Asse camme Abarth 124 SR 1600

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kanningen
Posts: 4
Joined: March 24th, 2009, 4:16 pm

Asse camme Abarth 124 SR 1600

Post by kanningen »

Hi guy I own abarth SC O8 cams or S008?. Not sure, 124 SR 1600 to catalog and will be used in a 1608cc engine in my 125 special.

I have a set of 40 idf original first series, with tubes, I know that Set recommendation. For this cam

My engine now has paramethers the Following:

1. Bore 81mm, stroke 80mm.

2. size valves: in: 43.5 mm (2.0 Lancia valves); ex: 36mm (standard)

3. Carbs: 2 IDF weber 40mm, standar.

4. Cams: Abarth 124sr1600. Ignore data from this cam? HELP ME?

5. the header is hand made 4-2-1.

6. The head WAS Worked from a specialist chilean That included: polishing it, bigger seats and admission ducts, seating angles have the changes file to 35 € šÃ ° (from 45 € šÃ °) and Worked the valves guides.

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Guy Croft
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Posts: 5039
Joined: June 18th, 2006, 9:31 am
Location: Bedford, UK
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Re: Asse camme Abarth 124 SR 1600

Post by Guy Croft »

Please tell me exactly what the question is.


G
kanningen
Posts: 4
Joined: March 24th, 2009, 4:16 pm

Re: Asse camme Abarth 124 SR 1600

Post by kanningen »

1.-Cam Lift(mm) ? mm Inlet/Exhaust

2.-Valve Lift(mm) ?mm Inlet/Exhaust

3.-Duration ??? Deg Inlet/Exhaust

4.-Timing Inlet - Exhaust

5.-Full Lift ??? Deg Inlet

6.-VC (mm) ?? mm Inlet/Exhaust

7.-LTDC ??mm Inlet ??mm Exhaust

8.-Power band RPM.


Really Thanks.
Guy Croft
Site Admin
Posts: 5039
Joined: June 18th, 2006, 9:31 am
Location: Bedford, UK
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Cam Abarth 124 SR 1600

Post by Guy Croft »

With an unknown cam - which this is - to me and you - the rules for setting up are simple:

1. Cam Lift(mm) mm Inlet/Exhaust - Measure it with a dial gauge

2. Valve Lift(mm)mm Inlet/Exhaust - Set up the clearances and measure it with a dial gauge

3. Duration Deg Inlet/Exhaust - You really don't need to know this. I rarely use it.

4. Timing & full lift - you can set them up with anything to 100 - 110 degrees.

6. VC - set ex at 0.018" and inlet at 0.016" cold with tolerance of +/- 0.002"

8. Power band RPM - you will find out.

You will have to get yourself organised with protactor and dial gauge etc and read my 'How To' below.

Please note that under Site Protocols you are NOT permitted to use Photobucket - use the internal site hosting service I have provided. I have deleted some of your photographs because of this. There are good reasons for this and the rule is posted on the site. You risk being banned if you do not respect this.

GC
Attachments
cam timing_finding true full lift on head.jpg
cam timing_finding true full lift on head.jpg (115.3 KiB) Viewed 5043 times
Cam timing and dry-build_with photos.doc
ESSENTIAL INFORMATION ABOUT SETTING-UP CAMS ON A TC UNIT
(491.5 KiB) Downloaded 354 times
protractor and dial gauge in use - all twin-cam engines are timed up this way - head upside down on the bench. Never, ever do this on the engine.
protractor and dial gauge in use - all twin-cam engines are timed up this way - head upside down on the bench. Never, ever do this on the engine.
JB eng_ex FL.JPG (120.62 KiB) Viewed 5042 times
doing a dry-build to measure valve to piston clearances. The closer FL is to 100 deg the smaller the vertical clearance will be.
doing a dry-build to measure valve to piston clearances. The closer FL is to 100 deg the smaller the vertical clearance will be.
JB eng_dry build - and measure it.JPG (99.37 KiB) Viewed 5042 times
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