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94mm to 96mm - is it worth it?
Purple Martin - February 2nd, 2004 at 12:50 PM

Hi, I'm looking at options for a bit more power as I'm about to rebuild my currently stock 2.0L motor (without spending too much!).

One option seems to be to use 96mm pistons/cylinders instead of the stock 94mm ones. Apparently the 96s are bolt-on: no machining required.

BUT that would give a volume increase of only 2.1% - am I really going to notice any difference from such a small change? Do you think it is worth the cost?

Bizarre - February 2nd, 2004 at 12:56 PM

I will certainly be interested in your findings!

First of all i dont think you can "buy" 96's. As far as i know they are bored out 94's. So i guess you save on the new cylinders but then you need 96 pistons.
Yep - the Americans are big on this one.

I reckon if you wanted to do anything i would go
1) Weber IDF's
2) Cam
3) head work

Tell how it goes

mnsKmobi - February 2nd, 2004 at 01:19 PM

Quote:
Originally posted by Purple Martin
Hi, I'm looking at options for a bit more power as I'm about to rebuild my currently stock 2.0L motor (without spending too much!).

One option seems to be to use 96mm pistons/cylinders instead of the stock 94mm ones. Apparently the 96s are bolt-on: no machining required.

BUT that would give a volume increase of only 2.1% - am I really going to notice any difference from such a small change? Do you think it is worth the cost?


Actually it's about 4% difference b/c it changes the area not just the width. I would only consider it if the cylinders require reboring anyway from wear b/c I suspect it will make stuff all difference.

Unfortunately, getting extra power without spending much money seems to be almost a contradiction in terms! However, a couple of things to consider are:
- balancing all the moving bits.
- removing excess weight. There are huge weight savings to be made if you've got an original 70's chipboard camper like mine!
- reco the peripheral bits when you reco the motor - distributor, carbs, alternator, etc.

Andy - February 2nd, 2004 at 01:52 PM

I managed to track down 95mm for my re-built, but don't expect it to make any noticable change in torque or HP (motor is stock), and don't think 96's will be noticable either. I only did it to re-use my worn barrels.

Similar to what blue says you will be better off spending money on carbs and exhaust if your motor is otherwise fine.
If as you say for the re-built your up for splitting the case also look at head work and cam etc.

If you want to go all out I think they can be taken out to ~3L.
:thumb