how do YOU rev to 9K RPM?????

[Tigchamp]

Hey Guys,
Where can I get the uprated pump gears from. BTW Ben from Eurospec in the UK has run his Drag 3000GT @ 8600 for two seasons.
Jeff

[TurboSinceBirth]

Boostaddict had some but I'm not sure if Wayne has anymore in stock. Itallo also made some of the gears but I don't know if he has any left either. I'm sure someone will need to make a batch. I have Itallo's billet oil pump gear but either would work well.

[J_Parker]

I suppose I'll chime in I'm not too savvy on all this, but just from a thought of simplicity here... I'm thinking you guys running in the 9k range RPM's are having prolems with it due to too large of bearing gaps and improperly balanced rotational masses.

If you're running a high RPM setup, that's going to give the cranks flex more intertia if the crank/bearing spacing is large enough, hence beating the shit out of the bearing. Afterall our pistons at an RMP of 9K are moving at ~10,000 feet per minute, the end of the stroke is the stopping force of the that piston. If it's imprperly balanced the piston offsetting the stroke of the oposite is going to either be too heavy or too light, think about if you were to weld a quarter onto one of your rods, that would be an exteme case of a shitty balance, but it gives you a better idea of what I'm trying to get at. (I can think about whats happening, but I suck at wording it)

I would suggest a hardened crank, a good balance and a very intolerable bearing clearance.