I have an 86 n/a i was going to sell due to a baby on the way, no one wanted it so i decided to turbo it till I rejoin the army and ship out, at witch time ill have the motor rebuild and street ported.

my set-up will hopefully be-

T4 turbo- Ordered
HKS T4 manifold - Ordered
55mm Wastegate - Ordered (only bad thing is the manifold dont have a WG flange)
Blitz BOV - Ordered
FMIC - Ordered
FMIC piping - ordered (black/red)
255 LPH FP - ordered
4 720 cc venom injectors - ordered and recived pic below.
S-AFC - ordered
2 1/16 tinted boost guage

Think 4 720cc are to much?

 

um...


wheres the stand alone?

 

well, whats your hp goal? and whats the specs on the turbo? actually, 720 secondaries might be too small

 

looks like you did a bunch of ordering before theroughly searching on what you want to do. Why get a manifold with no wg flange? does the wg even have a piece of pipe comming off of it to weld a flange on to? Why get an safc if that can't control timing or any of the fine points of tuning? The safc is good for near stock configurations but a full turbo upgrade + safc = boom. At the very very least I would have gotten an rtek 2.0 chip witch would have elimonated the need for an safc as well as it controls timing. Also the rtek chip will controll the 720 pimaries durring cranking witch the stock ecu without the chip will not do and in many cases lead to lots of flooding issues durring cranking. What t4 turbo did you get? Depending on the size of that thing you may need bigger injectors as 4x720's doesn't really support that much hp. I wish you the best of luck with your setup but really if your going full turbo upgrade than half *** is not the way to go as it's only begging for problems.

 

Im not plaing on getting a HUGE amount of boost, 5-7psi is max. The stock ecu ill be ok with that amount. this is more just a "get ready" for the port and stuff then witch ill add a stand alone.

 

hm.... so why would you run that turbo if its going to be way out of its efficiency range? you coulda just gotten the stock turbo and gotten a bnr stage 1 done to it and that would have been the OPTEMUM choice for you. btw, i hpe you dont plan on gettiung super stickey tires cus your driveline is going to go to crap if you beat on it.

im not saying i know much, i dont knowshit. the difference is, i ask ALLOT of questions, and i reaserch. hell i spent 1.5 years reaserching before i even started doing my turbo build.

the very first thing i got was a complete t2 drievline.
then the components, then the engine. i made a hp goal i wanted, and i created my list of components around the build. not the way your doing it.

 

I've had my turbo for over 3 years and I'm still trying to figure out the right injector/turbo combination.

I'm going to search for some good info. I'll post it up here if I find anything good.

 

What size T4 turbo?

 

http://rx7.com/cgi-local/2ndgencalc.cgi

I have a lot of research to do.

 

what do you mean out of its efficiency range? i don't know of any turbos that fit the FC that are out of their efficiency range at 5-7PSI of boost. efficiency is rated at peak not lower than peak boost levels. you can toss on a 70 trim and gain more power at lower boost levels at the loss of spool time. turbo size is just relevant to your power goals at a certain boost level, for higher numbers you need a bigger turbo which will produce more power at lower boost but spool time will suffer due to larger compressor wheels. sure some turbos are really designed for higher boost levels but everyone eventually turns up the boost sooner or later.

unless this is some super high trim turbo i doubt pushing 5-7psi will be of any issue, less boost= more reliable anyways.

 

any turbo can fit any car.


in my opinion, i say if he has a na block, he should use a stock turbo with a bnr stage.

my opinion and i dont wanna hear what anyone else has to say.

 

so far, in what I've read, the concensus tends to be:

680cc injectors for primaries (to avoid flooding/starting issues)
720-1600cc inj. for the secondaries ( depending on which t04 you have ( apparently there is a huge HP range between the t04s)
a larger pump ( some claim walboro is not reliable and some claim Supra pumps are the way to go)
a FPR is a must unless you have a standalone.


Reted claims 400rwhp would require minimum1000cc primaries/1600 secondaries in order for him to feel safe. I think his opinion is one to be taken seriously. I'll have to pick his brain sometime.

I want to know how you and your car end up though. keep us posted.

 

1000p/1600s is a bit of overkill, iirc Carl Byck was running 720p/1600s with a A1000 fuel pump and made 540? RWHP and still had room to grow but upgraded to larger primaries to bridge the larger gap between primary and secondary staging.

 

hey Karack,

if I wanted a nice 350rwhp ( high boost= 15psi unless I get the HIGH boost option) on a BNR Stage 3.

I know I'll need a bigger fuel pump:
Walboro was my #1 choice but the Supra pump seems to outperform the walboro (~280lph)

I think the 1st gen had 680cc inj. ( but I can't remember whether it's high or low imp. ) and I think that would still keep me from having starting issues. I am still trying to figure out the low/high impedance issue (searching as we speak)

how big can I go in the secondaries WITH a piggy-back(S-AFC) and still be in the 320-350rwhp?


sorry to thread jack but we might as well make it useful until you install your parts.

 

wow so much hate here. Im NOT trying to make a hyge amout of HP nore am i going to run a HUGE amount of boost, listen when i say again im just getting the **** installed so when i deploy i can have it rebuilt and ported. that way the person doing the work can tune it with the turbo on. nothing more.


T4 turbo .60 .85


also i had ordered the HKS mani befor the turbo, I didnt know the seller included a wastegate with the turbo........but if i cant get a shop to weld in a flange im sure i can trade it for one, so its not that big a deal.

 

and btw there is nothing writen in stone that ill use the t4, thats just what i have coming. if i decide to go another route i can trade the t4 for a stock turbo.

 

I don't see any "hate" in this thread...Just a bunch of people making strange suggestions...

Anyway to answer the question, 4 x 720CC is likely enough fuel, but you are going to have a hard time making the stock ECU run well with 720CC primaries. The S-AFC will help once the engine is running but the AFM is ignore when starting the car so you may find you have flooding issues. That's a lot of injector compared to the stock NA 460CCs.

 

yeah, thats why i asked if it was to much. should i trade 2 for a pair off a t2?

 

those injectors suck.......

 

There's no real issue running 550CC primaries with the stock ECU and an S-AFC. In which case you will want to use larger secondaries.

Really you are in standalone territory since you are not using the stock turbo.

 

You or someone you know run into problems with those? If so, what kind of problem.

 

yes i would like to know also because i am trying to trade this guy for some stockers i have

 

I run venom 720's for secondaries and I havent had a problem with them, even sent em with my primaries to get cleaned to whichhunters and they said they looked good and there wasnt a problem.... Y do you say they suck?

 

I heard Venom injectors, when tested, have a lower flow rate than advertised.

Anyone confirm this?

 

found this:

http://www.fuelparts.com/High_Performance_injectors.htm