The bottom line is if you’re car is finally running great that’s what’s important, as Jayhawkj already said. Admittedly my first thought was that the cam is now too far advanced, without the degreeing numbers it is an unknown. You would obviously know by loosing the power up top on the rpms. The thing with these engines is the more you take off the cylinder head the higher the compression will be as well as retarding the cam timing, I’m wondering if enough was taken off the head and you advanced the cam one tooth (9.5 degrees, I think) also taking into account what Commdådaren mentioned, could that put you where you’re at on the ccr?Spent a good day on the motor and the lesson I've taken is to never throw anything away until it's running again..thankfully I didn't!
Put the original cam back in, sussed out that both means of valve timing work but can't be mixed. Split the timing chain again and managed to derailed off the crank sprocket so 1 hr spent getting it meshed again with tig welding rods.
Refitted the original (cleaned and calibrated) Solex back in place of the new 32/36. Found #2 new spark plug defective so refitted original Bosch super 4s. Ignition retimed to spec.
The engine is purring after fune tuning the solex. Further to the wild vacuum readings taken on Thursday with the Isky cam which pointed to failed head gasket I now have a steady 20 hg at idle with the original cam back in.
In one of my earlier posts on this thread, i wondered how the 32/36 was able to supply enough air to the engine as mine seemed air starved at idle with max 1.5 turns on the idle speed screw. The only way I could keep mine running was to wind the 32/36 idle screw in to max which uncovered the enrichment ports resulting in wet plugs.
At various stages today, I also ran compression tests. These surprised me big time but backed up my initial thoughts with the 32/36 that the motor was air starved with this carb. The results were the same cold or hot - 190 - 200 psi dry. Still finding these reading surprisingly high for a petrol motor.
Anyway, the expensive conclusion have come to is that the 32/36 carb and Isky 66 combo cam are not compatible with my 1900 SH engine.
If this info helps someone in the future, I'll be very happy.
If someone here wants to buy a new Isky 66 combo cam and Weber 32/36 ( I have put in a new power valve after previously trimming the original spring) for a big reduction let me know.
Thanks to all you guys advice and info.
Unless you have a crankshaft with a bit longer stroke than 2.75” 🤷♂️ Then that might account for the issues that you had with the combo cam.
Just curious, how is your ignition timing set up now? I assume you’re running premium pump gas, are you experiencing any pinging? What octane gas is available in France?
The 32/36 jetting sounded correct except you should have had a 60 idle jet on the primary.
I’m in the minority but on my stock 1.9 I loved my Solex and had a lot of fun with it while it lasted.
Best of luck just enjoy your success, very happy for you.