Most modern cars have watercooled turbo bearing housings anyway, don't they?
Also the problem with hot turbo/no oil flow (ie motor turned off) is not that the shaft keeps spinning unlubricated as much as the oil that is in the bearings becomng burned, turning to bits of carbon and clogging passages, scoring shafts and so on .
it's not a bad thing till you throw a KLR into the mix.
those cheap ass bitches can do anything with ductape.
(PostalDave on ADVrider)
So from a performance point of view what would be the best turbo combo ?
My thoughts would be shot of NOS to spin up a Turbo nto it's working range , on demand methonal injection to stop detonation on full boost (rather than backing off ignition timing). Water to air intercooler and a air ram cold air box.
Last edited by Mooch; 12th March 2012 at 19:27. Reason: one day I will be able to spell
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Water cooling seems to be uber common, kind of annoying when looking for the right turbo for the bike too as I'd like ball bearings and small, already a limited choice and don't really want to run water pipes.
That makes sense to me.
Sounds like a good plan
Variable vale timing and lift helps a shit load too, along with a variable vane turbo
hehehe... ok my turn, you lot going on about turbo's still spinning after an engine is shut down, well think about it, it only spins due to exhaust gasses flowing through it, stop the gasses and the turbo stops... if the turbo was still to spin after an engine was shut down then were would the air its compresing go? cant go in the engine cos its not going simple as there is only one way in and one way out for the gasses as soon as they stop flowing the turbo stops spinning.
Thus why we use homo fluff off valves (actually common oem fitments mostely with diesels but quite due to them being vented into the exhaust or manifold)
When the engine revs drop during a gear change so does the turbo, it then needs to spool up again this causing a drop in power... so a blow off valves releses the presure going into it allowing it to spin freely and maintaing reves till the next gear is selected and the engine revs raise.
If a blow off was to open when a engine is shut down the yes the turbo would keep spinning.
Cos the turbo does stop spinning any oil in it would fry on the spot, hence the need to do a few revolitions to allow cooler oil through it that has just come from the oil cooler.
daa daaa... how'd I do
cheers DD
(Definately Dodgy)
Like I tell my kids, look with your eyes, not with your hands :-)
When I bought the Triton I had the salesman try to tell me you didn't need to cool the turbo because the intercooler did that, had to get one of his mechanics in to set him straight.
The handbook even states that the engine should be idled after heavy load to cool the turbo, it doesn't say how long though.
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