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The more I think about it, the more I want to turbo one of my cars, but want to ask the people in the know if I've got my head around it correctly, as I've never done a turbo set up before. My thoughts are as follows: Garrett T25 turbo Home made pipe to mount it to standard cast manifold, then home made exhaust from there back. New pipework from turbo to top of carb. Carb in question is off an early Daihatsu Charade turbo, so designed to be force fed & fits on my standard inlet manifold. Oil feed & return for the turbo-can I get away with a feed & return tapped directly into the sump, or am I better off taking a feed from the oil filter housing? Rising rate fuel pressure regulator & electric fuel pump, as I assume that my mechanical lift pump just won't be up to the job in hand & pressure needs to rise as it comes on boost? Not planning on running an intercooler for a start, just get it up & running, but if it doesn't go bang, I might fit one later on. Have I missed something huge, or am I about there? Only looking at running 6-8psi boost as form what I've read, I won't need to lower the CR on my engine at that. Thanks for your patience!   |
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Jun 27, 2012 11:59:06 GMT
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Most engines will run 7psi without modification. Would help if we new what engine youre thinking of though!
A feed from the oil pressure switch will be sufficient. Make sure the oil return enters the sump above the oil level.
Do inter cool it, now not later.
think about how to control your ignition. Bad timing will melt a piston double quick.
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Koos
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bortaf
Posted a lot
Posts: 4,549
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Jun 27, 2012 12:34:22 GMT
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You need an oil feed from a presurised feed not the sump or there will be nothing forcing the oil through the turbo, you are also going to need some way of backing off the timing when on boost' IME that more important than lowering the CR on a standard engine?
As above though, give us a chance by at least saying what engine it is !
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Last Edit: Jun 27, 2012 12:35:11 GMT by bortaf
R.I.P photobucket
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It's in one my my Starlets, so Toyota 5K.
Hadn't even thought about the ignition timing, so thank you for that, something I need to have a proper look into as it's still running a convention distributor. Is there usually a way they can be made suitable?
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Hadn't even thought about the ignition timing, so thank you for that, something I need to have a proper look into as it's still running a convention distributor. Is there usually a way they can be made suitable? go megajolt....much easier in the long run |
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[/quote]
go megajolt....much easier in the long run[/quote]
But I'm tight/skint so trying to do it as cheap as physically possible!
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Steve
Posted a lot
Making progress in small, easy to handle chunks of awesome
Posts: 2,038
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Cheap and turbo are not two words that go together chap  I'm currently in the process of building up a NA motor that I'm turbocharging and already a couple of hundred quid in and the engine aint even built up yet! still need to buy turbo, pipework and uprated injection parts so expecting to be close to a grand by the time the engine is in the car  Skimp on the basics and it will all go wrong very quickly |
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Jun 28, 2012 10:32:43 GMT
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I've got a good NA engine already in my other car. This is just sat in the shed doing nothing so thought it was worth a play. The engine was rebuilt about 200 miles ago so I know its a good one.
I'll ask some of the lads over in NZ as its a pretty common conversion over there without going to the extra expense of a megajolt set up.
Thanks for the help though
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sparkyt
Posted a lot
selling stuff
Posts: 1,767
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Jun 28, 2012 10:47:38 GMT
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Med do a retard unit for running a standard dizzy plus a turbo ..
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do as they used to do on minis when slapping a turbo on an A-series - weld up the dizzy centrifugal advance weights, and don't bother hooking up the vacuum advance
Fixed timing at least will help stop you melting pistons - albeit at the cost of slightly less ponies, and slightly less mpg
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You're like a crazy backyard genius! |
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bortaf
Posted a lot
Posts: 4,549
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If you left the vac pipe connected would the boost in the manifold not back the timming back off again ? or would it damage the vac modual?
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R.I.P photobucket
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it wouldn't do anything - as it's already going to be up against a stop - but it would cause merry hell once you took your foot off the throttle! lol
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You're like a crazy backyard genius!
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