OK, which of you machinists want to help an idiot (me) out with making a small special part?

[Shlbyntro]

I need this pulley with an extra set of 4 grooves added to the front (small divider in between) to drive a 2nd 4pk belt in front of the stock 6pk belt.

Rear View

Side View with back facing upward

Front View

 

[lbhsbz]

I'm not sure that's a good idea with a pressed on pulley...putting a load that far off the shaft may end up wearing out the press fit....maybe.

 

[4Waters]

What are you trying to do?

 

[monkeyswrench]

I'm not sure that's a good idea with a pressed on pulley...putting a load that far off the shaft may end up wearing out the press fit....maybe.

It could be machined for a deeper center bore, but if pressed on a short shaft, you're right. Things could get interesting. If it were a Bolt on idler, you could double bearing it?

 

[Shlbyntro]

I'm not sure that's a good idea with a pressed on pulley...putting a load that far off the shaft may end up wearing out the press fit....maybe.

it's not a press fit. a nut and lock washer hold it on.

What are you trying to do?

I'm trying to drive an AMR500 Supercharger off the alternator on my Ranger. Its the only way while still being able to retain the air conditioning. The new belt would be loading almost 180° off from the stock belt so total lateral load changes should be negligible.

 

[monkeyswrench]

That's cute!
What about a super coupe alternator pulley? weren't they like that?

 

[Shlbyntro]

That's cute!
What about a super coupe alternator pulley? weren't they like that?

8 groove unfortunately. good idea, I just went and looked

 

[4Waters]

Can you get a longer belt and add a idler pulley to change directions?

 

[Shlbyntro]

Can you get a longer belt and add a idler pulley to change directions?

That was my initial plan but not enough room. I would need at least 2 idlers and either the supercharger, the alternator, or both would be in the way of any bracket I would need to make to support the idler. As it is, I am already going to have to relocate the coil packs

 

[lbhsbz]

I would probably modify something like this: https://www.mcmaster.com/products/serpentine-pulleys/v-belt-type~banded/

It's a 16 groove, so you could run a 6 PK and 4 PK off it with some adjustability as to spacing between the belts. It would be easy to machine a hub to adapt this to your alternator....machine off what you don't need.

 

[Shlbyntro]

I would probably modify something like this: https://www.mcmaster.com/products/serpentine-pulleys/v-belt-type~banded/

It's a 16 groove, so you could run a 6 PK and 4 PK off it with some adjustability as to spacing between the belts. It would be easy to machine a hub to adapt this to your alternator....machine off what you don't need.

that's more than the supercharger cost

 

[RIVERBORN]

100% my uncle could do it in Phoenix. 1 off parts are expensive though. Cad and what not adds also. If you have 2 pulleys u want together, I could grove, weld, and machine on a lathe? could be an option

 

[Shlbyntro]

100% my uncle could do it in Phoenix. 1 off parts are expensive though. Cad and what not adds also. If you have 2 pulleys u want together, I could grove, weld, and machine on a lathe? could be an option

kind of what I was thinking. can even weld a pair of 6groove pulleys together if the hub was cut out of the outer one and the weld could be cleaned up on a lathe

 

[02HoWaRd26]

Spin it off the driveshaft

 

[LargeOrangeFont]

Just LS swap it.

 

[rivermobster]

The Road Kill guys just used a whole bunch of leaf blowers.

Maybe you could fab up an electric motor to drive it?? Maybe an old washing machine motor? You could use the existing brackets and replace the tub with the super charger!

Mount the whole thing on the hood with a big azz scoup.

It would Definitely be a one off.

 

[Shlbyntro]

Ok, now to find somebody with a lathe

 

[Terminal Velocity]

Ok, now to find somebody with a lathe

Any local high schools with a machine shop? Be a cool project for a kid.

View attachment 1314620

 

[Cobalt232]

Any local high schools with a machine shop? Be a cool project for a kid.

They still have those? Our local high school turned the wood shop into a dance studio...

 

[bonesfab]

They still have those? Our local high school turned the wood shop into a dance studio...

And thats how we are ending up where we are today.

 

[mattyc]

Ok, now to find somebody with a lathe

View attachment 1314620

What do you want to do? I may be able to help

 

[RaceTec]

Ok, now to find somebody with a lathe

Where are you located? If you are near me (Huntington Beach) we could clean it up for ya.

 

[Shlbyntro]

Where are you located? If you are near me (Huntington Beach) we could clean it up for ya.

appreciate the offer but that's a long lunch break from TX. I may still end up mailing it to you tho lol

@mattyc i just need to clean up the welds so they dont tear up the belt or cause it to jump the pulley and then I need to cut the hub out of the front pulley now that it is welded together.

 

[Bigbore500r]

appreciate the offer but that's a long lunch break from TX. I may still end up mailing it to you tho lol

@mattyc i just need to clean up the welds so they dont tear up the belt or cause it to jump the pulley and then I need to cut the hub out of the front pulley now that it is welded together.

Jam a dowl in it or slip a piece of allthread in there with a few washers and nuts. Chuck it up in a drill press on low RPM and massage that weld with a 4" grinder while it rotates.....

Redneck backyard machine shop Freebie!!!!!!!!!!

 

[mash on it]

Jam a dowl in it or slip a piece of allthread in there with a few washers and nuts. Chuck it up in a drill press on low RPM and massage that weld with a 4" grinder while it rotates.....

Redneck backyard machine shop Freebie!!!!!!!!!!

This.
Flapper wheel for the win.

Dan'l

 

[Shlbyntro]

still need the hub cut out tho

 

[4Waters]

still need the hub cut out tho

 

[Bigbore500r]

still need the hub cut out tho

That's what holesaws and for

 

[Bigbore500r]

This.
Flapper wheel for the win.

Dan'l

Dont forget to kiss it with some semi-gloss krylon when its all finished!

 

[Gramps]

Jam a dowl in it or slip a piece of allthread in there with a few washers and nuts. Chuck it up in a drill press on low RPM and massage that weld with a 4" grinder while it rotates.....

Redneck backyard machine shop Freebie!!!!!!!!!!

I like the way he thinks

 

[Bigbore500r]

@Cole Trickle I like where this is going....if it doesn't make enough boost, you can legitimately say "Its probably the alternator"

 

[Shlbyntro]

View attachment 1314656

ya, I'd rather not spend 10hrs to cut a hub out

 

[Shlbyntro]

That's what holesaws and for

View attachment 1314660

How many hole saws to go through 5/16" of rolled steel?? I think I rather just pay somebody to spin it on a lathe real quick. It couldn't take but 15min for somebody who knows what they're doing. or I'm sure I could figure a lathe out, I just need to find one

 

[4Waters]

ya, I'd rather not spend 10hrs to cut a hub out

Local engine machine shop should have a lathe

 

[lbhsbz]

How many hole saws to go through 5/16" of rolled steel?? I think I rather just pay somebody to spin it on a lathe real quick. It couldn't take but 15min for somebody who knows what they're doing. or I'm sure I could figure a lathe out, I just need to find one

just 1. Use cutting oil (oatey dark thread cutting oil from Home Depot in the plumbing section works great). High feed, low speed, clear the chips occasionally....the hole saw might be missing some paint by the time it's done, but otherwise should be like new. That's what hole saws are for.

 

[76sanger]

I thought RD liked to do machining and work like that. Ask him!

 

[mattyc]

appreciate the offer but that's a long lunch break from TX. I may still end up mailing it to you tho lol

@mattyc i just need to clean up the welds so they dont tear up the belt or cause it to jump the pulley and then I need to cut the hub out of the front pulley now that it is welded together.

I can help you out if you dont find someone local and want to ship it. Let me know

 

[wzuber]

Lets get ol' @RD to doit......he aint doin nutin but sitn round lookin busy and crying about diggin post hole signs occaisionally n chit.....lol

 

[SoCalDave]

How many hole saws to go through 5/16" of rolled steel?

One, in less than 60 seconds.

 

[SoCalDave]

Lets get ol' @RD to doit......he aint doin nutin but sitn round lookin busy and crying about diggin post hole signs occaisionally n chit.....lol

I'm bored but 1500 miles away...

 

[rivermobster]

That's what holesaws and for

View attachment 1314660

Don't be silly...

He needs this!

 

[Go-Fly]

Jam a dowl in it or slip a piece of allthread in there with a few washers and nuts. Chuck it up in a drill press on low RPM and massage that weld with a 4" grinder while it rotates.....

Redneck backyard machine shop Freebie!!!!!!!!!!

I've done this. In a shop that had $10m of tools in it.

 

[4Waters]

I've done this. In a shop that had $10m of tools in it.

Me too, but it's all I had

I've tested alternators like this as well

 

[rivermobster]

Me too, but it's all I had

I've tested alternators like this as well

You either had a small azz alternator, or one big azz drill!

 

[4Waters]

You either had a small azz alternator, or one big azz drill!

I changed the belts on the drill press to max speed, had a pulley on all thread and a short belt to connect to the alt.

 

[rivermobster]

I changed the belts on the drill press to max speed, had a pulley on all thread and a short belt to connect to the alt.

Big azz drill, press!

 

[Shlbyntro]

I changed the belts on the drill press to max speed, had a pulley on all thread and a short belt to connect to the alt.

What were the Rpms?

I did some calculations with my setup including with this overdrive pulley I'm making and my supercharger is going redline before the engine does at a final drive ratio of 1:3.65. I figured I should overdrive it being that it is slightly small for a 2.3L. maximum sustained RPMs after install will be 4,500 with a max peak rpm of 5k I'm not sure I'd ever spend much time in that rpm range on this truck anyway.

as for the drill press, I was already having a hard time finding something to hold the pulleys on center when I was welding them (17mm) I ended up using a 7/16 socket with exactly 2 layers of gorilla tape wrapped around it which was fine for just center locating them to throw a couple tacks down but I doubt would stand up to any forces I put on it if I were to put it in a drill press. I would need something with a large chuck to grab the hub from the outside, something like a lathe

 

[4Waters]

What were the Rpms?

I did some calculations with my setup including with this overdrive pulley I'm making and my supercharger is going redline before the engine does at a final drive ratio of 1:3.65. I figured I should overdrive it being that it is slightly small for a 2.3L. maximum sustained RPMs after install will be 4,500 with a max peak rpm of 5k I'm not sure I'd ever spend much time in that rpm range on this truck anyway.

as for the drill press, I was already having a hard time finding something to hold the pulleys on center when I was welding them (17mm) I ended up using a 7/16 socket with exactly 2 layers of gorilla tape wrapped around it which was fine for just center locating them to throw a couple tacks down but I doubt would stand up to the forces of anything if I were to put it in a drill press on it. I would need something with a large chuck to grab the hub from the outside, something like a lathe

Shit, it's been 20 years. I'd have to look at the drill press but I think it was spinning 2000-2500 rpms and I was running the alt 1:1. The alt was working BTW

 

[rivermobster]

What were the Rpms?

I did some calculations with my setup including with this overdrive pulley I'm making and my supercharger is going redline before the engine does at a final drive ratio of 1:3.65. I figured I should overdrive it being that it is slightly small for a 2.3L. maximum sustained RPMs after install will be 4,500 with a max peak rpm of 5k I'm not sure I'd ever spend much time in that rpm range on this truck anyway.

as for the drill press, I was already having a hard time finding something to hold the pulleys on center when I was welding them (17mm) I ended up using a 7/16 socket with exactly 2 layers of gorilla tape wrapped around it which was fine for just center locating them to throw a couple tacks down but I doubt would stand up to any forces I put on it if I were to put it in a drill press. I would need something with a large chuck to grab the hub from the outside, something like a lathe

If you Really wanna do this...

Have someone 3D print you a one piece pulley. Then, when you have it all figured out Properly (pulley size, location and all that) have a machine shop make you a pulley from the CAD drawing.

You could actually be on to something you could sell here??

 

[Shlbyntro]

If you Really wanna do this...

Have someone 3D print you a one piece pulley. Then, when you have it all figured out Properly (pulley size, location and all that) have a machine shop make you a pulley from the CAD drawing.

You could actually be on to something you could sell here??

This is the easy part. the difficult the part is going to be figuring out the mounting of the supercharger. I know I am going to have to relocate the ignition coils and then will have to build mounts with some kind of tensioning adjustment.

how much demand could there really be for superchargers on 30 yr old 4 cylinders??