Would displacement increase by using oversized pistons?
#1
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Would displacement increase by using oversized pistons?
oversized pistons...... just wanted to know if it would increase at all?
and also...any advantage to using oversized over standard size?
and also if you could explain how?
Thanks
and also...any advantage to using oversized over standard size?
and also if you could explain how?
Thanks
#2
Hi,
I believe displacement is bore x stroke. Bigger pistons have a bigger bore, so you are increasing displacement slightly. Generally, more displacement will shift the TQ curve up. Of course, you're not adding that much displacment with oversize pistons. Maybe you'd be a 2.04 liter? I'm sure someone can chime in with actual specs.
The other thing to consider is your cylinder walls. Sometimes you need oversize pistons since the walls are worn and need more than a hone. When I had by Integra GSR built up, I had stock bore pistson put in, but if I were to do it again, I would probably go oversize hoping it would help with oil consumption and whatnot.
Thougths or corrections?
FB
I believe displacement is bore x stroke. Bigger pistons have a bigger bore, so you are increasing displacement slightly. Generally, more displacement will shift the TQ curve up. Of course, you're not adding that much displacment with oversize pistons. Maybe you'd be a 2.04 liter? I'm sure someone can chime in with actual specs.
The other thing to consider is your cylinder walls. Sometimes you need oversize pistons since the walls are worn and need more than a hone. When I had by Integra GSR built up, I had stock bore pistson put in, but if I were to do it again, I would probably go oversize hoping it would help with oil consumption and whatnot.
Thougths or corrections?
FB
#5
Originally Posted by 11secEVO7
yeah what ur saying makes alot of sense.
but wouldnt a downside be that the cylinder walls may be thin now
but wouldnt a downside be that the cylinder walls may be thin now
Other input?
FB
#6
EvoM Staff Alumni
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Depending on what your doing with the car, I'd only go one factory step up or so in bore size, leaving room to overbore again in the event of a mishap. There are other benefits to opening up the bore in the block. Most importantly it allows you to "de-shroud the valves" to a greater degree. The Indy boys run a very short stroke with a nice size bore for this among other reasons. Of course to take the most advantage of a larger cylinder bore on your block, you need to have the combustion chamber opened up to match in the head. There is a wealth of information on this subject all over the web.
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