Roadster swb MGB engine and gearbox help

[marlin1984]

Re: Roadster swb MGB engine and gearbox help

Good morning all,

Please can I place a request to any owners of a marlin roadster that has an mgb engine and gearbox in it?

I'm in the early process of a build where I would like to fit and mgb engine and gearbox in my swb hybrid roadster.

I would highly appreciate it if any owners out there could send me some photos of the engine position, mount position, box tunnel and clearance etc. I'm struggling to imagine how it's going to sit...

Even better if anyone wouldn't mind, I'd love you see one in-person, if anyone would allow me to see theirs I would highly appreciate it! I'm Gloucester based for reference.

Thanks alot!

Sam

Hi Sam
Gloucestershire is my old stamping ground. I'd be very surprised if there isn't someone with a suitable Marlin in the Stroud & District Motor Club [at their last trial I was told about 12 Marlins were there …] Might be worth joining and asking ?

ATB
(ref. mechanical fans. My Mk2 had a standard-looking B engine with standard mechanical fan. BUT it was so far away from the core as to be useless/just absorbing bhp to drive it/stirring engine bay heat ! [now removed and I will rely on an electric fan in front of rad. - fingers crossed!)

Ideally a mechanical fan without a shroud should be 1/2" to 3/4" from the core [to allow for engine movement under braking. Impossible on Marina-suspended Mk 2 because of the rack].

Reminds me - I must also block the big gaps around the Marlin rad. to ensure all airflow goes through the core.

"ITV" is that a typo for IVA? ITV is a tv station.

[stevejgreen]

Re: Roadster swb MGB engine and gearbox help

Presumably you are confident of passing an ITV, otherwise the additional work may be to no avail.

If you have a Hybrid chassis with the mountings for a B series engine (identical to a Marina) then use them, it’s about as far forward as the engine can go with a mechanical fan in front.
From that point on, the challenge is principally transmission tunnel dimensions, which will impinge on footwell space, and the installation of an MGB clutch master cylinder, and suitable support for the gearbox, for which I have never seen a drawing.

There are other minor considerations like a remote electric fuel pump, which must be considered, especially in the case of an accident, you don’t want the fuel pump running, if you are incapacitated and can’t turn the ignition off, another ITV requirement.

A browse through Tech Tips in the Members Only section should reveal more clues.

Good luck!

I have no definitive pictures so cannot help there, but I would be equally curious to see them too.

[sparker1994]

Good morning all,

Please can I place a request to any owners of a marlin roadster that has an mgb engine and gearbox in it?

I'm in the early process of a build where I would like to fit and mgb engine and gearbox in my swb hybrid roadster.

I would highly appreciate it if any owners out there could send me some photos of the engine position, mount position, box tunnel and clearance etc. I'm struggling to imagine how it's going to sit...

Even better if anyone wouldn't mind, I'd love you see one in-person, if anyone would allow me to see theirs I would highly appreciate it! I'm Gloucester based for reference.

Thanks alot!

Sam