foreignracer

iTrader: (2)

This is the set-up I am going to be running in a couple weeks
-Pettit racing stage 2 ported motor
-underdrive pulleys
-downpipe
-bonez high flow cat
-Greddy cat back
-stock twins
-Pettit Racing intake

My question is with these mods, am I going to need to have Apex Power FC & Commander to get the right fuel air mixture correct or will the computer adjust enough to keep the car from running lean? This motor is going to be freshly built and running it lean could be a very costly mistake. Gracias Amigos.!

Oh, if any one wants to trade for the Greddy exhaust ( has the 5" outlet ), I will will consider things that look close to stock or don't look so ricey!

TurboTagTeam

Most certainly. It should be at the top of your list. You don't want to blow up tht brand new engine!!!

chinaman

I agree with Mr. TagTeam

Trout2

iTrader: (5)

The computer won't compensate for the additional air flow or port timing changes. To be on the safe side, keep boost at 10 psi or below until you can get a Power FC and tune it using a wide band.

Jack

silverTRD

iTrader: (37)

^agreed^

ZumSpeedRX-7

iTrader: (12)

nobody told you you would need a computer when you picked it up or bought it?
just be careful until you get it. Ari Yallon at RX-7.com is a good guy to get the Power FC from. good luck

foreignracer

iTrader: (2)

Thanks for the replies. I guess I am going to spend some more money and pick up an engine management system.

mad_7tist

what are your future plans? pettit ecu would be perfect for you

SINxSELEKTAH

iTrader: (2)

agreed as well...i read that a Power FC is needed even after 2 upgrades (ie. intake & exhaust) "The power fc comes with a basemap that is setup for Intake, Exhaust and downpipe. If you are running more mods than those we recommend a different map"

mad_7tist

and you have read incorrectly, as long as the boost is stable and controlable at 10 psi the stock ecu supplies plenty of fuel

rotaryinspired

iTrader: (3)

I would get a new ecu w/ a ported egine. Sure it might run ok on the stock ecu, but it is a matter of time until you go back to get that engine done again w/o it. Why? The porting changes timing and allows better airflow even at 10psi. That is why it is faster w/ a streetport. Why chance it? Whats another 1000 after you have spent at least 4000. It will save another 4000 in the long run. Just my .02

Jodeny

iTrader: (3)

The motor is PORTED. THis give you a much smaller window of error if you accidentally overboost past 10psi. Get a PFC before you use the car. It will save you money in the long run. You will have to get a ported map for the pfc too.
John

No-Pistons-TT

yup its pfc time check ebay if you worried about price

willjs7

iTrader: (1)

u gotta pay to play. , u wont be sorry that you bought it, if u do go with power FC, it is flawless in my books

mad_7tist

say bro i was responding to the guy who quoted that a pfc is needed after 2 mods. which is Wrong as long as boost is stable at stock levels.

now as for the thread starter's engine yea it is ported. but if you are not going to run more than 10 or so psi through it well the pettit ecu should work just fine. call cam and ask him what he thinks... he gets a pfc now it needs to be tuned to be worth a ****. this may or may not be worth the hassle. the goals for the car are important to decide the systems on the car

foreignracer

iTrader: (2)

I guess I am a little confused. Are you saying that I need the PFC or not. With my current engine, I am boosting about 12 psi with out the downpipe and high flow cat on. Does the PFC come with maps or can I down load them? Or are they a separate cost? Ebay has a couple for $690. How easy is the PFC to use?

-Corey-

Jodeny

iTrader: (3)

You need a pfc for engine safety and they dont come with ported maps. You can have someone come and tune it for about an extra 450.00- check the tuning threads..you can't access the base fuel maps so whatever settings you read about on the forum do not apply to your engine. NOTHING on these cars come cheap........
John

foreignracer

iTrader: (2)

I decided on going with the Pettit ECU. With the mods that I am running and keeping the boost under 15lbs, this is the best option for me. I have heard of some problems with the Apexi FC, breaking, sending it out, and waiting MONTHS to get it back. Pettit is a phone call a way and they are awesome. Besides, I do not have a relaible tuner(or at least one that I would trust) within at least 8 hours of me.

Pettit stage 2 ported, Pettit ECU, Pettit intake, Pettit high flow cat.....winning combo!!!

oorx7

iTrader: (2)

Sounds good to me. I ran the pettit ECU for many years with no problems at all. You might whant to add in an upgraded fuel pump. Just my $.02.

Montego

iTrader: (1)

bah...

My previous mods:
Streetported Motor
M2 CAI
PFS SMIC
DP
MP
Walboro fuel pump
stock catback
STOCK ECU
Boost set at 10 psi... no higher!
Ran like that for over a year WOT every chance I got.

Then I got a maganflow muffler. Ran that for about 1 month WOT too before I purchased a PFC because I wanted to run higher boost levels not because I was afraid of blowing up my car.

Montego

iTrader: (1)

better get that boost down back to 10 psi.

Jodeny

iTrader: (3)

2000 posts from you and ........ THe stock catback is VERY restrictive, I ran the same setup at 12 pounds- whooopie.......until the casing exploded and split open like a banana. This clown that needs advice is going to have one boost spike and then pay 2 to 6 grand on a rebuild. Let's try to think ahead here, he needs a pfc with a rich map to protect him from himself. He's already planning on running 15 pounds with a pettit and boasting how it's THE setup to run. Can you say "stuuupiiid?" Maybe he got this idea that the pettit is fine and the PFC is all about 'problems'- (once again I giggle my *** off at his ignorance) from all the great 'advice' he's been getting in this post. We all know the stock ecu is pig rich with a medium ported motor but most of the clowns on this forum don't have a clue how to change a spark plug. Then they decide to try to 'work' on their own cars, all the while borrowing their dad's tools and then they get a boost spike. They then blame it on whomever their mechanic is and moan about how delicate these cars are...blah...blah. Or they figure- I'll run 11 pounds of boost, whats one more pound ... I try to think ahead and give SAFE advice, these guys look for any small reason not to spend money.
Continue on,,
John

foreignracer

iTrader: (2)

I apprieciate the fact that you think you are an expert in the field of rotary motors and every one else are idiots. First of all, I am no kid buying his first RX7 to street race with. This is my fifth 7 and I currently own a 2nd gen N/A. I picked this car up in November and have not made it through a tank of gas when oil started pouring out. The only rotary mechanic in the area works at the Mazda dealer here. This only idioicy that I claim is not having the car compression tested prior to buying. After having Mazda compression test it, I found out its border line good which I do not consider worth putting 2G into seals versus the $3200 for the ported rebuilt. I do not plan on running 15lbs of boost. I am saying the Pettit ECU will support up to 15lbs which gives me the option of running that much. I do not plan on changing out the stock fuel system which will only support up to 15lbs of boost. I will run a much more conservative 10 - 12 lbs.

Now, let me see. I could talk to Pettit Racing who has been building sucessful rotary race motors for years on the advice that they give me or I could listen to an idiot like you that ran a street ported motor with the stock cat back exhaust and blew his motor. Hmmm......does not seem like a tough choice to me!

Pettit in no way tried to sell me up on anything I purchased and believe me, I am deffinitely not looking for a way to be cheap about things. I am doing the swap and upgrades my self with my own tools(not daddy\'s) since its been about 11 years since I lived in my \"dads\" house. The PFC is not the best way to go for me since I do not have a reliable rotary tuner in any near distance and I am not going to let some \"clown\" like you who says he works on rotarys\' all the time try to tune something they know nothing about.

In conclusion, my suggestion to you is to keep your proclaiming \"clown\" comments to yourself or get yourself a pair of reading glasses that help you understand what is written in front of you!

Jodeny

iTrader: (3)

LOL= ouch. good luck, having owned 5 RX7's I figured you'd know more. Why ask advice if you have no intention of taking any. If you cant afford a PFC, just admit it. ...I

As far as comprehending what you read- where did you read that I blew my motor running a stock ECU?? The petitt will support no where near 15lbs on a ported motor- you need more injector for that Einstein....duh

Comprehension fact #2- most of my post ws not directed at you but whatever.

If I am a clown, I don't know what that would make you but I am the one clown that you should have listened to.

Maybe you should go back to a 2nd gen- they are for simpler folk

...and where the heck is oil pouring out of?? That doesnt mean your motor is blown, and besides, when checking compresion on a ported motor, you usually get lower readings but I guess you already know that.

Have fun with 290 rwhp.

oh- and the stock computer doesn't adjust, but you already know that.

next time if you don't comprehend- I'll try to type slower...LOL
Still wearing my big red nose and big red shoes...
John

CantGoStraight

Actually the Pettit ECU will work for above stock fuel levels as well as with the ported motor, all you have to decide is if you want the unlimited ECU or the one that retains the factory rev limiter and fuel cut.

Cam feels that 12 psi on pump gas is fine, feels that at 12.5 leaves too little margin for error on pump gas and only 14.5 with race gas. 15 psi on race gas is closing in too close on the stock fuel sytem capabilities. I should have read further down the post before I put this in as it looks like he is going the Pettit ECU route.