hello! i just got my 1995 rx7 fd3s....before i had an civic with integra motor....
The car is stock ,except that it has an exaust system which i must check its diameter.

I am up to reach around 320 hp....without internal modifications
How can this be achieved??

I had on my mind these:

1) a better intake for the 2 turbos
2) change the air filters and put some HKS ones....
3) A larger downpipe
4) A larger intercooler if needed
5) larger injectors
6) An ECU , probably greddy E-manage ultimate
7) a wideband to look my air fuel

Can i reach 320hp safe with all these?
can u suggest me sizes (injector size, downpipe size, a good intake etc) and if the E manage ultimate is good for this? or should i go get something else?

is there anything else i should get to be safe??? what s the air fuel ratio i should be having to be safe? thank u

 

hi teri,

general rule of thumb is if you do any three power mods, get an ECU to adjust fueling. I'd move the ECU up your list just to be safe.

Also, please check the stickied FAQ on the top of this forum for the "reliability mods". these are essential to increasing the life of any FD.

Congratulations on the new car.

 

The general rule is as long as you limit your boost to 10psi on the stock twins, you can do all the bolt ons you want. Beyond that, you'll need to be able to adjust your fuel (aftermarket ECU). If you want to use bigger injectors, you'll need an ECU that can handle them.

Here's a fuel/power calculator:
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

Most of us go with the Apexi PFC for an aftermarket ECU. Easy to install and very configurable with a datalogit.

 

my general rule of thumb is that there isn't really anything that is "bolt-on" on an RX-7. even with a cat-back the car will start to lean out. the ecu should be one of the first things you should get so you don't run in to problems b/c unfortunately, every one of these cars will run a little different. and in the ECU department, i'd fork out the cash for a Haltech. you'll be overwhelmed at the capabilities of the E8. the greddy is a piggyback, you'll want a stand-alone for further tuning adjustments.

 

thank you , but before i add anything i wanted to get ALL of the above and then make my moves!!!

so ofcourse i wouldnt add anything without installing a wideband and an ECU and big Injectors , to be safe not to run lean....
So i should better go with the power FC e? ok.... do i need a special harness for that?

now some simple questions for the cars specifications:
1) the stock injectors, what cc are they??
2) the stock turbos , what psi they run to , and until what pressure are they safe to run to if i have the ECU and 1000cc injectors installed?
3) is the stock intercooler enought for lets say 350 hp?
4) what air fuel ratio is safe for this car? for a turbo civic b18c for example it was good to have it 11.5:1 ...

i know much about modded hondas, i was drag racing in greece, but i dont know anything about the NEEDS of an fd3s....

Thanks a lot for ur time

 

1) 550cc primaries and 850cc secondaries
2) 10psi (approx .7 bar).
You can run them up to 1.0 bar AFTER you've done fuel/ECU mods so that you don't lean out.
3) NO.
4) Not sure, do a search.

 

i ve been reading all day the reliability mods.....so these are the things i ll do....tell me sth else if u think i m rong:

1) get an ECU , power FC probably , and a wideband to check the AF
2) get a larger intercooler , and a downpipe
3) perform the cooling fan mode
4) i have a boost gauge , so i ll get a water temp one plus a turbo timer

i ll do all these together and then i ll go to a second oil cooler and a bigger radiator.

after these i ll tune it up and go to 14 psi....

If i am about to exceed 80% duty cycle of the injectors ,this means i should get bigger ones....But wich ones should i change? can i just get another set of 850s to replace the 550s or is it needed to change ALL 4 of them with bigger ones?

 

I recently had my car tuned by Steve Kan. I hit 287hp with stock twins on stock fuel. I have a wrapped 3" DP, Borla MP, RB dual as well as a M2 intake and Greddy SMIC. I was running an M2 ECU until I installed the PFC.

Steve tuned it to 12psi. He told me my limitations were my secondary injectors, that a larger IC would help and an ignition Amp. If I got these three items done he said I could easily hit 325 on the twins.

For the stock twins the stock 550 primaries are fine. Its the secondaries you need to upgrade. Some people run stock 850's bored out to larger rate and have no problems but the safest way is to buy larger injectors which will be top feed and you'll then need the accompanying fuel rail and FPR.

FWIW It's commonly accepted that the safest psi for the stock twins is 12 psi. They can go upto 15 but you're burning the candle at both ends.

 

if you got a pfc the water temp gauge isnt really needed

 

thank u all
anyone ever installed Unorthodox racing underdrive pulleys? i had some on my civic , and i saw they r also a set for fd3s....are they good and safe to use them?
i was really satisfied with these on my civic

 

Here I had my car tuned in Feb. by Steve Khan and I made 322 @ 12lbs here are my modifications at the time as far as power adders. I would do reliability mods first, Silicone hose job, aluminum radiator, aluminum AST, replace thermostat and fuel filter, then move to power adders.

550/1300 Injectors
Sard FPR
HKS Twin power (Ignition AMP)
MSD Wires
Greddy Pulleys
Greddy Elbow
Power XS INtercooler
Greddy Intakes
HKS Downpipe
Straight Midpipe
5 zigen exhaust
PFC+commander

Hope that gives you an idea I pulled the 322 with about 32 degree intake temps soon as they climbed to around mid 40 I was only making like 310 so you might want to spend a little more money on an intercooler than i did to begin with.

Chris

 

does the power fc and commander also have a wideband on its own? or do i need a wideband plus its gauge?

i decided to go with a 12.5" x 12" x 3" intercooler kit , change every hose with silicone one , an HKS downpipe , it already has an exaust system ( what size should it be? 3 inch??) , and a power FC .....plus a second oil cooler....

wont push the stock injectors to more than 80% ....we ll see what i can get till there

i ll keep the stock radiator for now...and do the fan modification.....

any filter or intake suggestions?

 

people say the knock sensor on the pfc isnt reliable.. get a wideband instead (comes with a gauge)

 

cant the pfc be able to show af if i connect it to a wideband? ( i mean i could get just the wideband sensor , not the gauge too)