ok im putting a new rebuild engine with a near monsterous port in my 88 TII im also hopfully going to ugrade my turbo i no i need to put larger injectors in does any one any suggestions for what i should do to my computer

if youve got a big port and turbo, then you can pretty much just put larger injectors in there and keep the stock ecu.

it would run fine on stock ecu and just larger injectors? i thought youd need at least basic fuel management.



running 550/720cc setup with possibly a hybrid for now. (it's a project car im helping out on)



kevin.

thats exactly wut i am going to run im my setup i have been looking at the stage 2 rtek7 ecu upgrades and have decided to use it as my computer being that it runs off a palm pilot and is damn near a stand alone unit with out all the money and extra bulshit to come along next is finding a place that will turn my t3 turbo in to a hybrid t3/t4 if any one knows some where in northern Jersey or any where near by let me no



any helpful suggestions are welcomed



james

theres a shop car locally thats running 680/720's on a stock ecu with a greddy turbo kit, its rich cruising, but it handles the power fine

t3/t4.... Smaller than stock?

no t3 is stock and a hybrid t3/t4 is a t3 inlet and a t4 outlet witch is a bigger turbo very good for lower rpms and higher rpms still need to find a place to make me a turbo any sugestions let me know

stock turbine is actually larger than a t3.

even on a large street ported motor? thats the only thing im unsure about. cause i was figuring around 10psi with an s5 turbo (currently he has an s4 turbo) and the block we have is an s4 t2 block thats a large street port. i was thinking 550/720 injectors. the manifolds are port-matched too.







so you think it would work fine on stock ecu? probably just have some missing power until going to an upgraded ecu huh?







kevin.

his old motor was stock port, with a greddy turbo kit, and ic. 680/720's on the stock ecu.



with a ported engine you might want an safc or somthing, just to round it out?

yea i think he wants to go with the pda & rtek thingo. should be interesting to fool with some new stuff https://www.nopistons.com/forums/pub...IR#>/smile.png.







i just never knew you could run a stock ecu on anything over basic bolt-ons. learn something new all the time https://www.nopistons.com/forums/pub...IR#>/smile.png







kevin.

well you can, but doing so you'll find out why nobody does. basically the s4 stuff is tuneable, but its limited. like timing, you can turn the cas, which means somewhere the timing is gonna be wrong. or you can play with the afm spring tension (MARK WHERE YOU START!!). also you can put larger injectors in, the gsl-se's do this the worst, but i notice it on the t2 as well, once you have the big exhaust and the intake on there, the car is too lean at cruise, and then up top, 20% more power takes 20% more fuel right? so if you go from 180 to 220hp (20%) then running 660cc injectors (also 20% more) all the way around gets you (in theory) the same mixtures as factory. in reality the car is rich stock, and can do 220 on the factory fuel system, but you see where i'm going right?



add an f-con and maybe a gcc to fine tune to this, and you can actually make some decent safe power. the last engine in my t2 ran 550/680's and drove fine, under part throttle sometimes you'd feel the secondaries turn on, but most of the time you'd never know



just use your head and err on the side of caution

i dont know if i'd feel safe with no managment sytem

well i'm kinda recomending an fcon at least (i'm running an fcon on a stock na ca...)



but yeah this is meant for more mild setups (stock turbine, 12psi or less), and if you're not confortable doing it dont. standalone should get you slightly more power, with much much better driveability

For a piggyback greddy e-manage blue is probably the best bang for the buck.You can tune it with laptop and you can control ignition(to a point) and it also cames with an additional injector map to run 2 add-on injectors.You can pick one up for roughly the same price as an apexi SAFC.HKS fcon is useless 15+year old technology,and only worth considering if you acquire one for next to nothing.

yeah fcon is old school but it does have its pluses



1. they are cheap used

2. they go between the ecu and the injector, and not between the afm/maf and the ecu, so it only changes fuel, all the others change timing too, as the timing is computed from the afm signal.

3. the fcon is a faster processor, so the car actually does run a little better.



not saying its a cure all, or even the best solution, but on a stock ecu car, i like em