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Alpine R8 GT Turbo Too?

Another question, What is the best source for a C1J oil pump? Mecaparts sells an uprated pump for a C3J, but I've read that it won't provide enought pressure for the turbo motor. True?
 
The Blocks are basically the same, however the turbo motors have a High capacity Trochoidal or Holbourn Eaton type pump. This is better than the standard gear pump, however the prices are a bit eye watering and the GT turbo pump needs a GT turbo Sump. You need to find/use a Gordini turbo or T1/ T2 pump. The actual pump is the same , but the pickup (part of the pump casting) is different. They are interchangeable though.
If it was easy, everybody would do it.................
 
Thanks Steve, another important bit of info. To paraphrase you, "if it was easy (and cheap), everybody would do it!"
 
Personally I wouldn't use the GT turbo sump it is designed for a reclined, transverse engine. It's not great bolt upright in a fore and aft position, like in the back of an 8. Incidentally Bob you will need to correct the inlet manifold angle and turn the carb round to get the mainjet in the correct orientation. Or find a 12 or 18 or fuego 1400 inlet manifold. If it were easy ..........
 
2 main ways. 1 if you have access to a good alloy welder cut the carb flange off the manifold rotate, correct angle and reweld. Paul did have a manifold that this had been done on, but it was misplaced, or thrown out, so we went with my original method which was to machine the carb flange to flatten it, then make a spacer to allow rotation of the carb. I can't weld Aluminium, but I can turn and mill it.
 
Personally I wouldn't use the GT turbo sump it is designed for a reclined, transverse engine. It's not great bolt upright in a fore and aft position, like in the back of an 8. Incidentally Bob you will need to correct the inlet manifold angle and turn the carb round to get the mainjet in the correct orientation. Or find a 12 or 18 or fuego 1400 inlet manifold. If it were easy ..........
I just looked at the sump on my C3J donor motor and it has an inclined bottom similar (identical?) to a 5GTT. Also, the current motor in my R8 has an R5 Alpine head on a C3J block with the same inclined sump. So, what's wrong with using the inclined sump with a 5GTT oil pump? And might my C3J sump be identical to a 5GTT?

I have a sump from a US Lecar and it has a flat bottom. However, it has a much smaller volume than the C3J sump.
 
Bob if the parts came from a MK2 5 or 9 or 11 then they will be more or less the same. Would be worth checking what oil pump you have. Using the MK1 5 bits is more compact, gives better ground clearance and does not leave oil behind in the sump at change time.
 
Bob if the parts came from a MK2 5 or 9 or 11 then they will be more or less the same. Would be worth checking what oil pump you have. Using the MK1 5 bits is more compact, gives better ground clearance and does not leave oil behind in the sump at change time.
All the oil pumps I have are the same dual-gear type. I could use the MK1 sump in my turbo build, but a 5GTT turbo oil pump wouldn't fit in it, correct? So I still need a Gordini turbo with the different lower section. I'm confused.
 
It's looking like the 5gt turbo oil pump would work with your existing sump. Beware that there are 2 gear pumps being sold as Get turbo pumps the MK1 5 pick up does fit onto the GT Turbo pump. @paule78 actually did these mods to the 8, but didn't write it up in the thread, which is a pity cos a couple of pics are worth a thousand words sometimes
 
It's looking like the 5gt turbo oil pump would work with your existing sump. Beware that there are 2 gear pumps being sold as Get turbo pumps the MK1 5 pick up does fit onto the GT Turbo pump. @paule78 actually did these mods to the 8, but didn't write it up in the thread, which is a pity cos a couple of pics are worth a thousand words sometimes
Good news! Now I need only find a rebuildable 5GTT pump instead of a much rarer R5 Alpine Turbo pump. On with the search ...
 
Now I'm shopping for a new wastegate actuator for my T2 turbo. The internet says the stock actuator is set at 0.7 bar (10.3 psi). Is this value correct?
 
Now I'm shopping for a new wastegate actuator for my T2 turbo. The internet says the stock actuator is set at 0.7 bar (10.3 psi). Is this value correct?
Yes thats correct. I've got one from Forge motorsport and it can be tuned to your own needs.
 
I'm looking for oil feed and drain fittings for my rebuilt T2 turbocharger so I can make my own hoses. I can't use 5 GTT hoses since my setup has the turbo mounted to the side of the motor.

IMG_0390s.webp


Here are photos of the drain and feed ports on the turbo. The fittings I need seem to be some type of metric male inverted flare. I can't find anything like these on the web. Any source/s for fittings like these oddballs (at least in the US) are greatly appreciated.

IMG_0382s.webp
IMG_0383s.webp
 
I found fittings for the oil drain and feed lines. The feed fitting is 1/2-20 inverted flare and the drain is 7/8-18 inverted flare. I don't know if these specs are the same in the UK.

Does anyone know the size of the restrictor in the oil feed line?

Also, can I use the oil fitting on the block near the oil filter to feed the turbo instead of the fitting at the flywheel end?
 
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