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[chrisgixer]

I have removed the spring from the strut and re fitted it all with the rack connected, but not mounted.

Then with a pry bar under the wishbone, in the wishbone hole, levered the suspension up to full compression.

With the rack in the current position, the rack is pulled over by about an inch.

[aaronjb]

OK, yep, that sounds like it would be rather excessive bump steer!

What does the stock LS oil pan look like?  I know you mentioned it would remove webbing but I can't quite picture that in my head (or by Google image search as there are so many aftermarket pans out there it's hard to know what was original!)..

[chrisgixer]

Lump is from a Holden vt r8 club sport.

[aaronjb]

Gotcha.. If you're open to spending money to fix it, then, it looks like there are significantly shallower front-sump pans available out there..

Some are essentially flat with only a 7" front sump, rather than the Holden's 10" front sump and angled rear: http://www.s10forum.com/forum/f213/ls-engine-oil-pans-all-of-them-324366/

Assuming it's the webbed part that's in the way of course, and going from ~4" depth to ~2" depth gives you the clearance you need..

[chrisgixer]

Did wonder about removing the sump, see what actually in there.

[aaronjb]

At that end you'll probably find not a lot, just whatever clearance the big ends need..

The oil pump is front mounted so there'll be a short pickup pipe down into the main sump and the rest of it is really only there to drain the oil back down again.

Bit like this:


That's why there's pans like this:



(OK so the Canton pan requires a remote oil filter mounting, but you get the idea)

[05omegav6]

You could space the subframe down 20mm and space the engine up 20mm. This might also help with the exhaust...

Bonnet clearance is easily rectified.

Also don't worry too much about the sump to gearbox bolts... The earlier 4L.. transmission doesn't bolt to the sump at all, so is only held on by six bolts to the block and the bottom of the torque converter and drive plate is covered by a crescent of sheet steel

But, as covered by the project books, the sumps are readily available to suit any application

[chrisgixer]

The problem is the transmission tunnel. There's still room to lift the engine before the bonnet is in the way.... Just.

[05omegav6]

The problem is the transmission tunnel. There's still room to lift the engine before the bonnet is in the way.... Just.

Ok, so notch the casting fins and drop the subframe slightly... if you drop the subframe by an amount, and space the engine up by the same amount, then the engine/gearbox position relative to the body won't change

If you can gain 40mm by notching those fins, then you only need to space 10mm to get your 50mm clearance...

[chrisgixer]

The problem is the transmission tunnel. There's still room to lift the engine before the bonnet is in the way.... Just.

Ok, so notch the casting fins and drop the subframe slightly... if you drop the subframe by an amount, and space the engine up by the same amount, then the engine/gearbox position relative to the body won't change

If you can gain 40mm by notching those fins, then you only need to space 10mm to get your 50mm clearance...

Sadly it's not just the fins. And lowering the subframe will alter the wishbone angle and roll centre. Although I had considered that. It will give more chance of a squat purely through lateral g. the potential for which is much improved of late.

As it is now, the rack is on the flat of the sump. A modified sump will help, but measurements suggest not enough. Remember this is a handling project as well. Not just get the lump in any old how project. If it was I'd revert to a box (spit)


Further. If a "cranked" rack could be made to work, it would be of use on the v6 as well. There certainly there is no way a stock rack will work with a v engine.

[tunnie]

How did the LS1 5.7 that was almost fitted from factory, slot in? Do we know? 

[chrisgixer]

How did the LS1 5.7 that was almost fitted from factory, slot in? Do we know? 

With a steering box and massively compromised headers. IMO.

We have established the ls1 will fit with an auto, manual t56 probably requires a modded tunnel.

[chrisgixer]

I'm also befuddled by the fact the car the lump came out of had a rack too. Hence the shape of the sump.

Holden vt r8 club sport. (Not a commadore/monaro)

[05omegav6]

To answer your last first Commodore has a totally different subframe design any mileage in adapting the Commodore subframe to fit (Ignoring the deficiencies of the Holden set up... options exist for dealing with them anyway)

Any geometry variation caused by the flattening of the wishbones could be adjusted out at the strut, possibly with longer bumpstops to prevent the shocks from bottoming out...

[Kevin Wood]

I would say you could lose most of the rear of the sump without any adverse effects as long as the rack doesn't want to traverse any moving parts in there.

Yes, there's a little bracing of the bellhousing, but the top half of the bellhousing is bolted straight to the block so it's no going anywhere.

A good section of the lower bellhousing on my roller skate has been ground off because speed bumps would have done so otherwise.

The 502CI chevys at the gliding club winches (450+ BHP into an autobox and a shitload of torque) only have a bellhousing over the top half of the torque converter and nothing at all between sump and gearbox at the bottom.