Camshaft identification

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ace124
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Location: Pafos Cyprus
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Camshaft identification

Post by ace124 » January 11th, 2011, 6:15 am

I have a couple of cams that im having difficulty identifying.
They measure 10.25-10.3mm total lift (measured with dial gauge off base circle)
Duration with protractor as best i could measure is: 129* @ 0.5mm lift
116* @ 0.8mm lift
97* @ 1.3mm lift (0.05')
This is obviously cam duration.
They seem to be billets and the Ex has a distributor drive gear cut.
The only markings i can find are A24 1 thats on the end of both cams.

Im thinking they may be alquati spec grinds made by C&B??
How should they be timed initially?
Any further info would be great.
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Guy Croft
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Re: Camshaft identification

Post by Guy Croft » January 11th, 2011, 10:39 am

Alquati steel billet, 40/80 80/40, 10.35mm lift, 0.4mm running clearance (cold). Originally designated for 'medium modified' 124 Sport Fiat (with distributor gear) 1600cc. Good cams, wear is unusual but lift can be checked with a dial gauge (dti), though use in a bigger engine will make them comparatively 'milder' in performance than the 1600.

Camillo Alquati, for those who do not know, was an Italian manufacturer based in Cremona. He passed away in 2005.

G
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SS Alfa_ checking cam lifts.JPG
steel billet for a 2 liter Alfa Spider unit, checking peak lift with a dti the cam journals on Vee blocks.
SS Alfa_ checking cam lifts.JPG (108.82 KiB) Viewed 2565 times

ace124
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Location: Pafos Cyprus
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Re: Camshaft identification

Post by ace124 » January 11th, 2011, 11:08 am

Thanks for the fast response Guy.
Ill be running them in my current 1800 engine. 10.4:1 CR, 45's/36mm chokes, 43.5mm In valves, ported head, 421 manifold, electronic ig etc.
What is the recommended full lift position of these? Any idea of LATDC with this setting?

Also, plan on using them in my 1400 engine when i move back to Cyprus. Do you think they will be too 'hot' as a tight hillclimb/forest rally type cam (mid range torque)? Ill be using 40mmDHLA's and prepared head as per your book?

thank you

Guy Croft
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Re: Camshaft identification

Post by Guy Croft » January 11th, 2011, 11:57 am

No idea of LATDC sorry. Contemporary setting would be ((80+40+180)/2)-40 which is 110 deg, but I would be tempted to go with a closer lobe separation and use 105 inlet 108 ex.

You can certainly run them in a 1400.

GC

124racerinIA
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Joined: January 26th, 2011, 3:27 pm
Location: Iowa

Re: Camshaft identification

Post by 124racerinIA » January 26th, 2011, 5:56 pm

Guy,

I am installing these cams in the 1974 124 Spider I,m preping for SCCA competition. I am using the stock 1756 motor with a header and a 34dmsa carb. My question is:

After installing the cams per your instruction on 110 deg. centers, the pointer is off from fasctory spec. To achieve 105 deg on the intake should I back up(rotate counter clock wise) the cam gear to better match the hole and the pointer from the factory?

Jon
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Alquati A24 1 Intake cam
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Guy Croft
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Re: Camshaft identification

Post by Guy Croft » January 27th, 2011, 10:47 am

That is by no means unusual and it is precisely what adjustable camwheels are for,

G

124racerinIA
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Re: Camshaft identification

Post by 124racerinIA » January 27th, 2011, 1:10 pm

Thanks

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