minimum clearence to sump for road car?

[mnrvortxf20c]

how low would you guys go with sump for road use? i was thinking around 75mm?
i have just purchased a 2007 hayabusa engine, and will be probably using the sbd dry sump setup. i obviously want it as low as possible but without the risk of any damage. cheers!

[Huff]

Not quite the same, but I have a Fisher Fury with a bike engine (R1). Clearance as current set-up is about 70mm.

This low you *must* pay attention to every damn thing on the road ahead and plan for it. Speed bumps / pillows will have you wincing; such low static clearance means you are really depending on your spring rates for many things, since the slightest bump and flex reduces that clearance significantly.

And realistically that can mean that anywhere the road crowns (- even up-ramps steep than about 1:12 with sharp transition onto a different level e.g car parks) can cause a slight grind. 75mm works with modest care, but no lower for a road car I think.

Edited by Huff on Sunday 16th September 02:17

[mnrvortxf20c]

thanks huff. i was thinking somewhere near 75mm myself. cheers

[jas7]

I used to run 65mm - bit too low sometimes - so 75mm sounds about right. I have also moved the mounts up slightly so i can run lower at the front.

[Noger]

75mm with you in it is about as low as you want to go.

Is the Busa engine tall compared to it's baby brother ?

The DS will help, but try to raise it up in the chassis as much as you can. You then get problems with under bonnet clearance but there are options there. Poke it up through, or you can turn the TBs through about 60 degrees and have them hozizontal.

[CanAm]

A quick method of measuring sump height is to try to roll a can of coke and a wine bottle underneath. If the coke can fits and the wine bottle doesn't then it's about right.

[MKnight702]

I wish I had 65mm ground clearance.

My Eleven has 50mm without me in (coz I'm the one measuring!), too low really given the standard of roads at the moment, I can ground out just hitting a bad rut. I really must get around to raising the ride height.

[mnrvortxf20c]

engine is quite tall compared to the k series but with the shallow sump its not to bad really. i dont have a great deal of clearence at the moment so will aim for at least as much with the busa.
the only problem ive realised is that my stack 8100 dash doesent read rpm high enough for the busa which revs past 11,000 rpm.