Lotus Elan

New parts

PostPost by: MartijnElanS4 » Tue Jun 25, 2024 9:22 pm

Hi everyone,

We are a significant step further in restoring my Lotus Elan Sprint.

We spent a lot of time to put together the parts that we needed to change. The plan is to restore and not to just change everything. Then we think it loses it’s dna. So some things like chrome parts that clean up but not perfectly will be re used. Everything that can be cleaned will be cleaned.
Some upgrades will be done like replacing the donuts. The exhaust manifold was dented on some places so a stainless steel will be fitted. I intend to heat wrap them with titanium wrap.

The engine is completely apart and new rod bearings are needed due to wear. Anybody has an advice on which ones to buy? I know it for a S85 V10 but not for the Ford/Lotus.

If anyone has a set of chrome rings for the Sprint wheels I am interested.

Best Regards,

Martijn
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PostPost by: 2cams70 » Tue Jun 25, 2024 11:00 pm

MartijnElanS4 wrote:The engine is completely apart and new rod bearings are needed due to wear. Anybody has an advice on which ones to buy? I know it for a S85 V10 but not for the Ford/Lotus.


The Lotus/Ford has better designed bearings than the BMW S85 V10 engine in that they don't fail during the course of normal use so it's not particularly fussy about bearings. I used Mahle Motorsport bearings in my engine. Suggest you replace all the bearings whilst you are in there and not just the rod bearings.
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PostPost by: alan.barker » Wed Jun 26, 2024 10:35 am

Hi Martin,
How many miles on the clock.
Has it been rebored.
I hope your'e not going to put that plastic fan on the water pump flange. Certainly not original. Should be electric fan infront of Rad.
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PostPost by: MartijnElanS4 » Wed Jun 26, 2024 2:37 pm

Hi Alan,

Thanks.
It has 86360 kms and its a first owner car belonging to my uncle. It has the electric fan but this is the one attached to the waterpump. Isn’t that correct?
As far as I know it is original internally but I’ll check with my uncle.

Martijn
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PostPost by: MartijnElanS4 » Wed Jun 26, 2024 2:42 pm

Hi!

Yes the original BMW bearings aren’t great and therefore I will fit BE bearings from the US following the advice of my BMW specialist garage who has 3 V10’s himself.

Thanks for the advice. We are going to the change the crankshaft/main bearings as well if that’s what you mean.

Best regards

Martijn


2cams70 wrote:
MartijnElanS4 wrote:The engine is completely apart and new rod bearings are needed due to wear. Anybody has an advice on which ones to buy? I know it for a S85 V10 but not for the Ford/Lotus.


The Lotus/Ford has better designed bearings than the BMW S85 V10 engine in that they don't fail during the course of normal use so it's not particularly fussy about bearings. I used Mahle Motorsport bearings in my engine. Suggest you replace all the bearings whilst you are in there and not just the rod bearings.
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PostPost by: alan.barker » Wed Jun 26, 2024 3:31 pm

Hi Martin,
On my Sprint it was about same kms.
When i removed Pistons no wear in cylinders but a few piston Rings broken . Also piston Ring grooves worn.
I deglazed cylinders and bought a set of standard pistons. If never rebored you can find standard original pistons cheap at sjsportscars. I also fitted Vandervell bearings which i like. New Oil Pump also.
There should not be the plastic fan on water pump pulley.
Have fun
Alan
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PostPost by: MartijnElanS4 » Wed Jun 26, 2024 6:56 pm

Hi Alan,

Thanks for the feedback and tips. Much appreciated!
I’ll keep you posted.

Martijn
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PostPost by: stugilmour » Thu Jun 27, 2024 2:13 pm

Martijn, I tried wrapping my stainless exhaust manifold but was never really happy with the effort.

I had the pieces ceramic coated inside and out, which reduced the heat somewhat. I also attached some foil faced insulation to the fibreglass bulkhead around the exhaust which seemed a better solution to heat.

All the best.

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PostPost by: rgh0 » Fri Jun 28, 2024 6:13 am

stugilmour wrote:Martijn, I tried wrapping my stainless exhaust manifold but was never really happy with the effort.

I had the pieces ceramic coated inside and out, which reduced the heat somewhat. I also attached some foil faced insulation to the fibreglass bulkhead around the exhaust which seemed a better solution to heat.

All the best.

Stu


I did the same plus put some foil faced inualtion on the hood above the exhaust as that got very hot also especially when the car was stopped from heat soak

cheers
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PostPost by: Andy8421 » Fri Jun 28, 2024 9:52 am

+1
The Tony Thompson competition manifold gets very close to the side of the passenger footwell, so much so it was beginning to char the glassfibre - which I was not happy with. I have seen others who race who have cut the footwell back and have glassed in a new bulkhead to avoid this.

My solution was to wrap the manifold in heat resistant tape and to mount metal backed insulation between the manifold and footwell. This may work for you.

I tried self adhesive heat shielding first which lasted about 10 minutes before the glue melted - it needs to be rigid and screwed on. Even with this, the heat is beginning to cook the paint off the firewall above the manifold. Demon Tweeks offer a large range of heat management products (at a price). I bought the products I used from here:

https://www.demon-tweeks.com/uk/motorsport/car-preparation/heat-shielding-protection/
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PostPost by: alan.barker » Fri Jun 28, 2024 10:03 am

On my Sprint there is some sheet alloy riveted to body to protect from heat. Fitted by st Miles or if not at Tollgate Engineering by Terry Tozer when built from Kit.
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PostPost by: prezoom » Fri Jun 28, 2024 2:58 pm

I have found that using some spacers/washers on the fasteners between a metal shield and the body, for a gap to to permit air circulation between the shield and the body. This seems to protect the fiberglass and reduces the transfer of heat.
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PostPost by: MartijnElanS4 » Wed Jul 10, 2024 4:23 am

Hi,

Thanks everyone for all the suggestions about heat control in the engine bay. I will look into all options and get back to what we have chosen to go for.

Have a great day,

Martijn
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PostPost by: 661 » Wed Jul 10, 2024 9:23 am

MartijnElanS4 wrote:Hi,

Thanks everyone for all the suggestions about heat control in the engine bay. I will look into all options and get back to what we have chosen to go for.

Have a great day,

Martijn


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