Motor Swaps

admin · Site Admin Joined: 06 Sep 2007 Posts: 6

Here's the link http://www.elisetalk.com/forums/showthread.php?t=32022

niall · Joined: 06 Sep 2007 Posts: 153

I have got to give the guy credit for alot of machine work and fabrication which has been done to a high standard and i am not one to bag out someon else's work but ........

I thought i had better point out that how the guy mounted his engine in this link is an example of how not to do it. engine mounts should never be solid , always should be rubber or polyeurethane. But more importantly engine mounts should never be welded of bolted to the frame rails/chassis legs of a monocoque design vehicle.
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niall · Joined: 06 Sep 2007 Posts: 153

It is also worth noting the extensive fabrication involved in modifying an rb26 to suit a 2wd application , also major firewall modifications as seen in the link are not legal her in queensland and possibly all of Australia
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SilverBullet · Joined: 19 Nov 2007 Posts: 10 Location: Brisvegas

Why do u say that the mounts should not be welded to the rails?
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SilverBullet

niall · Joined: 06 Sep 2007 Posts: 153

there are a few reason.

the frame rails in a monocoque design vehicl are not very strong, well the actual walls of the rail arent. the metal he welded to is only about 1mm thick, so the welds can tear out real easy.

Welding can create a high stress area which is prone to fracturing and breaking

Also an engine should always be mounted to the subframe, it i sdesigned to take the load and spread it out evenly through the frame of the vehicle, welding 2 brackets to the rails concentrates all the weight of the engine into 2 points where it is not designed to take it.

In this case the guy is going to an engine and drivetrain that is probably more than twice the weight of the engine designed for the car, combine that with over 400hp welded to the front rails, that is a recepie for disaster

The only time mounts can be welded to the frame rails is on a vehicle with a full length chassis, like early fords, range rovers etc.
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SilverBullet · Joined: 19 Nov 2007 Posts: 10 Location: Brisvegas

Those mounts are so far forward. Id love to see some mounts made up for it to fit the subframe. Id imagin modified subframe would be required or some extra beefy trany mounts. I wasnt keen on the ones he had fab'd up.
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SilverBullet

niall · Joined: 06 Sep 2007 Posts: 153

as far as i know the engine mounting points on the block are the same as the rb20. so it would be possible to do something similar to what i did
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190emerc · Joined: 24 Oct 2007 Posts: 4