central_driver

I have a d16y8 1997 ex with a t3/t4 50trim turbo, 2.5 downpipe, fully built block 8.5.1 compression, eagle rods, acl race bearings, with a stock head

just ordered some precision 440cc injectors with the obd2 to obd1 clips with a basemap of my setup from phearable at 8psi.

I still need to order my wastegate which i wanna boost around 15-18psi and im told these injectors get 77hp each cylinder so thats what 308hp. now is that whp? And will i be able to boost that much. im pretty sure that 16psi would get me around 260-270whp?

i just read something but lost the link about some guy boosting 13psi on the same injectors and hes at 90% cycle. doesnt seem right to me. anyone help answer my question

Ass$nyper

There are many ways to size injectors did you do any of them?

central_driver

size injectors?

Chipped B6

for a t3/t4 minimum i would go for in terms of size is 450cc.

:D

Ass$nyper

size injectors as in do the math to see how much fuel you'll need.

Oh screw it just slap on a 750 holly down draft.

central_driver

im just going by what evans-tuning website said in 440's get 308hp and my goal is to get around 270-300

Ass$nyper

Do you trust him??

Are you willing to crank some math out?

central_driver

if i knew how to do the calculations i would but i have no idea how. i already ordered the injectors but i havent got the wastegate yet so im asking from people with experience what a y8 motor 8.5.1 compression, what can i do with 440cc injectors saturated. what kind of power can i get from them because if i buy a 16psi wastegate and than cant boost that high do to the injectors maxing out than ill be screwed.

central_driver

that would be dsm's with a resistor box and i got ones that dont need a resistor box. id be happy with around 270whp and i no my car on 8psi stock compression will make 210-220 so im guessing 10psi on 8.5.1 compression will be about the same whp (210-220) to stock compression. so each level of boost i go up is around 6-8whp(ish) so i have read on here in posts. 16psi would be 265-275. im not trying to max out my injectors so thats why when i read 440cc make 77hp per cylinder, x 4 =308hp. so 270whp would mean the injectors would be around 90% duty cycle.

central_driver

bump anybody.


This is the information i have.


The following is guide for selecting fuel injectors corresponding to horsepower and stock fuel pressure (40psi at the fuel rail). The sizes were estimated using 90% duty cycle of the injector. The sizing of the injector is heavily dependant upon the air/fuel level the engine is tuned at (ex. 12:1 air/fuel will take more cc's than 12.5:1 air/fuel) :

310cc 200~220whp
370cc 220~280whp
440cc 280~330whp
550cc 330whp~380whp
660cc 380whp~425whp
720cc 425whp~475whp
880cc 475whp~525whp
980cc 525whp~600whp

central_driver

bump