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Who is this?
Forum: Classic Lotus
Last Post: dariushbabri
12-10-2017, 09:44 PM
» Replies: 9
» Views: 5,713
Big test for the rollcage
Forum: Racing
Last Post: andredp
11-06-2017, 07:09 AM
» Replies: 19
» Views: 8,642
Carbon Fiber Birkin hood
Forum: Technical
Last Post: 082444Bow
11-01-2017, 11:08 AM
» Replies: 1
» Views: 163
Lotus Twincam motor
Forum: Technical
Last Post: Stuart Donkin
10-23-2017, 03:34 PM
» Replies: 2
» Views: 552
South African Designer
Forum: Classic Lotus
Last Post: Richard Clarke
10-23-2017, 08:58 AM
» Replies: 5
» Views: 2,787
Ford Kent 16000 Thermosta...
Forum: General Discussion
Last Post: jzeller
10-22-2017, 08:12 PM
» Replies: 2
» Views: 1,249
clutch cable
Forum: Technical
Last Post: 082444Bow
09-11-2017, 07:48 AM
» Replies: 0
» Views: 234
Lotus Twincam Water Pump
Forum: Technical
Last Post: buckssa
09-06-2017, 02:07 PM
» Replies: 0
» Views: 242
Ford Zetec
Forum: Technical
Last Post: Crockett14
07-24-2017, 02:57 PM
» Replies: 0
» Views: 324
L93 Phakisa 2017-07-08
Forum: Race Reports
Last Post: knightsbdh
07-15-2017, 08:21 AM
» Replies: 0
» Views: 366

 
  Carbon Fiber Birkin hood
Posted by: Richard Clarke - 10-23-2017, 09:08 AM - Forum: Technical - Replies (1)

I have a carbon fiber (new) hood for the Birkin for sale - any interest?  Also a new in the box imported aluminium head for the cross-flow 1600 Ford Kent - also for sale.  Both are obviously rare and unusual bits, the head was imported from North America.

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  clutch cable
Posted by: 082444Bow - 09-11-2017, 07:48 AM - Forum: Technical - No Replies

I recently purchased a Birkin with the 1600 Essex motor. However the clutch cable has gone and needs replacement. Where in the JHB area would I locate one.

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  Lotus Twincam Water Pump
Posted by: buckssa - 09-06-2017, 02:07 PM - Forum: Technical - No Replies

Im busy building an original lotus twin cam motor and during strip down noticed that the front cover which houses the water pump bearing assembly had worn and the bearing was sloppy in the housing. I bored it out and sleeved it with a bronze insert. 

A new water pump assembly, impeller, bearing and seat was purchased from Burton and straight away i noticed the bearing shaft lengths were shorter than the one i removed. Never the less i assembly the engine and whilst pressing the pulley hub on the shaft noticed that in order for the pulley to line up ,only a portion of the hub is on the shaft. 

After bolting on the pulley i have picked up a rocking on the pulley. All bearings have play but Im not sure this is acceptable. 

Has anyone else experienced this in the past? 

I can strip down the motor, but its a lot of work to complete, especially if i dont have to.



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  Ford Kent 16000 Thermostat housing
Posted by: jzeller - 09-03-2017, 11:50 AM - Forum: General Discussion - Replies (2)

Hi,

Anyone know where I can get a Ford Kent 1600 Crossflow Thermostat housing? Anyone have one lying around?

Regards,
John

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  Ford Zetec
Posted by: Crockett14 - 07-24-2017, 02:57 PM - Forum: Technical - No Replies

Good Day,

Can you please help me i am looking for Ford Zetec flywheel bolts can you please help me in the right direction or if you have some let me know thank you.

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  Lotus Twincam motor
Posted by: Stuart Donkin - 07-23-2017, 10:07 AM - Forum: Technical - Replies (2)

I own a Birkin with a 1760cc big valve tall block original Lotus Twincam motor. 85 mm pistons.
My cylinder head has been repeatedly skimmed by previous owners and the last skimming actually removed part of the outer edge of 2 valve seat inserts.
My head measures 4.462 in high. Factory new spec is 4.598 which means .136 in has been removed. I have read of heads still working at 4.520 in.
My head has a small crack through to the water jacket on the small flat area inside the combustion chamber immediately adjacent the bowl area in cylinder #2.
This can be welded up but the head will then need further skimming.
I also have several very minor cracks running from spark plug hole to the outer edge of the valve seat insert. They appear very shallow and compression was still good.
I am hoping that there is an expert out there with extensive knowledge of the twin cam head who can assist with the following.
1. My current head gasket is .051 in thick and a .065 in replacement is available. This should compensate for the additional skimming. ( Hopefully minimal )
2. Is there a risk of the cylinder head combustion flat area failing during use as a result of having the thickness reduced by .136 in (3.45mm) which is excessive?
3. As the bowl area is not directly affected by skimming I am not too concerned about this area.
4. Should the valve seat become a problem protruding beyond the head face is it feasible to install shallower seats and obviously compensate with overall valve/shim length?
5. Clearance of valves to the pockets in the pistons is a concern but the lower seat insert would solve that I guess.
6. My cam shafts have full vernier sprockets so timing will be carefully done allowing for the head height affecting chain length.

All comments and assistance would be greatly appreciated. Smile Smile Smile
Retaining this classic motor in my very special original Birkin is very important to me.
I am aware that replacement heads are available from Burton and other manufacturers but these are way outside my budget.
Finding a Twink head sitting on a shelf or residing in a scrap yard would be unbelievable.

Stuart Donkin

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  L93 Phakisa 2017-07-08
Posted by: knightsbdh - 07-15-2017, 08:21 AM - Forum: Race Reports - No Replies

The race weekend wasn't looking good for me - I had picked up a tummy bug, and things were dire. On Thursday the car just needed wheels back on, and it took all my strength (and quite a lot of medication) to finish that job. Friday morning I was worse. With more medication I was able to keep both ends plugged, and set off around 9am. 

I arrived at the track feeling almost human, only to find that my brake pedal went to the floor. A long process of bleeding all the wrong calipers, until finally - fourth time lucky - I got the right one. I managed two sessions on track before the day ended, with a 1:58 in the bag. Ignoring Wesley's 1:56, I was quite happy (and not feeling too ill). Many thanks to Andre and the Viviers' lads for helping with the brakes and wheels.

Quali was ok, but the draw was excellent. I got number 1, putting me next to Mackie on the grid. The race started with a good battle for 2nd with Wesley, who eventually locked up at turn 2 (quite spectacularly). Thereafter it was a fairly quiet race with Mackie always tantalisingly out of reach. I took 2nd place with quite a lead.

Race 2 was quite a lot more action-filled. I had stiffened up the suspension a bit, and it's quite evident from the video that I'm working hard for the first lap or so to keep the back of the car at the back (until the tyres warm up properly). I was thrilled to pass Mackie on the back straight, and keep him behind me for a the rest of the lap. But he got passed me on Turn 3, and on the back straight Johan got passed too. I managed be get back past Johan by taking a deep dive into Turn 2, and was then able to open a bit of a gap.

However, the pack behind me gradually eroded the gap - I think my line into the back straight needs improvement - and after a few laps Rudi caught up to me. Although there wasn't quite enough space, he tapped the gap a little wider and passed me in Turn 3. At turn 4 I had quite a big moment, giving Johan and Wesley the chance they needed. The race got really interesting after that.

Just before the last turn Johan didn't see me, and made a big cross-track move. Avoiding him put me half on the grass, and the car got VERY floaty. The was much relief as I felt the car straighten and grip returned, and I could pull her back onto the black. Juan and I were side-by-side through turn 1, always an entertaining way to do it, but I managed to pull ahead to turn 2. With another deep dive into turn 2 I got ahead of Johan. It was then a very close battle with Rudi and Wesley - both acting like taxi drivers on strike down the back straight (no way past). Past the line it was Rudi in second, Wesley in third, and me next by a mere 0.06s. Great race, and a great weekend.

On the drive back home I overtook someone on the N1, crossing the middle-line rumble holes. Next moment there's a lot of vibration, which doesn't seem to be going away. I looked in my side mirror, just in time to see most of my right trailer tyre exit stage right (fortunately no oncoming traffic). The sidewalls stayed on the rim, which protected it. Changing to the spare was a fairly quick job, with Andre again stopping and helping. Certainly a lesson for me about those rumble strips, and I share it so that others maybe learn from my experience without the concomitant school fees.

Race 1:
https://youtu.be/nI8Oyq06bbk

Race 2:
https://youtu.be/-Z-aA7zulxI

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  Lotus 7 grill
Posted by: mannyc - 06-15-2017, 04:46 PM - Forum: General Discussion - Replies (1)

hi guys, I'm kind of new to Lotus too, bought mine last year December. Where can I get the grill with the 7 on it ?

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  Radiator
Posted by: Diesel84 - 05-24-2017, 12:04 PM - Forum: Technical - Replies (2)

Afternoon guys,

Just a question regarding possible radiators.

At the stage in my locost build where I need to fit a radiator (and plenty of other things Sad ).

What are most of the guys using that fits in the nosecone? Engine is an old 2.0 Pinto (I know its not great but its a start Smile )

Thanks for your comments

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  Converting left hand drive 7 to right hand drive
Posted by: RoyG - 04-08-2017, 05:03 PM - Forum: General Discussion - Replies (1)

As per the title, what are the implications of converting a left hand drive Birkin to right hand drive? Is it possible, or does the chassis design not allow for it? I'm interested in the CS3-XS track chassis currently being advertised in the classifieds:

http://www.lotusregister.co.za/?page_id=56&id=191

It has all the components I'm looking for, but unfortunately it's left hand drive. I would want to use it on the road too, not just on the track.

Any info will be appreciated.

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