RMC No. 15 lives in Darwin

[justcobra]

Thanks for the photos as my RMC AC Cobra did not come with a chassis
It is a basket case!.
My RMC started with a body less the hang on's and I am trying to configure how the chassis looks like.
From all accounts my RMC is a Series 1 which has as single stacker chassis as shown from the earlier photographs in this forum.
The chassis rails past the bulk head has to be straight!
The RMC chassis has similiar features to ERA and others.
The bends in the front section where the engine is situated is of particuliar interest as the photographs that I have in possession is not clear.
As shown in the powder coated chassis (it is assumed) that a LS1 had to be fitted lower into the chassis rails or else it would hit the bonnet.
Alot of cutting and shaping of the RHS had to be done!

Here is a intelligent question for you BAZ?

How much did the chassis stick past the sill?

When I scaled my pictures I get around 100mm.

This looks weird perhaps to cater for the side exhaust.

[Rebel1]

We chatted today on the phone.
One thing that came to mind after our phone call was the question as to whether your body is actually a series 1 or series 2.

The external body is actually the same between the two. The only thing that changed was the inner fiberglass tub.

The series 1 tub had only a small moulded recess for the single side chassis rail where as the series 2 had to cover the twin rails.

The twin rails when measured in the foot well area were about 240mm top to bottom. That means the inner tub had to have a deeper moulding to cover those side rails.

The fiberglass tub at that same point, measured 220mm deep to cover the side rails. Hense the approx 20-25mm of exposed chassis below the sill.

So measure the side of the inner tub moulding about half way between the door opening and the front of the footbox and if it measures about 220 mm then it is for a series 2 chassis.

[justcobra]

Originally Posted by Rebel1

We chatted today on the phone.
One thing that came to mind after our phone call was the question as to whether your body is actually a series 1 or series 2.

The external body is actually the same between the two. The only thing that changed was the inner fiberglass tub.

The series 1 tub had only a small moulded recess for the single side chassis rail where as the series 2 had to cover the twin rails.

The twin rails when measured in the foot well area were about 240mm top to bottom. That means the inner tub had to have a deeper moulding to cover those side rails.

The fiberglass tub at that same point, measured 220mm deep to cover the side rails. Hense the approx 20-25mm of exposed chassis below the sill.

So measure the side of the inner tub moulding about half way between the door opening and the front of the footbox and if it measures about 220 mm then it is for a series 2 chassis.

Thanks for the intelligent discussion that I had with you this afternoon and now I believe that my RMC is a Series 2.

As you had indicated that the top stacker is a 50 x 50mm RHS and the bottom stacker is a 75 x50mm RHS configuration with a 25 mm overhang

Now if I measure from the top stacker to the lowest portion of the return in the sill I will come with the 220mm as mentioned..

In fact it is 223mm.

[Rebel1]

Then you will have to build a series 2 chassis a bit like Baz's but without the engine mount mods Baz had built to take the LS engine. Or a hybrid of the two.

The weight of the body is taken by the inner chassis rail alongside the tunnel, the flanges on the front inner guards bolt to the top rail and the rear of the body , inside the boot has two bolts each side which bolt to the rear chassis extension.

The under dash hoop also supports the body via three bolts into the hoop itself at the firewall inside the engine compartment and two bolts through the base of the under dash hoop into the top side rail on each side.

Hope I have described that so it can be understood.

[justcobra]

Thanks for the information.

At least you got my six photos and now we can communicate outside this forum if needed and it is confirmed that my RMC is a Series 2.


Construction of the chassis will be based on Baz's photographs with perhaps the exception of the modification performed to accommodate the LS1 which from all accounts was a torrid and expensive affair.

I will keep my lower stacker in line/pararel with the bottom edge of the sill avoiding th unsitely 25mm. overhang.

To avoid that problem I will take up the suggestion to modify the engine mounts ilo the chassis if a Corvette engine is to be fitted.

Fitting side pipes is perhaps period correct but is complex when it comes to Series 2 RMC. .

Fitting as standard underneath exhaust is perhaps the only to go to meet our engineering requirements and maintain reliability in engine management and performance,