wanting to know has this been done / what would this cost? if there was an obvious thread for this that i've missed, i'll delete this thread.

 

Mazda NA added one to my 04 AT back in 06 when I was having major stalling issues. They were trying to bring the core temp down a little. It made no difference in the end as they replaced the motor. They paid for it. So I dont know how much it would cost. But I do not believe it would be overly expensive as it should be just a bolt on type of thing.

 

yeah there is many AT rx8 member have done that, and they are really helpful. its just that it really expensive to buy a new one. a used one is a better option. But i am planning to buy a new one.

 

Contact MDW1000 he installed a 2nd oil cooler and he will tell you all about it.

 

I bought mine used from a parts car. Mazmart will sell you a kit for about 700 bucks. Not sure how much the install will run you - a local (mac11) graciously installed mine.

I have an oil temp gauge, and the only time I really need an oil cooler is at the track. Around town the oil temps never got high enough to worry about. On the track they would get into the 240s before the install, around 210 after. I expect those will drop a bit more the next time out at the track, as I will have the BHR radiator installed.

 

Hey Mark, It sounds like your bypass plug was actually working.

Rotary Resrurection did a Rx7 2nd gen oil cooler install DIY. Sould be in the DIY section. not the prettiest install by really effective for getting the temps down.

 

i bought my mazmart second oil cooler second-hand but still brand new and un-used for $250. i don't think you'll get that lucky though.

 

Not sure what you mean by that - please excuse my ignorance

Is there a plug that bypasses the oil coolers under certain conditions? If so, what sensor does it use, because there is no oil temp sensor on the rx-8. At least not that I could find reference to in the manual, and the mazda techs can't pull it with their scan tool. Seems really stupid considering how important oil temps are to a rotary, but I guess they figured most people wouldn't be tracking theirs.

 

Forgot to say that when I got mine, I got both oil coolers and all the lines for 100 bucks. But again, that was off a totaled parts car, so there is always the risk of their being some damage. I bought mine from a reputable person and it works fine (knock on wood

 

nvrfalter,

Do you track your car, or do you plan to go FI? If so, I'd say this is definitley worth it.

If you do normal street driving in jersey, I doubt that you really need it. If you lived in the desert I'd say do it, but I think the climate in jersey is roughly the same as here (chicago).

I didn't see any alarming oil temps on the streets. In fact, in the winter with two coolers, it is hard to get them above 140 unless you are sitting in trraffic a lot. If anything, in the winter I worry that I have too much oil cooling now. But I know mac11 actually put in something to block off his oil coolers when it got really cold, so you could always do that.

That said, it won't hurt you to add the extra cooling capacity.

But if you haven't tracked the car yet, I'd say definitely give it a try. Do your first couple of times with an organization with good instructors, like NASA. I also liked TrackDaze. Once you try it, you will most likely be hooked!

Is yours a 4-port or a 6-port?

 

There is (I'm led to believe) a wax thermostat type plug that bypasses the rotor cooler jets, to warm the rotor quicker.

I'm also told that each cooler has a bypass built in to allow circulation without overcooling......

S

 

first of all, thanks for all your great input in this thread.

i have a 2004 4 port AT and for this very reason i have NOT tracked the car. i do have an interest in tracking it tho, and this is one of the issues i see even in daily driving. it seemed normal to me because i drive the car like i stole it most of the time, but even on idle my car seems to run hotter than other 8's. sometime soon i'll be getting gauges including one to monitor this, but i wanted to see what the cost/hassle of installing the second cooler was.

 

I'd say get your second oil cooler and the BHR radiator and then give track days a try! The Mazmart water pump and a cooling fan mod (either a reflash or used Mazsport one) are also good ideas.

I'm planning on switching to Royal Purple oil as well. I read about it on Racing Beat's website. They've found that it runs cooler than dino oil. The only problems they've encountered with running synthetic is switching a high mileage rotary from dino to synthetic. I'm only at 26K miles, so I think I'm ok.

Just so you know, Paul at Mazmart also recommends premix, especially for automatics, since we spend more of our time at lower rpms.

 

i have a full oil cooler setup for sale if anyone is interested. i was gonna save it for the track car, but that car sold this weekend so if anyone is looking to do this i got what you need.

I dont know any local people around with AT except for rotary resurrection and like noted above hes been succesful in it.

 

We do?

 

and he supplies all the parts to do the job.

beers

 

yeap, here in Greece with the twin oil coolers, we have a bypass valve for early morning start up... ;-)

why does Paul from Mazmart recommend premix if low rpm are used ?? wouldn't premix be necessary for turbo applications ... instead of N/A ?

 

here is what the opil cooler bypasss plug looks like. This one has a 6.5mm spacer to keep it in the full open state. The thermal wax will only open it 1.8mm. Full open if the wax is still good would be 6.7 or 6.8 mm open.



Here are the innards.

 

i have a quick question, do rx8 stock oil pan have a oil drain for turbo application, if not we have to drill it right? i know the greddy oil pan have additional oil drain.
I am thinking whether i have to buy greddy oil pan before installing turbo or after

 

The OMP injects less oil at lower rpms. If you drive in automatic mode, you will be at low rpms most of the time, hence less oil to lube the apex seals, etc, etc.

 

Dear BHR and Mazda Maniac, I want ask have you guys ever planning to make oil cooler that is better than stock, HKS and RE make them but that are really expensive and they are not as good as it describe.
And I don't want to pray someone crash their car so I can buy their used oil cooler. I also don't really want to pay 650 for the stock oil cooler. anyway just wondering.

 

See G3tR3DDY2GR3DDY's post earlier in this thread. He has a used setup you can buy from him.

 

not any more it's on its way to my door... with that said, I need some directions someone hook a brotha up...

 

well i dont have any money righ tnow, jsut bought the turbo kit, but i am just asking for the future.