Re: Fwd: Need advice (engine swaps)

["Stephanie E. Gill" <gillS1@zianet.com>]

ChuckKuecker wrote:
> 
> At 15:12 4/27/97 +0000, you wrote:
> 
> >Hi Solh,
> >
> >I meant the intake. If the 2.1 is a stroker (longer connecting rods),
> >would the standard manifold on a 1.8 suffice?  I mean, would it mean a
> >couple pistons shooting through the 1.8 manifold without proper
> >clearance?  I know the 2.1 is really a drilled 2.0 but I figured that
> >longer rods were installed to make the compression (???) higher.  Are
> >the 2.0 intake manifolds identical to the 1.8 or are they slightly
> >larger?  50mm?  Clue me here!
> >
> >
> >Steph
> 
> The manifold should never come near the pistons, unless you are doing
> something VERY naughty!
> You are thinking of the head - and a stroker usually needs different pistons
> and/or
> rods, which results in the same deck height (how close the piston comes to
> the top
> of the block) as the unstroked engine. The increase in stroke is at the
> BOTTOM of
> the cylinder.
> 
> You might want a new head and manifolds if the stock parts on the stroked engine
> are substantially bigger in the ports and valves than the older engine..the
> stroker
> naturally wants to pull more air through the intake. Otherwise, if the head fits
> the block, it should work OK.
> 
> Compression is a function of the shape of the top of the piston, the combustion
> chamber space in the head, and the stroke. If nothing else is done, the stroker
> will have a good deal more compression than the stock. You might need a thicker
> head gasket, or be stuck burning racing fuel!
> 
> In case you're interested, compression is the ratio of the space inside the
> cylinder
> with the piston at TDC to the total space with the piston at BDC. You can
> measure this
> with a graduated cylinder and a funnel, by pouring liquid into the cylinder
> until
> it reaches the top of the spark plug hole in both cases. This is something
> best done on an
> engine stand, not in the car...If the total volume was 100cc (for example)
> and the
> TDC volume was 8cc, the compression ratio is 100/8, or 12.5:1.
> 
> Chuck Kuecker
> 
> ckuecker@mcs.net
> 
> '83 Scirocco
> '58 Ghia Convert
> '67 Bug
> '63 Bug
> '91 Vanagon


Hi Chuck,

Yep, right again.  I meant the head (why do I always think that's the
manifold?).  Anyhooo, thanks for the advice, this one's going in my
'save' box in mail :).

Steph
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