skeeler

Is this still on the to-do list? Any ETA?

shuiend

iTrader: (24)

I would guess based on everything else on TSE's to do list that do not expect one till at least towards the end of this year.

Seefo

iTrader: (5)

all CPU heatsinks are attached with a synthetic silver grease stuff. perhaps something like that, but with more adhesive power (or make some attachment points for the heatsink).

Although I agree that you will have better results with a pump/cooler setup.

skeeler

Yeah, they do seem to stay busy.

End of this year is fine for me. I'm not planning the major power mods until then anyway.

skeeler

Is this still in development, or has the turbo kit absorbed all of TSE's R&D time?

Savington

iTrader: (31)

Still on my todo list, but not near the top. I'll get something put together this fall after NASA Nationals are over.

chpmnsws6

iTrader: (12)

New Electric Oil Pump for Diff Cooler or Turbo Scavenge Conversion Unlike VDO | eBay

Some line, fittings, a cooler, relay, wiring, and a switch.... Or get fancy and run a coolant temp switch like the OEM miata fan switch.

1993ka24det

I got to get to work on mine since the flat underbody is going to trap heat even if I litter the bottom with Naca ducts.

I coping the Porsche RSR race car with 2 side ducts for Trani and Oil cooler on each side of the radiator duct.

1993ka24det

What about making ducts for each Oil/Trani cooler then run piping from those to the Trackspeed Engineering Brake Ducts?

patsmx5

iTrader: (16)

Bump!

Anybody install a trans or diff cooler on their miata? It seems reasonable that cooling the transmission would improve reliability, this at least seems accepted as true in other applications (trucks towing, automatic transmissions).

I found this Boat Marine 12V Engine Oil Change Gear Pump 3 2 GPM Transfer Water Electric DC | eBay on ebay, it's rated at 3.2 GPM, and it's a gear driven oil pump. I've searched a lot, and it seems to be the biggest oil pump that's gear driven and electric and not 1000 dollars and weighs 40 lbs.

Doesn't seem like much flowrate to me? Even if you had a 100% effective oil cooler, you'd only be pumping about 3 gallons/minute of cool oil into a box that's having to handle a lot of power on a track. I would think you would want more flowrate, but maybe 3 is enough if your cooler is awesome?

glade

iTrader: (2)

At 3 gallons per minute, that's 12x the capacity of the trans, per minute. I'd almost be concerned with not getting to proper operating temps

patsmx5

iTrader: (16)

That would be a great problem to have! I will have a temp sensor for the transmission fluid so I could easily control the pump based on temp, run it only when needed. I guess in theory it will for sure help cool the trans, and the question is "how much"?

sixshooter

iTrader: (12)

Is it rated for 300*F?

patsmx5

iTrader: (16)

It says it has bronze gears and a brass housing. From what I've read about other pumps rated at less flowrate, plastic = sucks, metal = high temps ok. Also if it comes on at say 220*F and keeps the oil below 230*F, then it won't "see" 300*F oil in theory.

ThePass

iTrader: (3)

Keeping the trans temp below 230 may be a tall order, it runs a lot hotter than most realize. All the more reason for some experimentation in this area though. Personally would prefer an electric pump rather than gear driven I think..

-Ryan

sixshooter

iTrader: (12)

I'd be worried about parts like seals, which are often constructed of plastic.

patsmx5

iTrader: (16)

Well so far it's the best pump I've found under 500 bucks, so I'll probably just buy it, hook it up, and report back whether it works or not and if it leaks or not. Unless someone finds a better one!

Ryan- I agree, I don't think pumping 3 GPM of cool oil into a box that's handing 300+ hp is going to be enough to keep it cool, but I'd love to be wrong. I guess either way I'll find out.

So lets talk about heat exchangers for this. Where would you put it? How big? Fan or no fan? What size lines? I mean we're going to be pumping gear oil, so I'm thinking minimum 1/2" hoses.

Probably have the pump close to the transmission, so you don't have a lot of restriction on the inlet side, then let the pump push the fluid around to a heat exchanger and back.

Leafy

iTrader: (1)

That pump looks fine, ryan its an gear-rotor electric pump like the same type of pump as the oil pump but driven with an electric motor. Probably only has one seal from looking at it and its probably an oring so it should be fine.

Pat, pretty spot on on pump placement. For tranny connection, were you planning on drilling and tapping or using drain and fill holes already there? A banjo fitting would probably fit on the drain hole pretty easy and have a low profile.

Heat exchange wise. Does anyone have any temperature data at all? Just knowing the mass of fluid, the mass of aluminum and the mass of steel in the tranny, and the time it took to raise the tranny and fluid to x temperature you could figure out how much heat rejection capacity you need with the heat exchanger. Or you could just guess randomly and measure temps and compensate from there.

patsmx5

iTrader: (16)

From my couple hours of google searching, my best guess is the people that have this data, and know what works/what doesn't are either not telling or simply not on the internet posting about it. I found almost nothing.

I'm figuring that too much cooling is never bad, so build it big and see what it does. If it's too big the pump won't run all the time, so no harm their.

I will do a little calculations at some point, just haven't yet. Working on wiring design for my car right now. But the CP of oil looks like it was ~1.7 kJ/kg*K, so much less than water.

Leafy

iTrader: (1)

Too big just ends up being more weight and more blockage of the already precious airflow through the mouth of the car.