Wade

iTrader: (1)

I'm not suggesting anything is wrong with your fuel system or that the PFC is programmed for higher fuel pressure.

I'm just suggesting that since there are probably people who are using your tuned maps, they might actually have a higher margin of safety if they are running higher fuel pressure (about 10% more fuel delivered).

Wade

rx7tt95

I have several dyno sessions where I've produced 330rwhp at .9kg/cm2 ("just" under 13psi, correct?) with stock turbos/engine on completely uncorrected runs, 90 degree plus days in S. Florida. My a/f ratios are still extremely rich, reaching the leanest of, if I can remember, 11.2 by 7500rpm. Below that, it's much richer and really needs to be leaned out to pick up the power just after transition. It's been some time since I've looked at my charts (with the car eternally in the shop!) so I can't pinpoint the a/f to hp ratio. Suffice to say, there was plenty of fudge room to remove more fuel.

I know Rick Cantelupo is working on coverting my maps into .xls to post. Not sure if he's done that yet or not. But I'd love for you guys to take a look. One potential "error" is that when Ray initially tuned my PFC, he didn't adjust the injector pulse correction value % and it registers at a stock 100% instead of 42.3% . My initial tuning sessions indicated an a/f ratio BELOW 10.0:1 to the low 10's...crazy....thought the tuning had just been waaaaay off...guess they forgot to change it. As a result, I took out TONS of fuel and spent hours on the dyno. I did write the original SR fuel maps down before changing them and I may go back to those if I determine that the injector pulse corecction value % would have that kind of effect (causing it to run rich). I have 550 primaries, 1300 secondaries. I hate to waste all the dyno time however. But if it'll pick up the low and mid range, it may be worth it. Anyhoo, I'll try and get the maps up here soon. They're hard to read however, as I can't post them large enough on this forum. If someone would like to see them (chuck?) then I'll email you a very high res version assuming you have a fast connection.

rx7tt95

Oh, forgot to mention, I have not touched the ignition maps in any way. I don't feel very comfortable doing that. Apparently they've been set up for 91 octane, stock engine/turbos.
Michel

Tim Benton

iTrader: (1)

Michel,

Whats your injector lag times that Ray put in for the 1300 secondaries? I have them also, but haven't sent the PFC back to Ray for tuning so I would love to see the maps posted. Hell, just post the data from that injector page the whole pr/sc % page with lag times, that is if you don't mind.

Tim Benton

forcefed1

rx7tt95,
did you happen to take note of your knock.
when driving or dynoing the car what kind of knock values do you get?

rx7tt95

My maps are at work (I'm at home) as I loaned them to Rick and he faxed them back to me...but if I remember off hand, my injector lag time was .04 or something...not sure if that sounds correct, but it wasn't much. I'll make sure to include all the info. I'll swing by work later and pick up the maps and try and get them up later this evening.

Forcefed, as for knock, I've never registered over 30 on the knock sensor. I keep her rich at transition just for safety's sake. Usually, I get say a 17 or maybe a 25 on initial throttle tip in at low rpm's going to WOT. I KNOW I am plenty rich down low, perhaps too rich, as it really feels like a single turbo coming online after the transition. I'm almost 100% sure that the base maps used in my PFC are the Apexi base maps. Ray does not have, or didn't have, the Excel software when he tuned mine. FYI. So that means the number in the fuel correction map is a modified base map number. If you have an XS tuned PFC, the base maps have more than likely been altered.

I definitely give "props" out to Chuck. You're a braver man than I when it comes to changing timing. Following your progress with much interest :-)
Michel
(really too old to say "props")

1RedR1and1RedPEP

I am working on putting Michels maps into excel, ive just been flying my *** off lately. As far as the injector page on Michels maps, the pulse correction is 0.04 on the secondaries. Michel, the hand written data you gave me shows 850 primaries and 1300 secondaries maybe thats why Ray didnt change the injector percentage since the ratio of 850/1300 is the same as 550/850. Does that make sense? Chuck ?
Also, in looking at Michels trailing maps and comparing them to most others, the area from N3 to N12 and between P13 to P20 has unusually large negative numbers the highest being -17 at N4 P14 to N4 P20.
More to follow soon. I will have Pedro Monzons maps up and Michels up very soon.

cewrx7r1

iTrader: (2)

You might be correct, the diff between 550/850 and 850/1300 is very close. In the base fuel maps are values that determine some type of ratio limit for fuel injector timing. Someone with the DATALOGIT manual should be able to explain this as it gives a formular for it. It would be interesting to see his fuel maps.

I am using a +.04 injector lag correction for my 1200s because Ray used that for a friends PFC which he tuned for 1200s.

It seems that part of my problems testing the datalogit that I had mentioned, was caused by my noisy drivetrain due to the colder weather. I have since run 12PSI boost the last few days with the original timing maps and the engine has not blown up yet. I just today have changed my maps to a point betwenn dyno 1 & 2 runs. My J&S is removed as to not cause problems. I am starting to think like others that the J&S for a rotary is crap unless it retards both L&T tiiming at the same time.

rx7tt95

Hrm..he does know that I ran 850's all around...maybe he assumed I was still running the 850 primaries. What I really need to do is get up off my A** and just call him :-) If that's the case (that he assumed I was running 850's in the primary slot) then it means I can't just go back and put his maps back in, sigh...Like I said, I need lots more tuning in the low to mid range AND at lower boost settings. Right now I'm A-OK from 4500 rpm on up, maxing out at 13psi. If I were to run say 10psi (which I plan on doing), I'd be pig rich again.
Michel

cewrx7r1

iTrader: (2)

I received Michel's maps from Ric. They are attached.

From Michel's mod list, the engine block is stock but with all other mods;
intake, IC, fuel, and exhaust.

They have more retard across most of the map and a little more advance in the area of rows P18 - P20 for above about 4000 rpm; compared to what Ray gave most people, including me.

Compared to what XS did(set 5) for an single turbo stock port engine, it has more retard for the area P6 to P20 for N7 to N20, that is about 75%
of the map!

Very strange maps from what has been posted so far. I think you should try Ray's base maps (base mod set) and you should produce even more power.

Your ports are stock, aren't they.

cewrx7r1

iTrader: (2)

Forgot the maps.

rx7tt95

Yes, the engine is 100% OEM as it came in the car as are the turbos. The mods are included in my sig below. I honestly don't feel comfortable enough to mess with my timing and those timing maps are as Ray supplied them to me and have never been altered. Once I get my Datalogit, I plan on loading the original fuel maps back in and adjust the injector pulse correction value to what it should be (.42) and hit the dyno "carefully" with a wide band. Should help clear out the lows/mids and make my car feel less like a single setup and more like sequential twins, LOL. If what you say is true chuck, I should have no problem hitting 350hp at 13psi, stock turbos/engine. Amazing. Rick, thanks for transcribing the maps!
Michel