Transaxle cooler - -8 or -10?

[Alex]

The transaxle cooler (Earls) came with -10 fittings. However, from looking at the Ricardo, it looks like in the in/out of it are -8. should I just use -8 hose from the transaxle to the cooler, or should it be -10? I'm not really seeing the point of routing the -10s since I get drawn back to the fact the in/out on the transaxle itself doesn't appear to be -10?

edit: Unless I'm mistaken the Setrab units for F-GTs use -8?


edit 2 : Also, does the orientation matter? For example, if both in/out fittings are pointing straight up, is this the same as if I turned it 90* so 1 fitting is at the bottom, 1 fitting is at the top? (I believe the later option is better?)

 

[Rich E.]

Can't flow any more than the smallest hole will allow. As far as orientation, the more straight the line is the better but in a real world that usually doesn't happen, placement wise. If you can, 90's with a gradual bend are less resistant than the short, hard 90's.

 

[Dave Deerson]

I used -10 from the trans to the pump. Then -8 everywhere else.

 

[Alex]

Can't flow any more than the smallest hole will allow. As far as orientation, the more straight the line is the better but in a real world that usually doesn't happen, placement wise. If you can, 90's with a gradual bend are less resistant than the short, hard 90's.

Maybe I wasn't clear, but what I meant was if you have the in/out pointing upwards

vesrus sideways

I was reading some threads that suggested the later was better (oil coming in the bottom then out the top) was overal cooling performance?

 

[Ian Anderson]

Maybe I wasn't clear, but what I meant was if you have the in/out pointing upwards

vesrus sideways

I was reading some threads that suggested the later was better (oil coming in the bottom then out the top) was overal cooling performance?

Wrong way round I'd say In hot at top - out cold at bottom. If not many million cars on the roads have their water radiatirs in !upside down"

Mount at top and when you change oil you would have to unbolt cooler and turn over to get all old oil out the system

Ian

Ian

 

[Randy V]

What Ian said...

Also - I am planning on using -8 on mine and that's the size ive used in the past on other racecars without issue.. Would be no harm at all running larger (if your oil cooler has larger ports) - just not needed in my opinion..

 

[Alex]

Wrong way round I'd say In hot at top - out cold at bottom. If not many million cars on the roads have their water radiatirs in !upside down"

The f-gt guys seem convinced in-bottom/out-top is the most effective?

edit: however, the oem ford racing one recommends in-top/out-bottom (the opposte)

Also, thinking back to my cobra's rad, it's in at the bottom, out at the top ...

Would be no harm at all running larger (if your oil cooler has larger ports)

Other than the ... "fun" ... of routing big thicker hoses around, lol

 

[Paul Osborn]

The f-gt guys seem convinced in-bottom/out-top is the most effective?

edit: however, the oem ford racing one recommends in-top/out-bottom (the opposte)

Also, thinking back to my cobra's rad, it's in at the bottom, out at the top ...




Other than the ... "fun" ... of routing big thicker hoses around, lol

Is the oil going to be in there long enough for this to make that big (±5°?) of a difference?

It doesn't seem likely to me, but I don't know.

 

[Dave]

Alex, the oil is under pressure and the cooler is small enough that it won't make a difference one way or the other which way you orient it. With larger heat exchangers, it "may" make a difference but I've yet to see or read anything (not that I have exhaustively researched the sublect) convincing enough from either standpoint.

Unless you have ground clearance issues, which I doubt you do, just orient the cooler so that it is easily accessible, easy to drain, and easy to plumb, i.e. fittings on the side or bottom.

 

[Jack]

Alex, either AN-8 or AN-10 is fine. Either would be sufficient. The orientation really does not matter as long as the fittings are accessable, and your plumbing routing and
ease of drainage are the only concerns. I'm running two Setrab coolers with top fittings and AN-8 lines one for engine oil and one for gearbox oil. Fill up those side vents!

 

[Alex]

Fill up those side vents!

That's where he's going

 

[Fran Hall RCR]

Its very important not to restrict the size of the oil lines on a Ricardo transaxle....as they are part of the integrated internal pump system...-10 is the correct size...as I supplied.

 

[Alex]

Its very important not to restrict the size of the oil lines on a Ricardo transaxle....as they are part of the integrated internal pump system...-10 is the correct size...as I supplied.

Some of the guys on the f-gt forum are making home-made oil coolers w/ -6 line to save money lol :worried::worried::worried:

Stupid question but I measured the oil recirculation hose (the 6'' loopey braided hose on the Ricardo) and it is -8. The fitting the 90* bypass hose adapters screws onto is M16x1.5 to -8an .... if -8 were a restriction wouldn't the oem bypass hose then cause the transaxles to fail? I'm also thinking though that if you use -10 hose, when you get to this fitting you have to neck down to -8 at the transaxle, unless you replace the fitting in the Ricardo with a M16x1.5 to -10an .... but from my readings on the f-gt forum it seems it uses some special sealing washer (not o-ring) and I'd imagine it's $$$$$$$$$ to get that sealing washer from Ford. (I just hate having to route -10 hose, it's so unflexible, lol, but at the same time I don't want it to go b00000m)

 

[Fran Hall RCR]

Alex,

-6 will certainly restrict the flow...and not be a goood thing...I was told by a Ford engineer involved in the transaxles development not to restrict the flow...you may be safe with -8...I have the same parts on my car as supplied to you with no problems....

The black braided hose is much more flexible than the SS but its also more expensive and has a shorter lifecycle...

 

[Alex]

By black braided hose do you mean Aeroquip Startlite hose? I'd always thought (perhaps wrongly) that the service life was similar to the stainless braided? This will require reserach to update my knowledge.

I have no doubt -10 would work well - I was just curious since the OEM fittings are all -8 in it........you know me, 5hrs to study, 2hrs to question, before i spend 5 seconds to turn 2 bolts =)

 

[Fran Hall RCR]

Earl's Performance Products UK - Ultraflex Lightweight Smooth Bore Teflon Kevlar Braided Hose

 

[Doc Kaler]

That's what I am using...good lightweight durable stuff. I am using AN -8 for the transaxle oil cooler and a Setrab cooler.