isoprovophlex

iTrader: (3)

upgrades:
power fc
bnr stage 3 sequentials
full exhaust
meth

im running at 15psi with stock intercooler and injectors. i plan on upgrading both of those and getting a tune.

would i be able to tune the power fc myself having no experience with tuning?

how much would a tune be and are there any places near north georgia?

misterstyx69

iTrader: (142)

Ask another question or two to get post count up,and try the Power FC subsection on this forum.They would be able to help you better!

isoprovophlex

iTrader: (3)

i dont yet feel worthy of the main board, jk but probably. this forum has a sense of monarchy to it. i like it though. its law by the poeple. can i carry a gun in the forums?

RotaryEvolution

iTrader: (30)

15psi on stock fuel system with BNR twins?

:cringe:

upgrade your fuel sooner than later or lower your boost before you wind up adding a new engine to your list.

isoprovophlex

iTrader: (3)

i was told that the meth 50/50 injection would keep it from running lean. the power fc is used buts its not been tuned so that means its not increasing the fuel flow any right? i cant afford a $1000 tune with injectors for a while so i might have to turn the boost down.

btw the engine has 1 mile on it with als seals.

RotaryEvolution

iTrader: (30)

the seals may be the only thing holding it together(for now, although they can handle some detonation and lean burning they will eventually warp). even with the AI and methanol it sounds dangerous on a bone stock PFC tune. your injector duty cycles are probably at 100%. AI is not a supplement for a lack of fuel, lean AFRs will still kill an engine even if you have knock suppression out the ***.

12psi is a modest figure for the stock maps, even that i consider to be the ragged edge after watching AFRs/duty cycles on the base maps with a bone stock fuel system. add in more airflow from the turbos and one redline pull in the upper gears may be the death of it.

you may get by at that boost level up to 6k but in the 8-9k rev range there simply isn't enough fuel for what the engine needs.

isoprovophlex

iTrader: (3)

yeah i dont want to risk it. ill go to 12psi till i can afford the tune.

misterstyx69

iTrader: (142)

I'd be shivering in my boots if I have a New engine and do not know "jacK" about tuning.
Instead of trying to tune it,I would get it tuned by someone you can.
Actually one Step UP would be to get the upgrades and have it tuned Once.(saving you the price of tuning it twice)
If I had no tuning experience I would not risk a New engine testing my theories.

gerald m

The secret to success in this forum is very simple , much the same in as in the real world , Respect your elders so to speak . carrying a gun wont do you any good just get to know them it won't take long to realize who knows and who doesn't .

Proper spelling and punctuation is a real winner here , make sure you tell them your make, model and year and any upgrades when asking questions or they will beat the hell out of you . Most of them are not interested in anything but the Mazda R series cars and rotary engines . In general they really are a good bunch of guys and love to share their wealth of knowledge . Do lots of reading and use the search function when possible . This might help you from time to time http://rx7.foxed.ca/ Welcome by the way have a good one .

RotaryEvolution

iTrader: (30)

most don't even really care about spelling or punctuation, we like to see some homework done or a little effort put into looking for the info you need.

the pointless threads that are asked once a day are what will get you a random sarcastic stab from just about anyone.

isoprovophlex

iTrader: (3)

thanks for all the input. ill just keep my boost down till i can get fuel, intercooler and a tune all at once.

it just seems like a shame having bnr stage 3s and a power fc with no hp gain.

RotaryEvolution

iTrader: (30)

unfortunately you did most things backwards, the fuel system is already at a limit even with the stock twins.

isoprovophlex

iTrader: (3)

yeah the turbos were smoking so i upgraded them. then i found a power fc for 650 so i had to get it obviously.

what do you think is the cheapest i can upgrade my fuel? im looking for a max of 350-400 at 15-18psi. could i just get secondary injectors?

i need a temporary shortcut tune till i can afford a real one.

misterstyx69

iTrader: (142)

half *** anything and it will hand you your whole ***.
words to live by.

isoprovophlex

iTrader: (3)

this is true. ill get a tune. i dont want to force anything and after just rebuilding my engine i dont want to affect reliability.

max0911

iTrader: (1)

You should buy the following:

2x 1680cc secondary injectors
1x Boost controller (mechanic will do the job and isn't expensive)
1x Aluminium radiator
1x Aluminium ast
1x Upgraded intercooler

Then get it tuned. Don't run it in between.

A fuel pump upgrade may be necessary at that power level (350-400)?
Does anyone know the duty the oem pump should be running depending on rpms?

Would a fuel pressure regulator be necessary if the fuel pump is upgraded? (I'm not trying to hijack the thread, I'm trying to bring more depth into it... and post count +1!)

isoprovophlex

iTrader: (3)

ive got a supra pump. pretty sure ive got an ast upgrade and i can control boost with power fc with sequential.

so ive been told i havent driven it yet with the power fc or the new motor. im going to hate the break in.

thats prolly all the mods ill do for quite awhile and work on the exterior.

Sgtblue

iTrader: (16)

Not to beat a dead horse but IMHO don't ever count on AI to save you from a bad tune. Those systems can fail. Get a decent tune and then add AI for additional safety.
I think a professional tune will typically run somewhere in the area of $300-$500ish...depending. An owner can tune themselves on the PFC but you need a datalogit and know-how. Just know that a modded FD at 50% higher boost than stock isn't very forgiving for someone on a learning-curve.

And while I'm not English teacher and everyone makes type-o's, I personally do appreciate a little care punctuation and spelling. The only exception is if English is the poster's second language.....and one can usually tell.

isoprovophlex

iTrader: (3)

sorry i've always typed like this and i've gotten lazy. i'll try to add more punctuation but i just can't capitalize i'm not even sure how.

i know what i must do

this thread should die now

RotaryEvolution

iTrader: (30)

the supra TT pump will be fine for your power goal.

you can leave the stock primaries alone(or at least have them flow tested and cleaned) and add a secondary rail for top feed injectors with some bosch 1680's or ID 2000's.

tuning prices can range a bit, Steve Kan i believe charges $400 for even a basic tune now but he also does it all over the country and has to pay for plane tickets, hotels and food.

i'm one of the cheapest and charge by the hour @$100/hr for tuning(but i rarely take tuning trips). most tunes take no longer than 2 hours even at 20+psi. dyno fees also range from $80-$150 per hour on top of the tuning fee. no tuner will warranty an engine failure unless they specifically built the engine and tuned it and back up their work. so $300 is about the bare minimum to expect for a tune, if you have someone local to you.

Mr rx-7 tt

iTrader: (5)

You need the following:

* Supra pump (I have a used low mileage one if you are interested)

* Secondary injectors (Send your secondary injectors to RC Engineering and have them enlarged to 1300 CC) RC Fuel Injection

* When you run your water inj use a mixture of 50/50 water/meth. (Jet size is important)

* Send me your Power FC and I can drop in safe map for the time being. ( Don't jack up the boost) Pretty cheap $.

You should upgrade your IC as well when you can before you start tuning and turning up the boost.

isoprovophlex

iTrader: (3)

thanks mr rx that would be awesome. i can get injectors but i can't afford an intercooler just yet so ill keep the boost down still. i plan on doing a custom v mount to keep the sequentials responsive.

i still have to put the entire interior back in so it'll be down for a few days (weeks?) anyways.

im pretty sure ive got a supra pump i'll have to check to see when i get the car back next week. if not i am interested.

isoprovophlex

iTrader: (3)

what price am i looking at for the rail and injectors system? i was looking at just getting secondary injectors for around $240 what would be the advantages?

im staying in ohio for awhile soon. im sure i can find someone in columbus that can tune it.

RotaryEvolution

iTrader: (30)

stock secondaries are side feed and i wouldn't say are greatly reliable when reaming them out to flow nearly twice what they were originally designed to flow at. stock side feed injectors are odd and there is limited upgrades(mainly just reaming them out to flow more, 850's are about as large as you will find in stock form for side feeds).

top feeds require a secondary rail(about $125), fittings and lines (about another $100), regulator (about $150) and then your injectors ($200-400).

Mr rx-7 tt

iTrader: (5)

Ben,
The secondary injectors enlarged by RC Engineering are extremely reliable. I have known well over 75 cars that have used them since the 90's and zero failures. There are literally hundreds of members who have used them without incidence on this forum. You hear of the occasional "my injectors failed" but no hard facts to back them up or they got them second hand from Jimmy Ray Joe... There are some stories where they actually flow more than the 1300's but when sent back to RC they said otherwise or they were found to be dirty or old. There was an issue with the first batches they did. After prolonged use they would flow a bit more but that was rectified over a decade ago.

Also the fact all you have to do is remove them send them off when you get them back replace them, you don't even have to dismantle hardly anything, 30 minute job is also nice.