dry sump pump belt type

[dwilliams]

Dry sump pumps almost always use toothed belts. Is that just tradition, or is there some non-obvious reason why a V or serpentine belt wouldn't do just as well?

[MadBill]

Because any slippage could mean engine destruction due to inadequate oil pressure. The various profiles of toothed belts either drive at 100% or don't at zero; slippage is not an option. (unless they are ludicrously loose and jumping teeth...)

[dwilliams]

As long as you're within the limits of the belt, slippage should approach zero.

[MadBill]

"Should" is the operative word. A cog belt is pretty much insensitive to tension and going slack with wear, a V or serpentine is a different story. (Now if there was some big upside to the latter, maybe it could be justified...)

[In-Tech]

From my phone, have a look at ford gt40 belt

[In-Tech]

I messed that up, 2005-2006 Ford GT oil pump drive belt is kinda a V cog belt. I couldn't find a better pic, sorry.

113_0311_gt_26_z.jpg

[carmakerevive]

It amazes me that there is some dry sump system providers out there that DO offer with serpentine belts, but they're usually only on 2-3 stage systems that are supplemented by a factory oil pump and oil pan.

3 stages and above - HTD or gilmer is a must as said, for best prevention of massive engine failure... and its funny that even with gilmer/HTD belts - some people STILL over-tension them and wonder why they walk off the pulley...

[Warp Speed]

Some NASCAR teams use serpentine drives. 6 stage pump.

[pamotorman]

there are tension gauges sold to get the proper tension on the gilmer belt.

[carmakerevive]

Some NASCAR teams use serpentine drives. 6 stage pump.

Im surprised and pretty impressed by that. Knowing they've done their research as to belt type/pattern/material and tension. Guess the good thing with modern belts is they're reinforced with kevlar and can be as tight as a drum and not fail.

And the rule i've been tought with toothed belts is to be able to turn the belt 90 degrees with minor resistance.

Still can't say im ready to go and chuck a serpentine belt on my PRC 6 stage though

[swampbuggy]

when i get my engine built it will have a belt drive dry sump oil pump. It will ALSO have a Hobbs switch so if the oil pressure drops below a certain pressure the engine will be deprived of ignition.

[Paul Rig]

as Madbill is saying, veebelts are a non option on drysump especially if it has the pressure stage on the same pump.

[grandsport51]

Simple solution

Ditch the belt LOL!!!

http://barnessystems.com/communities/5/ ... 56x193.jpg

[peejay]

It amazes me that there is some dry sump system providers out there that DO offer with serpentine belts, but they're usually only on 2-3 stage systems that are supplemented by a factory oil pump and oil pan.

A multi rib belt is actually a really good way of transmitting power. i wouldn't discount them, especially if they have a spring loaded tensioner instead of manual tension adjustment.

[MadBill]

Nonetheless, wouldn't be my choice for a cam drive...