Tan top max HP
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Joined: Mar 2012
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Tan top max HP
I PROMISE i searched
I got a lot of different answers
The anserws I was reading was 7.5psi on the greddy 15g?
but im boosting 10psi, 12 to 1 rise rate disc, highpressure fuel pump and a front mount
I initially started the search to see if i can bump it up to 12psi on my t25 turbo (figured its so tiny)
itd be cool if i can get some personal opinions
And please, i know, Megasquirt, but its not in my budget yet :(
EDIT
Either max hp or psi on that turbo in particular
I got a lot of different answers
The anserws I was reading was 7.5psi on the greddy 15g?
but im boosting 10psi, 12 to 1 rise rate disc, highpressure fuel pump and a front mount
I initially started the search to see if i can bump it up to 12psi on my t25 turbo (figured its so tiny)
itd be cool if i can get some personal opinions
And please, i know, Megasquirt, but its not in my budget yet :(
EDIT
Either max hp or psi on that turbo in particular
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Thread Starter
Junior Member
Joined: Mar 2012
Posts: 124
Total Cats: -160
with .50 fuel consumption, it says im good for about 300bhp, is that possible? how come people were saying they were 100% duty cycle at only 7.5psi on the 15g when im running 10psi on my t25..
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You may actually want to read the information that is prominently placed nearly at the top of the page for answers about BSFC.
Secondly, the 15g is different from the t25G and it's fuel consumption.
Secondly, the 15g is different from the t25G and it's fuel consumption.
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Thread Starter
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Joined: Mar 2012
Posts: 124
Total Cats: -160
I dont see anything about fuel consumption, and yeah... im aware they are different turbos, i was just stating the names because i know you guys would flame on me and what my setup/turbo is, etc.
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Selecting the Proper Injector Size
In order to select the correct size injector for your application, you might wish to use one of the following formulas.
In most cases a naturally aspirated engine will have a B.S.F.C of .50. This means that the engine will use .50 lbs. of fuel per hour for each horsepower it produces. Turbocharged engines will want to be at .60 lbs. per hour or higher.
Using these numbers as a guideline, you can select the approximate injector size in the following formula for a four cylinder, naturally aspirated engine at 200 bhp.
Most injectors will max out at 80% duty cycle and this is the accepted industry standard.
B.S.F.C is brake specific fuel consumption - How much fuel you are using per horsepower per hour
In order to select the correct size injector for your application, you might wish to use one of the following formulas.
In most cases a naturally aspirated engine will have a B.S.F.C of .50. This means that the engine will use .50 lbs. of fuel per hour for each horsepower it produces. Turbocharged engines will want to be at .60 lbs. per hour or higher.
Using these numbers as a guideline, you can select the approximate injector size in the following formula for a four cylinder, naturally aspirated engine at 200 bhp.
Most injectors will max out at 80% duty cycle and this is the accepted industry standard.
B.S.F.C is brake specific fuel consumption - How much fuel you are using per horsepower per hour
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No it's not correct.
300bhp requires 640cc injectors (BSFC of .65 and a max DC of 80%).
to get your current injectors to flow 640cc's worth of fuel you need a fuel pressure around 340psi - stock is 43.5psi, NOT going to happen...
I worked all this out from the RCEng site.
Search more, and actually read what you've searched!
300bhp requires 640cc injectors (BSFC of .65 and a max DC of 80%).
to get your current injectors to flow 640cc's worth of fuel you need a fuel pressure around 340psi - stock is 43.5psi, NOT going to happen...
I worked all this out from the RCEng site.
Search more, and actually read what you've searched!
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With stock injectors on boosted car you are already using the "headroom".
305's will get you into the 200-220 range max.
Anything more you need proper management and proper injectors, unless you want to be stupid and run a hackjob setup with extra injectors and whatnot
305's will get you into the 200-220 range max.
Anything more you need proper management and proper injectors, unless you want to be stupid and run a hackjob setup with extra injectors and whatnot
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Joined: Jun 2006
Posts: 29,085
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From: Republic of Dallas
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nevermind. not wasting time on this
