Andrew
I agree with Brad, after I did some measuring I would consider even 89mm
pushing it. It depends on operating range, cylinder pressures,
rod/stroke ratio etc. They way I see it is on a very hi-po reliable L18W
engine any
more than ~88 and you need cylinder liners and then as Brad has
mentioned
you may run into cooling problems.
If your planning to turbocharge it I would consider 88mm the absolute
max depending on boost, 87mm sitting happy with me.
Craig.
Brad HALLETT wrote:
>
> I wouldn't advise going over 89mm in an L18W, although I have seen them at
> 90mm they have problems with cylinder wall cracks due to flex at high
> stress. I am boring my current block to 88mm (when I get the pistons made
> up) which should have no flex problems I hope. Z22E pistons and L16/24
> rods are a good combo, and converting to Chevy bolts is not difficult.
> Datrats has a set of 87mm arias forged pistons with 29mm compression ht and
> 3mm dish which would be a good combo with L13 rods for hi-po turbo, or
> L16/24 for normal turbo use. I am not a turbo freak so maybe some of the
> other blokes could assist with the calcs better than I.
>
> Regards
> Brad HALLETT
> http://www.powerup.com.au/~bhallett
>
> Proudly Endorsing:
> ...DATRATS...
> http://203.33.35.34
> Datsun Dedicated
> For Nissan Motorsport Components
> Professional Budget Priced competition equipment
> Contact Errol SMITH
> email: [EMAIL PROTECTED]
>
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