plenum box intake, similar to what Chrysler ran in NASCAR. It only has about 1 of runner inside.
There's a guy in Ca. that actually took the oil galley out & replaced it with a piece of black pipe. He made a 5/8ths. stoker & 7/16ths. rod bolts. He had to put even more clearance in the bottom of the cylinders for the rod bolts to clear. Not to mention the lowering of the oil pump. We had to lower the pump on my friend's Henry J with the "Nail" in it. Not as easy as one may think, everything's on an angle. Tom T.
