Bore and Stroke? | Ford Explorer - Ford Ranger Forums - Serious Explorations

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Bore and Stroke?

RedneckRambo

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1994 Explorer XLT
already searched the forum. does anyone know the bore and stroke of the 4.0L ohv engine?
 



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RedneckRambo

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anyone know how much you can bore it out to?
 






jd4242

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what year is the block?
 












jd4242

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Any power adders?.50 would be the max safe i think.ill have to double check tho.the first gen block is said to be able to bore out farther than the second gen.they make a stroker kit also.
 






RedneckRambo

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Any power adders?.50 would be the max safe i think.ill have to double check tho.the first gen block is said to be able to bore out farther than the second gen.they make a stroker kit also.

i havent done anything to it other than the airbox mod
 






jd4242

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If you plan on turbo,supercharged or nos i wouldnt go over.30
 












jd4242

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You wont gain much there.look more towards the heads and cam if you want power.or gears if the motor runs good.
 






RedneckRambo

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You wont gain much there.look more towards the heads and cam if you want power.

would machining the heads down a bit increase power?
 






jd4242

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Yea but being that its stock 93tm heads the crack and are bad design. Replace them with 95tm engine quest heads and they are better made and flow better.but that will take you to 10:1 compression and you would need to run 90+ gas
 






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