Lurker upto now - 1st post....
Untouched 1300GT engine from Donor with standard downdraft spanish weber copy. Engine runs & ticks over fine. Opening throttle leads to bangs & flames out of both ends. Dwell + Static & dynamic timing checked (many times). New plugs, points, condenser, leads, rotor arm & dist cap. Float levels seem ok. Any ideas? Engine ran absolutely fine in Donor before removal.

Check the advance mechanism in the distributor ,may have stuck if the engine has been standing since removed from donor, will not cause problems at idle but could at higher engine speeds. Rusty

Distributor 180 degrees out, remember camshaft is half speed of crankshaft? Don't know why it would tickover though and you say you've checked timing (only on number one though?) Maybe 180 out and plug leads out as well. No that's just daft. No idea!

Cheers

vacuum advance all plumbed in correctly?

Sounds like siezed weights in the dizzy to me

I have to agree with Mark A.
Gotta be the dizzy.

or maybe an inlet valve or 2 sticking open ?

Banging/popping could be a sign of a very weak mixture. I would be looking at carb first.
Also coils could give similar symptoms. You havent supplied a ballast resistor igniton coil with 12v by any chance?

And you have blocked the servo union I hope. Is/was there not a small vacuum pipe from the carb to the air filter also? Sounds like it's too weak to me, if the bob weights were stuck then the engine would be retarded at high revs, so no fire out of the carbs.



Hi everybody.

Could be the dizzy by my first move would be to clean the carb jets and check the accelerator pump is squirting,

Also of course forgot to add being a Ford check the firing order is 1,2,4,3 not 1,3,4,2 as it on every other 4 cylinder engine.

sticking valves

Finally got the chance to remove the dizzy & check. Seized solid. Cleaned up, lubed, refitted & retimed......

Runs beautifully - thanks to all for the help!

This is REALLY interesting - my 1600 X-flow behaved exactly the same way last time I ran it, in exactly the same conditions.

Looks like it's dizzy-out time!

David