Thread: max stroke tall deck 427

Tweet

I have been doing some looking on my 427 tall deck and I was wondering just how far can you stroke this engine.

i told you no more that 4 1/2 and go to your room!!

Why cant you go further. Crower has a crank that is 5.20. Is there judt to muck grinding needed.

you are not right?? a 5 .00 stroke ??first thing you do not have enough block the rods will not fit in the block you will cut the oil pan rails out and hit the main oil gaily and then you will have junk the oil pump will not fit in the block. the cam will hit the rods .and why would you go to 5.00 stroke with a 4.310 bore??do you know how much this cost $ 2500to 3000. for the crank and you need a long rodswith small, block rod size $1700 or titanium$$ so you do not cut the hell out the block and if you are lucky the cam will fit ?? you need small base circle cam$300.+ and a set of custom pistons you need to get 9 so if you hammer one you have a back up if you smoke one it at one time cost 400 for just one for the set up. custom set of pistons $1200 or more and you will have to make or buy a oil pan and do not forget THE MALLORY METAL HANG ON TO YOUR ASS ONE BIG BLOCK I HAD THE COST $$1000 TO GET IT BALANCED THE 5.00 STROKE IS NOT MADE FOR THE 10.200 BLOCK THE PISTONS WILL COME OUT OF THE BOTTOM OF THE BORES if this would fit and it will not the rod angle will be crap the 525 is the best way to go with the small bore

i just purchased a 427T from a fellow that has been bored to 4.375 and has 4.5" of stroke. his buddy built the same motor and ground just a little to far and got into the water jacket.if this is any help to you.

If they sell the 5.00 inch crank then what motor would it fit. Being a tall deck you'd think you could get a longer stroke in it than the standard deck. I guess it just dosent make sense to me. Sorry if I bug you I have a lot to learn about a big block. And did you mention donivan heads? what are those. Also my buddy just put together a 396 and they said it had to idele at 1200rpm because the came is rated from 1200 to 6000 or so.

the 4.1/2 is the way to go i have built some you do not get nut s with the grinder his is not a job for a half ass it is a lot of work you will have the crank in and out many times the threads posted back to you i have gone over this with you. for get it the crank will not fit if you had a hi cam block .you do not and it was 10.500or taller it would work so for get it the block will not take it a donovan and word products make blocks to fit 5.000 +crank in them do you have $20.000++? i have done tall deck from 526 to630+ i do know what i am talking about this is first hand to you not some guy that seen it in hot rod mag or knew some guy that did one i have done it with my two hands and it is not a re ring job i have just came back from my shop working on 632 heads for customer i have spent four hours on my mill to make the deck plates fit there will be time spent many hours you will need tools a mill a tig welder a drill press a lathe quality mikes bore gauge and snap gauges and dial indicators and stands calipers and more i would never say you cant do it but i think you need to take small steps before you run has far as the water deal hell yes you can cut in to it and in the oil so you better know how much meat you have

thanx for clearing that up like I said I dont know much about these motors and other aftermarket ones avalible. What about those donavins and seting the idele on that cam.

i do not think that rigth on the cam that is the rpm band on the cam . a cam for lets say a 454 to 468 will run different in a 396 smaller engine etc .but it will idle be low 1000 rpms unless you have a cam from hell big lift over 600 and 260 @0.50 DURA ON 108 . about the donovan blocks they make nice stuff it is not cheap get on the web and look at it .IT IS $5000 FOR A BLOCK AND THEY NEED TO BE FINSH MACHINED

so if i do the 4 1/2 stroke and use the gm oval big ports would it build over 500 horse and what size carb would be best with not to much over kill i would like to run 12.9comp. will i have to run alky. are the heads cast or aluminam and do you know if the ones in the PAW catalog are the same.

Pat Mccarthy if you dont mind me asking do you do work for anybody in your shop. And where is it (state) i live in Michigan.

cam plays a lot to do with the hp but the heads do to for rpm hp and torque iron gm s 781 or edebrock rpm s heads edl-60459 will work to build for torque will it make 500 hp yes and 12to1 can be done i ran a 14.5 548 big block on the street with a 748 lift cam with 278 at 0.50 on a108 it was like a chain saw i ran races gas in it but it was one hell of a ride never had no trouble with it no bs i ran it for three summers and sold it to a guy who put it in a tub out model A roadster for the street very very bad

i have a small shop right now i am working on a 540 i built for a customer it is dual turbo engine that i did the engine work and the headers on and the intake work on i have been working on big blocks engines for 20 years i was a body man and painted cars for 20 plus years i worked on boats but i like cars i do my engine machine work at my shop i do a litte of every thing make parts make new parts fit my customer are from all walks of life if you need it done i am the guy most people see custom headers engines welding fab work maching if you want to go fast and low on money they see me i have built some killers if you want to stop by i can tell you were it is by bay city

I am about three hours from threre in Manton near Cadilac. I would love to come see your shop, and maybe have you do some engine work. Are you open on weekends? I would like the most power I can get out of this engine being naturaly asperated,(no blowers/tuboes) maybe 125 or so of nitris. I am looking at the merline heads i dont realy want aluminam heads because in the bogs they atomaticly put you in the last class.

By the way pat do you know Brad Sidale he has somone over there build his motors for his dirt track car. I was thinking maybe it was you. He is my cousin.