Antoine
Administrator
geez man i wish i had this kind of help near my car it'd at least be driveable at this point.... can't wait to see more pics of yours
Sweeeeet!
very sweet
Good to hear that the Cosmo is going strong
Mine was off the road for a couple of days. I thought a fuse had gone, but it turns out the head light bulb holders had melted. Easily replaced and fixed by my mechanic. Might be worth checking out on yours.
No idea yet why it was like that. Seemed to happen over a long period of time.
Last weekend I also went to a Rotary dyno day (hosted by the local Rotary guys). The Cosmo pulled 190kw and was 3rd least powefull on the day with an RX2 13Bt pulling 395kw being 1st.
Have you taken it on any long cruises yet?
Anyway keep up the good work![]()
Haha...It didn't take you long to notice I updated ye 'ol thread...Actually, I was originally thinking about running an EBC...but I've come across some hardcore rotary guys who favor the simplicity and straight-forward nature of the MBC.
I stated I was considering an MBC...not decided yet...but you do make some solid points about the range of options that an EBC offers...It wouldn't hurt to be able to adjust for economy or "BAT OUT OF HELL" mode at the touch of a button...Hmmm
Price is not the main factor...Performance, quality and the right match are the factors that will decide my purchase.
I'll have a look-see at this Turbosmart e-boost unit...How does it compare to the crazy setups from Blitz, Greddy and HKS?
pics of defi setup?![]()
Turbosmart products are favoured by all the hardcore guys down here..doesn't hurt that they are local products for us, made to exceptionally high quality. I've ONLY ever heard good things about the eboost2 unit. My only gripe is that it seems a bit "involved" to set up (lots of settings...pertaining to things such as sensitivity, or how quickly it alters the solenoid position - which directly relates to the smoothness of the boost curve, gate settings which control how rapidly the boost controller allows the waste gate to open and so forth). But yeah...top piece of kit - and its a digitial boost gauge to boot.
I guess most of the "hardcore" rotary and turbo guys I know are into drag racing - simplicity doesn't even enter into the equation when you are vying for that last one hundredth of a second - but i'm just wary that your car is already a gas guzzler - feeding it more boost with no easy/quick way to moderate the boost when you don't need it is just going to add additional pain to the hip pocket.
High end electronic controllers also give you the ability to control HOW the boost comes on, whereas MBC's will just bleed a constant amount of pressure off, essentially meaning the turbo will spool as fast as it can build boost. Whilst this all might sound great on paper, in practice a more moderated approach to how the turbo comes on may be easier to live with on a day to day basis.
You may also consider sometime in the future whether the stock cosmo EMS can keep up with your high performance demands. I imagine the computer is fairly limited with regards to how far it will let you push the power and boost up.
Antoine asked how much boost I am running. Stock pressure, peak is 9psi I think, but it is normally around 8.
LordWorm said the Cosmo is a gas guzzler! Fair call I guess. Although the latest official figures from ford for their new Falcons is worse. I get 12ish litres per 100km on the highway with aircon running. Now that it is winter I will have to see what it does with aircon off.
The stock EMS is of course limited as you would expect, but from talking to a few mechanics and other rotary guys it would not be too hard to fit a piggy back system. That is something I am looking into as it is running a bit rich. A piggy back system will give me the ability to lean out the ratio to remove the flat spots in power. Running on the Dyno was useful, the 20B is healthy but the EMS is running it a little rich. Resulting in a not perfect power curve.
The stock turbos are also only good for a bit more than stock pressure. If I recall correctly they are good for 1BAR and then they start to break, that gives us a little room to play with but not heaps. Although one of the guys in Australia got his stock turbos replaced with new ones from Mazda, so they can't be that hard to find.
Does anyone know if they are the same as the RX7 twin turbos?
More photos of the Cosmo please![]()
Proven time & again, the MBC allows boost spikes that will kill the turbo's. Just troll the FD RX-7 forums to read all about it.
The trusted weapon of choice is the Blitz SBC or similar. However, the recent HKS EBC is proving better again.
Note the boost levels dropping on my 20B as the revs rise. The dropping boost is not due to the EBC but despite the EBC's best efforts, the turbo's are simply running out of flow & pressure levels suffer as a result. 227KW @ rear wheels means the standard turbos are struggling to flow more than 300KW through them & if you have ever seen just how small the rear turbo actually is, you will scratch your head wondering how they flow even that much.
My recommendations........ Go with the HKS EBC
Note: the lower KW dyno run (upper pic) was when I had "boost issues". The high KW run (lower pic) was after the Blitz EBC was installed & boost was restored.
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REgards