MX5 Sump... mad idea?

[CTWV50]

So now my build is nearly over, my mind has inadvertently been thinking of other matters/puzzles. I never liked how much the MX5 sump hangs down. I've no doubt it'll take a good solid whack or two to damage it but still. A sump guard only makes grounding out issues worse, I've found. So.... I thought about chopping sumps (it's cast alloy), dry sumps (stupid expensive). And then thought, "hang on, what's the mazda 1.6 323 sump made from?".

http://www.ebay.co.uk/itm/ADM561201-...em462464 fbe3

Steel! So chop one of them instead and fit that? Anyone see any issues with this, other than it won't bolt up to the gearbox?

This is a post IVA thing btw.

[skov]

It's a crazy idea, but it might just work!

I've been scraping my sump fairly regularly recently
I think my suspension must have softened over time as it never used to hit the ground.
One of my winter jobs is to come up with some kind of guard. Or possibly just raise the ride height if I'm feeling lazy
I'll be interested to hear if this idea works though!

[johnl63]

been thinking on those lines this morning
check out
http://forum.wscc.co.uk/forum/index....ur-sump/page-2

[PorkChop]

There should be no problem with welding the ali sump; it's been done before.

But IIRC the later 1.6 90bhp sump is steel.

[CTWV50]

Originally Posted by PorkChop

There should be no problem with welding the ali sump; it's been done before.

But IIRC the later 1.6 90bhp sump is steel.

No it's Ali. I have a 95 1.6 90hp. Apparently cast Ali is difficult to weld.

[CTWV50]

Originally Posted by skov

It's a crazy idea, but it might just work!

I've been scraping my sump fairly regularly recently
I think my suspension must have softened over time as it never used to hit the ground.
One of my winter jobs is to come up with some kind of guard. Or possibly just raise the ride height if I'm feeling lazy
I'll be interested to hear if this idea works though!

My main concern is losing 4 of the 8 bolts that hold the engine to the gearbox!

[CTWV50]

Sump looks very strong/structural don't you think?

[TalonMotorFabrication]

Originally Posted by CTWV50

Sump looks very strong/structural don't you think?

I think you are correct in saying that it 'was' structural as you need to remember how the back of the gearbox was tied to the nose of the diff, if there was only four bolts around the top of the gearbox the diff could have snapped the bell housing under load.
How ever in the Roadster you support the back of the gearbox on it's own rubber mount in the tunnel, it does not have the diff acting on it you could in theory get rid of the bottom section.
There is a 200sx in the unit next to me making near 280hp and that has only ever had four bolts holding it together and that is used for drifting. I personally would spend the £25-60 that the steel item costs on paying some one to TIG the cast ali item once I'd worked out the sump oil pickup.

[CTWV50]

Originally Posted by TalonMotorFabrication

I think you are correct in saying that it 'was' structural as you need to remember how the back of the gearbox was tied to the nose of the diff, if there was only four bolts around the top of the gearbox the diff could have snapped the bell housing under load.
How ever in the Roadster you support the back of the gearbox on it's own rubber mount in the tunnel, it does not have the diff acting on it you could in theory get rid of the bottom section.
There is a 200sx in the unit next to me making near 280hp and that has only ever had four bolts holding it together and that is used for drifting. I personally would spend the £25-60 that the steel item costs on paying some one to TIG the cast ali item once I'd worked out the sump oil pickup.

Oh really, that's interesting. Looks like something worth trying then. Cheers

[PorkChop]

Originally Posted by CTWV50

No it's Ali. I have a 95 1.6 90hp. Apparently cast Ali is difficult to weld.

You're right, my apologies, got confused with another Mazda engine.