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1776cc dellorto 40's NON START !!

i dont seem to be having much luck with this engine i've built.

1776cc , Engle 110 cam , Dellorto 40's the only thing i have done wrong is ive got the distributor drive gear 90 out (ie the offset lies nearest the crankcase seam - vertical if you look down the hole and not horizontal as the Haynes manual says ) but i'm happy i know where TDC is for No 1 and ive rotated all the plug leads 90degress out aswell....... I set static to 7.5degrees BTDC - used the multimeter method. With the carbs i bought the Dellorto Superformance Book and followed the pre-tune - feller gauge down barrel , 3 turns on mixture screws. Turn the Key hear some compression noise (engine turns over ok - tight but ok ) .... Then a Big loud BANG of backfire !!! I'm tired , pissd off , i've worked all saturday (12+ hours) all day Sunday , i'm confused because i'm happy everything is set up

Any one got any ideas ?? Many Thanks

:-(

John

snipped-for-privacy@blueyonder.co.uk

Reply to
John Skeldon
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...move the spark plug wires one spot all the way around the cap....suyre sounds like you are off by one.

....Gareth

Reply to
Gary Tateosian

I agree. There are **TWO** TDC spots for #1. Only one is the firing stroke.

Set the engine where the rotor arm points to #1 plug wire. Then remove the #1/2 valve cover. #1 Intake AND Exhaust valves *must* be closed (rocker arms loose).

If they are *not*, you are not on firing stroke.

Speedy Jim

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Reply to
Speedy Jim

I believe we _all_ mess up the plug wiring at least once. Check again, being sure that #1 is truly on the firing (compression) stroke, check rotor position and plug-em all in again. 1432.

Reply to
jjs

To be honest Jim I thought I was on the firing stroke but yet again I'll check again (I was half asleep when I set the valve clearances )

Thanks

John

Reply to
John Skeldon

It sounds like electrics to me too.

Gaz

Reply to
Gaz Pike

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