SuzukiSavage.com - Oil Pump Options

DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #15 - 03/29/23 at 18:58:46 Then cut through all the spokes.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #16 - 03/29/23 at 18:59:20 Fabricate a hub with a precise bore for the clutch basket and an accurate & concentric fit for the gear.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #17 - 03/29/23 at 19:00:09 Broach the keyway.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #18 - 03/29/23 at 19:01:02 Attach the gear to the hub.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #19 - 03/29/23 at 19:01:47 Whew! Still more to do. Gotta set up the 30-tooth driven gear. Lob off the boss and clean up the face. It’s like .001” to .002” cuts. Takes forever and wrecks your tools.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #20 - 03/29/23 at 19:02:27 Fabricate a hub with a tight, concentric fit & bore. Set up a drive pin and keyway.
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DragBikeMike Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 4401 Honolulu	Re: Oil Pump Options Reply #21 - 03/29/23 at 19:03:01 Attach the gear to the hub.
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DragBikeMike

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Re: Oil Pump Options
Reply #22 - 03/29/23 at 19:04:04

The hi-speed gears came out good. They fit snug, turn smooth, and the backlash is uniform 360° around.

So, with a hi-volume pump and a hi-speed gearset I have options. I can run the pump alone, or the gearset alone, or marry them up. I should have more than enough capacity. Still have to worry about suction lift. The stock pump bellmouth may not be able to handle the flow, which could result in the pump losing suction. I’m not sure what will happen when this thing really gets cookin. Best stick with synthetic oil which has a higher flash point, and use 10W-40 rather than my go-to 20W-50 (at least until I see how things shake out).

I modified a suction strainer. Don’t wanna use it unless I’m forced to. I want to see if the hi-speed gears will work OK with a stock pump assembly. It will be nice to know that you could simply install the gearset without worry. Essentially no need to tear open the crankcase. There isn’t enough material to open up the bellmouth either. It narrows down the closer it gets to the gerotor. I suspect that if suction lift is a problem, it will rear it’s ugly head up in the bellmouth passage.

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DragBikeMike

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Re: Oil Pump Options
Reply #23 - 03/29/23 at 19:05:01

Also, must be concerned about wall thickness on the pump housing. After the machining, it’s just a little over 3mm thick. If the hydraulic loads are great enough, it could blow out the left side of the pump. If I get to a point where I install the high-volume pump, I will probably drill out the oil discharge passage in the right side engine case to increase the cross section by about 30%. That should help reduce pressure (assuming the filter can support the flow).

The SV pumps also utilize an unloader valve. I bought two pump assemblies off eBay. I made sure to get the unloader along with the pump. Still must check the unloader to see where it lifts, along with the bypass relief in the oil filter. That’s info I need to capture.

This is the SV unloader. It takes about 3 pounds of force to move the valve, and looks like the valve seating area is about .31” diameter. Doesn’t look like it would require much pressure to start the lift, but it does look like it would be easy to make it adjustable. Looks can be deceiving.

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DragBikeMike

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Re: Oil Pump Options
Reply #24 - 03/29/23 at 19:05:56

So, now it’s time to yank the engine out and see where all the metal chips are coming from. As I previously mentioned, endoscope inspection does not reveal any gears with pits. I have no idea where the debris is coming from. The only thing I know for sure is it can’t be good.

As Armen says, “You find your limits by exceeding them.”.

More to come.

Mike

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Armen Serious Thumper Offline Half-Witted Wrench-Jockey from Jersey Posts: 1452	Re: Oil Pump Options Reply #25 - 03/29/23 at 20:13:58 Awesome work and write-up! Thanks! As you pursue the world’s first 90HP Savage!
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Ruttly Serious Thumper Offline Thumpers Rule Posts: 5106 Manteca , CA Gender:	Re: Oil Pump Options Reply #26 - 03/29/23 at 20:35:12 Our only limits are ones we set for ourselves We accel when fear becomes curiosity 2 cent
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Oil Pump Options Reply #27 - 04/13/23 at 23:43:51 You missed some letters.. We accel when fear becomes curiosity We accelerate when fear becomes curiosity. We accelerate to the emergency room.
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zevenenergie Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1389 The Netherlands Den Haag	Re: Oil Pump Options Reply #28 - 09/25/23 at 03:56:49 Wow a compete how to... And some nice sayings as dessert
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