timing

[one eyed mick]

Just fitted Newman fastroad cam and modded head [ std valve sizes ] to my 2.1 pinto have set ign timing to std 8 btdc seems ok but cant try for 10 days [on sorn ] any comments veiws advice . Std Bosch electronic ign,38 dgas ,4/2/1 10 .5 is comp hope you can help ,will be rolling road set in may but would like to get it somewhere near before then

[ch427]

i would guess at somewhere between 8 and 12, if it starts and runs ok then it cant be far off.

[TheLastPost]

Personally, for initial set-up I just swing the dizzy until it gives the smoothest, sweetest idle. If it pinks under load, back it of a tad.

Completely non-scientific, but it usually works for me until I get the chance to put it on a rolling road...

[PaulKemp]

I take it you have also timed the cam in?

[one eyed mick]

Cam set as std , swung distrib got nice 950/1000 idle sound great running no load [cant rt yet on sorn ] will dial cam in on rr later .Iwas only realy looking for confermation ,thanks guys

[one eyed mick]

Update ,runs better@12degs before tdc so will see when I get chance to road test

[Furyblade_Lee]

When I was still a schoolboy racing the minis, our half baked attempt was to keep fiddling with the dizzy until you could pull away smoothly in 3rd gear! Whatever you do I would not run a tuned expensive engine too hard until you have had it tuned properly.

[one eyed mick]

Was taught to dizzy swing by along gone guy who played with lambo,s etypes ferraris and mercs[40 +years ago] was looking for ball park figs to set up with timing light for a sim spec engine

[PaulKemp]

Cam will need to be timed in as fast road cams have a different inlet valve fully open point compared with standard
I think Newman cams time at 110 ATDC

[one eyed mick]

HI Paul yes it is full inlet lift at 110 degs atdc ,I set it up std to get it running and intend to dial it in when I go to r/r session hope fully next month