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

FMU question

Old 02-16-2004, 06:01 PM
  #1  
0.5 BAR
Thread Starter
 
Join Date: May 2003
Posts: 53
Default FMU question

I'm planning on getting a vortech fmu for my 90 turbo civic si. I have 340cc injectors, an adjustable fuel pressure regulator and boosting 9psi. I'm confused on which one I need 12:1 or 10:1 or 8:1. I have a stock fuel pump. I'm not exactly sure I know what those numbers stand for. Just need a little help from you guys. Thanks for any and all replies.
90TurboSi is offline  
Old 02-17-2004, 02:20 AM
  #2  
0.5 BAR
 
Join Date: May 2003
Posts: 127
Default Re:FMU question

Since you have 340cc injectors.. 4:1 or 6:1 would be OK.
Numbers represent how many PSI does it need to increase fuel pressure regarding to each 1PSI of air pressure.
For example with 6:1 ratio:
1PSI boost = (stock fuel pressure)+6PSI (from FMU)
2PSI boost = (stock fuel pressure)+12PSI (from FMU)
and so on...

Just bear in mind that stock fuel pump is *not* good for higher fuel pressures...
Nick7 is offline  
Old 02-18-2004, 07:10 PM
  #3  
3.0 BAR
 
Join Date: Apr 2003
Posts: 2,260
Default Re:FMU question

OK.

Read the Engine Management FAQ at the beginning of this forum.

If you still want to use an FMU after reading that, well, you're on your own.

FMUs are not for "high boost setups". Take the time to do your setup right, and it will provide you with the well earned power. Half *** it, and well, you'll see..
TurboEF9 is offline  
Old 02-18-2004, 07:15 PM
  #4  
3.0 BAR
 
Join Date: Mar 2003
Posts: 21,494
Default Re:FMU question

You're running 9spi with NO FUEL MANAGEMENT Post pics of the fried ringlands.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
Dr.Boost is offline  
Old 02-18-2004, 07:38 PM
  #5  
0.5 BAR
Thread Starter
 
Join Date: May 2003
Posts: 53
Default Re:FMU question

Originally Posted by Dr.Boost
You're running 9spi with NO FUEL MANAGEMENT Post pics of the fried ringlands.
I've rebuilt the motor with hypereutectic pistons and rings, blockgard, arp rod bolts, triple layer metal head gasket. I adjusted the fpr so the car runs really rich. It's only been 1500 miles on the new motor, so the car doesn't see much boost.
90TurboSi is offline  
Old 02-18-2004, 08:15 PM
  #6  
3.0 BAR
 
Join Date: Mar 2003
Posts: 21,494
Default Re:FMU question

It shouldn't be seeing any boost. I bet it idles real nice.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
Dr.Boost is offline  
Old 02-18-2004, 08:40 PM
  #7  
3.0 BAR
 
Join Date: Apr 2003
Posts: 2,260
Default Re:FMU question

If you really did do all of that to your motor.. why the hell are you half assing your Engine Management.

It's ENGINE MANAGEMENT. It controls your engine, you know, the thing you spent all the money on. Wouldn't you want to protect it? Wouldn't you want to get the most out of your money?

Please, read the FAQ. Change your EM solution.
TurboEF9 is offline  
Old 02-18-2004, 09:15 PM
  #8  
0.5 BAR
Thread Starter
 
Join Date: May 2003
Posts: 53
Default Re:FMU question

Originally Posted by TurboEF9
If you really did do all of that to your motor.. why the hell are you half assing your Engine Management.

It's ENGINE MANAGEMENT. It controls your engine, you know, the thing you spent all the money on. Wouldn't you want to protect it? Wouldn't you want to get the most out of your money?

Please, read the FAQ. Change your EM solution.
I'm half assing my EM because I don't need it at this point. I don't wrap the car out at all. I've read the FAQ. I've also talked to people that swear by fmu's for higher boost. That's why I'm asking questions. Either way it cost me nothing to build this car because I did all the work myself and and bought everything at wholesale. I wouldn't be that upset if it blows. I've put my money into my turbo Z28 http://www.4redlinemotorsports.com/ls1turbopage.htm
90TurboSi is offline  
Old 02-18-2004, 09:24 PM
  #9  
3.0 BAR
 
Join Date: Mar 2003
Posts: 21,494
Default Re:FMU question

Originally Posted by 90TurboSi
I've also talked to people that swear by fmu's for higher boost.
Stop talking to those people.


That Z looks nice. It's yours?
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
Dr.Boost is offline  
Old 02-18-2004, 11:41 PM
  #10  
0.5 BAR
Thread Starter
 
Join Date: May 2003
Posts: 53
Default Re:FMU question

Originally Posted by Dr.Boost
Originally Posted by 90TurboSi
I've also talked to people that swear by fmu's for higher boost.
Stop talking to those people.


That Z looks nice. It's yours?
I'll see what my AFR's look like with a fmu and 9psi. I'll run rich at idle if I have to in order to run 12:1 at boost. Yeah, she's mine. My pride and joy. Completely custom job. She doesn't see much boost either, until racing season starts anyway. One thing I like about imports is their gas mileage. I have to run race gas in the Z so it gets a little expensive to drive.
90TurboSi is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sinner
Engine Management
20
09-23-2009 03:29 PM
^SARK^
Engine Management
5
07-24-2005 11:25 PM
digital sol
Turbo Parts For Sale
2
02-28-2004 07:34 PM
Nick7
Engine Management
7
11-06-2003 04:52 PM
TAL
Engine Management
8
05-28-2003 06:38 PM


Thread Tools
Search this Thread
Quick Reply: FMU 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.