I am thinking about buying aluminum pulleys for my 351M. I need to know if the 351C or other ford V8's use the same pulley set as the 351M?

Thanks
Warren

 

[font size="1" color="#FF0000"]LAST EDITED ON 15-Aug-01 AT 11:55 AM (EST)[/font][p]Warren,

The 351C pulleys use the same bolt pattern as the M-block (351M/400) for both water pump and crankshaft pulleys. Other than that, I think the only other pulley with a bolt pattern is on the Thermactor air pump (smog pump).

Other than bolt patterns, the critical dimension is the pulley's offset (measured from the mounting flange to the center of the belt groove). If you don't get the right offset on all the pulleys (or use adjustment sleeves to get the right offset), the belts will not line up correctly.

The best way to find pulleys that fit your engine is to measure the offset and diameter of each pulley, then check the specs on the pulleys you are considering.

I'm pretty sure March makes billet aluminum pulleys that will work on your engine (I used some on a 400 a few years ago). However, those are probably more effective as an appearance upgrade than a performance modification.

BubbaF250

1980 F250 4x4 Custom, 351M/NP435/NP208/D44HD-TTB/D60-FF/3.55s 6750 GVW, Rust & White.

 

I just painted mine with cast aluminum rattle can paint. Dust it on and it looks good and last well. Heh, heh.

1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything

 

Thanks for the info.

Warren

 

Pulleys. My experience.

I bought a set of Auto Specialties 1100 rpm charge pulleys for my Mustang about 3 years ago. I subscribed to the less parasistic horsepower loss to the thought that the power steering pump will love you for it, after all, it was designed for grandmas Grenada, and not doing 5000 rpm power shifts at the track.

I can't honestly say that I realized any gain at the track; it still did low 14s upper 90s before and after the swap. I did also change the 195 thermostat to a 180 to account for the lower coolant flow.

I didn't mind the the pulleys.

I did have to modify my driving habits, keeping an eye on the ammeter at stop lights and such. As long as the car was rolling in any appropriate gear, it was charging. But at long stop lights the headlights would dim significantly, ditto in the winter using the rear defogger. Sometimes I turned them off waiting at the light. I didn't drive the car back and forth to work much but I can say I NEVER, EVER, drained the battery down to where it wouldn't start. I admit to always carrying jumper cables just in case.

Fast forward a couple of years. Fiance moves in with me. Starts using the Mustang more often. With the pulleys, its not "fiance' proof". It seems like every third trip, to work, the store, picking me up at Reagan National airport..... she needs to jump start the 'stang. The good part to her is that she NEVER seems to have a problem finding someone to help her though .....

Anyways, this past Saturday, while she was shopping and unknown to her, I swapped out the pulleys for the factory originals.

That night she takes the 'stang out for a spin somewhere and returns, asking "did you put some good gas in the Mustang? Its running GREAT! I don't think its ever run that good before."

hmmmmf. Go figure.

I did like the quality of the AS pulleys. Never had a problem with them at all. Mine had the black finish.

Your mileage may vary.

Chris
'88 F350 XLT Lariat CC DRW/7.5l/C6/4.10
'93 Mustang LX 5.0l/T-5/3.55's/Flo's/pulleys (not any more) /K&N/Synthetics
Nissan p/u (DC commuter)
Volvo 940