top end power loss sr20det

SON240sx Automotive
1

I have an sr20det and i just swapped out my stock 370cc fuel injectors for new 550cc injectors. Now when i drive, i feel the boost, but at top end around 4-5000 rpm it loses all boost and wants to quit on me…anyone know why…
if its overfueling what should i do?

thanks

2

you are most likely running right as hell.
Get a fuel management system in order to back off on the fuel. Your ECU still think you have the 370cc installed and pumping about 27% of additinal fuel at any given RPM . More under boost.

I am surprise your car is even running… WoW

3

This is a great thread.

I like the cut of your jib, matt_sr20det.

4

so is there any fuel management besides the stock pressure regulator ??
farmer

5

u need wider rims, that is ur problem.
did u do any research before this or putn bigger injectors in with no managment at all, seemed like a great idea

6

^^^

LOL

You are dumping 33% more fuel in there than your computer “sees”.

car must feel slower than it did before

7

… what the fuck

8

lol @ this thread. IBTL.

9

so what should i do next to fix this?..

10

back off fuel… SAFC-II or AEM, Greddy E-mange… anything that allows u to controller fuel

11

or put the stock injectors back in since having 550’s on your car isn’t going to help anything at all…

12

my injectors were bad and was was non-functional so i got the 550’s from someone…
what would be the best fuel management system to run on the sr set-up?

13

Best? You have a few choices: AEM EMS, Power FC, Haltech, Motec, just to name a few etc. Prepare to spend $1000-$1500 + tuning

Or, if you just want to get the 550 working, get an SAFC - ~$200 and a few hours and you’re set.

14

Nice, I didn’t know a car will run if you just put 550s on it with no tuning. Your car should pull a lot harder now.

15

crank up the boost on the turbine to 16 psi and you’ll be mint.

16

u cant just drop in those injectors and go , im in the same boat i have a set of 555 sitting on my desk but the ecu has to be redone i looking into the nistune option! 400 from australia then someone to tune it so still well under a grand! the other thing is upping yourmaf sensor , more fuel + more air. dont
waste money on the safc II

17

This thread is incredible… they all sound like great ideas at 1.25/L.

18

performance isnt cheap on gas, you should know that if u have a 12.7 time posted, betcha that doesnt get 35mpg

19

The 12.7 is on a T25 @ 14psi :rofl:

Don’t temp Dustin.

20

rofl yea like gonad said, I’d be careful who you call out there :wink: