junito1

OK. i know some people somehow make upgrade injectors direct fit by using different o-rings or other little neat tricks.

I currently own direct fit 4x1000cc venum injectors from e-bay.

As i slowly realize this could be a big mistake, i think it would be wise to start to look for other options.

I currently have greddy 720secondaries.

I basicly looking for direct fit secondaries for 88TII.

SOmeone that has done some similar upgrades using stock fuel railss. LEt me know the secret!!

I dont want to buy fuel rails, fitings, nor braided lines...

I just want to slap the secondaries on. Im thinking or just doing 1600 seconds and just moving my 720's to the primaries. I Will have to do this if my e-bay venoms arent in perfect shape. <-- having them tested.

Which 1600cc injectors are "direct fit" for 88 TII.? WHere can i find them. ANd what do i have to do to make them direct fit?

ducktape

I have a pair of 1680cc injectors for sale. They're low-impedance, "pro-import" style injectors so they fit the TII just fine. If you're interested, let me know.

classicauto

iTrader: (3)

Why? What kind of power are you making that you want 1600 secondaries?

junito1

Stage 4 BNR on stock block. I want to have enough fuel for 15psi. Most likely use stock 550cc in primaries.

I just want to know which 1600, 1680 brand injectors are the direct fit replacement for 88TII injectors. I keep forgetting if 88's are low or high but i do know that 88's are different from full s4 and full s5

gxl90rx7

iTrader: (1)

I contacted RC engineering for my injectors.. i told them it was for an 88 TII, and they sent me what i wanted, dropped right in.. the only problem was on the primaries, the 750's were a little to wide to fit in the stock holes, a little bit of dremelling, an they fit perfect

http://www.rceng.com/prices.htm

the 750's were high impedence, no resistors needed. for your 1600's make sure not to use 10ohm resistors, they can cause hesitation problems.. try something from 4-6 ohms instead

Ottoman

While on the subject,

How big can u go before u need to use an Aftermarket AFPR?

on an S5 i guess that means u HAVE to use an aftermarket rail as well

junito1

yes good question. When will an adjustable FPR be needed? Will i need a FPR for my fuel setup?

Walbro255 , either 4x1000cc or greddy 2x 720cc + 2x 1600cc
EMS

fusion-turbo

I've heard that after you upgrade your pump you should get an upgraded FPR due to the increased flow and pressure.

Im getting 720 secondaries with a walbro 255lph pump and i was told to get an FPR...

NZConvertible

What exactly is a "pro-import" style injector?

WARNING!

The injectors on that page have their flow rates measures at 43psi, not the FC's stock 36psi. That means they can't be directly compared to the stock injectors. Flow increases to the square root of pressure, so at 43psi you'll get 9% more fuel through them. Conversely if you stick those "750cc/min" injectors into an FC with a stock FPR and pump you'll only get 685cc/min! Be very careful when sizing your injectors. Their flow depends entirely on pressure, so it's vital to know your fuel system's pressure.

You don't really need to. A significant pump upgrade (like a Walbro) will cause higher fuel pressure, so unless you have some way of tuning the fuelling, you'll run rich all the time and waste gas. If you do have fuel control, you can always just tune to suit the higher fuel pressure.

Ottoman

NZ,

can the stock one raise the fuel pressure adequately? say u boost 1 bar for example.. will the stocker crap out? or be able to make that kinda pressure

and isn't the base fuel pressure of aftermarket inj. usually higher?

NZConvertible

The FPR works like a wastegate in that if it's too small, pressure goes up, not down, because it can't bypass fuel fast enough. Too much fuel pressure is safe but inefficient, unless you can lean the mixtures electronically.

Yep, I just edited my post with a warning.

gxl90rx7

iTrader: (1)

ah thanks for the info.. it makes a lot of sense, because i did notice it running a little leaner than I anticipated.. but when i tuned for them i made sure i was too rich, and leaned back from that, so no motor poppage.. but now i know why it seems to be running so lean.. good info thanks

ducktape

That's Marren's designation for injectors with an 11mm upper o-ring, and 16mm lower o-ring, using a Japanese style injector clip. Fits TII.

junito1

so where can i get 1600cc "direct fit injectors"? for 88 TII

gear_grinder

iTrader: (4)

i just have kindof my own queston, i got a set of 720cc venoms online and they work great so far (750 miles on them), i have a stock core and i was wondering if that injector size would mess with starting because i have a stock engine management.

ducktape

Not interested in my 1680cc injectors? They'll fit and they're cheaper than you can get new.

junito1

^^ as of right now I own 4x1000cc venoms from ebay. Im working on having them flow tested. If they fail.. im going for the 1600cc or 1680's.

I just want to have my info straight. so if they do fail i can act quickly to get my project done.