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Mar 12, 2016 17:41:25 GMT
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Looks like ive bought a bedford, 2.3 slant 4.
I know the vans have low comp dished pistons and you can swap them for car flat top pistons.
My question is, what are the dissadvantages? It will make more power so presumably must use more fuel but I cant see how it could.
Cant see why torque would suffer either.
So why did they fit low comp anyway? Just so the engine is low stress?
Id like more power but don't want to harm economy etc too much.
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Mar 12, 2016 19:00:04 GMT
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Hi, Low compression is for lower grade petrol so lower power and less stress. Higher compression will give more power, but depending how you use that power will affect fuel consumption. Because it's more powerful means you don't have try as hard to make progress along the road. As always fuel consumption is down to your right foot. Sometimes low compression engines have a different head rather than pistons so check first.
Colin
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Mar 12, 2016 19:03:23 GMT
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The Cf's have dished pistons.
head is the same as car head I believe.
Alot depends if I can even find 2.3 slant 4 pistons anyway!
Hadnt thought about the petrol quality thing, there set up for 2 star!
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Mar 12, 2016 20:37:37 GMT
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Low compression also means they are more suited to running boost either from a supercharger or turbo. But yes it was more to give more tractability and the option to run on 2 star
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Mar 13, 2016 21:49:03 GMT
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as for pistons, wasnt the 2.3 slant the basis for the lotus engine? and the engine in chevvete hsr's and that sort of stuff?
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Mar 13, 2016 22:05:51 GMT
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Yes.
Not too many shared components with the lotus though.
I did think about putting an elite engine in it, or fitting the twin cam head (apparantly needs some oil and water way mods) but not sure ill bother now.
Will swap the pistons out if I can though, waybe bodge some twin carbs on, but as I say, don't want to harm economy too much.
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Mar 14, 2016 21:21:10 GMT
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you may find someone building a race or rally car thats rebuilding there engine and putting in shiny billet items and have theres spare?
that or you may fall lucky and find some new old stock ones?
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Mar 14, 2016 21:30:02 GMT
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I havent collected the van yet. Once ive got it ill pull the head and check/measure the bore.
Ive seen oversize pistons, and I don't mind over boring, so I'm sure ill find something.
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Mar 14, 2016 22:51:13 GMT
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I would be tempted to run it for a bit first - the 2.3 in the CF's was supposed to go pretty well even in standard form, economy isn't a known strong point though  |
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