Tokyo and I are trying to mount a 283 into my '31 Chevy.. We're a little concerned about the clearence between the block and the radiator. Assuming we use a short water pump, what's the minimum distance required between the block and the radiator? We're gonna keep working on it, but I'll check back in a little while. Thanks, Ed
I have no idea which water pump I'm using, and my block is a 350, so for what it is worth, I have 7.25 inches between the block and the little pilot nub for the pulley on the front of the water pump pulley. So, basically, from the front edge of my pulley to the block I have 7.25" you'll want to add whatever clearance you'll need for your fan blades to clear.
providing you are using a short pump/small block chevy= it should be no less that 30-1/2" from center firewall to radiator core.that would be tigh 1/2" on each end. if it can be done 31- 32" would be best. from back of block[ rear of dist cap on a point distributor to end of waterpump mshaft is 29-1/2"
deyomatic has a long water pump at 7-1/4" ..the short pump is 5-7/8" from the tip to the surface that mounts to the block...give youself at least 1-1/4" clearance to the radiator...this of course depends on the thickness of the radiator you will use( walker's corbra is thin...their z-line is thicker)...what fan...mechanical or electric...or both?
on my model A i got 9.5" from the rad to the face of the head. its a 350 and im use'n a short water pump. i tryed it out with a fan, and i have about an inch clearence between the fan and rad. hope this helps. ttyl eh.
Cool. Thanks for the replies, guys. 10" is gonna be tough. Fortunately, the firewall is recessed to clear the stock inline six. That recess will be nice for the distributor. Thanks, Ed
PS- Toke and I picked up a short water pump.. holy balls is it shorter than the long water pump. Anyone have any recommendations for thin mechanical fans?
I have a pinto fan on my stude. Had to slot the holes a little. Works OK, but I'm gonna have to put a shroud on it. It was the smallest dia. I could find at the pull & save.
from where the water-pump bolts on to the fan (with a 2" spacer) is 8". Then an additional 2" of clearance to the radiator, that's 10" on my "A" coupe.
For some reason, fans are tough to come by at the junk yards. They seem to be the first thing to go. When they're there, they always seem to have big old ugly clutches on them. Finally found one in a buddys garage.
If you lift the radiator cap UP........ Place a small block MOPAR under it...... Then replace the rad cap.......... No need to worry about LONG or SHORT pumps....... Everything will fit properly............. NO PROBLEM! You're welcome..............
Somewhat different.....but the same. I always try to use a ZIP pump on the early stuff. They are made by Level Green Manufacturing. It bolts up like a stock SBC short pump buy it raises the fan 5 inches........so you can use a 18" fan and not hit the bottom radiator hose. It has a built in alternator bracket cast in to it. They are cast in aluminum. A 6 cylinder Chevrolet pump (194-230-250) is used. I have one on my Deuce and a 18.5 inch 7 blade fan. Most street rod supply houses have them....about $200 and well worth every dime.
[ QUOTE ] Toke and I picked up a short water pump.. holy balls is it shorter than the long water pump [/ QUOTE ] That is why it is called a short water pump
[ QUOTE ] Somewhat different.....but the same. I always try to use a ZIP pump on the early stuff. They are made by Level Green Manufacturing. It bolts up like a stock SBC short pump buy it raises the fan 5 inches........so you can use a 18" fan and not hit the bottom radiator hose. It has a built in alternator bracket cast in to it. They are cast in aluminum. A 6 cylinder Chevrolet pump (194-230-250) is used. I have one on my Deuce and a 18.5 inch 7 blade fan. Most street rod supply houses have them....about $200 and well worth every dime. [/ QUOTE ] I've seen those before and wondered what they were. Thanks for clearing that up. Anyway, $200 = not for me. I'm sure they're worth the money, if you have it Ed
Duece, is correct about running the waterpump.. Its a great way to us a fan.. Its raises the waterpump centerline.. Seems to be a Southern thing, as I really never noticed them before moving down here.. If you are going to run a stock SBC short waterpump you also have to decide if you are running a single or double pulley, it all takes space...
[ QUOTE ] Duece, is correct about running the waterpump.. Its a great way to us a fan.. Its raises the waterpump centerline.. Seems to be a Southern thing, as I really never noticed them before moving down here.. If you are going to run a stock SBC short waterpump you also have to decide if you are running a single or double pulley, it all takes space... [/ QUOTE ] I would like to run the single pulley, as I would imagine it's shorter. Will that work out between the generator, fan, and balancer? Thanks, Ed
Answered my own question... stock '57 Chevys used a single groove pulley. The complete 55-56-57 Chevy service manuals are online at: http://www.55-57chevys.com/coccc/techhelp.html Ed
Single pully and double pully bolt on the same way, and take up no more space on the waterpump with respect to the fan. Dan
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