drumminfoolz

its a 69-79 350 that is already bored .060 over. i think the deck has been milled already. the pistons are keith black hypeuretic flat tops. i was wondering if all i need is a 400 crank, or will i need different rods and other parts?

soxbaseball

dont you mean a 383

drumminfoolz

a 383 is bored .030 over. a 388 is bored .060 over.

Orr89RocZ

iTrader: (20)

60 over is gonna end up being a 388 actually.

I'd get a 383 designed stroker crank and rods for those pistons. What is the piston compression height? Are they designed for a 350 3.48" stroke or what? If they are you'll need to get pistons designed for 3.75" 383 stroke, and order them instead. If you use Iron heads, get some dished pistons as flat tops will put you at 11 to 1 compression. Need aluminum heads for that

400 crank is the old way of doing things. 383 designed cranks are abit better if trying to build a 383-388 as they have proper 350 mains for your block

quickkris2006

iTrader: (2)

think someone could throw up some part numbers for whats needed? ive alway wanted to have a 383 stroker

drumminfoolz

i have no idea what the compression height is. so all i would need is the 383 crank, and pistons designed for a 5.7" rod, right? that way i wouldnt need new rods.

InfernalVortex

iTrader: (4)

You can use 5.7 rods with a 383, but I think a lot of people go up to 6 inch rods. Up to you.

You need the whole rotating assembly. Stroker crank, rods, and pistons designed for the 3.75 stroke and the length of rods you're using.

Then you need to clearance the block for the longer throws on the crank and rods. Then you need to make sure none of your rods hit your cam. You may need to get a small base circle camshaft. Then you have to deal with the balancing and using, most likely, external balance parts. So you need a new damper and flywheel/flexplate.

Orr89RocZ

iTrader: (20)

measure from the center of the piston wrist pin hole to the top of the piston and you'll get a compression height. If its anywhere near 1.56 then its a 350 type piston for 5.7 rods, giving total deck height of 9.000" which is zero deck machined block

383 with 5.7 rod will use 1.425" piston. 6" rod uses 1.125" piston for 9.000" zero deck block
6" rods are nice for motors that will turn some rpm as it keeps piston weight down. It makes it abit easier to balance the crank too.

91interceptorZ

iTrader: (3)

New rods are relatively inexpensive...and you might be able to get a kit to save you some money....say from scat. you will need the right pistons though as other have stated.

There are different combos you can use...but my understanding on rod length is this......5.5xx rod for a lot of torque (rare and hard on block)....the normal 5.7 rod (good all around torque and power), and what most people are doing now the 6.0 rod (more top end and rpm)....I don't know the exact tech. data why the different rod lengths change how the motor runs, but it just does.

OutlawCaston

you have to get a 1969 350 4bolt main built from canada its factory made with 60 over already all you do and only with 350 4bolt mains that you can pull the 350 crank out and put in the 400 crank automatically becomes a 388 stroker if you want to make your top end as good as your bottom end then go to a 1974- 1975 Buick 350 engine pull the throw arms out of that engine becouse there 5.5 inch throw arms that keeps the top end hp up as well the shoter the stroke the more hp you have with a 3/4 race cam and 882 street racing heads on it and a eldelbrock aluminum highrise intake with a 1250 cfm carb on it and you will have an old school High performace Engine a whole lot of Horse Power. a 2 bolt main is only turned into a 383 stroker becouse it can not have the true 400 crank its to week to handle the torque bottom end HP it will snap and break
so make sure you get a 4bolt main if you plan on a 388 stroker

OutlawCaston

NPO what you need is a 350 4bolt main engine by pulling out the 350 crank and putting in the 400 crank it automatically becomes a 388 stroker thats hoew its done if you want a 383 stroker trhen leave the 350 crank in or use the week 350 2 bolt main engine and slip in the 383 sroker made crank shaft for that other wise my personal opinion is go with the 1969 canada 350 4 bolt main built engine becouse its already factory from them 60 over with out cutting away any extra steel from the block and there you go and as well go and now tell the auto parts sales guy you want 5 and a 1/2 inch throw arms cranck piston arms for a 1974-1975 Buick 350 engine use those trow arms make sure you tell them Molly throw arms 5 and a 1/2 inch ok now as well put in molly racing pistons and rings and molly bearings and caps and molly journals and molly grease lube for them as well and put up the 400 crank into it and there you go and a good 3/4 race cam and you can if you want put 882 street racing heads on it to ok well there you go you know have a racing engine.

86LG4Bird

iTrader: (1)

Well, sonofabitch............NOW we all know how it's done!

Night rider327

iTrader: (13)

All of what you said is a joke right? Please tell me it's a joke because NOTHING you said is right, or true

sofakingdom

iTrader: (1)

That WAS pretty funny stuff, actually... better than I could make up, for sure.

Now back to reality.

stephenscamaro

Throw arms? Huh?!