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chaseracer

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1 minute ago, chaseracer said:

IT'S OFFICIAL: the 720 is in-build at Sparrow Central!

The Visa Solex is in a bucket of petrol and the new tinware is off to the powder-coaters this week.

Surely the petrol is meant to go in the carb? Not the carb in the petrol?

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  • chaseracer changed the title to Dyane: more colour - in an unexpected place...
  • chaseracer changed the title to Dyane: 602 is OOT...

In other local Dyane news, Laurence is a glutton for punishment, it seems!

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This moved under its own power yesterday, for the first time in 20+ years.  The engine came out of the original racer circa 1995, and was used in at least one 24-hour race; it will have a check/light rebuild then go back in.

 

EDIT: Further prodding has revealed a considerable amount of bran flakes where large areas of the chassis used to be.  I think we've found our winter project...

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Yes - 9:1 pistons for racing, so Dyane motors were always favourite before the right parts became more easily available to rebuild a 2CV engine to the higher spec.

2CV 602 - CR=8.5:1 (29bhp)

Dyane/Ami8 602 - CR=9:1, with assisted induction from the fan via the tube on the top of the shroud (33/35bhp, depending what you're reading)

Sparrow 720 - block machined to accept larger steel barrels, so CR may be slightly higher; 48bhp running the standard twin-choke carb and cone filter, will be a few more with assisted induction through the Visa 652 Solex.  We'll know more when it's been tested on the rolling road.

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  • 4 months later...
  • chaseracer changed the title to Dyane: back on track...
  • 2 weeks later...
  • chaseracer changed the title to Dyane: 720 build begins...
  • chaseracer changed the title to Dyane: 720 build nearly complete...

The car itself will go to Hereford in the new year, while the bodywork (door bottom repairs / window seals / new locks) will be done by my mate Spanners near Solihull.  This is convenient, because I need to clear the garage for electrical work on Chaseracer Towers.

It's all starting to happen quite quickly...

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  • chaseracer changed the title to Dyane: 720 build complete, car now on its hols...

The new engine has been run on the test rig - I saw it yesterday - so now Pete will fit it to the car, complete a fairly short job list (front windows/seals, new shocks, E10 fuel line, sort rear lights) then get a ticket and shake it down for a couple of hundred miles.

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  • chaseracer changed the title to Dyane: 720 in, new horrors revealed...

 

Military strategists will tell you: no battle plan survives first contact.  And so it is with work on old cars...

Actually, it ain't that bad.  The new engine's in, but a few small issues have been discovered by Mr Sparrow and his crack team.  A rear wheel bearing was a bit noisy, so has been replaced.  The gearbox had something in it that might once have been EP80; it now has the excellent lube Pete uses in his race car, as well as a new breather.

The big one is this:

image.png

That used to be the sender unit in the top of the fuel tank, which is also full of gunky shit.  Might* explain some* of the running issues.  Replacing tank/sender with new: "do it once, do it right".

 

image.png

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