Hey guys,

another question re my engine build

I am building another small bore, and I wish to stay under 1200cc.

Its a shame the use of Hillman Imp pistons takes it to 1215cc.

What pistons can I use (mini or non mini) to achieve the maximum cc, but staying under 1200cc.

My block is sitting here waiting to go in to get bored/honed, just need to know what to.

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I thing GR has 100 thou plus pistons for sale, but I have been know to be wrong.

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May the fork be with you.

Based on a quick calculation +0.100" should take a 1098 to 1185cc's.

<edit> I also recall GR having +0.100" pistons for 1098's

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"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina

Yep he does but unsure if he has stock? best to call

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Stop Licking the Dog...I Don't Care Who Started It

+0.100 flat to pistons from GR in my 1098 block





Just had them done - he should still have them in stock - give him a call

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

Is it me or has that block got too many holes in the top?

pure porn. thanks guys. before I call him, how much are they going to set me back? do they come with rings? who makes them?

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I'm sure they come with rings in the price but as to what that is I don't know - they were included in the total price of the assembly. Best ask him. GR has them made to his specs in Tiawan. I had to wait nearly 2 years for them as his first shipment went 'missing' and as by world scale his order was a small one they put the re-run to the bottom of the pile

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

Ah thats no good at all. was hoping to get the motor together for next years meets. Ill give him a call and find out. thanks mate.

what compression are you running?

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I think they are around $275 a set. GR pistons are made in Taiwan, (Hypatecs are too). These come with a Nippon ringset, they are good. Better than Hastings.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I'm sure he has them in stock - as part of the order went to MS in the UK and needs them for his own stock as well.

Haven't worked out compression yet - running 295 head hence the flat tops.

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

cheap. ill ring tomorrow to order my set.

thanks, once again for everyone's comments.

I was planning on using a 940 head, would the flat tops still work with the modifications to the block?

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Yes.
But your C/R will be pretty high unless you enlarge the chambers heaps, stock they are only 21.4cc.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

hey doc.

thats fine, I was after a high c/r, and the head will be quite modified.

Ill keep you all posted.

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he said I shouldnt be running a 940 head. stick to the 202 instead.

He has a lot in stock, so when I get back from my travels ill get the missus to get me some for Christmas.

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