Q91CMV - Dutton Legerra ZS Series 2

[Adrian Southgate]

So, MOT sorted by the skin of its teeth, loads to do before tomorrow morning, panic has set it due to a little mishap with the pedal box...

How many of you fitted metal spreader plates between the pedal box and the bulkhead? Here is something for those of you with pinto engines to think about.

I didn't see this coming 8 years ago when I re built it... The holes are supposed to be there... the crack around the edge is not.

Seems the proximity to the manifold has weakened the fibreglass of the tub a little

Well a lot actually :)

A metal spreader plate on the inside would have eased the load on the area and this may not have been quite so severe. This is going to be a fun evening..

[Dave Adams]

I also have 1 and a half 38 DGAS carbs.....one brand new...well 30 years old but unused.

[Dave Adams]

Nick chick uses a single side draught and his pinto runs very well.....I also have run a 38 DGAS with bored out chokes and with the base butterfly's filed thinner with the cold start choke flaps removed on my pinto. it gave slightly better midrange and no obvious benefit to top end it did however use more fuel.

[Nick carlin]

I'm using a single dcoe

[Nick carlin]

I used this to get a rough idea for the dcoe
http://cnx.org/contents/a0a6da11-6437-404f-8cd3-10853a08b685@2/Sele...
shouldn't be to different for the dgas carb gave a good starting point

[Adrian Southgate]

I'll look to see if I have any F30's in the spares box.

I looked at a load of 'stuff' on other forums and they all give such varying solutions. Found out some interesting stuff about DGAV carbs which I might also try as I have a spare DGAV body I can bore out to 30mm (which will give way more airflow than the 27/27 on the DGAS.

Other tricks included taking off the choke flap and spindle on the aux bore as it's not used when slow running, Boring the venturi out, etc.

The car is currently fitted with a 32/32 but not sure if its a DGAV or not. I'm not after huge gains in HP, just want to make the most of the cam that was fitted on the rebuild.

[James Doulton]

Here is what I think, for what it is worth:

In the V6, the two chokes feed one bank of cylinders each, with a small balance hole in the manifold. This means that each choke sees slightly stronger pulses as the individual cylinders draw their charge because there is less overlap. In your case, if both chokes feed into a shared 'plenum' like the standard pinto manifold, then the carb will see 4 pulses per two revs instead of 3, so that will be a smoother air supply. That is likely to mean that you'd need to set it up leaner. (The fuel supply through the jets has more inertia than the air so it doesn't keep up with the pulsation as well but will get there in a smooth flow)

On top of that, the V6 manifold is pretty crap, with the middle cylinder on each bank getting a richer mixture than the two end cylinders. So in order to get the end cylinders right, then the whole carb is set-up rich. So further indication that you want it leaner.

On the other hand, if it is too rich then it will still run okay but if it is too lean then you can ruin your engine, so I'd be tempted to try it as it is. But I'd guess that it would be rich.

[Adrian Southgate]

Rebuilding a DGAS for the legerra. My engine is 2037cc according to Mr James maths and is running a mild performance camshaft. I don't really want to have to mess about with the carb once its on the car so does anyone have suggestions (sensible ones) about what size jets I should be running as a start point.

The settings for the V6 essex engine are as follows.

main - 1.45

air corrector - 1.85

Emulsion tube - F50

Idle Jet - 0.45

pump jet - 0.70

needle valve 2.50

Thats what is given on the spec sheet I got with the service kit and the idle jets which I checked last night are 0.45 so I am assuming all the original 3 litre jets are still fitted. 

Any suggestions welcome.

[Adrian Southgate]

So, you get home from work and park the car with the roof off, go in, make a brew, come out and it's started to drizzle .

There is only one job you can do in the drizzle that doesn't involve lying in the wet. So 1200 grit and a soft foam block in hand I started rubbing down the white patches on the legerra. The drizzle kept coming and by 10pm I had most of it done. I was more than a little damp and as it's supposed to be dry in the morning I' try to get some photo's. 

[Adrian Southgate]

Actually I have to go back and pay him tomorrow as I forgot my wallet :(

I was surprised that the front suspension mods were ok, did that side to side machine rattle thing which had me worried but it seemed ok. The shocks and springs on the front are a definite improvement but really need to get the tracking done. It also seems I have more neg camber on the drivers side than the n/s, might need to look into wishbones and adjustable TCA's next.

[Dave Price]

MOT, great result. Sounds like your right foot is keen to get going.