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Originally posted by imperialdataThanks Tim. Why do they prefer R1’s or GSXR’s for twin BEC’s? Are they a particularly small lump?
Yup, physical size and gearbox output location suits mating up to the transfer box which combines the drive.
There are also some twin busa 4wd cars floating about though, so anything’s possible. One is currently for sale with 2x tuned up busa engines + nitrous. Bit of a monster by all accounts! [
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Can you explain the advantages of drysumping and how it is achieved?
Erm, not in much detail TBH.. Basically though becasue the car doesn’t lean in cornering like the bike does (and cos the engine sits N-S rather than E-W anyway) high speed cornering can cause oil surge. This then leads to starvation of oil from the pickup pipe and you end up running bearings and introducing your conrods to the outside world via the block! [
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Some engines seem particularly prone to this – Blackbird for one – and others seem relatively unaffected – like the Blade. Tendancy is to run drysumps on more expensive engines like the Busa, but not on the cheaper ones. Mainly cos the drysump costs IRO £1000 and you can get 2 cheap engines for that!
Halfway house is an accusump, but they can cause problems of their own it would seem, so best to stump up for full drysumping on a track car if you run either an expensive or an oilsurge-prone engine.