Innocenti 120

[OzOAP]

[spoon.450]

Looks a quality engine build, credit due to you....what is the spec ?

[spoon.450]

.....gearbox too !

[OzOAP]

Looks a quality engine build, credit due to you....what is the spec ?

1293, a few lightened parts, 37x29 head, Piper 255 cam, conical valve springs, 1.3 rockers, SC gear kit and drop gears, Twin Dellorto FZD carbs.

[LuisM]

Great Work Ian!
love the details...

the rubber gaiter in the rod change selector rod , i know this is a Innocenti feature... are they hard to get ?
and is the housing same as minis, or they differ where the gaiter fits ?

Cheers
Luis

[OzOAP]

Loads of bits have been difficult to get for that car! I have never seen one of them gaiters for sale.
The housing is different for the seal to fit.
It also has bushes fitted for the rod to run in.

[LuisM]

Thahks Ian, I’ve seen that gaiter long time on a wrecked Inno but could not get it , i got the gear lever which is also smarter than the mini ones , instead of the ball at the end it has a kind of plastic ball bearing which causes less wear on the selector yoke/eye.

Cheers

[OzOAP]

They did do some good 're-engineering" on parts...pity they didn't rust proof the hatchbacks a bit better.

[Mini Mad Swede]

Changing gears on the Detomaso was incredibly smoother than a mini, always thought it was down to wear but maybe you just proven why it was.
Also it felt like a 'shortshift' but far nicer!

Almost a shame hiding that crank inside, looks so nice!

Why such valvesprings? Edit, looked at your Fb page.

Seems odd having such big inlet valves combined with a moderate 255 camshaft and 1,3 rockers, but then you are a far more experienced enginebuilder than me (if you are the one I think).
Edit2: And you are that one

[OzOAP]

Conical valve springs have huge advantages, so much so, the clowns of the Mini 7 Club Committee have changed the regulations to banned them.
Lighter components, single spring, less parasitic losses, less pushrod flex to maintain valve timing and lift, the same seat pressure as conventional springs but with lower 'over the nose' poundage.
Watch the Comp Cams video.

https://youtu.be/448OQVkulX0

Piper 255 is the king of road cams in my opinion. Over 35 years I have fitted most cams in that range, and non can compete with the 255.

The head was one I had on the shelf, absolutely beautifully modified but had a damaged inlet seat. It was originally a 36 inlet, but to make it usable we had to go to 37.
Given the choice, it is not the right size, but as it's going in my car I can live with it...and it has saved a weeks work or £1500 for a new head.