MARTON

Could anyone tell me with the Apexi Power FC upgrade, to a stock FD what are the actual HP gains ? Or apprx ? Thanks.

MARTON

Greddy Exhaust with down pipe and mid pipe, thats it for now. I just ordered the ecu and don't know what to expect.

dgeesaman

iTrader: (7)

On other cars, 'chipping' it gives you direct horsepower gains. There are preprogrammed upgrade ECUs from M2, PFS, Pettit, which do that if you select the right reprogrammed ECU for your mods. The PFC is different in that it's fully programmable.

On an FD, a PFC requires tuning to see improvements - it comes preprogrammed pig-rich to avoid popping the motor. The actual horsepower gains will depend on how upgraded your intercooler, fuel system, intake, and exhaust system is and whether they can handle increased boost.


One benefit of a PFC on a mostly stock power setup is it rids you of the irritating 3k hesitation.

MARTON

what does esp the midpipe mean ?

dgeesaman

iTrader: (7)

You need to read the FAQ sticky thread, especially this particular link (found under 'A' of the useful threads list)

https://www.rx7club.com/showthread.p...threadid=27094

MARTON

THANKS FOR THAT LINK, MUCH APPRECIATED BUT I STILL DONT KNWO WHAT ESP THE MID PIPE MEANS.

BigIslandSevens

iTrader: (4)

ESP the midpipe=espeacially the midpipe

he seems to think that just because you put a mid pipe on you automatically HAVE to add more fuel to the engine... NOT TRUE!! IF you have boost creep issues because of the MP than that may be a wise route to take.( but just adding fuel will not stop boost creep. That has to be dealt with accordingly as well. usually by wastegate porting. A boost controller sometimnes helps but that is not the cure all either)
I have run a # of FD's on the stock ECU just fine with no issues at all. All with full exhaust. One in particular has greddy FMIC, hks DP, MP GT catback. Apex intake. It NEVER went above 10 psi. And THAT is what the limit is.( NOT how many mods you have) IF you start going over 10 psi boost you will need to compensate for that accordingly.

The Biggest gain you will get from the PFC is reliability. You can check sensors easier, moniter engine settings, and when you add more fuel and power mods, The "fine" tuning is what will give you the power. Just plugging in a PFC does not add up to instant power. It is a starting point and was intended as that. A place to start tuning from.
One of the best things about it is being able to rid the rats nest from the equation without having resistors all over the place. really makes things easy and clean.

dgeesaman

iTrader: (7)

esp is short for especially

Dave

MARTON

Ok you say "add fuel" what do you exactly mean by that. Thanks

BigIslandSevens

iTrader: (4)

bigger injectors so that "more fuel" can be added into the engine.( If more air is put/forced into the engine, accordingly more fuel needs to put into the mix as well.) You can raise the rate on the stockers but only so far. Then the safety barrier of running injectors too high of duty has been broken. So you upgrade to bigger injectors. Then tell the PFC what injectors you put in and change the lag time etc.. for the injectors. There is alot to learn. So go read the links above and the FAQ. As well Rob Robinnette's site is a good one to familiarize yourself with the needs of the car.

MARTON

You just sold me a fuel upgrade package from the RX7 store. Thanks for your help!!