"we're gonna give it a red hot go!"
The car is VC SL/E 310 pack. It has 4 wheel discs and LSD.
It was 308 auto and due to my budget (none) we are using bits and pieces I have laying around and can beg borrow or steal.
So it will have 3.3 black/blue (unsure as the motor I have is painted red ) and manual, this swap has issues within its self as the pedals have to be changed and the tailshaft might have to be altered.
The dash cluster has also been removed and the loom chopped. I have another SL/E tacho dash and have to wire it in.
The project offically started last night and in absence of the car the engine preparation began. "Grasshopper" (Heath) came over and pulled the A/C bracket, air pump, thermostat outlet and manifolds off.
I started adapting a WW2 stromberg to the Varijet manifold and here is the 1st budget (theres that word again) tech tip.
I have read a couple of posts over time about 253's using too much fuel, as well as the usual suspects, float level, needle and seat, timing etc, these carbies can have an inbuilt fault that is hard to detect.
The bit with the spring on it in the middle of this pic. (red arrow) is the power valve plunger. This plunger opens the power valve when you put your foot down and relies on vacuum to stay up and keep the power valve closed at cruise. The groove around the back of the airhorn (blue arrow) is the channel that supplies manifold vacuum to the plunger to keep it up. If there is warpage in the airhorn and/or the carby body, this channel can leak vacuum and the power valve may be always open. The slotted port at the bottom of the pic (yellow arrow) is the port where engine vacuum gets to the top of the piston to hold it up. You can test the plunger operation by applying vacuum via a hose from a running engine if you dont have a vacuum pump.
This is the plunger removed from the air horn. Arrowed is a tiny "welch plug" in the end of the plunger piston. This "welch plug" can be known to fall out and the result is the power valve is always open. If by using the test mentioned above, your plunger doesn't rise with vacuum applied, chances are this plug has fallen out. The 6 cyl carbies have a similar plunger though I have never seen a 6cyl one fail.
Also last night began adapting the manifold. I don't thing anyone makes an adapter for this carby swap so I am making one fron 12mm alum. flat. More pics to come.
I am off to Mathoura tomorrow to pick up the car and returning Sat.
Later will doing a budget distibutor "tweak" with pics.
Edited by rodomo, 07 December 2006 - 07:33 PM.