Mr rx-7 tt

iTrader: (5)

and did the dyno ever take place..?

badass7

Alright, I scrolled through all the opinions and speculations of people trying to figure out Rikki's #'s to see what happened at the Tim B./G.Monso Dyno run. Where and when is this going to take place? Damn thread had me up to 5:45 in the a.m. hehe ! I'm hitting the sack now. Hope to see the new Dyno #'s up soon.

RTS3GEN

Nice numbers Rikki. I have an extra PFS PMC that Peter just reprogrammed(ie put new sticker on) that blew up 2 of my friends motors, any of your friends interested in buying this thing? I know this should be in the for sale section but....Red RX7 made 341hp on stock twins and a mild street port Pettit motor a couple years ago. This was in sequential mode and AFR's in the 11.2 -11.3 range with a haltec. He subsequently went to a T60-1 and blew the motor apart(and turbo). Never made 341hp on the dyno with the single. I buy the numbers, but I'm not so sure that was at 11psi. I have all the bolt ons and at 11psi the best I've managed is 332-336hp. But a jump to 13.5psi-14psi mine made 342hp and at 15 made 357hp and 308torque. Like I said, believeable numbers not so sure of the boost tho. Impressive nonetheless. Let me know if anyones interested in this dumbass purple pos(pms).
Art

streetraceseven

he says he ran race gas... add race gas add timing = Horsepower. no big deal

nice numbers i have pretty much the same setup and am going for 330 rwhp... i let you all know the results on my dyno.

badass7

I've heard nothing but bad things about the PFS unit until reading this thread. Seems like it takes a lot to tune it right. Bringing it in to Peter Farrel himself is prolly the best way to go if you're lucky enough to live in the area. So....what was the cause of engine failure on your 2 friends motors ? Was it bad tuning....well obviously....but what exactly happened?

the_glass_man

iTrader: (2)

Don't be a Rikki while drinking your juice in the hood!

artguy

it is easier to have improper tuning on a unit like the pfs which only has 8x8 resolution on the fuel map(i could be wrong about the exact low resolution..but it is low)

a pfc has 20x20 resolution...plus the base maps...

and a haltech is over a thousand points of resolution if i remember correctly.

so realize that...rikki has a great car...but that pfs unit is old and low res....the pfc is better but not much...and the haltech is even better than the pfc in terms of resolution and control.

the pfc has the ease of use thing going for it...same with the pfs I assume.

if you only have 8x8 or ten by ten resolution then you are not getting fuel where you need to. its like trying to drive across the USA with a roadmap that only lists the major cities...you can do it but you better not run out of gas between cities...if ya know what i mean.


jason

PS...glassman...that made me laugh...lol

SPOautos

The PFC has WAAYYYYY more resolution than a pfs!!!! Its PFC is closer to a Haltec than a pfs. I might be a little off but I thought the Haltec had a 25x25grid where the PFC has a 20x20grid. If you consider that out of the 8 load levels you can set for the pfs at least 3 have to be for vacume which means you only have about 5 tuning points when your under boost!!!! Thats not at all what I would call fine tuning!!!! No wonder he tunes with race gas lol......which like someone else said it prob how he made so much power. With the race gas you can run more timing which to a point will get you more power.

The new Haltec E11 has 35 tuning points!!! I've got a friend installing it in his car as I type!!!! Cant wait to see it in action.

STEPHEN

ptrhahn

iTrader: (9)

The real problem w/ the PMC as opposed to say, the PFC is the boost control... I had a PFS PMC on my car for several years, and it never blew my motor... poor fuel maps will blow a motor on any computer.

The reason it tends to "eat" motors is that the boost control is not fast or smart enough to allow for variables like major changes in temperature (like we get here in VA) or boost creep. 65 degrees one day, and your right on 12 psi... fire it up a week later and its 30 degrees? 17 psi. And it'll take 4-5 baseline runs for it to "learn" to turn it down again. I developed a boost leak at WGI last year, and the PMC "learned" to turn the boost back up to 10 psi during the session while i was concentrating on other things. Once i fixed the leak, i was seeing 20 psi on "low"! Theres no way i was going to do 4-5 runs @ 20 psi for the thing to figure it out... "low" was rendered basically useless and i had to switch to "med". That sucks.

Many other folks have had hard to trace 6500 rpm cutout problems at the track w/ the PMC, and frustratingly havn't got much support from PFS on. Most just sold the unit. I had no such problems.

BUT, by the time i would have band-aided the thing w/ a profec B for boost control, bought a keypad and interaq software, and dropped big $$ for Mr. Farrel to provide sketchy support, I thought it was a better investment to get a more comprehensive unit in the PFC, with an understandable keypad with display of temps and such (big advantage), better support, rock-sold boost control in all conditions.

Other than a few shortcoming it wasn't a BAD unit, i liked the 3-position setting that i don't have w/ the PFC, and i DO feel that my car ran a bit faster @ the same boost setting with PFS's "guesti-tuning" than w/ SR's guesti-tuning.

Dragon

I'm not very familiar with the haltech, but can you do timming split between leading and trailing plugs?

also, if you have the Datalogit with the PFC you can do pretty much anything you want.. still a 20x20 map, but you can adjust injector transition, throttle position, water temp fuel adjusment, and a lot more that will give you unreal resolution once you see all the other things hidden in there that you can't get to with the commander..

artguy

it may interpolate between them...but highways between cities dont always run straignt between the dots. your computer does a lot of GUESSWORK while it plays connect the dots to get that map in there. I dont know why anyone would want to get that unit if they are doing heavy modifications. the car is finicky enough without the computer estimating where fuel is needed between points to that degree. the pfc does the same thing and you get triple the control nearly. the haltech more...the motec even more.


point being...the 8 bit pfs (it is old 8 bit tech right?) is not nearly as accurate as the other two engine management systems.

rikki...I like ya..nothing personal...just that that pfs unit is outdated and you know it.

everyone else knows it too...so defending it only makes you look like a donkey. yee haw!...no wait...it makes ya look like a dinosaur.

my sister ran a 486dx 33mhz til last year....it did the job...but it was slow and she couldnt do all the things the newer machines could. it ran her tax programs at least LOL. she defended using that thing too...but eventually she UPGRADED to a current machine with all the goodies.


j

the_glass_man

iTrader: (2)

How much does the Purple Motor Eater go for these days anyway???

rxrotary2_7

haltech has it.
yes you can do a split.
let me try to remember some of the maps...
coolant corection
fuel (staging of injectors)
ignition (timing and rotary trailing)
air temperature map
battery voltage map
primer map
ignition cranking map
ignition cooling temp map
zero throttle
full throttle
barometric corection
calibrating the throttle
throttle pumps
there is tons of **** you can do. other outputs like thermo fans, shift light, dual staged rev limiter.... the new E11 does more...

artguy

glassman you are on a roll today!

LMAO

rikki...you need more than five in boost if you want to have an accurate map. the pfs unit is NOT capable of fine tuning. It is capable of adjusting the fuel but it is not nor will it ever be accurate to the degree the more current systems are.

thats why most guys who do mods and have that pfs unit end up selling it and going with the pfc or the haltech.

if the pfs unit is so great whey doesnt abel iberra or ray lockhead or hahahhahah....exactly.

its like a childstoy compared to the others...a gameboy in the world of playstation two and xbox.


j

rxrotary2_7

seriously rikki, this is one item you should not defend. we all know that you are in love with PFS.
if someone these days were in the market for a game system (is that what it would be called?) do you think they are going to get an atari or a nintendo? i think they may go with a newer more updated system. YES, you cna play games on the older ones, but you can play better games on the newer systems. that is my take anyway.

Kevin T. Wyum

Was kind of a funny thread to read through. The one thing I was a bit surprised by was the statement that he made no additional HP at higher boost but the torque kept going up. Of course that really just means he produced that same HP at a lower RPM since HP is a function of Torque and RPM. I'm not that floored by the numbers since I remember running 12.6 with nothing but a crush bent 3 inch pipe in place of the main cat and cat back.

Anyway what you described about the torque and HP does agree with your turbos being on deaths door beyond 11psi. My personal experience though doesn't really back that up with respect to the OEM turbos. It sounds more like a different compressor/turbine combo with an extremely peaky effiency map at 11psi.

Kevin T. Wyum

jdhuegel1

This is the only REAL problem I have experienced with the PMS. And it wasnt noticeable until I upped the size of my intercooler.

When the temps went from 60 to 38 here... I saw 2lbs of boost.

(Would a manual controller help this?)


Oh, and I see just as many people pop motors with th PFC..

Dragon

Sounds like all the same **** in the power fc once you get the datalogit + you get to data log

SPOautos

Thay all "interpulates between them all" The differance in the pfs only has a total of 64 tuning points to interpulate between while the others have 400 (PFC) or more.

STEPHEN

SPOautos

Sure you can pop your engine with a Motec, they dont come tuned. The differnce is in the hands of a capable tuner the power FC or Haltec has much more tuning points meaning you can control the fuel and timing to a much greater degree. One "cell" on a PFC covers 400rpms and about 1.5pri of boost. On a pfs is covers I'd say about 1000rpms and 3psi of boost. You just cant fine tune it as well.

This doesnt even get into all the other multitude of features the Power FC and Haltec offer besides fuel and ignition.

STEPHEN

jdhuegel1

Ok, gotcha. I've never used anything above the PMS. Never needed it (to my knowledge)

Thanks!

yzf-r1

iTrader: (1)

The reason it tends to "eat" motors is that the boost control is not fast or smart enough to allow for variables like major changes in temperature (like we get here in VA) or boost creep. 65 degrees one day, and your right on 12 psi... fire it up a week later and its 30 degrees? 17 psi.

and what boost controller is "fast or smart enough"?