rotorocks

Tell me about it.

Oh, I tried to change the VDIE (aux ports) setting to 6200 rpm (the standard setting is 9500 in Int-X), but i did not notice any improvements in the performance, though. In fact it felt even slower.

Anyone knows what this number controls? Could it be the closing point?
if so then what function controls the point at which the ports open?

The manual says:
"This controls at what RPM the VDIE opens and closes..." this is kinda confusing, as there is only one setting, there is no option to set a certain RPM range, like say 6200 - 9500.

Any thoughts?

rotarygod

It opens at that point going up in the rpm range and closes again going down through it.

MazsportScott

Anytime the engine is operating above the user defined RPM, the VDIE changes position and when it drops below that RPM it changes to the other position.

dastallion951

hey roto congrats on the sts like turbo kit..........n honestly zipties n ducttape aside, the fact u said earlier in ur posts that ur no mechanic and fabricator yet not only did u try somethin thats been done on other makes n models.........yet had the ***** to actually custom make it, quite impressive to say the least......my question is without havin to go back to way in the beginning what sized turbo r u running???? i got my greddy kit comin in the very near future n might not be satisifed with it.......so could u pm me with the specs this custom turbo kit u made......n on another note.......with running as much boost as u are......have u ran into any fuel problems.......or ignition problems for that matter, i remember readin in other threads of turbo'd 8s when they were around 300-350 that the stock ignition system as well as the injector duty cycle bein past 85 and fuel pump just about bein maxed out......couldnt handle it????? have u found this to be true in ur turbo kit???

rotorocks

THAT IS NO DUCT TAPE!!! It is heat insulation...
You know the kind that has this yellow fiber inside and foil on the outside... I run out of the wrap I used on the other parts, so I temporarily affixed that piece to cover the hose, where it is near the exhaust.

Turbo – T3/T4 (T04E) with regular friction bearings. It is a cheappo turbo that can be picked up on the ebay for $160 -180 bucks.
Wastegate - t3-t4 compatible Turbonetics Dual Port Internal waistgate flange and actuator that I also got off ebay for like $130 or so I forget now.
BOV - Greddy type RS
Boost controller - is the regular variable boost controller.

I doubt you'll be able to fit it where Greddy turbo sits, as it is 2 "sizes" bigger. I really don't have any other specs, I just fit measured and cut stuff as I saw convenient, right on the assembly. It would be kind of difficult for me to get the exact specks of all the tubes and pieces without taking it off the car. But you can get a good idea from the numerous picture I posted throughout the tread.

As for the boost, I run 10 psi at the highest now (don't think I need that much 7-8 would be plenty with a good tune, but it just won't go any lower) I have to regulate it myself through the use of the throttle. The 14 # runs I did earlier, were not the pressure I run normally. It was just something I did while doing some experimenting and just for a couple of seconds. And no, I have not experienced any problems other than the fact tha Int-X cuts off the fuel completely at 14 PSI.

I haven't had a chance to do any modifications to the fuel maps, so at the present time, the car runs on the Mazsport base map, which is configured to be quite rich on fuel for safety, plus the length of the tubing, and the size of my intercooler, make sure that the charge is quite cool by the time it gets to the engine, which is also helpful. 300 - 350 hp? I doubt I am pushing that much on 10# at the time, because again it is not tuned yet, but then who knows? I did smoke a dude in a Crossfire the other day without any effort at all. That was the only case when someone tried to challenge me. For some reason now that the car is FI, not many have the guts. Sometimes someone pulls up and starts horsing a bit, but as soon I crack that throttle open they abandon their intentions. I guess that exhaust sound is very explanatory. BR-R-R-R-O-O-M-M-M-Ps-s-sh...CHILL, OR YOU WILL BE SMOKED!!!

But back to topic... I tried one day to feel the Intercooler after driving home from work. the turbo side of it was warm to a touch, the middle of the cooler was barely above the ambient temp and the Intake side was completely cool. I mean not even a slightest increase of temperature.

If you need any other help, PM and I'll try to help in any way I can, remember I am too a newb to all this

OK, Scott, RG thanks guys. I will test it some more.
Scott, what do you recommend, should I have it set to 6200 RPM or leave it as is and control that power loss by adjusting the fuel?

MazsportScott

I would set it back to 9500rpm and work on the tune.

Razz1

Wow you solved the A/C problem. No more cabin heat!

You'd be surpised what you can hit in the road with that pipe.

rotorocks

Not sure what you mean by that...


Sure, if start doing rally... As long as I am driving on the hways and stick to good roads i think I'll be ok. There is like 3" there. that plus driving the car for almost 1000 miles now tells me that I am fine there.
It is the photo, it makes it look huge. I reality, this is a piece of pipe that is barely 2 feet long going from the center to the passenger side at about 45 degrees angle with a decent clearance.

Some people lower the cars an inch or more...

rotarygod

I do have to point out that there are people that successfully drive around with cars lowered so far that they can physically scrape off street reflectors. This still appears to have some clearance. Pictures can be deceiving. I've seen many people claim that a rear mounted turbo placed where the muffler is hangs too low and will hit debris. What kind of debris are these people running over? I guess if you run straight over a dog, a ladder, a retread tire, or maybe a random midget you can get some damage. Of course you'll get damaged from hitting these things anyways. Some of you guys act like he's going to go out for a drive down the street and a piece of concrete is going to jump up and immediately rip off his piping. By sheer virtue of it hanging down lower, yes it has more vulnerability to damage from road debris. It doesn't mean he'll just high center it on the first speed bump he comes to.

rotorocks

^ Thanks RG.

I have done a little bit of tuning today.
Advanced the ignition a bit on the when driving in the negative pressure, as well as took off a little bit of fuel overall and a bit more in higher rpm range. (Don't ask how it's done, though, as I am not that intuitive with the Int-X software yet to remember)

The car drives noticeably smoother. Even the transition from Vac to Boost became not so apparent. The slight backfiring when in decel that I had is almost gone. Still I can hear very light popping, but it is much less frequent and barely noticeable. Unfortunately the power still dives as it hits 7K RPM in 3rd gear and in 4rth even earlier.
The good news is that it seems to pick up again at around to 8K mark (3rd gear) and on, so I guess some more tinkering will help eliminate it.

alnielsen

iTrader: (4)

I just read the complete thread. Congratulations on your project. I was disappointed when STS dropped theirs. I thought this setup had merit.
I know the difference between header wrap and duct tape.

Brettus

iTrader: (2)

probably no worse than many of the body kits people have ........

cavemancan

Damb Rotorocks, you beat me to it! I was thinking of this exact setup too. I was going to build the system with a budy of mine but I told him that it would be a few years before I could start the project and I bet someone will try this on the Rx8. I told him this about 6 months ago and viola...You did it! CONGRATS!!!

Please please please get that fuel system upgrade...I would hate to hear that your engine blows due to lack of fuel. I believe I read in one of the threads that the stock fuel pump has a tendacy to over heat when bosted. It happened to someone when they were casually driving on the highway...They were bairly in boost. I might be getting the story wrong but I am sure I am close. I just dont want you to lose the work of art!

rotorocks

Fuel Upgrade will be the first thing I do. Unfortunately, the tree on my backyard stopped growing money. I guess I am going to have to wait for the $$$ to grow back some

The thing with this setup (I don't know about Greddy or other turbos) is that the boost does not come on just because the engine is running. I need to put some load on it. (the more load, that faster the turbo spools) So when I don't accelerate aggressively there is no boost. Not even when I am at 5K rpm. The boost is directly proportional to the throttle position/engine load.
I already mentioned earlier that I can actually control how much boost I run by giving it more or less throttle. 95% of the time the car drives in vac. On the hway I stay out of boost even when doing 100mph. As long as the throttle is not opening aggressively. But if I open the throttle a bit more... not WOT; just give it a bit more and it will go into boost. Again not instantly. It's not like Boom... Slam.... It is very controllable. Some throttle; we go faster (5psi), a bit more; even faster (7psi), or if I flore it the boost will instantly jump to 10psi and stay there. but I almost never do that.
It really feels like you drive it stock. Except much quicker.

rotorocks

UPDATE:
Figured out how and where to take away the fuel. Holy ****!!! I got the car to make power all the way through in every gear (well, it least so I think) I only tried to go to the red line in 4th. No more boggling at 7K, nor 7500 ...
Keeps on pulling hard all the way from 0 - 9500 RMP Whoohooo!!!

You have got to hear how sick it sounds at 8 or 9K with my setup.
It's unbelievable. You can only compare it to a sound of a jet. It absolutely does not sound like a car engine. Just awesome.

romycha1

That's great... If you were near me I would have to stop by to see it...

Do you think you'd be able to make a video of it?

Brettus

iTrader: (2)

+1

mysql101

That's exactly how it should be, and what makes a turbo so great. You boost only when you want to.

With the greddy, if you floor it from a standstill, you're going to get boost from around 3,000 rpm. How about yours?


My boost controller is setup for 8 psi, but I usually boost to around 5 - 6 psi range when in town. What's fun to do is turn up the boost controller so that any little throttle builds up boost. Then you'll feel like you're driving a much more powerful car all the time.


PS: You better have a video camera and make some clips for us to see!

rotorocks

I need someone next to me who has the *****...
Guys at work, don't have that much mojo. They think that am crazy for doing what I do. My wife though loves me very much, won't let me accelerate to anywhere near the boost when she is in the car. My kids, though they love to go "real fast" are not exactly filmmakers I need ....
I will make videos when I get the chance, but I need an operator with a couple of rotors in place of *********

Yep.
Sounds about right. 3K RPM is when she goes whoah!!!

mysql101

I bought a video camera mount with suction cup from buy.com for about $30. I mount my video camera upside down by it from the moon roof.

Once i'm done recording, I import the video, flip it 180 degrees and horzontally, and it appears upright and looks normal..

Just a thought

rotorocks

Did some more tuning tonight took a bit more fuel off overall, as well as advanced the ignition just a bit on the lower RPM 2-4K range 9to get a bit more out of acceleration while in vacuum and as I was testing, for the first time and completely unintentionally broke the traction loose while going through the turn in second gear.
Interesting thought that the traction broke loose with such smooth slide, that it felt Like I was skidding on the icy road in the winter. Like it is not even 70 degrees temp completely and dry concrete surface against sticky 265 Michelin tires. No wheel hope, no jerking or anything, just slid drifted off and then caught on again.

Mysql, man to answer your question about when the boost comes: 3500 RPM is where it is fully pulling in 3rd gear from idle. It goes from vac into boost at around 2800 - 3000 RPM. Just tested it tonight.

I am changing the Int-X boost limiter to 10 psi flat from 14 as I simply do not need any more now, that I make power through the full RPM range, and since I run stock fuel system, I want to insure that i don't over-boost. I have a crappy boost controller, which in 5th and 6th gear will spike to 12 # and then come down to 7 even at the lowest setting. Not good. Need protection.

Next step is to run the vac line that will allow to read the boost from near TB instead of turbo. Maybe that will give me more control.

Brettus

iTrader: (2)

sounds fantastic rotor . Get that video ,we are all dying to see what it can do

rotorocks

I'll see what I can do during the weekend.

I need to find a better location for my oil pump though. Where it is now, recently it begun to rattle as it runs. Must be touching the metal base where it is bolted onto. Very distracting, as in combination with the noise from the turbo, and the exhaust, it sort of sounds like a slight ping. (though coming from the back)

Yes I am sure it is not pinging...

rotorocks

Update:
Moved the oil pump. Different deal, no more rattle.
Made a couple of videos for your guys enjoyment and uploaded them to Google. Will post links as soon as they get approved.

rotorocks

Ok, Here we go:
You can't see what gages read though, as my cheap gauges have too much glare in the daytime.
Also I am holding the camera with my other hand, so I had to shift and steer with one hand while keeping my eye on the road and on the camera view finder at the same time, thus not going too fast.
It is capable of moving much quicker

View of the engine compartment: http://video.google.com/videoplay?do...42508565142451
Revving in neutral: http://video.google.com/videoplay?do...62023329046661
Idling (Back View) http://video.google.com/videoplay?do...63742458210172
Backing out of the drivay and casual drive with no boost: http://video.google.com/videoplay?do...72813555835775
2nd and 3rd gear: http://video.google.com/videoplay?do...97315364690960

Enjoy