rzograbian

ok, i have a question if these following mod's will be safe for a few month's on a stock ecu til my new PFC arrives?

srteetported engine with 4.5k miles (using RA 2mm Seal's)
HKS intake
Downpipe
Midpipe (going to use for only one weekend, i have a stock cat)
Exhaust
stock fuel sys
Blitz FMIC
Flyidine Rad.


umm, thats about all that matters for performance.... oh, and a Manual Boost controler at 10psi...

i was wondering if with all those mod's and boost kept at 10psi, how will the motor take it??? i can lower boost down to 7psi but dont really want to

i have searched about this and know approx what can/cant be done but none were exactly the same setup as mine so i ask!!!

Thanks For all The Help!!

SpeedKing

iTrader: (4)

Haha, the question is, how much self-discipline do you have? Drive like an old lady - shift @ 2K in every gear, *NO* WOT punches, no problem.

Tom93R1

iTrader: (2)

It only takes one big detonation to kill the motor, is that something you want to chance? I wouldnt put the mid pipe on at all until you have the PFC.

Montego

iTrader: (1)

Just leave the midpipe out. Boost till 10 and you should be fine.

I asked the same question a few months back. The concensus was that I should be ok, but why take the chance with a midpipe?

rynberg

As the others said, leave the stock cat on. You should be fine at 10 psi.

PVerdieck

Only at 5psi or so. Anything else is just stupid.

So answer these questions:

Do you want to be stupid?
Do you want to risk blowing your engine?
Do you want to rebuild your engine?
Why are you asking this, when you already know the answer?
Do you think you will really get approval for this when you know it is wrong?
How many uninformed people telling you it is okay, will it take you to risk blowing your engine when you know it is wrong?

Klar

Stock ecu+street port=one more engine. The stock ecu can barely keep up with basic upgrades, and you want it to manage fuel on a street port?! You can, but like others have said, drive it like granny.

rzograbian

ummmm..... Klar, i dont agree with you.. i have been dragging the car with that stock ecu and nothing has and will happen... the stock ecu is more than capable of running a mild streetport because you are not advancing timing or adding more fuel.....

thanks guy's, i needed a good reminder!!!

Klar

Its the airflow that becomes the problem.

Montego

iTrader: (1)

It's actually been documented that the ECu will compensate for the added air if one stays at 10 psi. But the thing is that if one adds a midpipe things get a little scary i.e. boost control issues.

Klar

Street ported though...

rynberg

WHERE? The stock ecu does NOT compensate for additional air flow. However, the stock ecu runs so pig rich that you can add practically any modification and have safe a/f ratios at 10 psi.

It's true that running a streetport on a stock ecu is not that good of an idea, but it's most likely fine with a mild port.

CantGoStraight

I'm damn sure confused......I saw a pretty good list of mods and two isn't hard to count up to......Hell go ahead and do I want to know if it's true. Your motor will survive on all these mods and not blow up on the stock ECU ! ! ! !! Let her rip.

Tom93R1

iTrader: (2)

The stock ECU only measures air pressure with the manifold air pressure sensor (MAP). It has no idea what the actual air flow is, so it was tuned for stock levels of airflow. As rynberg said, it is rich enough to handle a few mods without problem but it sure doesnt "compensate" for additional airflow. You need a mass airflow sensor (MAF) to do that.

Montego

iTrader: (1)

Learn something new everyday.

KaiFD3S

iTrader: (37)

good luck, keep that foot off the gas pedal...lol...

rzograbian

haha............. that was what i was just thinking!

CantGoStraight

Common go for it.....10 pounds just like stok.....Do you have a different air in take or the stock air box......hell that will probably limit the flow enough for it to work. ZOOM ZOOM....pow !

SteveF

You have bigger ***** than I do..I have a K&N drop in, gotham downpipe, and will be purchasing an RB exhaust in the near future. I would also like to do the Adam C "cheap bastard" intake mod, but I am worried that it will cause me to have a big headache (AKA rebuild that I don't really have the money for!).


Steve

seanfd3s

http://www.rx7store.net/index.asp?Pa...ROD&ProdID=779

is this a good thing to get? or will it not be needed if you run pfc

tlehnen

You have nothing to worry about. Got the cheap intake plus much more on stock ecu and it is dreamy....Keep boost at 8-10.