1200cc vs 1260cc

[steiny]

Could someone explain the differences between a stock 1200cc engine and a 1260cc.

Thanks Steiny

 

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1200cc (actually 1198 to be technically correct) is the stock engine size.

You can bore the stock block to accept 78mm pistons which will give you a displacement increase so you end up with a 1260cc engine.

 

[satariel666]

and 1294cc venture cases.

 

[Redbone]

For the bigger bore what does that do for power delivery/ torque? Lower/ upper RPM ranges?

 

[wildweasel_pt]

For the bigger bore what does that do for power delivery/ torque? Lower/ upper RPM ranges?

Increases all of that... :biglaugh:

 

[twistedmax]

:ummm: Im guessing the difference is about 8-12 HP, one of my stock 1200's was 115-117hp and my current 1260 runs between 126-128 hp.:clapping: better burn outs:clapping: Im shooting for over 200HP out of my next one:biglaugh:

 

[one2dmax]

It's a virtual linear change. 10% increase in bore is a 10% increase in power and torque given compression and other things equal.

Sean

 

[steiny]

Now from a cost factor, Is it worth doing this (to a motor that has no issues) to receive that extra 10% hp . I know some would say every bit is well worth it :biglaugh:. What might the con's be to doing this.

Thanks Steiny

 

[wildweasel_pt]

Its a good solution for tired smoking engines...

 

[one2dmax]

A better cost scenario would be one of my 1300 conversions and leave your engine intact.

Sean

 

[dannymax]

Now from a cost factor, Is it worth doing this (to a motor that has no issues) to receive that extra 10% hp . I know some would say every bit is well worth it :biglaugh:. What might the con's be to doing this.

Thanks Steiny

I wouldn't build on a good motor, a smokey one, or otherwise one needing teardown, absolutely, but not a good one. I'd go with Sean's 1300 first.

 

[RagingMain]

i wouldn't build on a good motor, a smokey one, or otherwise one needing teardown, absolutely, but not a good one. I'd go with sean's 1300 first.

+1