binz

iTrader: (1)

has anyone installed the power fc in their fd and driven it without dyno tuning? i have not installed it yet, but will in the spring, but can't tune it till probably the summer. any feedback is appreciated.

yuichiror

iTrader: (1)

Read this:
https://www.rx7club.com/showthread.p...&highlight=PFC

The general consensus is that the base maps for the PFC are much LEANER that the map on the stock ECU. Yeah you can run the PFC with out tuning, but just ease up on the throttle. Keep your eye on your boost. If you're like me and like to boost to 10psi+ every so often, just wait on installing your PFC till you can get it tuned. I've had mine for months now(still not installed) getting my car "ready".

binz

iTrader: (1)

thanks for the help... i will wait till my dyno tune to install it then.

rynberg

With minor bolt-ons, there is nothing wrong with the PFC base map, for up to 10-11 psi.

FJDRX7

iTrader: (32)

Yosh come see me i program the PFC for the mods you have

jbrx7tt

Does this include when the RX-7 store does the base mapping for you based on mods? I am in the middle of this as well, I have a cat, dp & just installed my Apexi intake yesterday. Got the PFC and are having a tning session in the next month and a half here in CO. Was unsure of if I should just wait as well. Would you just recommend waiting until the tuning session to install?

How about this one....if it normally runs lean would it make a difference because we have less air here in CO! : )

tphan

With used PFC there is good chance it has set back to default map same as stock ECU.

jbrx7tt

Got mine new from the RX-7 Store, provided my mods list and they did the base mapping based upon those mods.

yuichiror

iTrader: (1)

Really? I keep reading how lean the base map is on the PFC. What do you consider "minor" bolt-ons(DP, IC, CB and intake?)? I guess since I have a streetported engine, that's not so minor. Thanks again Rynberg, I hope my advice wasn't too off base.



I should have the new intake and IC in by the end of the week. Maybe we can get together sometime after that and have a look at programming the PFC. Thanks

rotoober

iTrader: (3)

I've been running mine for about a year with no problems. It's got the basemod map, and the car has dp, hi flow cat, rd catback, asp large intercooler, m2 airbox, supra pump, everthing else is stock w/62k miles on it. I have an el cheapo air/fuel gauge which gives me a basic idea of the tuning: I'm waiting for my wideband to show up this week (still waiting) and then I'll know exactly where it is at. I drive the **** out of the car and have even done two track days. Running about 11lbs. of boost. I never get on it when the car is cold, watch the boost gauge and mechanical h20 gauge like a hawk.

rynberg

The default PFC map is NOT the same map as the stock ecu.

The default PFC map IS leaner than the stock ecu. However, it is still safe with minor bolt-ons (exactly what you listed) at 10-12 psi. You are correct that you should not run a default PFC map with a streetported motor.

dohc-vtec_eg

i got a PFC and my motor is street ported with a lot of bolt ons and it runs fine. GREAT more or less. These guys know more then me but its been 7k miles of ALOT of racing and it runs fine to me. i got a boost controller and its at 12 psi. i DD with 12 psi just in case i catch a race.
dont flame me about my motor is about to blow because if it was i think it would of done that already. Nothign is wrong with my motor and idle is perfect. Car is fast so no power lost or anything of that type i beat Sti and lancers with my seven. I aint tellin you to run the PFC but it worked for me. Im pretty sure the PFC is safer then ur stock ECU too, so if i plan on driving it, i take my changes with the PFC over the stock ecu

rynberg

You're wrong, and your opinion is based on pure imagination and not facts. The FACTS are that the default PFC map is leaner than the stock ecu in some rpm ranges (under boost) and that the timing is much more advanced than the stock ecu.

Just because you haven't blown a motor in 7k miles doesn't mean it's safe. For all you know, you are on the ragged edge and the motor could blow at any time. Also, under the same conditions, one of us poor bastards running 91 octane (highest available in western states) could blow the motor.

dohc-vtec_eg

So the stock ECU will be better? I take 91 to, i'm from cali.

yuichiror

iTrader: (1)

Thanks again Rynberg!

rynberg

If you can strictly maintain boost to 10 psi, then the stock ecu may actually be safer than a base map PFC. However, it's very easy to add a little bit of fuel to the PFC maps to be safer. At the least, I would go to a dyno with a functioning wideband hookup and verify that your AFRs are safe. There is a ton of advice in the single turbo and PFC forums for timing and such for streetported motors. Pretty much anything that Chuck Westbrook (cewrx7r1) says is good advice to follow (except he runs 93-94 octane, so we have to be slightly more conservative with timing and AFRs).

jbrx7tt

So Ryanberg what do you think about my particular situation? DP, Cat, intake & 91 octane - no streetport

Install the ECU when I have the tuning session or just go ahead and install and wait the month without the tune? Thanks for your help & advice...