Engine Management eCtune , Crome , AFC , FMU , Zdyne , Hondata , EMS , TE , Uberdata Anything to control your fuel, spark needs!

injector/fuel pump question

Old 03-11-2010, 05:35 PM
  #1  
0.0 BAR
Thread Starter
 
Join Date: Sep 2009
Posts: 4
Default injector/fuel pump question

I'm in the process of boosting my 2000 eclipse gs. I have a TD05h 14b off a 1990 talon. My question is if i'm only going to be at 7-9psi could i get away with my stock injectors and fuel pump? I've searched and found a lot of useful info but i can't find anything to do with a similar question. My car has the 4g64 2.4L engine and it's got the 275cc injectors. Let me know what you guys know.

Thanks.
eclipse2000 is offline  
Old 03-13-2010, 12:43 AM
  #2  
1.0 BAR
 
hard2obtain's Avatar
 
Join Date: Jan 2006
Posts: 526
Default

I donīt know so much about eclipses but i believe you can stay with that pump but you are going to need at least a FMU to increase the amount of fuel when hits boost
hard2obtain is offline  
Old 03-13-2010, 01:26 AM
  #3  
0.0 BAR
 
Join Date: Mar 2010
Location: Sydney Australia
Posts: 22
Default

New here and first post.
You will need to look carefully at the fuel supply system a basic rule of thumb and common sense when you think about it,if a Fuel Injected engine sees an increase because of an addition of a Turbo or an increase of boost pressure over stock Turbo boost all must remain equal.
Therefore add 8 psi boost you increase fuel pressure 8 psi,then you have to take into account how this affects fuel flow.
Therefore do you require a higher volume fuel pump possibly larger fuel lines adjustable pressure regulator etc.
Quite simple really when you think about it.

Current projects Polaris RZR Buggy's Yamaha raptor 700 quad's Nissan GTR engined Holden VL Commodore
coxy is offline  
Old 03-13-2010, 01:49 AM
  #4  
0.0 BAR
Thread Starter
 
Join Date: Sep 2009
Posts: 4
Default

Originally Posted by hard2obtain View Post
I donīt know so much about eclipses but i believe you can stay with that pump but you are going to need at least a FMU to increase the amount of fuel when hits boost
Thank you. Thats kind of the answer i was looking for. What about the injectors. Do you think they will be able to handle the extra fuel? It's not a lot of boost. Either way, if i get a new pump and injectors or if i'm able to use the ones i have, i will still have to run some sort of FMU. Just need to find out if its possible with the ones i have. Otherwise i have to mess around with wiring in new injector wires, possibly a resistor box of some sort as well.
eclipse2000 is offline  
Old 03-13-2010, 05:02 AM
  #5  
1.5 BAR
 
Join Date: Oct 2009
Location: CHICAGO
Posts: 934
Default

275cc injectors are good for ~170 max hp. depending on what you are doing as far as tuning will determine what needs to be done. considereing the engine puts out ~150hp stock there doesnt appear to be any wiggle room on the stock injectors. rule of thumb with boost is the vehicle will make 10hp for every 1psi of boost. you want to run 9 psi so you can assume the engine will produce 90hp more than stock. that puts your hp value up to ~250hp.
if you install a 1:1 fuel pressure regulator(1psi fuel pressure rise for every 1psi of boost) at 9 psi boost your stock 275cc injectors will only be flowing 300cc. know where near enough for 250hp
if you use a shitty fmu your stock pump will not survive and you dont want to pressurize your fuel system that high.

my recommendations:
1:1 boost reference fuel pressure regulator(this replaces the stock fuel pressure regulator)
550-600cc injectors
walbro 255 intank pump
its not mentioned but an intercooler is a must
custom tune.
busa4 is offline  
Old 03-13-2010, 09:45 AM
  #6  
0.0 BAR
Thread Starter
 
Join Date: Sep 2009
Posts: 4
Default

awesome information! i really appreciate it. that pretty much covers everything i needed to know. except the size of the injectors? i have a set of 440's that came off the car that the turbo did. they are in perfect shape and i have a feeling 550cc - 600cc is not necessary for only 7-9psi. the 255 pump with the pressure reg is the way to go though. I do have an intercooler but it's only a side mount. i have to do some research on exactly how effective they are. FMIC's are $$$$$$$$ haha.
eclipse2000 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
juli0_bustamante
Hybrid/Tech
10
03-30-2008 11:50 AM
RandysSOHC
Engine Management
10
07-02-2007 04:54 PM
ncspack7civic
Forced Induction
3
01-02-2006 01:26 PM
robs99si
Forced Induction
13
09-02-2004 02:48 PM
Platty9
Forced Induction
2
06-04-2003 07:31 PM


Thread Tools
Search this Thread
Quick Reply: injector/fuel pump question


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.