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Author Topic: Engine build advice  (Read 2565 times)
Rich_h
Newbie
*
Posts: 32


« on: February 16, 2014, 19:58:02 pm »

So I'm  looking for some advice on my next motor  build its a street & strip engine based around parts I've been collecting
so I have
74mm CB crank
Street Eliminator (42 x 37.5) 94 bore
94mm a spec pistons
Fk87

My questions  is it best to run a set of
Cb Super Race Rods - VW rod journal - 5.325"
Or
Cb Super Race Rods - VW rod journal - 5.400"
With barrel spacers
On this spec
 
Cheers Rich

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spanners
Sr. Member
****
Posts: 286



« Reply #1 on: February 19, 2014, 17:26:48 pm »

With that short stroke you could use the short rods with good results, the higher piston speed/accelerations give good cylinder filling, but why only the 74 stroke? just  Be sure to check piston underside clearance on the crank webs at BDC ,
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Best regards, spanners.
Zach Gomulka
Hero Member
*****
Posts: 6991


Don't piss down my back and tell me it's raining.


« Reply #2 on: February 19, 2014, 22:03:15 pm »

Definitely the short rods.
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Born in the '80s, stuck in the '70s.
Taylor
Hero Member
*****
Posts: 577



« Reply #3 on: February 20, 2014, 00:32:21 am »

Yeah because you're going to notice the .075".  Use whichever ones you can get cheaper.  unless you're hell bent on making your motor .150" narrower.   
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Rich_h
Newbie
*
Posts: 32


« Reply #4 on: February 21, 2014, 00:34:46 am »

I have been collected bit over the last few years and in so my build has change over & over again
The first plan was to be 74mm & 92mm 1967cc but the 94mm cut heads turned up so all Change
Plus want to build something different  Grin
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