Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost?
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2000
Posts: 336
Likes: 0
Received 0 Likes
on
0 Posts
Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost?
I pieced together a custom turbo kit. I'll be running a T3 turbo boosting 5psi most of the time on my b16a. i might up it to 7psi occasionally. Anyway, for fuel, I got a Bosch Inline Fuel Pump and a Vortech FMU 12:1 and a B&M FPR (STOCK injectors). I was told the 12:1 maybe too much fuel for such a low boost application. i would be throwing an extra 60lbs of fuel at only 5psi...
so... what disk would be optimal for my setup? i was thinking 8:1. anyone wanna help me out? i found a 8:1 recalibration disc for only $20. Thanks!!
so... what disk would be optimal for my setup? i was thinking 8:1. anyone wanna help me out? i found a 8:1 recalibration disc for only $20. Thanks!!
#2
Honda-Tech Member
Join Date: Oct 2000
Location: San Diego, CA, USA
Posts: 1,584
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (Tr0LL)
8:1 will be to low, that's what I'm running with 310 cc injectors. try a 10:1.
#3
Honda-Tech Member
Thread Starter
Join Date: Feb 2000
Posts: 336
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (TurboInteg95)
hmm... 8 x 5 = 40 psi over stock... 10 x 5 = 50 psi over stock... 40's not enuff? anyone else... how much are you boosting anyway? remember, this is low boost application... drag includes the 12:1 with their setup, but tha'ts boosting at 7psi rite?
#4
Honda-Tech Member
Join Date: Jan 2000
Location: Sacramento, CA
Posts: 14,500
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (Tr0LL)
the idea behind the FMU is that it raises FP in proportion to boost. aka, you get enough fuel at ALL times. If drag uses a 12:1, then it does not matter what boost level you are at (theoretically), it supplies the right amount of fuel. 12:1 is safe/a bit rich, 10:1 is probably closer to what the motor wants.... but you run the risk of leaning out.
8:1 and 310cc injectors =
8:1 and 310cc injectors =
#5
Honda-Tech Member
Thread Starter
Join Date: Feb 2000
Posts: 336
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (dustin)
yes. i know that about the growing fuel rate. i'm just saying... ususally ppl dont' blow they're motors at 1 or 2 lbs of boost... even then the fmu is only adding like 10lbs or fuel or so... but at 5 psi... which is what i'm gonna be boosting, that's where i'll be running most of the time when racing... so that's why i used those math numbers (ie 8x5=40)
anyway..... so u also agree 8:1 and stock injectors would be too little fuel?
anyway..... so u also agree 8:1 and stock injectors would be too little fuel?
#6
New User
Join Date: Dec 2000
Location: Skunk2, rulez
Posts: 1,942
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (Tr0LL)
8:1 is too little yes. unless you have bigger injectors which you don't you shouldn't use it troll..
#7
Honda-Tech Member
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (Tr0LL)
I too was told to go with an 8:1 ration on my FMU. I'm currently usuing an H22A fuel pump and stock injectors on my 98 Civic EX, and I keep running really lean past 5.5psi. I'm adding a 255lph BBK fuel pump and I was told that lowering my FMU ratio would make it easier to supply the needed fuel without overburdening the system. I would likw to know however where to find th enew discs needed to change the ratio for my Vortech FMU, so if anybody knows a good place to find them, please let me know, thanks.
Trending Topics
#8
New User
Join Date: Sep 2001
Location: Bradenton, FL, US of A
Posts: 797
Likes: 0
Received 0 Likes
on
0 Posts
Where to get recal kits.
You can get the re-cal kits from Summit Racing for about $29 a setting.
They carry all vortech steps but the website only says 6:1.
Randy
They carry all vortech steps but the website only says 6:1.
Randy
#9
Honda-Tech Member
Join Date: Oct 2000
Location: San Diego, CA, USA
Posts: 1,584
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (VTC_CiViC)
your problem is your fuel pump. You need a high pressure pump like a Bosch. those intank ones cant cut it.
#10
New User
Join Date: Dec 2000
Location: RAIDER NATION, CA, USA
Posts: 6,415
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (TurboInteg95)
so basically... rc310s and a 8:1 fmu is better than using the stock injectors and 12:1 fmu?
[Modified by dlplayboy, 1:21 AM 9/14/2001]
[Modified by dlplayboy, 1:21 AM 9/14/2001]
#11
Honda-Tech Member
Join Date: Jan 2000
Location: Sacramento, CA
Posts: 14,500
Likes: 0
Received 0 Likes
on
0 Posts
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (dlplayboy)
so basically... rc310s and a 12:1 fmu is better than using the stock injectors and 12:1 fmu?
#13
Re: Vortech FMU 12:1 - TOO Much fuel?? for Stock Injectors and 5-7psi boost? (dustin)
so basically... rc310s and a 12:1 fmu is better than using the stock injectors and 12:1 fmu?
The car will run mad rich like that.
The car will run mad rich like that.
-Chris
Thread
Thread Starter
Forum
Replies
Last Post
Teluan
Forced Induction
1
09-08-2001 10:09 AM