V-belt pullies for 5.0

88 Fox GT

Active Member

Nov 18, 2002

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#1

• Sep 4, 2004

• #1

Ok, I have a situation here. I am converting the 5.0 to a V-belt system. You may ask why, but I just figure since I will have a dead pulley where the smog pump was, a dead pulley were the A/C was, and a dead pulley where the P/S was, I might as well just put a V-belt on it. That way, I have one simple belt running to alternator and waterpump (and of course crankshaft) where I need it. I can also get rid of the big huge brackets and won't have a belt running around 3 extra dead pullies. Anyway, I need to find a single v-belt pulley for the 50oz harmonic balancer for a 5.0, and a single v-belt pulley for the alternator from a 5.0. Anyone have any idea if anyone even makes theses? The reason I can't use the original V-belt off the balancer is because the 28oz (i think) has only 3 holes to bolt it into and the pulley also has 3 holes. The 50oz has 4 holes. Any help would be much appreciated!

 

66P51GT

New Member

Nov 7, 2003

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Cerritos, CA

Sep 4, 2004

#2

• Sep 4, 2004

• #2

Why not get a short serpentine belt and standard rotation water pump and call it a day?

$0.02

 

SnakeStang65

Founding Member

Jan 11, 2002

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Jasper, Indiana

Sep 4, 2004

#3

• Sep 4, 2004

• #3

You may not want to spend this much, but NPD offers a 3 bolt, 50 oz dampener. The other option is to go with a set of March pulleys.

John

 

88 Fox GT

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Nov 18, 2002

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Sep 4, 2004

#4

• Sep 4, 2004

• #4

66P51GT said:

Why not get a short serpentine belt and standard rotation water pump and call it a day?

$0.02

Click to expand...

Ok, maybe I could get the one pulley from March for the "V-belt to serpentine belt conversion" and use it?

But, if I were to set the whole system up like the V-belt was, and use the adjustable bracket for the alternator, would the serpentine belt hold the tension like the v-belt did. For instance, the alternator would be on stock v-belt brackets and I would pull it over for tension and tighten the bolts, would it hold tension?

 

allcarfan

The Answer Man

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Apr 8, 2001

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North Atlanta

Sep 4, 2004

#5

• Sep 4, 2004

• #5

You can use the alt pulley though, right?

Your best and cheapest bet is to take your crank pulley to a machine shop and have them fill in the other holes and tap 4 new ones. They may even be able to tap 4 new ones without having to fill the others in. I bet they charge next to nothing to do it.

 

88 Fox GT

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Nov 18, 2002

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#6

• Sep 4, 2004

• #6

allcarfan, I may be able to do that.

I found a kit I would be able to use with a shorter serpentine belt.
http://store.summitracing.com/partdetail.asp?part=MCH-1670&view=257#largerimage
But it's $185.

 

R

Ronstang

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Apr 4, 2004

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Sep 4, 2004

#7

• Sep 4, 2004

• #7

allcarfan said:

You can use the alt pulley though, right?

Your best and cheapest bet is to take your crank pulley to a machine shop and have them fill in the other holes and tap 4 new ones. They may even be able to tap 4 new ones without having to fill the others in. I bet they charge next to nothing to do it.

Click to expand...

This won't work as there is not enough material on the balancer for the three bolt pattern plus the 50 oz balancer is about an inch longer and even if the pulleys bolt on they will never line up. I just went through this. I even have a 70 model 4 bolt crank pully and it bolted right up to the late model balancer but the pulleys were no where near lining up. I took the balancer to my friend's machine shop and cut as much off the front of the balancer as possible but it still required that I space the waterpump pulley, and all the accessories, out .285" to get them to line up. I also redrilled the 3 bolt hole pulley to have 4 bolt holes.

The only good solution to this is to get a harmonic balancer designed for the swap such as the one sold by FRPP. If March sells a pulley kit then that is a good option also. The price will decide I guess but I would go with the harmonic balancer since the stock 5.0 one leaves a lot to be diesired (I have replaced 2 on normal cars due to failure) and replacing it would be an upgrade as well as solving you problem.

 

S

STSFCTN67

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Feb 5, 2003

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Denver, CO

Sep 4, 2004

#8

• Sep 4, 2004

• #8

When I converted my 351 to serpentine I found an inexpensive underdrive pulley kit on ebay. You do not have to buy the kit do a seach for "underdrive 5.0" and a few will pull up. I have an extra Alt bracket if you want it. It needs a new tensioner.

 

88 Fox GT

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#9

• Sep 4, 2004

• #9

So are you using a reverse flow water pump? I am not going to. I am just wanting to run the serptentine belt from my cank to the water pump and alternator.

How would I rig up a tensioner for this?

 

88 Fox GT

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#10

• Sep 4, 2004

• #10

Ahh, all I need to find is a V-belt pulley with 4 holes in it and a v-belt pulley with no fan for my alternator and I'm done. But, I can't find ANYTHING like it.

 

R

Ronstang

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Apr 4, 2004

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Sep 5, 2004

#11

• Sep 5, 2004

• #11

Speed_Demon1965 said:

Ahh, all I need to find is a V-belt pulley with 4 holes in it and a v-belt pulley with no fan for my alternator and I'm done. But, I can't find ANYTHING like it.

Click to expand...

Did you read my post? I have a 4 bolt crank pulley in the garage and you can bolt it on but it will never line up with the water pump pulley due to the extra inch length of the 5.0 balbancer. March does not make V-belt pulleys for the later 5.0 engines nor does Auto Specialties. I had to turn the balancer down in a lathe and still had to space out the waterpump pulley and the accessories.

The only option you have from what I have found is to either use the factory serpentine belt system or buy the aftermarket balacner that is the right 50oz imbalance and designed for the early v-belt pulleys.

 

66P51GT

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Nov 7, 2003

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Cerritos, CA

Sep 5, 2004

#12

• Sep 5, 2004

• #12

Professional Products makes a damper that accepts 3-bolt and 4-bolt pulleys. It uses a spacer to adapt the Serpentine systems. I purchased one for my engine build. Counterbalance is bolt-in and can easily be adapted for 28oz. or 50oz. applications. It is super verstatile and can be used for just about any small block application you can think of.

I purchased it on ebay for $61 + $14 for the right adapter for the serpentine. They also have a SFI approved version for around ~$150.

 

88 Fox GT

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#13

• Sep 5, 2004

• #13

66P51GT, thanks! I may have found one that will work.

Anyone know if it will for sure?
http://cgi.ebay.com/ebaymotors/ws/e...tem=7919665458&category=33616&sspagename=WDVW

 

66P51GT

New Member

Nov 7, 2003

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Cerritos, CA

Sep 5, 2004

#14

• Sep 5, 2004

• #14

That is the one. Get the spacer for the 4" long 5.0 damper and you should be set. As a reminder, you will also need a standard rotation water pump.

I will be running a v-belt to begin with for the alternator and power steering. I will eventually convert to a serptentine system but don't want to spend $80 for a serpentine pulley from KRC or swap out a brand new Edelbrock water pump.

 

88 Fox GT

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Nov 18, 2002

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#15

• Sep 5, 2004

• #15

I am running a V-belt because of the timing chain cover I have has a hole for the dipstick and is made for my normal rotation water pump. And I also have 2 out of the three pulleys it's going to take to run a V-belt system. I also thought to myself it would be pointless to run that HUGE serpentine belt around a bunch of "dead" pulleys and only two "live" ones running the pump and alternator (since I wont use a smog pump, p/s, or a/c). So, I will just use a V-belt for the time being.

What 4" spacer are you talking about again?