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-   -   No Fuel Management at 4psi and under... (https://www.homemadeturbo.com/forced-induction-7/no-fuel-management-4psi-under-39898/)

samson 05-21-2005 08:45 PM

No Fuel Management at 4psi and under...
 
I didn't think this should be in the fuel management because it is dependent on the boost psi not anything else really. Anyway, I was curious if for now, I could run say 4psi of boost without any fuel manangement upgrades (Uberdata, injectors, etc.) until I get the rest to bump it to 8psi-10psi? I don't see why not, but what's holding me back I think is my internal WG. However, it is adjustable. How adjustable I have no idea. So anyone think if I could set my WG to 4psi I would be alright? Thanks alot fellas! ;D


JP

04civiclx 05-21-2005 10:00 PM

Re: No Fuel Management at 4psi and under...
 
Almost all stock fuel systems can manage 20% more power as a rule of thumb. Tell me what car, hp, and number of injectors and ill tell you if you are going to break anything.

Or wait ... here is the formula hp(at flywheel) x bsfc (.7) [bsfc = brake specific fuel consumption]
number of injectors x duty cycle (.8 is safe)

divide the hp at flywheel x bsfc by the number of injectors x the duty cycle .... that tells you the size of injectors you need, then match that up to stock numbers and you will know if it will work out ok.... if you dont understand this formula just give me the above info and ill let you know. Hope this helped.

hotrex 05-22-2005 06:32 AM

Re: No Fuel Management at 4psi and under...
 
you dont even need fuel management for 10 psi.

samson 05-22-2005 07:51 AM

Re: No Fuel Management at 4psi and under...
 

Originally Posted by 04civiclx
Almost all stock fuel systems can manage 20% more power as a rule of thumb. Tell me what car, hp, and number of injectors and ill tell you if you are going to break anything.

Or wait ... here is the formula hp(at flywheel) x bsfc (.7) [bsfc = brake specific fuel consumption]
number of injectors x duty cycle (.8 is safe)

divide the hp at flywheel x bsfc by the number of injectors x the duty cycle .... that tells you the size of injectors you need, then match that up to stock numbers and you will know if it will work out ok.... if you dont understand this formula just give me the above info and ill let you know. Hope this helped.


PM'd.


JP

samson 05-22-2005 06:21 PM

Re: No Fuel Management at 4psi and under...
 
Bump for more replies! Thanks! :P


JP

SpankedYA! 05-22-2005 07:04 PM

Re: No Fuel Management at 4psi and under...
 
No can't. Absolutely not.

Koby 05-22-2005 07:25 PM

Re: No Fuel Management at 4psi and under...
 
Most wastegates won't let you run that low of boost.

samson 05-22-2005 07:35 PM

Re: No Fuel Management at 4psi and under...
 
Thanks alot guys! All I need to know.


JP

sohc_mshue 05-22-2005 08:08 PM

Re: No Fuel Management at 4psi and under...
 

Originally Posted by hotrex
you dont even need fuel management for 10 psi.

this guy knows his stuff ;D

btw good luck with your map sensor trying to boost without check valves or something.

04civiclx 05-24-2005 02:19 PM

Re: No Fuel Management at 4psi and under...
 
If your running 10psi without any fuel upgrades your going to burn stuff up pretty damn quick, i wasnt talking about fuel management. I was answering whether or not he needed new injectors, which he would and he needs a new fuel pump as well. If not then its not a stable turbo setup.

samson 05-24-2005 02:39 PM

Re: No Fuel Management at 4psi and under...
 
I'm not boosting that high without fuel managment nignogs. :P I was wondering about low like 4psi until I get my other stuff. THEN fuel managment. I'm just going to hold off and wait to do it all at once. I asked because I thought I saw one of the Turbo Projects run no fuel managment at 4psi. Thanks for the help anyway fellas!


JP

hotrex 05-24-2005 02:57 PM

Re: No Fuel Management at 4psi and under...
 
samson, you are ignorant to even ask this question.

go ahead and try no management on 4 psi, and you let me know what happens, make a video actually.

all the time spent harrassing csaddict on aim and you still have no clue...

time to break out the rope and han-gurself
you really have no business turboing a honda.

several people tell you you need management and the fact that it doesnt sink in shows me you lack common sense and possess no mechanical skill.

samson 05-24-2005 04:23 PM

Re: No Fuel Management at 4psi and under...
 

Originally Posted by hotrex
samson, you are ignorant to even ask this question.

go ahead and try no management on 4 psi, and you let me know what happens, make a video actually.

all the time spent harrassing csaddict on aim and you still have no clue...

time to break out the rope and han-gurself
you really have no business turboing a honda.

several people tell you you need management and the fact that it doesnt sink in shows me you lack common sense and possess no mechanical skill.


https://www.homemadeturbo.com/turbo_projects/d16z6/

Here is a better shot of the charge pipes, very simple. Our first test drive the boost was going crazy. The wastegate actuator was all fucked up and jammed and would not move. So I came up with this idea. Why not just take the wastegate actuator off and put a small carb return spring holding tension against the wastegate flapper, then when boost hits it will force the flapper open? Well we tried it and it worked incredibly good. Boost was set right at 6psi. We used no fuel managment on this car.

This is why I asked. :-*


JP

Dr.Boost 05-24-2005 04:59 PM

Re: No Fuel Management at 4psi and under...
 
No. Don't run boost with no fuel management. That's like having sex with a veteran prostitute without a condom.

The MAP sensor is going to see boost and throw a CEL. The injectors are already maxed out without the boost at stock fuel pressure. You're asking for trouble if you run no fuel management. If you're not going to take any advise that you don't want to hear, don't post questions.
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idiot-stick 05-24-2005 06:04 PM

Re: No Fuel Management at 4psi and under...
 
As a rule of thumb, I always get the fuel management squared away, drive on it NA to make sure everything is in order, then install the turbo

samson 05-24-2005 08:56 PM

Re: No Fuel Management at 4psi and under...
 
Man. I said I was going to hold off and wait until I get the rest of my fuel managment stuff then boost. I listened to what everyone said. I'm just going to wait. I must not explained myself well enough or something, but yes I'm not boosting low boost without fuel managment I'm just going to wait until I get the rest of my stuff. Thanks guys.


JP

hotrex 05-25-2005 07:48 PM

Re: No Fuel Management at 4psi and under...
 
samson your a dumb ------, i cant believe that between yuo and your father you guys still lack the common sense equivalent to ONE eight yr old child.

2 heads are usually better than one, but apparently in your case two heads are worse than NONE.

get yourself a fmu if u are hell bent on a homo setup.


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