http://www.ladylivewire.com/enuttage/Dyno.jpg

14lbs, 850cc injectors.

Torque was a little under what I was anticipating. HP numbers were great in my mind.

-E

 

Don't take this the wrong way because everyone is different and opt for turbo's for thier situations. I just, for the life of me, can't figure out why anyone would want the RX6 turbo.....It doesn't make anymore power than the stock twins. And if your going to all the expense of getting a single turbo, wouldn't one want an improvement over stock? Just my .02...

 

Stock block, stock injectors, stock ignition, stock fuel pressure and pump?

Nice!

I would guess you might have another easy 2-5% hiding in the tuning. You looked a little lean on the high end. Did you get a look at your injector duty cycles?

Regards

Tony K.

 

Ernie is a troll, Ernie is a troll, Ernie is a troll! Nah, just kidding.

To each his own. The turbo spools silly fast and barely works hard (throws high heat) unlike the stockers at that same level of HP.

Regards,

Tony

 

That is one of the nicest torque cures I have ever seen on a rotary ... be real nice if it went to 8 or 9 rpm like that!

3200 rpm to 7000 with a flat but ever increasing torque curve, nice! Getting a bit lean on the top if you beleive the dyno.

 

Not taken wrong at all Ernie. I'd turn around and ask you the same thing. Why in the world would you want a big turbo with lag, lag, lag? But...I see your usual application is the strip (assumed by your sig).

Mine isn't. It's the autox. I wanted something more reliable than the twins (and newer), with similar spool up and more power. I got more safe power from my tuner. It's rare you see stock twins going over 360rwhp, from what I've seen anyway. I'm sitting at ~380 with ceiling room at 14psi and only 850cc secondaries. New injectors and another 3psi and I'm cracking 400rwhp. But it's not worth it for me. I have more than enough power now to be competitive with anything in my autoX class, as long as I can drive the power properly.

twokrx7, yeah, I think he pushed it a little on the second pull, but he also retarded the timing. I'm trusting my tuner on that one.

Badog, not stock anything at this point...hardly. New fuel pump, Greddy SMIC...I think that's all the major news there.

-E

 

Nice, I suppose a quick spooling turbo would be nice for the auto x or road racing. I wouldn't know! I also didn't know that was with stock fuel. Kick up the fuel pressure and some bigger inj, and fuel pump and your good to go.

 

enuttage, do you have a stock motor or is yours ported? What else are you running with the turbos (IC, exhaust, ignition, etc...)

 

Good job - Similar results - My boost fluctuated between 13 -15 LBS. leveling off at 14 LBS @ around 6500 RPM. (The way I set up my wastegate.) I am fixing the problem by running a lighter spring with mechanical boost control. My ignition also started to cut out at 6700 RPM. Modification list and pic of dyno chart below.

I am trying for 415 to 425 RWHP @ 17 LBS of boost 91 octane gas. Don't think it will happen but that is the goal. The RX6 spools as soon as you hit the gas any RPM. I think it is a good street / weekend track turbo for a 2800 LBS car W/ driver. Very easy to drive and predictable power curve. No surprises.



https://www.rx7club.com/forum/attach...postid=1245690

 

Couldn't get the link to go through so I copied and pasted -

Horsepower - 379 @ 7000RPM
Torque - 309 @ 5700RPM

13B - Large street port / Rotary Power / 3mm seal
Intake manifold - pinned, ported, polished and Extrude honed
Apex'i RX6 turbo - Exhaust turbine housing ported / extrude honed
Computer - PFC / Commander
TiAl 46 mm Wastegate - Green spring suppose to be 11psig but was between 13 - 15psig
TiAl BOV
No boost control because of wastegate spring pressure
Fuel pump - Large Denso - Don't know GPH with my fuel tube size.
Stock fuel pressure regulator
Injectors - 550cc primary - 1300cc secondary
Stock ignition
Exhaust - 3" W/ 2 mufflers ( SR Motor sports )
Apex'i GTR Intercooler - W/ 2 ½" tubing
Oil metering pump ( REMOVED )
Secondary throttle plates removed
Oil - Royal Purple 5 - 30WT
Gas 91 octane With Two stroke oil additive
Spark plugs - HKS Iridium Racing R525RE

 

So what is it that's giving you 25 lb/ft more of torque? Mine seemed a bit low to me based on graphs I've seen previously. This would begin to confirm that.

FooknTite, I'm running a Pineapple Racing street port with Greddy SMIC, DP, MP, exhaust, CWR oil coolers, fluidyne rad and upgraded fuel pump. I think that's about the extent of the power making/cooling mods.

Thanks for the comments fellas.

-E

 

I'm gona chime in here......I made 365rwhp and 352rwtq @16psi when I had the apexi turbo setup. There are a lot of variables that effect dyno readings, porting, exhaust, temperatures, and the dyno itself.

 

enuttage -

The higher torque reading could have been when my turbo was spiking at 15LBS of boost.

I am also running a very large FMIC. Intake temps were low. I don't know how low. I was spiking between 13 - 15 LBS of boost. The boost didn't stabilize until around 6500 RPM. I spent a lot of time on my intake manifold, Intercooler & pipes, exhaust system and exhaust turbine housing. I tried to maximize the plumbing to the turbo specs. I also talked with some very knowledgeable people about the size tubing size ( Intercooler / exhaust ) before I made it. I even polished all the interior pipes that I could reach. All this work wasn't to increase HP but to decrease turbo lag and promote flow for the RX6 turbo. I wish I had gone bigger but I didn't want to have to fabricate everything. At the time I purchased this kit, there wasn't much of a selection and I didn't want to R&D my own setup. I didn't have the knowledge then. I stile don't know DCK about turbos and I have done a hell of a lot of reading. All my work and I stile don't think that I will be reaching my final goal of 415 to 425 RWHP on 91 octane gas. Other people are doing this and much more with different turbo kits. I have no idea what kind of lag they have.

The key is to get your power to the ground smoothly ASAP. Basically it is a drag race to the next corner. If you set yourself up and can get the power down first even a lower HP car will out-perform a higher HP car.

Rice Raceings First Gen. weighs around 2200 - 2300LBS and he is putting down around 470 RWHP

Say 2400 LBS with driver divided by 470RWHP = 5.1 LBS per HP. Very very fast for a street car. A first Gen is also a very easy car to drive. Long wheel base and decent weight distribution. Very few cars would even be able to keep up with him. I have no idea how much lag he has. Might be " SCARY " coming out of a high speed corner. He probably can't even to use all that power in all but the longer straightaways. BUT WHAT FUN TRYING TO.

So I think your #s are in the ball park. You have a very reliable setup that should give you a lot of fun / trouble free service for many miles. " Enjoy "

ALSO IF ANYBODY HAS ANY DYNO SHEETS W/ RX6, POST THEM WITH YOUR SETUP. LETS DO A COMPARISON. THIS WOULD BE A VERY GOOD LEARNING CURVE.

 

Here's mine. RX6 / street port / SMIC / 550/1300 / PowerFC / etc. My boost control setup was wacky when I had the car dynoed. 15 psi at 5500 or so, drop to 11-12 by redline, probably in the 12.5-13 psi range at power peak (7000 RPM):





I have my boost more under control now, so I need to do some tuning at the new levels and get back to the dyno. I am hoping for 400 RWHP at 15 psi.

-Max

 

Very cool Max - It is interesting to see peak torque happening within 500 RPM on the 3 Dyno sheets.

 

It's been done by few guys like Jason from AEM for example. He made 430 rwhp with STOCK injectors, boost-a-pump, pump gas, programmable ecu (AEM), full exhaust, LARGE intercooler and a single turbo. There is plenty enough fuel there even when the injectors are running on full duty cycle. This is a fact and it's been done before.

 

My graph is awefully squiggly, too, which makes me think it would be a good idea to try some different plugs like the B10EGV that can be gapped.

I think enuttage has 4x850 rather than the stock 550/850 injector setup. For good tuning control (weird stuff is rumored to happen at really high duty cycles), it seems like 4x850 or 550/1300, 850/1300, 550/1600, etc. is a useful change. Yes, it seems that you can make power with smaller injectors, but it also seems like you give up some opportunity for fine adjutstments at the limit. I don't know how true it is, but people say that injectors go full open at 85%-95%, which means you can tune up to that duty cycle and then they just go full open. If that is true, you can't effectively choose a duty cycle between the full open percent and 100%, meaning you give up some tuning control. It probably changes with RPM and other factors, but it is something to consider. People also say that the injectors can burn out and fail at high duty cycles, but that doesn't seem to hold true for FD injectors at least, based on the lack of reports to that effect. Maybe the "full open" rumors are also false, but maybe they are true, I don't know for sure. It would be interesting to do some flow tests at various high duty cycles and high pulse frequencies to see when/if they really go "full open".

-Max

 

Max,

I am at 4x850cc on the injectors.

Also, FWIW, my tuner mentioned the exact same thing you did about injector duty and being "full open".

I'm a little behind the curve on the know how on a lot of this stuff, but you seem to be echoing what he told me regarding my injectors.

-E

 

Those are great numbers. Perfect for an Auto-X/street car.
Did you get the kit that lets you keep the airpump???

 

Nah. It's the old version. I actually just removed the pump and installed a pulley kit (necessarily).

-E

 

enuttage,
what did your ignition maps look like in order to pull this kind of hp on pump gas? what kind of advance and split did you have at 0psi, 5psi, 10psi and 15psi?
thanks
justin

 

Ah, a question for my tuner.

Wish I could help you out on this one Justin, but I'm pretty clueless. However, I do have some more data that I can share from the session...if I can ever find a scanner to use.

I'll try and figure something out on that here tonight or tomorrow.

-E