Speccing a single turbo for a 4.6 RV8

[pupp]

Right; next Q - anyone know of a good clamp in oil return adaptor? Thinking of something like a -10 fitting that will push through from the inside to the outside of the sump and be sealed and secured with a nut on the outside. I imagine someone will do something but have not turned up yet...?

[stevieturbo]

In otherwords a bulkhead fitting.

[Eliot]

Have a look through here:
http://www.thinkauto.com/plist010106gweb.pdf

I used two weld-on -10 fittings - welded from the inside to look neat:
http://www.mez.co.uk/dcam/DSCF0589.JPG

[stevieturbo]

Welding is ideal, but obviously you need the ability to weld.

bulkhead is just a drill job.. A Normal male-male fitting with a nut on the back would likely work too, but a bulkhead is safe as far as length of thread available goes.. Just cut off any excess.
Use a dowty seal to seal one side, or both.

[kiwicar]

Try Torques on Ebay, normally deliver the next day if ordered before about 3pm and are quite a bit cheeper than most.
Best regards
Mike

[pupp]

Thanks all. I did indeed mean something like a bulkhead connector... if I use a weld-on fitting it will fall off, guaranteed

Was hoping to find something that kept the lock nut on the outside just to minimise the potential for bits dropping in the sump in event of failure... will have a gander at the links etc

[pupp]

Ok, so now have the turbo to hand - BB Gt35 - I'm intending AN-4 feed and AN-10 drain; any merit in using an in-line filter such as the Torques offerings?

I'm pretty meticulous with oil and filter changes, and also use a magnetic drain plug - is the filter more of a risk than a benefit?

[Eliot]

where are you proposing to locate the filter? Feed or return?
You certainly wouldn't fit it to the return, as comes out very frothed up and wouldn't drain quickly enough back to the sump - this is the reason the drain pipe diameter on a turbo are 10-15mm id.

On the feed? - well if you are pumping dirty oil into the turbo, you have bigger problems on your hands potentially (i.e. knackered engine). I've not fitted one.
Stevie probably got more experience of the subject tbh.

[stevieturbo]

Ive never had a need to fit a filter prior to the turbo, although I guess if it's of suitable design and quality it would be fine.
BB turbos require very little oil....but because of this they have a small restrictor on the oil inlet. So in theory this could get blocked easier.

Ive never seen it happen though.

[pupp]

Jury's still out on the filter (would be in the feed line), as there seems to be very divergent views (gather Subaru fitted one OEM at one time then recalled cars to remove), so I'll park for now.

In the meantime, anyone any experience of PWR style barrel charge coolers? Seem comparatively expensive and need more plumbing and hardware but, potentially, good for packaging and efficient if maker's claims are credible. Think I could get a 5x10 unit pretty close to the plenum/throttle and avoid the vulnerability of a large IC in the nose with long pipe runs.

[stevieturbo]

Subaru never ran a filter pre-turbo. That said, when they started using AVCS which uses the same oil supply point, they did use a small mesh screen at the point where it left the head to supply oil to these parts.

So it was more to protect the AVCS gear than the turbo, although it's really not that fine a mesh anyway. Certainly nowhere near what an oil filter would do.


As for PWR. Ive yet to hear of any glowing reports about them. They are compact and seem to flow in terms of air, but cooling ability seems poor. Rating units based on HP as they and other companies do is also a nonsense.

If you do decide to use one, I would say to oversize it, and opt for a longer unit which should provide better cooling.

Normal air to air is simple and very cost effective though.

[pupp]

Ok, thanks... confess to being a bit wary of the air/air intercoolers out there; seems to be a lot of tat about - anyone come to mind that does decent 'universal' stuff that will flow well and be reasonably robust? Wanting to use 63mm pipework...

[stevieturbo]

Ok, thanks... confess to being a bit wary of the air/air intercoolers out there; seems to be a lot of tat about - anyone come to mind that does decent 'universal' stuff that will flow well and be reasonably robust? Wanting to use 63mm pipework...

TBH, yes the ebay stuff is poor. But for a low boost sub 500hp engine.....they represent excellent value, so it's kind of hard to dismiss them. £100 buys you an intercooler that will work well.
No "proper" unit will ever cost anywhere near that....and will it perform that much better ? At a lowish power/heat level, probably not.

Any of the typical 3" thick units, or better still 4" thick will work well.

Some very good info here

http://www.are.com.au/feat/techtalk/techtalk.htm

And an example. £69 + £8 postage ? You could never even have an end tank fabricated for that nevermind a complete unit.

http://www.ebay.co.uk/itm/FRONT-MOUNT-U ... 2ec635ed5b

Or something like this, these end tanks would be much better in terms of letting air flow through the core.

http://www.ebay.co.uk/itm/FMIC-FRONT-MO ... 2c63135a4b


If this is an actual genuine Greddy core/unit, it would be quite good.

http://www.ebay.co.uk/itm/High-Performa ... 4ab8ec54be

Or for an OEM quality with excellent end tanks. Buy a good used units. These will have good cores.

http://www.ebay.co.uk/itm/nissan-skylin ... 4d0a2a5528

[stevieturbo]

For air to water. This is a favoured design in the US. However...clearly it is a cheap chinese unit. So as to how effective or efficient these are, Ive no idea.
When it comes to cooling anything, more cooling area is always better. So when the unit is compact or small, there is a higher chance of a cheap unit not doing the task properly.

http://www.ebay.co.uk/itm/UNIVERSAL-WAT ... 2318f5d74b

An example of a proper one. Although again I still find it hard to believe units so small can really be effective.

http://www.precisionturbo.net/heat-exch ... --PT1001/6

[pupp]

Again, thanks - useful links.