Whats the Rule of thumb for this type of regulator? If boost is around 5 to 7lbs whats a good ratio? AND ARE THEY RELIABLE?

My friend just gave me one and i dont know what the specs on the unit is. Im sure it came with his drag kit. It has a deep purple color...ill post some pix soon.




[Modified by Cramerox, 6:45 PM 4/1/2002]

 

ttt

 

stick with 12:1 with stock injectors...

but persoanlly, I wouldn;t trust a used FMU, I don;t trust an FMU period, let alone a used one..

think about it, when you boost, you need fuel or otherwise kaboom....don;t trust your engine in a used FMU just becasue you want to save 50-75 bucks...

new FMU is only $ 125ish

just like brakes, you only have a pair to stop your car...

 

Depends on injector size, boost level, and fuel control.

Based on stock ECU and bolt on boost levels ~7 psi, this is kinda what I've picked up on...correct away 'cause I know someone will find this incorrect.

Stock injectors 12:1

370cc/min 8:1

440cc/min 4:1

 

hey flaminco-t, im glad u replied. Im having a hard time finding the best Fuel set up for my car. I hope u can help. Im planning ot boost around 5 to 7lbs. You got any recomendation for a fuel setup thats economical? I would like to get a Hondata system but right now its not possible and maybe to much for what i need. thanks for any input.

 

keep your boost to 7-8 at a max get 12:1 fmu and an inline pump...that's it..
get an EGT to watch for triouble

 

also, don't boost more than 5-7 seconds....it's kind ahard to anyway..
but try not to boost too bad on fifth or with load ( uphill and etc)

boost and AC don;t mix...

 

Ok last part of my question. what is the difference or pro and con of having and inline fuelpump compared to a intank highflow pump?
will i also need a bolt-on FPRor will the 12:1 fmu be enough?

thanks stan....this is helping alot.

 

with FMU, you'll need the extra puch because let's say at 8 psi, you'll be pushing
stock FP ~50psi plus (8psi x 12 )..that's 146 psi of fuel pressure you'll be pushing, I believe the stock intank fuel pump can only do around 90psi (someone correct me if I am wrong) and walbro is only around 125ish PSI..

so you need the extra inline pump to push more fuel pressure...you can get away with stock intank pump, but you'll need an inline to push more fuel pressure

no, you won;t need the FPR, FMU basically does it for you for now

 

while we are on topic, i am new to all this crap. I need to get educated on this stuff. I'm running the GReddy kit and it comes with 310 (i think) injectors, I have no clue what the blue box it came with is doing for me. and im boosting 5 pounds daily, and ive been thinking about 7-8 at the track. so what do i need to get for a fuel setup?


[Modified by Aeka GSR, 4:37 AM 4/2/2002]

 

hmm, dunno too much about greddy blue box...
sorry..

I hate electronics..heheh JK

 

I wouldn't take the stock pump past 80psi because after that it seems to drop off to much in volume.So with 38psi for a baseline i wouldn't boost more then 4psi (with a 10:1 fmu).I tried to boost to 5psi with a stock pump but it didn't work to good.So i swaped a in-tank pump in and it works great.

 

Ok I got it!!!! Have you guys heard of people running both intank and inline pumps or is that just to much presure for low boost aplications?

 

just get an inline... it works well for that setup (12:1 fmu and stock injectors). i only recommend an upgraded intank when using Hondata or the AFC hack.

 

Here is my experience.

If you stick with the stock pump, it is only good to 65 psi then it dies hard.

If you upgrade the pump and use stock injectors, go with 12:1 if you want to be super safe, but 10:1 works just fine.

If you upgrade the pump you may have too rich of an idle and foul the plugs. Check your plugs regularly soon after putting on the turbo.

Good luck.
Randy

 

First off, I believe the GS-R GReddy kit should be running a bit over 7psi at stock settings.

Since the kit runs with larger injectors than stock, what the blue box does is trim the injector pulsewidth while in vacuum such that you're getting the same amount of fuel as if you had your stock injectors, but then in boost, the injectors open up more and supply you with enough fuel.

According to a dyno chart at turbocivicsi.com, the blue box runs the car really rich at high rpm (for safety's sake). If you want to unleash a good amount of power, get a Hondata with boost option and some good tuning.

 

hey guys thanks alot for all the experiences. I know these are basic questions for all turbo tech's, but this has helped alot.