newe alternator question

[ezekial130 10+ year member]

i e-mailed matt at mechman and i got quoted for 200a for 299$ and 250a for 399$

is an extra 50a worth 100$?

and extra info im running my DD m3 and my diamond d3 will i need the extra 50a?

whats my best bet guys?

Click to read more...

 

[loopkiller 10+ year member]

It goes without saying that the more power the better, but I will say that the 200a should be just fine with that setup. Also, anything over 200a usually is not going to last very long in a daily driver setup. Some of the bigger alts are for competition use only. They are made for very short run times or else they will overheat.

I would also highly recommend a group 31 AGM battery in the trunk.

 

[hoss 5,000+ posts]

Ask what RPM those alts put out power at. The smaller alt could actually be more useful for you depending on engine speed compared to output.

 

[loopkiller 10+ year member]

Ask what RPM those alts put out power at. The smaller alt could actually be more useful for you depending on engine speed compared to output.

^^^^ That too! //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[ezekial130 10+ year member]

thanks loopkiller you have been quite helpful to me.

any other places that puts out good alts and maybe at a cheaper price? i don't mind 299 but if anyone knows of a cheaper one that works well im always in.

replied to matt finding out what it puts out at certain rpms.

 

[99grandprixGT 5,000+ posts]

let me know what others you find. im looking for my grand prix as well.

 

[ezekial130 10+ year member]

from the minimal searching i have done you me and blackbonnie are the main people with grand prixs on this forum. he has on his build log mechman alt coming soon. so thats one prix with one!

 

[Enellz 10+ year member]

I seen a 200 to 220a alternators on DB electrical for 220 to 240 ish.

 

[99grandprixGT 5,000+ posts]

thorshammer1 has a grand prix his sig shows 220 amp alt but not sure of the brand. his profile here

 

[MECHMAN 10+ year member]

There are several primary differences between the ProPower 200 amp units, and the 250 amp Rhino series units. Both units are perfectly fine for daily use, with excellent output at idle. You can see full output curves here: http://www.mechman.com/types.html Remember that the RPMS listed on the graphs is ALTERNATOR rpm, not ENGINE rpm. You need to divide the alternator RPM by your vehicle's pulley ratio to determine engine RPM; most vehicle have a 3:1 pulley ratio, so divide bt 3 as a rule of thumb.

The 200 amp is built with 50A diodes, aluminum rectifier plate, uses a conventional ouput stud, HD bearings, and HD regulator. It produces 125 amps by 800rpm engine speed, is made here in the US with 100% new parts, (not remanufactured) and includes a full birth sheet from it's dyno session. (a MechMan exclusive) 1 year warranty

The 250 amp Rhino series is built with 70A diodes, 3/16" Copper rectifier plate, Oversized positive and ground studs, adjustable voltage (on select GM models only) HD regulator, HD bearings and produces 150 amps by 800 rpm engine speed. Made in the US with 100% new parts, includes a full birth sheet and 1 year warranty.

Because both units are based on a custom machined LARGE case housing, overheating is not an issue, as it is with overwound, rebuilt stock rectifier small case units. (like you get for $240 on E-bay) Here is the difference between our units, and other high output companies: http://www.mechman.com/size.html

Hope that helps, feel free to email me any questions, see my sig.

 

[ezekial130 10+ year member]

thanks a lot for the extra info!

probably in for one soon!