bigbravedave
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| posted on 27/4/10 at 07:28 AM |
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Can anyone show me their bec sump protector
After a couple of thousand miles in my zx12r engine stuart taylor the (zcars chopped and baffeled) sump is looking like its scraped a few times, as
its only thin ally I would liketo knock up a sump guard, Has anyone got pics of something similar for inspiration
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mangogrooveworkshop
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| posted on 27/4/10 at 08:03 AM |
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I would like to show you but I haven't made it yet
basicly a big ol ali plate with four ears on it and front and back edges turned up.
holesaw to lighten and let the crud out.
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gingerprince
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| posted on 27/4/10 at 08:30 PM |
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This is mine. Fitted after I caught the front of my sump, smashing it, and relocating the engine back a couple of inches!
It's fastened at the front with rivnuts, then slopes downwards and is supported by a rivnutted crossmember just in front of the sump. From there
it's bent level and just provides "scuff" support for the base of the sump - it's not supported at the back.
The idea is that if I hit a speed bump (or - ahem - drive off a kerb too quickly!), the slope will guide me over it without smacking the front.
The use of rivnuts means that in theory they'll "give" first and remove the guard, rather than bending the bits of the chassis
it's attached to! May seem a bit paranoid, but since I've already had to straighten it once I think it's justified 
I haven't decided yet whether it causes any lift at the front due to aero effect - I thought it was on my last track day, but until I do some
consecutive laps with and without it I'm treating it as paranoia.
 
Rescued attachment sumpmarry.jpg
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easisatman
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| posted on 27/4/10 at 09:26 PM |
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Here is a pic of mine.
Similar to Gingerprince
the person that built the car made it after hitting a rock and smashing the sump its rivnutted on at the front and a steel cross section at the back
with the plate rivitted on to this. I have just had to re rivitt it back on after I spun at the circuit de catalunya on a track day over the kerb but
at least it saved the sump
 
Rescued attachment thmb sump sheild.JPG
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JF
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| posted on 27/4/10 at 11:10 PM |
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quote:
Originally posted by gingerprinceI haven't decided yet whether it causes any lift at the front due to aero effect - I thought it
was on my last track day, but until I do some consecutive laps with and without it I'm treating it as paranoia.
Well since it compresses the air between the plate and the ground. And compressed air travels faster, and fast traveling air sucks... In theorie you
should have more downforce instead of lift.
It's used one almost all expensive sportscars and serious racers. It's reconned that on an F1 the underbody delivers more downforce then
those massive wings up top.
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adithorp
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| posted on 28/4/10 at 08:55 PM |
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Are you sure about that...?
The "compressed" air is at a higher presure (hence compressed) and therefore tries to expand and creates lift.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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