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1966- 327 Corvette no factory PS. I have the third crank shaft pulley and it line ups up the the outer groove on the PS Pump pulley. [But the outer groove on the PS Pump Pulley hits the frame.
IF I use the inside groove, it would have to run the A/C pump, and water pump along with the PS pump which seems like a lot of work for one l o n g belt....
Any ideas? Belts line up perfect Pump pulley hits frame and you could never put a belt on it without removing the pump...so far Borgeson has not provided an answer....
Last edited by karkrafter; 12-18-2017 at 04:46 PM.
I'm trying to figure this out on the fly fellas....
Borgeson supplied me with a two groove Pump Pulley, research tells me this is for a BB not a small block, they show a one groove pulley # 3770509...now mu question is if you uest the ONE groove pulley which of the three positions on the crankshaft pulley does it coincide with? I NEED to to go to the outermost groove [closest to radiator] The other two grooves are spoken for on the crankshaft....
I added Borgeson to my 72 350 with a/c and no p/s and the pump had a double pulley. I also added the third pulley groove to the crank pulley and the belts lined up like this. I don't know if it helps, but see what you think.
I added Borgeson to my 72 350 with a/c and no p/s and the pump had a double pulley. I also added the third pulley groove to the crank pulley and the belts lined up like this. I don't know if it helps, but see what you think.
My set up appears the same as yours, BUT the double pulley hits the frame....did you have a problem slipping the belt over the pulley? It's IMPOSSIBLE on mine without removing the pump...
best as I can tell the single pulley is 5 1/2 Dia while the double is 6 1/8 dia. Guessing this is why you have clearance and I don't. No there is additional clearance no matter where the pump is, it goes from hitting at one extreme to less than 1/16 inch in the other, certainly no room to slip a belt in
I just went thru this issue with the Borgeson "kit" for my 65 with 327/300. The supplied two groove pulley would not line up with the third groove on the added CS pulley. Try a single groove GM 3770509CE PS pump pulley.
The cast iron pulley supplied by Borgeson hits the frame on sbc cars. Its a Paragon reproduction # 1353 clearly marked BIG BLOCK, Borgeson offered me another cast iron Paragon Pulley but that too is WRONG as BOTH the cast iron pullets are 6 1/8 in dia.
For my application I have found three pulleys that work fine,
GM #'s 3860457 AND 3770509, as recommended by another poster here.
Both are single groove stamped steel [not cast iron] and are importantly 5 1/2 inches in diameter.
The difference between these two GM pulleys are that the belt rides 1/2 in lower in the 3770509 [acting like a deep groove?] I imagine that pulley would be preferred for HP application. I found a used 3860457 which works fine for me. The 509 pulley is re-poped by everybody.
The third pulley that would work is a GM 3941107 DE, This is a double groove pulley for those who for whatever reason need to use the INSIDE groove or BOTH Grooves. It too is 5 1/2 dia and will give the proper clearance.
Thanks to you fellas for helping me on this and Hopefully this info may help the next guy....
Last edited by karkrafter; 12-19-2017 at 11:07 AM.
12-18-2017, 04:16 PM
Borgeson Power Steeing Pully hits
Dennis
