My chinacharger project
#1
My chinacharger project
Ok gentelmens, I bought a Godspeed gt25 (to replace a M45 JRSC) that has a oil floating bearings. Must I put a restrictor in the feed line or this is only for the ball bearing units?
Another question is that while both, the turbo and the manifold had a T25 flange, the hole in the turbo is slightly smaller than the one in the manifold, do you think is a good idea to do some gasket matching porting here in order to improve the spool?
Thanx,
Ben.
Another question is that while both, the turbo and the manifold had a T25 flange, the hole in the turbo is slightly smaller than the one in the manifold, do you think is a good idea to do some gasket matching porting here in order to improve the spool?
Thanx,
Ben.
#2
Boost Pope
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Posts deleted. No newb bashing on this one, ok? He's asking intelligent questions using proper grammar and punctuation, and has obviously done some homework.
You probably do not need an oil restrictor. If you find that you are pumping oil past the shaft seals then I was wrong.
I can't say I've ever heard of anybody port-matching the turbine to the manifold, but then I don't think I've ever seen anybody observe this particular problem. Couldn't hurt, so long as there's sufficient iron around the area you're cutting into. You don't want to thin the wall too much.
You probably do not need an oil restrictor. If you find that you are pumping oil past the shaft seals then I was wrong.
I can't say I've ever heard of anybody port-matching the turbine to the manifold, but then I don't think I've ever seen anybody observe this particular problem. Couldn't hurt, so long as there's sufficient iron around the area you're cutting into. You don't want to thin the wall too much.
#3
I do not have a restrictor on my T25 but its a garrett so who knows. I think you're fine though without one. Ball Bearing turbos certainly do need a restrictor.
I haven't had that problem with any of the garrett turbos i've built manifolds for. This is an interesting observation. I think people with chinachargers might want to take a look and see if they've got this same issue. Port match that sucker for sure and please post before/after pics if you can.
I haven't had that problem with any of the garrett turbos i've built manifolds for. This is an interesting observation. I think people with chinachargers might want to take a look and see if they've got this same issue. Port match that sucker for sure and please post before/after pics if you can.
#7
I am currently going through a rebuild after not following forum suggestions.
15 psi with 10@1 cast pistons with an EBAy chinacharger resulted in 3 bent rods, no detonation.
Just make sure you always have fresh oil as you dont want that restrictor to get clogged whatsoever, and the hole is tiny tiny ...
15 psi with 10@1 cast pistons with an EBAy chinacharger resulted in 3 bent rods, no detonation.
Just make sure you always have fresh oil as you dont want that restrictor to get clogged whatsoever, and the hole is tiny tiny ...
#10
Boost Pope
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I would start out with no restricter. If you find that you are having problems with oil being forced past the seals, then you can add one. If not, it's better to run without.
#11
Ok Gents, so far, based in your inputs here, I will start without restrictor with AN2 for the oil feed and AN10 for the drain.
Also I'll port the turbine inlet to match the manifold as is a very small amount of offending material to be removed, so this won't jeopardize the structural integrity of the case and the flow will be improved. Tomorrow I'll post some pics so you'll know what I'm talking about.
Thank you very much for your help.
P.D. Attn. Leatherface: sorry for my answer to you. I've seen your V-Intercoler post and I'm very impressed with your talented work. Congrats.
Ben.
Also I'll port the turbine inlet to match the manifold as is a very small amount of offending material to be removed, so this won't jeopardize the structural integrity of the case and the flow will be improved. Tomorrow I'll post some pics so you'll know what I'm talking about.
Thank you very much for your help.
P.D. Attn. Leatherface: sorry for my answer to you. I've seen your V-Intercoler post and I'm very impressed with your talented work. Congrats.
Ben.
Last edited by miatasc; 08-12-2010 at 04:18 PM.
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