Westerj Posted November 20, 2020 Share Posted November 20, 2020 Hi Gary, If i switch to a high output alt, would i convert vbelt to serpentine? Middle of a real estate shuffle and stork delivery ( grand daughter). Look forward to getting back into f350 project. John Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted November 20, 2020 Share Posted November 20, 2020 I'm not Gary, but I don't have a problem running my 130A 3G with a V-belt. I DO have a Load Response Control regulator.. Link to comment Share on other sites More sharing options...
Gary Lewis Posted November 20, 2020 Share Posted November 20, 2020 I'm not Gary, but I don't have a problem running my 130A 3G with a V-belt. I DO have a Load Response Control regulator.. Jim's in a much better position to answer your question than I am since, as he said, he's running a v belt on a 3G and I'm not. And, I fully agree with his recommendation of an LRC regulator. That's because even with a serpentine (ok, Bill, "polygroove") belt mine still squealed on startup with the "right now" regulator. But with a 2 second regulator it doesn't make any noise because the load is applied smoothly over that 2 second period. Link to comment Share on other sites More sharing options...
85lebaront2 Posted November 20, 2020 Share Posted November 20, 2020 Jim's in a much better position to answer your question than I am since, as he said, he's running a v belt on a 3G and I'm not. And, I fully agree with his recommendation of an LRC regulator. That's because even with a serpentine (ok, Bill, "polygroove") belt mine still squealed on startup with the "right now" regulator. But with a 2 second regulator it doesn't make any noise because the load is applied smoothly over that 2 second period. Mine would squeal the belt on startup and even after getting it tight enough to not squeal, I still found evidence (rubber dust) that it was slipping. I went to a slightly larger pully, problem solved. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted November 21, 2020 Share Posted November 21, 2020 Mine would squeal the belt on startup and even after getting it tight enough to not squeal, I still found evidence (rubber dust) that it was slipping. I went to a slightly larger pully, problem solved. That certainly couldn't hurt, Bill! More friction area and reduced ratio in one swoop. Somewhere Gary has a chart with pulley diameters and the alternator rpms you get at a given crank speed. IIRC, the gas V-8's had one size, diesel another and the 4.9/300 yet another size. Link to comment Share on other sites More sharing options...
Gary Lewis Posted November 21, 2020 Share Posted November 21, 2020 That certainly couldn't hurt, Bill! More friction area and reduced ratio in one swoop. Somewhere Gary has a chart with pulley diameters and the alternator rpms you get at a given crank speed. IIRC, the gas V-8's had one size, diesel another and the 4.9/300 yet another size. Documentation/Electrical/Alternators and the Output Vs RPM tab. Scroll down to Pg 4 and following. Link to comment Share on other sites More sharing options...
Weberman Posted November 21, 2020 Share Posted November 21, 2020 That certainly couldn't hurt, Bill! More friction area and reduced ratio in one swoop. Somewhere Gary has a chart with pulley diameters and the alternator rpms you get at a given crank speed. IIRC, the gas V-8's had one size, diesel another and the 4.9/300 yet another size. The amount of pulley sizes that Ford used was stupid. Luckily we usually just built cores out of cores but when building one we didnt have, there was a lot of pulley measuring. Link to comment Share on other sites More sharing options...
Westerj Posted November 28, 2020 Author Share Posted November 28, 2020 The amount of pulley sizes that Ford used was stupid. Luckily we usually just built cores out of cores but when building one we didnt have, there was a lot of pulley measuring. Thanks Guys!! Think ill leave v belt and car alt In place. Will re use cable.. 5/16" lugs Seem about right. Ordering cole hersee Isolator sized for bigger alt.thx, and happy Thanksgiving!! Now it's time for turkey Sandwiches! Link to comment Share on other sites More sharing options...
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