bobz
Part of things
Posts: 343
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Dec 26, 2006 23:58:48 GMT
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I was wondering if it's OK to put a turbo off a diesel onto a petrol engine. From what i've read, there's ppl who recon they've used them, and those that say that you shouldn't use them as the petrol ruins the seals. Now i don't pretend to know a lot about turbo conversions, but............ people who say that a diesel doesn't have a throttle so that can cause problems. How? Surely the actuator measures air pressure in the inlet manifold, not the actual 'throttle' position? And as for the seal argument, you just wouldn't have 'neat' petrol (unless the fuel mix is wrong) or diesel for that matter entering the turbo unit. And besides, I work with a lot of Diesel fired stuff in my job, and the Sulphur deposits left by the soot in diesel, is an awful lot more corrosive to seals than petrol ever is. Can anyone help shed a bit more light on this subject for me please?  Thank you |
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Don't plan anything, it'll start raining!
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From what I can remember from the PPC article on turbo's, petrol engines have higher exhaust gas temperatures than a diesel engine and this kills the diesel turbo after a while.
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There is a lot of talk about diesel turbos crapping out on petrol engines, but i have seen no evidence to prove it.
I have used a GT series turbo on a petrol engine and had no problems. The GT series turbochagers have exhaust wheels cast in inconel, they are good for 1050C by garrett specifications.
Earlier T series turbos are not as good with heat, but these problems should only really arise under very lean burn conditions, not something your going to see in a performance tuned engine.
Cheers
J
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I'd say the compressor maps would be all wrong for a start.
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Dec 27, 2006 10:07:33 GMT
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I'd say the compressor maps would be all wrong for a start. What I don't understand is that on one side, you have people insisting that turbocharging is a very difficult science....Yet on the other hand, you have people literally bolting an approximately-sized turbo onto a Mustang or Civic using scaffolding tube and making big power... *n |
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Top grammar tips!
Bought = purchased. Brought = relocated
Lose = misplace/opposite of win. Loose = your mum
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Dec 27, 2006 10:19:23 GMT
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I'd say the compressor maps would be all wrong for a start. What I don't understand is that on one side, you have people insisting that turbocharging is a very difficult science....Yet on the other hand, you have people literally bolting an approximately-sized turbo onto a Mustang or Civic using scaffolding tube and making big power... *n Like me.....i've bolted on a garrett gt28rs from a s15 silvia on to a high compression high revving mitsi 2.0 v6 and i'm not getting the best from it.....power is flattening off at 6300 rpm whereas pre turbo it made full power at 7800 rpm. I've been told that the turbo is probably too big as it's used to boosting at about 14psi but on mine it's only boosting 6 psi. I think if i used the t25 from the s12 silvia it would work better as that ran at 7 psi. What i'm trying to say is i think you're better off starting with something similar in the first place,so if you're turboing a petrol car,choose a tubby off a similar application. |
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Dec 27, 2006 10:20:08 GMT
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That is a very good point penski, I think it all depends on what you are looking to achieve. You could aim for factory driveability with boost coming on low down with little or no lag, or you could put any old turbo on and have boost arriving 2000rpm before the red line and hitting so hard it makes you laugh every time! Horses for courses  J |
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Dec 27, 2006 10:22:12 GMT
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Hongkong, that sounds like a restriction somewhere, most likely the exhaust. Either that or its detting like crazy making the ECU pull loads of timing out?
What is the set up?
J
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Dec 27, 2006 12:37:25 GMT
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Hongkong, that sounds like a restriction somewhere, most likely the exhaust. Either that or its detting like crazy making the ECU pull loads of timing out? What is the set up? J I am actually looking at the tubby up-pipe at the moment where the front and rear bank join,i think that is possibly too small,and now you've mentioned the restriction.... It's definately not det,ign and afr are spot on. It's an intercooled single turbo running off both banks (v6) on a 2 x 3 into 1 into 1 set up.Fuel and ign is controlled by a microtech lt-8 ecu.It peaks at 6 psi and holds at 5 on a standard 10-1 comp engine that red-lines at 8250rpm.....it'll hold boost right until the limiter and it's on full boost by 3k. |
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