Thinking about doing a low buck 318 stroker.....stock rods stock slugs just rebalancing the new Crank (maybe cutting the CW's for clearance if needed) for the stock 318 bobweight.

The way it looks the factory slugs in my 1988 roller shortblock (30K original miles) are .110 down in the hole....with the new 3.51 vs 3.31 crank it should put her right at zero deck.

This would make for a ~10:1 337" motor vs a maybe 8:1 318....if it all works out.

BTW anyone know the approximate standard factory Bobweight of a 318 motor? I figured i'd square deck and deckplate hone the factory block to standard size and balance the existing rods/pistons with some new ARPs and call it a day.

I bought a regrind cam (for $119.00) 236/240 @.050, .520/.540 lift....I figure I might need to Eyebrow the slugs a touch.

I call this my 'lack of Stimulus' Package motor, probably gonna sell some laying around parts to fund the project

what happened to all the smallblock guys??

Think it would be kind of cool to build a 318 based bracket motor, thought about a 4" stroke but it' been a while so I think a 337" mini stroker would be kind of fun.

Of course I could just go the 318 route with a set of the KB167's like Stve Dulcich did...the 3.51 stroke cranks aren't too hard to find so I can pick one up about as cheap as a cut down main 360.

Sounds like a fun build. I thought you were putting together a 360 sometime back?

This is the Back-up motor....I can't leave a prefectly good 30K mile 88 roller block just laying around...can I ????

I do all the time. Have you got the isuzu on the track yet?

umm...you mean Daihatsu!! Actually I'm rearranging the letters onthe grille to spell

Da $h!T

Tranny is out right now for new 9" converter but I hope to be racing within a few weeks.

Brian, Maybe you or Ryan can answer this....was the 59 degree lifter angle (actually 118 degree compared the 90 of the cylinders) just a left over from the Poly....so in other words a cost saver?

Never understood the logic of the odd angle

Put an 8" converter in it and let it rip. Good luck and keep us posted.

Yep on the lifter angle,saving some $$$ is the logical reason.

I am not ryan or brian but I do know the 59* angle is left from the poly motors. PR angle is not near as bad on them and they kinda go through a notch in the block. You can put LA heads on a poly block but not the other way around, at least not without a lot of grinding, welding, an more grinding.

Thanks, that's kinda what i thought.

Can you imagine Bob Glidden's face the first time he mocked up the valvetrain on his 340 arrow motor???

Hey, Wise I have a New MP 4529711 3.55 stroke crank I will sell cheap.
I am sure that it will not hurt those pistons to be above the deck a Wee bit.

Built pretty much exactly what you are describing. Used some low compression truck pistons 040over though. Nets to a 344. Can probably provide you dyno numbers by the end of the week.

It is running and seems fine currently.

Dont forget to factor in the cost of an 8 bolt flex plate or flywheel with that crank. I believe they were all 8 bolt.

I've built 2 3.51" MP Crank motors but both were circle track deals. 6.123 rods, 1.682 custom pistons. One is 4.04 bore (359) other is 4.02 bore (356)

The CW's on those things are heavy as hell, so neither of mine required any heavy metal to balance. Those 1053 old MP cranks are heavy pieces..... & the 8 bolt flange can be a bit of a pain.

correct, they have 8 bolts on the flexplate. Needed to get the right B&M-plate

Can anybody answer the typical 318 bobweight question? I know factory 340 slugs are a bunch heavier than the 318's.

Wize, Heres a 349 build that has some good 318 tech in it.

http://www.forabodiesonly.com/mopar/showthread.php?t=19556