Thread: Grey Motor Conversion.

Originally Posted by mick88

Who made the Holden grey motor conversions for Series one Land Rovers? I assume there were a few conversions available back in the day!


Cheers, Mick.

Grey motor is the same bell housing bolt pattern as the red motor , The only difference is the grey motor did not have side engine mounts it had a front mount under the timing cover and relied on the b/housing for support.

But why would you want a 3 main bearing inferior 6 cyl motor

4 main bearings, not 3.

Jeff

Dellow Conversions ?

About | Dellow Conversions


Colin

Originally Posted by Jeff

4 main bearings, not 3.

Jeff

I stand corrected , But still not a strong set up by any means for a six

Actually I don't believe Dellow were around when people were doing the original grey motor conversions. Johnson's of Geelong were pretty much the original commercial manufacturer.

The Johnson's manual is in the files section. http://www.aulro.com/afvb/local_link...id=7&linkid=53

Originally Posted by rangieman

I stand corrected , But still not a strong set up by any means for a six

But quite adequate for a low stressed, low compression engine such as this, with a design going back to the Chevrolet engine introduced about 1920.

Automotive engines rarely had more than one main bearing every two throws until the 1970s - standard Landrover engines did not get a main bearing every throw until about 1980.

There are other shortcomings of the Grey motor much more significant than this!

John

Originally Posted by JDNSW

But quite adequate for a low stressed, low compression engine such as this, with a design going back to the Chevrolet engine introduced about 1920.

Automotive engines rarely had more than one main bearing every two throws until the 1970s - standard Landrover engines did not get a main bearing every throw until about 1980.

There are other shortcomings of the Grey motor much more significant than this!

John

Dont get me started . I cant stand the grey or red would not be worthy of a boat anchor

Originally Posted by JDNSW

But quite adequate for a low stressed, low compression engine such as this, with a design going back to the Chevrolet engine introduced about 1920.

Automotive engines rarely had more than one main bearing every two throws until the 1970s - standard Landrover engines did not get a main bearing every throw until about 1980.

There are other shortcomings of the Grey motor much more significant than this!

John

It gave illustrious service in many forms of motor sport when properly prepared. Fitting steel main bearing caps or steel strongbacks to the existing caps and the little engine would turn a reliable 7000 rpm plus. Most other shortcomings were in the breathing. The head was a motley arrangement of ports, three inlet and four exhaust. 200 hp on methanol blend was possible with Phil Irving's Repco Highpower head. With ongoing development over two decades Bill Kelly's Q7 speedway midget equalled this figure with a GM-H head but then Kelly is an exceptional talent.