gxlspeeder

okey dokey, ive got a 87 t2, im putting on a full exhaust next week, and an cone filter. i possibly might be getting some better tires also. how fast do you think i can jet down the 1/4 mile.

koukifc3s

iTrader: (3)

did u get some fuel mods?
ur gonna run very lean with that setup

Madrx7racer

with the right driver the TII should break 13's.....but get some fuel mods before you blow the motor.....look into an FCD.

Terrh

iTrader: (7)

without more fuel.. high 13's, once... after that... mid/low 28's on one rotor...

gxlspeeder

so would upgrading my injectors and fuel pump be enough, i already have an fcd, and planning on a haltech ems probably next winter. will aftermarket 550cc primaries and 720cc secondaries and a walbro 255 be enough fuel mods

pip

For now just go with the walbro 255 and rewire it, and get a nice afm and egt guage. If you are still running lean (which you almost certainly wont be) get the 720s and get the 550s cleaned and blueprinted.

Aaron Cake

iTrader: (1)

Stock primaries are already 550CC. But just installing 720CC secondaries and the Walbro pump should be enough. If you find that you bog once the secondaries come on, you should look at an S-AFC to tune them down (or live with it until you get the Haltec).

Madrx7racer

lol........I recomend an S-AFC......Dynotune is important too.

AdAm87TuRbO2

would just a fcd and safc be enough?

Avatar

13's out of an stock setup + exhaust and air pod... stock pi$$ing in his pocket! A brand new stock TII runs 15's 1/4 mile with a half decent driver, a full exhaust does not make over 1's difference to your 1/4 mile time.
You will more than likely run mid 14's at best with the mods you have listed so far.

Add the other fuel mods to the car and more boost and you might break 13's...

87RX7TII

I have an HKS filter with a RB exhaust and an underdrive pully (which I know does practically nothing)... but should I REALLY be looking into upgrading the fuel system!?... the car shouldnt be pushing that much more power off of those mods... on an s4 stock 182hp + upgrades is more like 190-195hp... Cant the stock car manage that or should the walbro be the first thing I look into getting?

Avatar

depends on what boost your running, if it's less than 10 psi with FCD then your fine, just rewire the fuel pump. I was running that way for about a year.

If you want to upgrade your pump and injectors, you should replace the ECU so you can get more out of all that extra fuel your throwing in, you'll also reduce the amount of parts that will eventually die from running rich (like the O2 sensor).

Rxmfn7

iTrader: (4)

Many people have run mid-high 14s out of completely stock (down to the paper filter) Turbo2s. With just intake and full exhaust( as well as a upgraded pump and a FCD), high 13s is definately attainable.

jacobcartmill

iTrader: (6)

i have a walbro and an SAFC (as far as the fuel mods go) and i ran a 13.8 with a 2.0 60ft and 12 lbs.

mine gets a little lean in the midrange (~12.9:1 AFR's) around the primary/secondary load split, but i have plenty of fuel for the high RPMs (also cause of the S5 boost bleed thing)

i actually tuned the RPM range to ~11.0:1 AFR's and the SAFC is LEANED OUT 5% by 7000 rpms. with no correction, my AFR's are 10.0:1 by redline with the stock injectors and a walbro fuel pump. i have the safc maxed out in the midrange where it is hitting 11-12 lbs, then the boost bleeds off to about psi.

but yeah, if you have a full exhaust and intake you're gonna hit around 10-11 lbs which is definitely too much for the stock fuel pump. i'd recommend getting a walbro fuel pump (~100 bucks new) and an SAFC (~150 bucks used) and safely run 13's all day.

gsracer

I ran a 13.8@101 with full exhuast, walbro, fcd and a cone filter.

azsuptt

I recently Blow a motor after rebuilding it, I was doing over 12 PSI, Both times blew while going in third shifting to 4TH I dont believe I have a FDC (looking for one) and no Fuel upgrades

1) So I need a Boost controler(Does Manual is Enough?)
2) FDC, Where can I buy one? Wich site?
3) Fuel Upgrades, Walbro fuel Pump, Any others and where to buy them?
4) What is a SAFC?
5) Does buying a Halteck will controll all of this or I need something else?

Later...

phatmonky

1>Manual is fine. Do a search. Everyone seems to have their favorite.
2>FCD - Fuel Cut Defenc(d)er - search for purchase information, or here's the fc3s link to a DIY http://www.teamfc3s.org/info/articles/fcd/diy_fcd.htm
3>fuel pump and a dyno first. Go from there.
4>SAFC = an Apexi air fuel controller. Google is your friend, as well as ebay on this product. Allows basic piggy back fuel tuning.
5>Haltech will do fuel and spark, but I'm a little rusty on boost control (been a bit since I did my research). If I remember correctly, it will only handle boost to a certain point without changing to a different MAF. Someone clarify?

azsuptt

Thanks...i will sure do...

So Its safe to say I blew the Motor because I didn't have enought fuel, and the computer stop sending fuel to the rear rotor, Both time the same thing happen I need to fix it before I punch it again....

What is the Boost Bleed, Are you talking about a manual boost controler with a TMod to stop boost from rising above 10 or 12 PSI?

igottafc

iTrader: (6)

you mean AFM?? with haltech setup u dont need an AFM. You program your own fuel curves there for it doesnt need a signal from the afm to change values.

Madrx7racer

1) You don't need une unless you plan to boost 12 psi.
2)www.mazdatrix.com or http://rx7.com/store/rx7/fcfuel.html or http://corksport.com/main.php3?primN...3Fcat%3D273174
3) same as above
4) Super Air Flow Controller.......can be purchased at the same sites above
5) If you get a Haltech you will not need the S-AFC You controll the injectors, and the air to fuel ratio and some other stuff I am not too familiar with.

bcty

i would reccomend that all T2 guys take off their exhaust manafold and port the crap outta the wastegates.. THIS IS A MUST With full exhaust and a cone filter you will probally be boost creeping.. port the wastegate so at least 75% of the hole is covered by the flapper and your set..

sirx7

do u need a FCD if you have modified ecu

sirx7

do u need a FCD if you have modified ECU

Digi7ech

iTrader: (1)

Well it depends on what you mean by modifed ECU.

If you got the Rtek7 then it has removed the Fuel cut signal so your base maps will work above the 8PSI.

If the fuel cut signal was not removed and they only modified the fuel maps then you still need a FCD.

Also AZSUP.
A boost controller does not limit how much boost you get. It actually raises your boost by messing with the pressure the Waste gate see's.

An Apexi SAFC is a popular Fuel signal controller. It will change the fuel signal to the injectors so it can remove or add more fuel over the stock signal. It's a piggy back system and commonly used for semi modded cars.

A Haltech,Microtek,etc are full engine management systems. They will need to be professionally tuned after you install it and it takes over as the main computer for the engine.(You toss the stock ECU).

This is a $1,000 item. It is more efficient than a SAFC but you can tell why the SAFC is more popular due to the price.

AdAm87TuRbO2

I called Racing Beat about porting my wastegate, and the guy said" Please, please for the love of god do not port anything"

Since no one has said I'll ask again would fcd and a safc be fine? I guess a walbro is a must right?