Gomez

Standby.....update in 5.

Gomez

The latest....... See, I'm wearing sunnies.

Gomez

You'll have to bring your second oil cooler with you, though!!

olddragger

iTrader: (3)

Currently, the Ga boys line of thought is-
1- possible 3nd cooler(fellow NASA member JAy Gold--berg--I think has installed a 3nd cooler but has to remove it in the cooler part of the year.
2- upgrading the existing coolers and adding thermostats/secondary fans for hot days and city driving. (this may not be do able--cost vs benefit)
3- upgrading MOP like Racing Beat is doing. (currently using premix for any high speed/high rpm driving(track) until we can get this done)
4- I have opened up the space behind the oil coolers a little--sort of like a front brake/oil cooler duct . May help/may not--but looks cool and makes people start a conversation.
We do not want to take up anymore frontal area if it can be helped.(3nd cooler)
Side note/interest is that when the a/c is used the temps go up remarkably as all are aware. So front air space is at a premium.
Keep this going
rotor on
olddragger

rotarenvy

sounds like I jumped to conclusions and more testing is necessary.

if there were other factors like bugs to blame for the overheating and the overheating caused the car not to rev beyond the VDI rpm then there is the power loss.

if he was holding the car at a constant 7k rpm when it overheated I may be able to shed some light on it.

I held my car at 6-7k (I think it was 3rd up hill) for about 2km in 30deg+ temps and my oil and water temps sky rocketed! oil peaked around 124deg and water was 115deg both were climbing faster than I have ever experienced. I just though it was the extremely hot weather the car couldn't cope with. for reference on the track the car never reached 115deg (@25deg) taken to the full 9k. this leads me to think it has something to do with high engine loads.

zoom44

eeewww.. 124 and climbing is not good did you change the oil or get an oil analysis?

rotarenvy

no since it was a one off. the car dosn't get driven that much and the oil is changed every 3 months or so.

Hymee

iTrader: (1)

Just to re-iterate, Wildcard didn't have a bug problem AFAIK. It was NTRotorHead who mentioned it here.

Cheers,
Hymee.

Wildcard

Wow, I'm gone a few days and things just got crazy around here!

First, the 215km/h runs were done with about 10km/h of headwind. The 230km/h+ runs were done with about the same wind strength but with both head and tail winds (in both directions). These runs were also about a week later too. Temps for both were 33-35 deg C. The weather is the same here everyday for months on end.

As for the rest, I don't know how this thread became about overheating? There were no overheating issues during any of the high speed runs we are talking about. All I was observing and reporting was that top speed was significantly lower with the intake on than without, albeit with a stock airbox mated to it.

When I did have overheating problems, it was caused by a combination of sitting on 5000rpm continuously with an OAT of >40 deg C. (No locusts). I'm sure I would have overheated in this situation with or without the RB intake on. Would it have still happened with 2 oil coolers? Who knows....

Since this occasion however, I have not overheated, including during all the high speed runs that we are talking about. I also did a drive recently to Darwin where I sat on 180km/h for 90 minutes straight. OAT was 35 deg C and the car did not have any overheating issues at all. I did go through a **** load of gas though.

I also remember that a while back Mazda broke a 24 hour time/distance world record by driving two stock RX-8's continuously for 24 hours and covering over 5000km. They must have been at WOT the whole time and I bet they didn't overheat. Sustaining high rpms continuously when the outside air is 105 deg F plus is a big ask in anyones book if you ask me.

Hymee

iTrader: (1)

^^^^^^^^^^^^^^^ LOL!!!

zoom44

its all Hymee's fault ^^^ can't tell a story apparently maybe he's been at the distillery again that RP talks about
glad that's straightened out

Hymee

iTrader: (1)

I didn't think the messenger got it all that wrong! I always intended the thread to be about top speed, rather than raving on and on about overheating. Was just trying to mention all the bits of info. I'll respectfully withdraw the part that says "The overheating problem was gone." as it obviously didn't really exist at the time of the back-2-back tests

Yep - he had overheating problems alright, but OK, it was only when the ambient temps were > 40 deg C. More info on overheating here, with pictures: https://www.rx8club.com/showthread.p...76#post1265576

OK. So the back to back tests with the ram intake on / off were done in less than 40 deg temps, and no overheating issues occurred in either combination.

So where does this leave us in regard to the top speed issue, and the effect of the removal of the VFAD?

Also, Wildcard, you had your K&N panel filter in at all times, yeah?

Cheers,
Hymee.

PS - Did I get it right now?

jowettw

HOLY. CRAP...

i wish i lived in Australia - could do without the higher temps though.

Hymee

iTrader: (1)

But if you lived in the part where you can do those speeds, then you have to drive for 1.5 hrs straight at those speeds to get to anything

zoom44

i still think you're in your cups

jowettw

i guess it's a trade-off. but it's still gotta be nice to drive at those speeds legally!!! (or not)

Wildcard

The K&N panel filter was in the whole time.

Glad it has only taken seven pages for us to get our story straight!

Hymee

iTrader: (1)

Wildcard -> <- Hymee

I didn't think I did too bad

Cheers,
Hymee.

takahashi

Life is full of ****!

I just caught up with this thread. What are you EXACTLY agruing again?

Wildard simply report a fact and seems all just circumspect the whole thing. It is like the British tabloid.

Some one like rotaryenvy will have a better position to say about overheating. He is watching the water temp and oil temp all the time (with his defi meter ).

People here are guessing their water temp and oil temp and never one says about their experience in real life... am I missing the data hidden somewhere???

rotarenvy

I don't think anyone knows what's being debated by now
there is so much misinformation in the thread everyone is confused.

I'd sum up the thread as; rb duct caused (at this point in the debate) a lower top speed and hence produced less power than the std intake at high speed.

takahashi

This is a mere observation, and scientific proof is needed for the lower top speed. (edit: and that is what exactly Hymee is reporting)

Hence, people has been arguing the variables - in the last 90 replies or so.

Hymee

iTrader: (1)

Now I am confused...

Is it a (almost) scientific test if you can make 215 km/h with combo "A" and 240 km/h with combo "B"??

Or is that just a observation??

I thought the arguments had passed.

Cheers,
Hymee.

timbo

Isn't the issue whether there's much to be gained through induction tuning, and the recorded observations posted here that, using different intake paramenters, stock or close to stock seems to work best.

A number of queries have been posted against these observations but none have included alternative data.

takahashi

In real scientific term it is just an observation.

You need to prove it and reprove it in various conditions before publishing it as a "fact" or a proven entity beyond doubt. And you should have methodology, result analysis and discussion written up before publishing. It is more like publishing a drug effectiveness or a side effect with ONE case report.

E.g. You will not be willing to accept a slim pill if it only proven that it works for Mrs MacDonald, right?

Hence they are called speculations...

Wildcard

My god, is this an internet forum, not a scientific journal. We are merely sharing an observation. In future I'll keep my observations to myself.

And actually, I WAS monitoring the temps precisely - with my sCANalyser.