This is the renault 5 gt 1.4 litre pushrod engine which has a lesser head than the A series nissan with little valves and lil round ports non crossflow but capable of 430hp with 50psi!!!! As commonly tuned in England.

Can the A series benefit from such sleeves? or will it weaken it?

http://cgi.ebay.co.uk/Renault-5-GT-Turbo-engine-no-tappet-or-knocking-noise_W0QQitemZ4633030375QQcategoryZ10410QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.co.uk/Renault-5-GT-Turbo-Cylinder-Head_W0QQitemZ4631876547QQcategoryZ10410QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

It would defintely weaken the block!
That I believe is refered to as a "wet" sleeve,
and the A-block was not designed to be sleeved like that. I had to sleeve a block once, but nothing as thick as those!! the coolant runs in those gaps, whereas the A-block has passages.

As a matter of interest, what is the maximum amount of boost you could put through a purpose built A series, whilst still retaining some longevity?

longevity is beheld in the angle of the right ankle.

I would be interested to know the ultimate psi of a built a12 also. here is a similar thread
Thread link

Quote:

I believe it's more an issue of what is the maximum number of dollars that someone is prepared to spend on an Aseries.
With ALL the clever gear, I'd say 20+ psi.

I think the A series could handle a wet sleeve conversion. The legendary Honda H22 is usually converted to a wet sleeve and its an alloy block which handles ridiculous boost. Once you have good seating on billet sleeves the head seals the lot specially with stronger head bolts (somewhere on this forum I saw someone using the stronger bolts). The problem is finding someone to do an accurate job of CNCing the block for the stronger sleeves.
Smaller 75mm bores will make 1431cc but will help with thicker billet sleeves which is necessary for 40-50psi.
Billet Stainless sleeves will cause problems to the rings but coating the rings will help with them disappearing.

One other thing is that the 82mm stroke is not an issue with revs. The H22 has a 90mm stroke and revs to 9k with boost and the F20/22 rev to 9k with 86mm stroke.
With boost 82mm should be fine on the A series for 7.5k easily

Nissan sold dry sleeves for the 1200 ...

bump

bringing this thread back up,

Would it be possible to get 80mm bore using offset wet sleeves?

Also a modded e16 crank (90mm stroke) for around 1800cc?

Where is Feral when we need him