[pic] Name that T/F engine part (1 Viewer)

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found it browsing eBay, here is the description:

Up for auction is a race used top fuel engine part given to me by a Schumacher crew member and signed by Tony. The only real mystery is I dont know from what part of the engine it came from. It has small marks all around it and what looks like timing type marks so I think it is from blower belt drive or front of the engine. I may be wrong but will guarentee it is from a Tony Schumacher 8000 horsepower engine and that he signed it.

I'm just curious what it is and what it does.

 

[funnycarguy]

It fits on a RCD front hub. If you look carefully you can see 4 small triangles which are the magnets for the crank trigger

 

[Nitrohaulic]

To be used with a center flange pulley.

 

[Ponyhntr]

It's the timing/crank trigger ring. As said before, it goes on an RCD front hub. No special pulleys needed.

 

[.]

Ah, I see. So, it sandwiches in between the hub and the pulley?
Do any bolts go thru it or some other way of fixing into place?

Thanx guys.

 

[Ponyhntr]

It has a slight press fit onto the hub. The blower pulley then bolts to the hub which effectively sandwiches the ring on to where it can't come off.

 

[tnitro2]

Bingo!!! Joshua is your winner. It contains the flying magnets that fire the crank triggers, and if you could see the outer ring of it, it has a the timing marks that allow the crew chief to see the initial timing and the engine builder to set TDC and degree in the camshaft. Nifty little piece huh?