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Location: Sydney, Australia
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2.3 litre - how to?
i went to watch some historic racing on the weekend. one guy was running a 911ST replica with a 2.3 litre motor.
anyone know what crank/rod/barrel etc combo results in a 2.3?
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Cheers, Ryan 1969 911E (historic racer) 911ST replica (tarmac rally) |
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06-27-2005, 09:51 PM
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Hi Ryan
My tangerine 911 had a "2.3" - 66mm crank with 85 mm JE pistons in bored Nickasil jugs. Actually closer to 2.2 - 2245cc if I remember correctly. P.S any idea if I changed my red car back to an ST look - would it be eligible for historic racing with its 72 2.4E motor or do they have to be all numbers matching to be eligible? Robert |
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06-27-2005, 10:35 PM
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hey rob
where the 85mm pistons a custom order? there are 2 main historic classes for 911's. the first is group S (Sa, Sb & Sc divided by age). group S requires cars to be all original (ie. no replica's) and is dominated by MFI 74/75 2.7 Carrera's. The odd Carrera3.0's do ok also but are a bit limited by having to run CIS - and thus can't run hot cams etc. I think a 2.4E would do ok in sub group Sb - at least you could compete in the sub group... your red car would have to fully match its chassis no. to get a group S logbook the other option is group Nc - for historic touring cars that ran back in the day. replica's are allowed but the only 911's that ran in the day were 2.3 ST's. there was one group N 911 at the historics on the weekend - it went well but has to contend with mega hp camaro's etc. your red car would need to be a 2.3 and early bumpers to run as an ST check out http://www.hsrca.org.au/ for more info
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Cheers, Ryan 1969 911E (historic racer) 911ST replica (tarmac rally) |
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06-27-2005, 11:30 PM
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Ryan
Thanks for the info. I got the 85mm pistons from EBS - I think pretty standard issue for them. Robert |
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06-28-2005, 01:15 AM
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rob
and the barrels were stock 2.2 bored out by an extra mm?
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Cheers, Ryan 1969 911E (historic racer) 911ST replica (tarmac rally) |
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06-28-2005, 04:16 PM
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Yup - but std. 84mm Biral (not Nickasil mistakenly typed in my first reply), bored to specs supplied by EBS.
Robert |
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06-28-2005, 04:26 PM
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Ryan,
was it a newly builty 911ST running or was it the one that has been around for a while. Michael |
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06-28-2005, 05:44 PM
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mike, its a new one - silver - this was its 1st race meeting
there's some pics on the aussie pelican board
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Cheers, Ryan 1969 911E (historic racer) 911ST replica (tarmac rally) |
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06-28-2005, 08:00 PM
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