The Doctors Coupe - SRE 353G

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The Doctors Coupe - SRE 353G

Post by red rocket » Tue Jul 24, 2018 9:23 am

Nice work Ben - good to the see the old car remaining in good hands. BTW - what are you using to deep clean the drive?


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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Tue Jul 24, 2018 3:28 pm

David,

I fitted a spring, it didn't cure the rattle. But I'll report back after fitting a wavy spring washer.

Trevor,

I'm not sure yet, probably Gunk or Jizer brushed in then pressure washed off. I tried with some Swarfega driveway cleaner, but it's not man enough.


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The Doctors Coupe - SRE 353G

Post by CNHSS1 » Tue Jul 24, 2018 4:16 pm

I tried jizer, got 90% clean then a combo of cellulose thinners and a strong solution of biological washing powder cleaned the rest


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The Doctors Coupe - SRE 353G

Post by Stephenl » Tue Jul 24, 2018 4:17 pm

Where the base of the gear stick fits in a slot on the various changer bits on the bearbox there should be a little plastic bush. My gearbox (same as yours) rattles and I bought the bush as part of a "fitting kit" from one of the traders. yet to fit it but I decided that was the likely source of the rattle and play in the gearstick


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The Doctors Coupe - SRE 353G

Post by efi_sprintgte » Tue Jul 24, 2018 4:20 pm

I use this stuff:

https://www.screwfix.com/p/swarfega-oil ... 0wodt20IAA


It’s meant to be used 50:1

I find it very affective when used neat then pressure washed off


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The Doctors Coupe - SRE 353G

Post by Stephenl » Tue Jul 24, 2018 4:23 pm

http://www.scimitarweb.co.uk/sgwrs/view ... 10#p377710

Here is a picture - reduces rattle according to a poster on that thread

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The Doctors Coupe - SRE 353G

Post by David Tew » Tue Jul 24, 2018 4:50 pm

Hi Stephenl,
I had completely re-bushed the linkage, including that one, before Ben collected the gearbox.
However, the bush I fitted did look a little different to the one you have though so it will be interesting to see what Ben finds. 😉


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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Tue Jul 24, 2018 7:10 pm

I've got a paved drive, I thought I'd give some acidic patio & brick cleaner a trial. The full slab at the bottom was similar to the one above it. So that was quite effective. Just brushed on & hosed off (not pressure washed)
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Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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The Doctors Coupe - SRE 353G

Post by red rocket » Tue Jul 24, 2018 7:36 pm

Thanks all- will give these a go.


I only ride 'em - I dunno what makes them work

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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Tue Jul 24, 2018 9:21 pm

Hi Stephen, the base of the lever is already bushed...


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Mon Aug 06, 2018 9:29 pm

Last Friday, I put the coupe up on ramps & whipped out the gear lever pivot to add one of these:
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in here:
Wavy washer p1.JPG
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I was confident that my gear lever rattles would be over, there was certainly reduced play. So out I went for a test drive & above a certain rpm, it started rattling, but it’s quite an improvement on where it was, so the removal of play has made a difference.

I had a look on the gearbox currently on the bench to see if another washer here might be in order:
Wavy washer p2.JPG
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Before I put the new one in, I selected the best shims I had to reduce the play, but there was still a little left. This one is more difficult to get at, however, I noticed the overdrive output seal (to the prop shaft) is also weeping, so I’ll get a replacement & try to do the 2 jobs together. For now, it’s a big improvement though.

It's an arrangement with lots of pivots & bushes, the pivots for the lever are all cast iron to steel, an ideal solution would be to over bore the cast iron & fit brass bushes, but I doubt that will happen unless I find some spare time on my hands...

The other thing I noticed was the top of the gearbox (pretty much where the arrow is on the above photo) is very close to the body, despite the gearbox member being lowered about 4mm with spacers. I might just be able to elongate the lever hole forwards slightly to ensure the gearbox really isn’t touching the body.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Sat Aug 25, 2018 10:05 am

The alternator has been whining on the coupe for a while, I’m no fan of old Lucas alternators due to previous bad experiences, probably due to well used alternators on old cars in the past. However, the whine & the previous experience I decided to go with a Wosp replacement. They are used on a lot of race cars with great reliability, they are a small / light Denso based unit adapted for different applications. I’ve gone for a LMA200 (50 amp). This will give a bit more capacity when there is full current draw (lights, heater, heated front & rear screens all on) and potential for future upgrades. Old & new:
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It has a smaller pulley so needed a shorter drive belt but also the tensioner wouldn’t fit, a cranked one is needed in place of the straight one, so I made a quick modification, cutting it at an angle, turning one end through 180 degrees and welding it back together:
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With this mounted, the tensioner was at the end of the adjustment with a 1225 belt, but with a 1200 belt the alternator was touching the rocker cover with the belt too tight, so I need to make another modification to the lengthen the tensioner, but it was ok to use and the whine has gone. I fitted this before Curborough and the car drove the hour or so up there without issue. There have been no misfires for a while, so I’m hopeful that I’ve resolved that, although I’ve not driven the car in the searing heat that we had a few weeks ago.
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Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Sat Aug 25, 2018 10:44 am

Driving back from Curborough, I had an issue with the headlights. It turned out I’d made an error with the wiring, when changing the alternator. I’d mistaken the non-standard wiring that was already there. This lead me to check through how the wiring had originally been modified for the Lucas ACR alternator. I have now removed the original ignition relay & alternator controller as these have been superfluous ever since the ACR alternator was fitted. The existing wiring was modified to give the +12v feed for the regulator exciter and the spare disconnected wires, cut back & taped in the loom for now. I've not got the correct T-shaped connector & terminal cover for the Wosp alternator at the moment, but these will be ordered so the 2 spade connectors can't be fitted the wrong way round, and get rid of the electrical tape covering the ring terminal.

The alternator tensioner has had it’s second mod and the belt can be tensioned up a little more with room to spare (the stubbon water marks on the engine front cover are from where the water pump failed. Clearly I've not cleaned it off well enough yet).
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There are a lot of extra wires on this car on the near side inner wing, some I’ve already removed as I didn’t want / need, most of what’s left is relays for the headlights, I’ve checked through all this to understand how its wired in, but another than a little tidying, I’ve left these for now. At some point in the future, I will do some tidying up here along with some other wiring jobs.

I’ve had a few other minor electrical issues, which I investigated at the same time. The wipers weren’t parking, which was just a loose terminal in the motor connector. After removing the original ignition relay (as above) I traced the one mounted next to it on the bulkhead as the heated rear window, which also wasn’t working. The relay turned out to be dead, so that got swapped out and a spare ignition switched feed (green) taped away. I just need a misted rear window to check it's working. There were 2 other wires that were bundled up & weren’t connected under the bonnet; tracing them back, they weren’t connected behind the dash either, so I’ve removed them and also replaced a couple of spade connectors that didn’t look too clever.

This is the wiring just after I bought it
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This is it at the moment, still with a bit to do (the air intake pipe & routing is temporary for now, I need a slightly larger diameter to fit properly to the air filter housing)
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It doesn't quite look like the hand book:
v6 coupe handbook under bonnet photo.jpg
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Or the white concourse coupe at Curborough!
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Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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The Doctors Coupe - SRE 353G

Post by philhoward » Sat Aug 25, 2018 11:52 am

I’m sure 2 Lumenition units was a little excessive..but on the flip side, you’ve got a lot more (and one hopes more discriminatory) fusing than the original as well.


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The Doctors Coupe - SRE 353G

Post by BigBobPilot » Sat Aug 25, 2018 12:19 pm

One lumenition was for the ignition, the other the rev limiter.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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