mechman alt log

[UNDERGROUND_BUM 10+ year member]

i just got a mechman alt in today. what does the test paper say for amps at 16-1800 rpms on yours? mine is only at 17.7amps at 1600rpm and 54.9amps at 1800rpm. wont get up to 250amps till 6000rpm. please tell me how your guy's specs compare.

its because of the pulley ratio........... its really a bunch more output (so 1600 rpms, is really a lot more amps than 17.7 amps) because of their custom machined pulleys (extra small) i think they dyno test them not accounting for the pulley ratio or size. i would call matt, im sure he can explain it to you better than anyone here //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[basebalz13 10+ year member]

thats alt pulley speed, not engine RPM

 

[skittlesRgood 10+ year member]

so yours said about the same thing?

 

[Ali1 10+ year member]

like mentioned above, the ratings are alternator speed, not engine. Engine RPM is usually 1/3 of the alternator's speed, so divide by 3

 

[MECHMAN 10+ year member]

like mentioned above, the ratings are alternator speed, not engine. Engine RPM is usually 1/3 of the alternator's speed, so divide by 3

That is correct sir. The pulley ratio on your vehicle with the overdrive pulley should be about 3.2:1 .

2400 (rotor RPM) / 3.2 = 750 rpm at the engine

You should be all in (250+ amps) by 2250 engine RPM . (7200 rpm rotor speed)

 

[skittlesRgood 10+ year member]

again mechman demonstrates his great customer service. emailed me and answered the question on here. thanks again!

 

[Rob. 10+ year member]

Nice. I gotta order one of these mechamn alts !