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Lotus 7 Project Arrived


ianashdown

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Can anyone let me know if 105E and 120E heads are interchangeable, similar or not alike in any way?

 

Also, can a 105E block be bored to 83.5mm dia?

 

Thanks,

 

Ian

 

 

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Similar and generally interchangeable, but some significant differences.  The biggest difference is the 105e is a 3 bearing block and the 120e (116e) is a 5 bearing, so preferable.

 

The old Dave Bean catalogue has some great information on engine blocks, if you have one.  Some of that may be online now.  There are also some good online resources for Kent Ford engines - google that and Cortina and formula Ford as I recall.

 

The following link is to a thread that includes an unpublished book by an enthusiast.  A phenomenal resource.

 

https://lotuselan.net/forums/viewtopic.php?f=39&t=52339

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Can anyone confirm that a Twin Cam will fit under the Hood/Nose on a Series 2 Seven or not?

 

My 105E block is damaged beyond economic repair and I’m trying to make a decision between building a mildly tuned 120E or possibly a Twin Cam, which would make the Seven quite exciting even in near standard tune.

 

Thank you,

 

Ian

San Clemente, CA

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52 minutes ago, ianashdown said:

Can anyone confirm that a Twin Cam will fit under the Hood/Nose on a Series 2 Seven or not?

 

My 105E block is damaged beyond economic repair and I’m trying to make a decision between building a mildly tuned 120E or possibly a Twin Cam, which would make the Seven quite exciting even in near standard tune.

 

Thank you,

 

Ian

San Clemente, CA

A modern twin cam of some sort might make more sense than a Lotus Twin Cam.  

 

I'm wondering if a ford Zetec will fit in my 1700 Super Sprint, since I already bought one out of a Birkin.

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I expect the twin cam head would clear an S2.

The pinto, lima, and cvh are similar in height to the xflow. Zetec and duratec are very close to each other in height. Toyota 4age, 22r, and Dodge slant six (too long) are in between the two ford groups.

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Posted (edited)

I don't know if this will help, but...

https://www.anglocanadianlotus7.ca/the-first-official-twin-cam-engined-seven-in-1965/

 

The twincam fits just fine in my S-3.  I'm Altadena if you want to come up and look and/or take some measurements.

 

A modern engine would be just fine but it wouldn't make the swell sound that comes from the twincam...

 

Tom

Edited by toldfield
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Tony Ingram (lotus7.com) or Mike Ostrov would be the folks I'd contact - if anyone has done it I suspect they'd be aware.  

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