engine spec

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andyw55
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engine spec

Post by andyw55 » Tue Mar 31, 2009 9:03 pm

Hi guys im sur you get asked this all the time, i want to build a 2110 for my 55 van! was wondering what cam you would recomend

thanks
Andy

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orb
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Re: engine spec

Post by orb » Wed Apr 01, 2009 9:23 am

Give Ben or Matty a call at the RACESHACK - they'll be able to advise the best cam - it all depends on what you want to use it for and where you'd like the power to begin and end.
Mine is super lairy and doesn't start making any sort of real power until at least 4k is on the tach and doesn't make it's full power until 6450 rpm - but I'm chasing down time on the strip not pootling down the shops :D

http://www.raceshack.co.uk/

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bobley
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Re: engine spec

Post by bobley » Wed Apr 01, 2009 12:49 pm

Engle 120 with 1.25:1 rockers for a torquey camper. Engle Fk8 with 1.4:1 for a slightly more top endy engine in a lighter van. I've gone for the FK8 option in a 5spd camper but you do need to be able to switch cogs easily and I'm struggling to get used to it at the moment.

Engle 120 is the safe bet.

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JMR
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Re: engine spec

Post by JMR » Thu Apr 02, 2009 1:03 pm

Optimum cam choice isn't related to engine size, although that's one factor in the equation.
How well a particular cam works will depend on port and valve size, compression ratio, carburetion, gear ratios etc.

If you know someone with a similar vehicle/engine combination and like the way it drives, copying their cam selection is probably a safe bet. But fit alternative heads, carbs, exhaust etc and the engine can behave very differently.

Cylinder heads are the biggest influencing factor. In an ideal world you have cylinder head flow and port velocity figures (real figures, not those used in the ads!). That info allows you to zero in on the 'ideal' cam.
John Maher
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bobley
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Re: engine spec

Post by bobley » Thu Apr 02, 2009 1:28 pm

True. I would think a 2110 would work well with a CNC round port head, with a nice valve seat job. I guess 40/35.5mm valves with the Engle 120 and 42/37.5mm for the FK8?? :wink:

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JMR
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Re: engine spec

Post by JMR » Thu Apr 02, 2009 1:40 pm

bobley wrote:True. I would think a 2110 would work well with a CNC round port head, with a nice valve seat job. I guess 40/35.5mm valves with the Engle 120 and 42/37.5mm for the FK8?? :wink:
Not necessarily :wink:
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