Steel vs. Aluminum Pulley questions??

[Yedi]

not a turbo V6, but on my SBC, I currently have Chrome steel water pump and crank pulleys (water pump is a double groove, crank is a triple groove)

I want to put Billet aluminum pulleys on, but heres the problem, the current measurements of the steel pulleys are as follows: Water pump pulley is 6" diameter, and crank is about 7 3/4" diameter, I cannot find billet pulleys in these sizes, any ideas?? Most billet crank pulleys I've found are 6.6"

this will slow down my accesories, correct?

feel free to post links.

 

[DailyDrifter]

Should speed them up.

 

[novaderrik]

don't screw around with aftermarket aluminum pieces.. use the stock steel stuff that flat works.. and it's cheap.

 

[49-blues]

March pulleys i believe make them.

 

[mikestertwo]

this will slow down my accesories, correct?
.

Correct, the 6.6" will slow the accessories down. I assume you want them for show otherwise I agree to stay with stock steel non-chromed pulleys.

 

[gnxtc2]

Look into Billet Specialties

Billy T.
gnxtc2@aol.com

 

[Yedi]

thanks guys.

The chrome steel pulleys I currently have are from Summit. They don't seem to run "true" Like theres a slight wobble to them, and when it's cold you can hear a slight noise coming from the belt at low RPM's. (this is on a brand new Crate engine, so I know stuff isn't bent)

They are cheaper pulleys, so I thought by getting machined Aluminum pulleys that would run "true" I wouldnt have any more issues.

I cant afford to slow down my accessories any more, I have a High output Alternator and need all the amperage at idle I can get (large stereo system) And my AC is already too slow @ idle, makes a weired noise under 1,000 rpm.

I'll keep researching this, I just don't understand the size difference though, as to why they don't make larger Aluminum crank pulleys than 6.6"

 

[Yedi]

March pulleys i believe make them.

yes they do.

I looked on their website, and found the right part numbers and ordered them through summit, they have a 7" crank pulley and a 6.25" water pump pulley, should work great for me, but MAN, are they pricey, $96.88 for the crank pulley and $86 for the water pump pulley. They are clear powdercoated so I'll never have to polish them.