Chain drive a p pump

DISTURBED said:
What are you going to use to keep the chain tight?
Click to expand...

I was thinking I would slot the plate and put and idler pulley on the one side.

On chain speed, my thought was a crotch rocket doing 120+ has a similar sized drive sprocket so it would be way faster. Thought is a gsxr top gear is 1.2 :1. At 10,000 rpms it would be spinning way faster then this. I know it's a smaller chain.
 
Last edited:
lubeowner said:
I was thinking I would slot the plate and put and idler pulley on the one side.
Click to expand...

If you do it this way, put the pulley in a double shear mount. It'll last longer, less likely to vibrate loose and be easier to adjust.
Personally I'd find a idler arm tensioner and adapt a sprocket or a delrin/nylon capturing pulley onto the arm.
 
lubeowner said:
On chain speed, my thought was a crotch rocket doing 120+ has a similar sized drive sprocket so it would be way faster. Thought is a gsxr top gear is 1.2 :1. At 10,000 rpms it would be spinning way faster then this.
Click to expand...

I think my calculations are correct, rear wheel RPM on a bike running 200mph is less than 3K rpm.
 
BigPapa said:
I think my calculations are correct, rear wheel RPM on a bike running 200mph is less than 3K rpm.
Click to expand...

At 150 its 2018 rpm
At 200 its 2691



150mph x 5280 / 60min= 13200

13200/ 6.54= 2018 rpm


A tire 25" tall x 3.14=78.5/12"=6.54
6.54 is tire roll out




https://answers.yahoo.com/question/index?qid=20081208100900AAv6YVx




Im pretty sure there is a vid of a drag bike on here with a gopro on the chain and its damn scary what the chain goes through at those speeds.
 
Last edited:
DISTURBED said:
Im pretty sure there is a vid of a drag bike on here with a gopro on the chain and its damn scary what the chain goes through at those speeds.
Click to expand...
I was just about to go find that video. There is also one off a belt drive bike and was much less scary

phone
 
Chains are definitely not intended for high speed applications... They are used for high torque low speed applications. Such as in the combine header application. Less risk of belt slip and fire.
 
With all this said. BMW does use chains on most all their engines to run the over head cams. On the v8's with dual over head cams they run 2 chains with a oil controlled tensioner. This tensioner setup is on all the engines V8 and I6 and they see rpm's up to 9k in race applications. The issue I see is being able to control the chain with a strong enough tensioner, keep it cool and lubed
 
DISTURBED said:
With all this said. BMW does use chains on most all their engines to run the over head cams. On the v8's with dual over head cams they run 2 chains with a oil controlled tensioner. This tensioner setup is on all the engines V8 and I6 and they see rpm's up to 9k in race applications. The issue I see is being able to control the chain with a strong enough tensioner, keep it cool and lubed
Click to expand...

There is a difference in this chain its not a roller chain. Its called silent or link chain. The teeth on the sprockets look like gear teeth. Much stronger chain and quiter.


I still think the best route to go would be a belt set-up. Dont have to worry about lubing the chain and stretch on a belt is alot less.

Think of all the harley and other bikes with 100cuin motors running belt drive. They get 40k before the belt needs to be replaced.
 
turbom700 said:
There is a difference in this chain its not a roller chain. Its called silent or link chain. The teeth on the sprockets look like gear teeth. Much stronger chain and quiter.


I still think the best route to go would be a belt set-up. Dont have to worry about lubing the chain and stretch on a belt is alot less.

Think of all the harley and other bikes with 100cuin motors running belt drive. They get 40k before the belt needs to be replaced.
Click to expand...

http://www.bentleypublishers.com/bmw/repair-information/bmw-3-series-e36-1992-1998-repair-manual/gallery-1027-7.html

Teeth look normal just a double sprocket
 
turbom700 said:
There is a difference in this chain its not a roller chain. Its called silent or link chain. The teeth on the sprockets look like gear teeth. Much stronger chain and quiter.


I still think the best route to go would be a belt set-up. Dont have to worry about lubing the chain and stretch on a belt is alot less.

Think of all the harley and other bikes with 100cuin motors running belt drive. They get 40k before the belt needs to be replaced.
Click to expand...

This^^^


Roller chain is nothing like the chains used in engines for timing. Not to mention the fact timing chains in high RPM engines have some sort of self adjusting tensioner. Look at a basic dirt bike engine. They use a specialty silent chain and typically use a self adjusting spring type tensioner that keeps the chain in constant tension.

One side note is what kind of havoc will the lateral loads of a chain or belt cause on the pump itself?
 
BigPapa said:
Correct.

I don't see strength of a 530 chain being an issue. If it'll hold up on a bike with over 100hp it will be fine for your application. If you go chain, I would suggest a good, sealed, X-ring chain.

The issue I see is keeping the chain lubed. It's going to be dirty. A belt would offer the same strength, no stretch, and be much cleaner. I know your not worried about noise, but it would also be quieter.

My $.02
Click to expand...

You could just point the draft tubes at the chain for lube. It would be on demand chain lube.
 
Last edited:
Its on the slack side of the chain so it shouldnt pull against the tensioner. I would be worried about the hard chain on the steel roller but heck if the guys going to run an open roller chain with a mechincal pump mounted with a flame cut peice of scrap steel. Why not run a 20 dollar tensioner.
 
turbom700 said:
Its on the slack side of the chain so it shouldnt pull against the tensioner. I would be worried about the hard chain on the steel roller but heck if the guys going to run an open roller chain with a mechincal pump mounted with a flame cut peice of scrap steel. Why not run a 20 dollar tensioner.
Click to expand...


LOL

Yes I struggle with not using a belt.
 
You must log in or register to reply here.
Back
Top