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Rb Custom Stroker Pistons

GTRNUR
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GTRNUR Grand Master

GTRNUR

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Hi all,

I have a set of CP 87mm custom design pistons that are setup for use in a stroker motor. There are a lot of possabilities with these pistons. A few of these that are easy to achieve would be:

RB28 stroker:

77.7mm stroke, Rb26 Stock length 121.5mm rods, 1mm head gasket, 8.11:1cr (64cc stock head), 8.34:1cr (62cc shaved head)

Brian Crowler RB28 Stroker:

79mm stroke crank, Rb26 Stock length 121.5mm rods, 1.6mm head gasket, 8.23:1cr (64cc stock head), 8.46:1cr (62cc shaved head) (0.65mm positive deck height)

RB30 options:

RB30 cranks up to 93mm can also be supported with a stock length rod and a zero deck height. 94 would be a 0.5mm positve deck.

If you wanted to do something with offset grinding an RB30 crank and using 19mm GTiR sized journals, and 87mm stroke with a 6.125" rod would also fit nicely. I can make a crank to suit if this is something that interest you. SR20 rod journals remove about 50-75 grams of recipricating mass from each rod, and about 50 grams from the crank.

Full specs of the pistons are:

87mm bore

28mm compression height (32 is standard)

5cc RB26 Dome profile

21mm wrist pins

5.5mm crown thickness

These were a custom piston I had made for an early design of my open deck engine, but were never used due to a design change. The only time the packaging has been opend has been to photograph them.

Cost me $1500 to have made.

Will sell for $950 delivered in Australia. Also open to offers for swaps.

PM me if you need more detail.

Ph: 0434 147 478

Cheers,

Ian

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