Small alternator pulley

[Otamiway]

I sent the first pulleys out this morning and discovered the shipping price is off a little. For those that already have paid you hit the lottery j/k.
The total price for the pulley and shipping is now $66.10. For now, I can't seem to edit my post above with the price.

Another note: I decided to include a shorter stainless adjusting bolt in with every pulley whether it is for the stock 80 amp alternator or the upgrade 130/150 amp alternators. The bolt with the upgrade bracket would work but just stick out further. The couple of bucks for the bolt is not work the different packaging hassle.

Bill

Bill

Just saw this after I sent my funds. Thanks again for making this availble to us..

Stu

 

[Tools R Us]

... As the pictures show the Mean Green put out 84 amps with the stock pulley, and 91 amps with the small pulley. ...

Shows once again, that the "Mean Green" is a stock rebuild, not an upgrade, so not worth the $$$.

 

[Wheelingnoob]

I cant believe how much that Sequoia Alt puts out!! Even with the stock pulley its above what its rated too. Very impressive!

Cant wait to get your bracket and pulley some day.

 

[Otamiway]

Got mine today

Bill,

Thanks for another excellent product.

Well packaged and includes everthing I need. Loctite is a nice touch.

Quality work my friend.

Now off to find that 150amp Alternator

Stu

 

[NLXTACY]

Got mine as well!!!

 

[Photoman]

I sent several out Saturday morning to all parts of the country and all the receipts said expected delivery was Monday. I thought it was some kind of mistake but it looks like the USPS really deserves a pat on the back.

Bill

 

[Photoman]

The other day azTony asked me a very savvy question regarding the rpm's of these alternators with the new pulley as related to the rpm's of the alternators when stock on the Sequoia. As stated in post #2 of the upgrade thread I did not know. So today I went to a “salvage yard” about an hour from my house that had some 4.7L motors from Tundras and Sequoias that the upgrade alternators come from. I measured the crank and alternator pulley diameters. On all the motors I measured the crank pulley diameter was 5.47 inches and the alternators were 2.257 inches. Checking here, for a 2006 Sequoia with the 4.7L motor it shows 273HP at 5400 rpm. With this online calculator using 5.47 inches for the powered driven diameter, 2.257 inches for the driven pulley, and 5400 for the input driver (engine) rpm's the output (alternator) rpm's are 13084.
The new pulley from averaging actual testing I did with a IR tach comes in at a ratio of a little less than 3 to 1 on the alternator on my 1993 Landcruiser. Using the above same site for a 1997 Landcruiser the motor is listed as 212HP at 4600 rpm's. With 4600 engine rpm's and a 3 to 1 pulley that is 13800 alternator rpm's. All measurements were the best I could manage.

Bill

 

[azTony]

That my friend is above and beyond. Bill, we appreciate your dedication

 

[CycloSteve]

Bill, what is the going rate for the bracket and pulley as a combo?



Steve

 

[Photoman]

I could fit them both in one box so there would just be the one shipping charge. $148.10 total including including the Toyota electrical connector and US shipping.

Bill, what is the going rate for the bracket and pulley as a combo?



Steve

 

[EricG]

The other day azTony asked me a very savvy question regarding the rpm's of these alternators with the new pulley as related to the rpm's of the alternators when stock on the Sequoia. As stated in post #2 of the upgrade thread I did not know. So today I went to a “salvage yard” about an hour from my house that had some 4.7L motors from Tundras and Sequoias that the upgrade alternators come from. I measured the crank and alternator pulley diameters. On all the motors I measured the crank pulley diameter was 5.47 inches and the alternators were 2.257 inches. Checking here, for a 2006 Sequoia with the 4.7L motor it shows 273HP at 5400 rpm. With this online calculator using 5.47 inches for the powered driven diameter, 2.257 inches for the driven pulley, and 5400 for the input driver (engine) rpm's the output (alternator) rpm's are 13084.
The new pulley from averaging actual testing I did with a IR tach comes in at a ratio of a little less than 3 to 1 on the alternator on my 1993 Landcruiser. Using the above same site for a 1997 Landcruiser the motor is listed as 212HP at 4600 rpm's. With 4600 engine rpm's and a 3 to 1 pulley that is 13800 alternator rpm's. All measurements were the best I could manage.

Bill

Very nice - I was a little concerned that the smaller pulley would be running the alt to fast at highway speeds and reducing alternator life/reliability. But it looks like this puts it right into the proper designed range.

 

[CycloSteve]

I could fit them both in one box so there would just be the one shipping charge. $148.10 total including including the Toyota electrical connector and US shipping.

Interested, PM Sent.

 

[OGBeno]

Thanks again Bill!

 

[pgmatt]

Ordered! Thanks you rock Bill!

 

[rhyary]

Why can't the pulley replaced in place?

Sent from my iPhone using IH8MUD

 

[Photoman]

The short answer is if you think you can hold the pulley and tighten the nut up to 85-90 ft·lbf then go for it. Be careful of the radiator nipple while pawing around down in there.
Keep in mind these pulleys are just held on by a nut. There is no keyway so they are just tightened against the bearing face. The FSM shows a procedure using a SST to turn the rotor shaft inside the pulley nut torquing to 81 ft·lbf while held in a vise.
If the pulley is not tight it can spin on the alternator rotor ruining the pulley and perhaps the alternator rotor. A smaller alternator pulley is more prone to slipping than a larger one.

Why can't the pulley replaced in place?

Sent from my iPhone using IH8MUD

 

[Photoman]

Very nice - I was a little concerned that the smaller pulley would be running the alt to fast at highway speeds and reducing alternator life/reliability. But it looks like this puts it right into the proper designed range.

I would have preferred to do an actual IR tach test on the Sequoias pulleys but this calculated answer is the best I could come up with. If anyone knows someone with a Sequoia with one of these alternators that would be willing to run a test maybe they could post up the results. I'm just a hobby guy (now machining hobby) without access to these vehicles.

Most of these alternators that folks are using are coming from salvage yards and have some (many?) miles on them already. So the bearings and brushes have already been around the block so to speak. If a person is just going to flog the engine all the time then this is not for them. In fact as the numbers show once the alternator gets to a certain point there is diminishing returns from spinning it faster. There is no doubt that this pulley is going to spin the alternator faster than the pulley that was on there. Any time we mod our cruisers for this hobby there are some trade offs.

Bill

 

[rhyary]

Please note FSM says 39 N*m or 29 ft-lbf. NOT 81 !!!!

 

[rhyary]

Bill,
Did I missed the AMP figure for low RPM?

Meaning, what does the 150amp alternator with the stock pulley at 1000 RPM puts out vs the small pulley at 1000 rpm.

From what I can tell the test you conducted was only on the high rpm?

 

[Photoman]

Please note FSM says 39 N*m or 29 ft-lbf. NOT 81 !!!!

Read (f) To torque pulley nut..... 81 ft·lbf.