550 primaries

1600sec

255 lph walbro x2, one to each rail

aremotive fpr, static 50psi(?)



Half bridge w/ a T70 1.15 anywhere from 15-25psi..



Should I upgrade my secondaries?

enough for 20psi i dunno about 25

at what fuel pressure?

35-40ish for fuel pressure with the 1680's....that works for me anyway.



I run 1680's x 4 now, but plan to go down to 1200 x 4.



You could get close to 25psi, but its all depends on your setup and the flow....A T70 is a big turbo... 25psi on a T70 would be blistering fast

https://www.nopistons.com/forums/pub...IR#>/devil.gif



Ok so for a while I will be set, maybe look into some bigger secondaries later on.. I won't be running that much until I can make the drivetrain bulletproof..

Why not go 850/1600?

It's a little bit easier to tune with 4 identical injectors. I used to run 4 1600's with a Supra pump and the stock FPR. I ran 18 PSI and had PLENTY of fuel left over. The 4 1200's that whiplash mentioned would help with the driveability, but like he said, they probably wouldn't be able to handle 25+ PSI too well with your planned setup. You can get the 1600's at a great price from Marren: http://www.injector.com .

Yup!! I got my 1680's from Marren...cheap as hell.



I haven't decided on the 4 x 1200's yet, and my only reason for doing it is for the lower load points and idle....My idle is almost spot on know...



13Bace: Do you run a Wolf EMS puter? I think we've chat'd before....

Most people get scared away from the 1600's because of the roughness at low loads and the constant flames, but like you said, it can be tamed. My idle was usually fairly steady around 800 RPM.



I used to have a Wolf 3D 3.1 with a T-78 in my convertible. Now I'm trying to decide on a setup for my 91 coupe. I'd like to try out the new Wolf 3D 4.0, but my friend wants to give me his old Haltech E6S for $200.

How hard is it to modify the fuel rails to run the 4 1600/1680's?



Would 4 1200's be enough for a T04S and a streetport?

My idle isn't that bad w/ 160 x 4's, but its the cold enrichment thats hardest dial in (via Wolf EMS)....Of course its getting colder out so that doesn't help.... 3.1's are still better than some stand alones I've played with, but 200.00 for Hal? shoot, bag that!



The 4.0's are super nice, however my PR connection says they have a new killer version coming sometime.... I'm all over that. Its a shame more people don't have Wolf's, cus there awesome stand alones....It was the CSR that F'n sucked here in the US.....

1200 x 4? ohhhh ya! You can run 20plus psi with most turbo's...



You don't have to get a different fuel rail for FC's anyway...All you need to do is buzz off the plastic on the top of the fuel rail and use a stock diameter O-ring...That plastic has no baring on the injectors sealing into the rail...

****! I ment buzz off the plastic on the top of the 1680 injector...sorry

Oh yeah, I think you mentioned that before...that's right.

It's pretty easy. You can just modify the injector to go right into the stock rails.

You can use more than one o-ring just to be safe. https://www.nopistons.com/forums/pub..._DIR#>/dry.png

Yeah, now I remember the cold enrichment problems...it's been a while. It took a long time to get that right. The Wolf worked really well or me. What is CSR? Do you mean the customer service?

I did get the cold enrichment worked out...Its starts on the first crank everytime, but its just really rich on the guage and the Wolf hand held, which isn't the best tool in the shead..... No complaints with the Wolf EMS's...I think there awesome for the cash....

WAY OFF TOPIC:



Whiplash, that is a BEAUTIFUL FC. MORE PICS!!!!!!! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

The problems with not starting cold could be due to a weak signal. An MSD 8509 could help give you a stronger signal, which would also ward off any signal errors. I used to have to jump my car on really cold mornings because the signal was too weak due to low battery voltage.

Run the 4x1680s at 42.5 psi or you will run out of pumps at about 22-23psi with the walbro's. I run 2x550 and 2x1680 2xwalbro at 62.5 psi static and have enough fuel pump to run about 23 psi. Lower fuel pressure and bigger injectors is the way to go because the pumps flow more at lower pressures. I tried the 4x1680 setup on my side ported FD and had problems because the power fc can't fire the inj at low enough duty for idle(fucked a motor because of fuel in oil contamination). With my secondary bridge I ran the 4x1680s and the idle and driveability was better than with the 850's. With 850's and 1680's with 42.5 psi static fuel pressure, I was hitting 92% at 20 psi on the bridge. These are all with a 67-1(flows very similarly to the T70 up until about 20psi).

Thxs guys.

Damn I think you read my mind 1revvin7. Thats almost the same damn turbo/motor setup I'm going with. https://www.nopistons.com/forums/pub...DIR#>/wink.png

Hey IGY didn't you guys experiment with wiring a 3rd set of injectors in parallel with the secondaries and running the whole damn thing with the PFC?



Did it work out? I would think that thats the way to go since you could run 850 primaries...for the smooth idle and 4x1600's for secondaries and tertiaries. That way when that T70 buries the boost gauge you have no worries about fuel.

9BASE3:



I can dig up some new photos... I need to post motor photos too. stay tuned.



thanks though! https://www.nopistons.com/forums/pub...IR#>/smile.png

Actually yes, Dragon ran a six injector setup w/ 2x1680 2x550 and 2x720. It worked very well for him. If I was running 2x6an fuel lines instead of the single 8an I would have his setup on my car right now. It actually blocks off the secondary holes and you run 4 injectors in between the upper and lower intake manifold. He was hitting something like 75% at 25psi with the T70.

Why move the secondaries from their original position? Do you have any pics of the setup?

simple. Because there's no point in running 3 fuel rails.

Agreed. Is there any reason not to keep the factory secondary position, add two more injectors plumbed into the primary runners between them and make a new rail?

Actually yes, Dragon ran a six injector setup w/ 2x1680 2x550 and 2x720. It worked very well for him. If I was running 2x6an fuel lines instead of the single 8an I would have his setup on my car right now. It actually blocks off the secondary holes and you run 4 injectors in between the upper and lower intake manifold. He was hitting something like 75% at 25psi with the T70. [/quote]

I like that idea, or maybe even just add a couple teritaries(sp?) injectors at the tb elbow? I forgot how many drivers my e6k will allow with already 4 high impediance injectors, but I could always add more inj drivers...

T70 with a big ass street port...pretty cool

T70 at 1.6 kilo's...even better

Hitting 75% duty cycle at 25 psi with 5900 cc of fuel....priceless

If I recall RallyMotorsports from Joisey had a 91 TII w/ T70 and I think they didn't end up using that because it was to big... something like that. They were in turbo-mag. years ago with that setup....Not to talk you out of it or anything..cuz you'll beat me https://www.nopistons.com/forums/pub...IR#>/smile.png

A pump on each rail, 1600 secondaries and 850 primaries with an SX regulator.

this setup has gone 9.10 in the quater at over 150mph in a 3rd gen, with 30+psi

running a haltech. What i am saying is i dont see why you guys are having to run so much injector in your street car. You can also use lines already on the car!

this setup has been used for over 2 years and still works great.

yeah I think it all depends on the person, and what they like. I've seen the same thing.

What kind of afr's is it running? What kind of fuel? Timing? Nitrous? What static fuel pressure? Turbo? Fuel pumps?



Yes, it can be done, I just want to hear details. I am specifically interested in the fuel pumps.



I think alot of people out there are running single supra/cosmo/walbro/etc. fuel pumps with there xxx/1680 setups and are having to compensate in the higher rpm's by adding duty cycle to make up for a weak pump. Take a look at your fuel map, if duty flattens out after peak torque then your pumps are probably not falling off. I ran a single walbro with my 850/1680 combo. At 6500 rpm I was hitting around 70% duty, but by 9000 rpm I was at 97%. Now I run 2x walbro pumps with a 550/1680 setup with slightly higher fuel pressure. At 6500 rpm I am hitting around the same 70% duty, but at 9000 rpm I am only hitting around 75% duty.

I ran appx 3 kilos static fuel pressure and with 550cc/1680cc at 6000 rpms, my injector duty cycle was around 65-70%~ But at 9k, I was hitting close to 90% https://www.nopistons.com/forums/pub...IR#>/blink.png so I turned the fuel pressure up and found that at 4.5 kilos fuel pressure, my pumps would lose fuel pressure(2 X stock FD pumps).



Guess I'm going 2 x walboro then.

Well I'm going with a half bridge, I was informed that this turbo would work perfect. I've heard of 1.15 p trim T66's choking in the higher rpms on a half bridge, I don't want any choke, just lots of power https://www.nopistons.com/forums/pub...#>/biggrin.png



Couldn't let you have the fastest fc around here for long https://www.nopistons.com/forums/pub...IR#>/smile.png Your car already looks damn fast, I can't image what this setup will be like https://www.nopistons.com/forums/pub...IR#>/wacko.png

Choking in the higher rpm's is usually caused by to small of an exhaust side. The T66 flows plenty of air for a half bridge. The 1.15 P trim exhaust side worked fine on my car reving past 10,500 rpm's. I guarantee almost any half bridge out there makes peak power before that point. Even if there was a problem, the fix for falling off on the top end is to go up a exhaust housing size (1.32), not up on the compressor side. In fact the bigger compressor side may cause more falling off on the top end because you should be flowing more air because you are making more power.

Choking in the higher rpm's is usually caused by to small of an exhaust side. The T66 flows plenty of air for a half bridge. The 1.15 P trim exhaust side worked fine on my car reving past 10,500 rpm's. I guarantee almost any half bridge out there makes peak power before that point. Even if there was a problem, the fix for falling off on the top end is to go up a exhaust housing size (1.32), not up on the compressor side. In fact the bigger compressor side may cause more falling off on the top end because you should be flowing more air because you are making more power. [/quote]

Yes I orginally want a T66 w/ a 1.15p trim hotside and was told a much larger turbo/hotside was needed for it....Makes me reconsider... I know a T70 IS friggin HUGE...