This is my first project from scratch. I have a 327 and i don't understand how the pulleys work. I have very little room and had to get a different fan so it would fit. A 3 groove pulley on the crank will not work because it hits the fan. I want to use an alternator and a compressor. Does one belt go around the crank, water pump and alternator? Then how does the other belt work? Can it go from the crank pulley directly to the compressor pulley? My water pump pulley only has one groove. I tried to search for a 327 picture thread but could not find it. I bought a two groove crank pulley. I am including a pic so you can see. I have not completed the brackets for the compressor and alternator. Please help without giving me too much crap. Thanks in advance. Oh yeah, pics would really help me.
Most common way, 1 belt for crank-wp-alt and 1 belt for crank wp-ac comp. double crank and wp pulley, single for alt-ac comp.
Can you get a 2 groove water pump pulley? That's how it's usually done. I would think you could with all the Chevy stuff out there. You could run it straight off the crank, but it will limit where you can put the compressor. You did mean compressor, right? As in A/C compressor? If you run it straight off the crank, you will have to be able to adjust the belt tension with the compressor mount. I'd just look for a 2 groove pulley. You have the alternator belt routing right, just do the same for the compressor in the second groove.
With the short pump the alternator normally sits on the driver's side of the engine and the compressor sits on the passenger side. Now, are you building brackets or ?? I am assuming that you aren't intending to run power steering so that is eliminated. If you want simple go to the wrecking yard and find the alternator bracket off of a late 60's up to 72 Chevy or GMC small block powered pickup. At the same time you might hunt for the double pully that goes on the fan, something like this one http://www.amazon.com/Spectre-4378-...ve&Make=Chevrolet|47&Year=1967|1967&carId=002 but there are stock or painted ones available. That way you can run one belt to from the crank to the water pump and alternator and the other one from the crank to the water pump and compressor
The stock short pump setup is designed for a rather wide engine compartment, the alt hangs pretty far off to the driver side, the ac pump hung pretty far off on the other side. You'll probably just need a dual groove upper pulley to solve your belt problem. I don't know if it'll all fit in tight enough side to side?
You are better off with the 2-groove waterpump pulley that way if you throw or break a belt you don"t have the overheating problem.
You need a two groove pulley on the water pump and the crankshaft. The alternator belt goes on the inside groove and the compressor goes on the front groove. New pulleys are available from Alan Grove, check out his website at www.agcbracket.com. His catalog is full of tips and dimensions.
ok so i found a guy on ebay who lives in mesa. went to get a 2 groove water pump pulley tonight. now all i need to find is a mechanical fan that will work. any suggestions? thanks guys for your patience.
That was going to be my suggestion also...a double groove crank pulley (easy to find aftermarket for short waterpump if you can't find originals), and an Alan Grove bracket (esp if the AC is a Sanden style). They make a nice bracket that will mount to the intake and the water pump bolts, which tucks the A/C compressor and alternator in more, and works even with older non-drilled heads. I used one on my '57 years ago.
Flex-a-lite 1017 - Flex-a-lite Universal Low Profile Flex Fans <fieldset class="item-disclose"> <legend>View Image and Compare</legend> <input id="compareCheck_FLX-1017" name="Compare" type="checkbox"><label for="compareCheck_FLX-1017" id="labelText_FLX-1017">Compare</label> </fieldset> Fan, Flex-Type, Low-Profile, Clockwise, 17 in. Diameter, Aluminum Blades/Steel Hub, Universal, Each Part Number: FLX-1017 More Detail … Estimated Ship Date: Tomorrow <fieldset class="user-actions"> <legend>Transaction</legend> $22.95 <input name="ctl00$_CtlContentPlaceHolder$ctl00$ctl05$_CtlQuantity$_CtlQuantityInput" value="1" id="ctl00__CtlContentPlaceHolder_ctl00_ctl05__CtlQuantity__CtlQuantityInput" size="1" type="text"> <input name="ctl00$_CtlContentPlaceHolder$ctl00$ctl05$_CtlCartButton$_CtlCartButton" id="ctl00__CtlContentPlaceHolder_ctl00_ctl05__CtlCartButton__CtlCartButton" title="Click here to add FLX-1017 to your shopping cart." class="cart-button" src="http://www.summitracing.com/images/system/sys_01_button_addtocart.gif" style="border-width: 0px;" type="image"> + Wish List <input name="ctl00$_CtlContentPlaceHolder$ctl00$ctl05$_CtlWishlistHyperLink$_CtlWishlistX" id="ctl00__CtlContentPlaceHolder_ctl00_ctl05__CtlWishlistHyperLink__CtlWishlistX" type="hidden"> I am forced to go with a fan like this, my dual belt waterpump pulley is 1 3/8 away from radiator. <input name="ctl00$_CtlContentPlaceHolder$ctl00$ctl05$_CtlWishlistHyperLink$_CtlWishlistY" id="ctl00__CtlContentPlaceHolder_ctl00_ctl05__CtlWishlistHyperLink__CtlWishlistY" type="hidden"> </fieldset>
That's tight! You may have to go with an electric fan set up. The flex-a-lite fan in the post above will not move enough air in a street car application. Also what about a fan shroud? Is there even any room for it? Without one, you could have a nine blade, three foot diameter fan and it still would not move enough air. If you have the shroud then you can try a flex fan, but I have replaced dozens of customers cars flex fans with stock big block clutch fans and solved severe cooling problems by doing so. A good elctric fan is compact, and if you get a junkyard stock one, they move lots of air! If you go that route, use an adjustable relay to hook it up. Just get it set to the proper temperature and you're ready to go!!
Electric fan for sure..alternator belt usually goes around crank,water pump....and powersteering around just the crank but really doesn't matter .that's how mine is set up.might have to get a balanced puller and installer from jegs and adjust the crank pulley to get it in line...and if you get a junk yard fan get a ford Taurus fan..they kick ass..older one..
I was thinking electric fan, too. Only coz the condenser for the AC unit will generate more heat, so when sitting still the temp wont go throught the roof. Also look int a decent fan controller that you can have permanent power on. Newer cars have this - super thin alloy heads means after you park the car, the temp rises before all cools down. A permanent power source to the fan controller means the engine can cool after you've walked away from the parked car. Just a thought.
You mentioned using a 3 groove lower pulley...I am assuming you plan on power steering, as well? Not sure, as you didn't mention it specifically. If so, the PS belt doesn't go round the water pump, the other 2 do. I've seen special 3 groove lower pulleys for Chevies, with a smaller front pulley, and normal size 2 closer to the damper. That might solve your fan-pulley clearance problem. Or just a slightly smaller diameter fan.
I plan to use the zips water riser, which will allow a 17" fan with a shround, and centers it well in the radiator. I have a friend that tried the stock waterpump location with the tinny fan and had heating issues.
I got a seven blade fan from East Coast Chevy for my car. I have a short pump, AC on the right and alt. on the left. I made my own AC bracket and used ram's head manifolds, both of which have bolt holes for mounting. Hard to tell how much room you have, but this set up worked for me. Go to my albums page: http://www.jalopyjournal.com/forum/album.php?albumid=22504 I have some photos of my AC set up.
Will a stock four blade GM mech. fan not work??? That being said, a friend of mine ran a flex fan on his sbf with a walker radiator and had no overheating problems. I used a set of P&J motor mounts to put a sbc in a Model A chassis once and the fan location was way too low on the radiator. I used Zip's (Level Green in those days) water pump housing to place the fan nearly in the center of the rad. They're a little pricy, but have both the alt. mt. and the a.c. comp. mt. built in... It worked great...
Factory setup with alternator and air conditioning would have been a two sheave pulley on the crankshaft and two sheave pulley on the water pump. That allows the inside belt to go around crank, water pump and alternator. Outside belt goes around crank, water pump and A/C compressor. If you had power steering that would have been a single sheave pulley in front of the two sheave pulley on the crank to run the power steering pump. Through the aftermarket you can get a three sheave crank pulley and two sheave water pump pulley.
How is the alternator belt supposed to be routed, rear groove or center? My 327 has 2 groove water pump pulley 3 groove crank pulley and one groove PS pulley. I had the alt belt on rear grooves(rear WP & crank), but now installing PS and the alt belt hits the PS bracket lower bolt. Does it matter if I moved the alt belt one groove forward or is that a non standard setup, will an A/c pump align with rear grooves later? If I did this I would have to move the whole alternator forward, is this standard?
slot the bolt holes to shift the bracket forward. Is the crank pulley billet? Pulleys are made for short wp and long water pump,are you buying the correct ones
my question for you guys is how do you plumb for a heater? i have the cylinder head bypass installed,everything works great,but here in ohio i need to plumb up a heater.any advice?thanks!!
One hosetail on the waterpump, and the other on the "engine side" of the thermostat [usually on the manifold]
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