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Injector & Fuel Pressure Talk - Turbo Application 

 

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SVO XR6
Posted: Wed Mar 09, 2005 1:30 pm 
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CHEF wrote:
wouldnt think 6 300cc injs flow enough to suport 300rwkw...


i would have tought a 52 lb injector???

 

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pyroay
Posted: Wed Mar 09, 2005 1:47 pm 
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6 x 70hp bosch injectors
Bosch 550hp fuel pump.

The fuel system gets to approx 70% duty cycle at max power with the current fuel pressure

 

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Last edited by pyroay on Wed Mar 09, 2005 2:33 pm, edited 1 time in total.
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SVO XR6
Posted: Wed Mar 09, 2005 1:58 pm 
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holy s**t!
does it idle ok?

 

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Dansedgli
Posted: Wed Mar 09, 2005 2:21 pm 
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I didnt realise injector could go above 100% duty cycle. Mine only reach 60% at full power.
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pyroay
Posted: Wed Mar 09, 2005 2:33 pm 
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Typo - corrected

 

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SVO XR6
Posted: Wed Mar 09, 2005 3:05 pm 
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hahaha, thats better

does the wolf run staged injection?

 

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CHEF
Posted: Wed Mar 09, 2005 3:18 pm 
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yeah wolf does staged.

My 550cc's are at around 60% duty, though I havnt dynoed yet so its only what I read off the wolf display... was about 10ish psi
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SVO XR6
Posted: Wed Mar 09, 2005 3:22 pm 
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ok, im stupid so you gotta explain it too me...

550cc injectors = ??lb injectors
???

 

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CHEF
Posted: Wed Mar 09, 2005 3:22 pm 
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50 odd
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SVO XR6
Posted: Wed Mar 09, 2005 3:25 pm 
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and you make how much power???

 

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4.9 EF Futura
Posted: Wed Mar 09, 2005 3:31 pm 
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SVO XR6 wrote:
ok, im stupid so you gotta explain it too me...

550cc injectors = ??lb injectors
???


IIRC

lb/hr x 10.5 = cc/min

52lb/hr = 546cc/min

70lb/hr = 735cc/min

 

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SVO XR6
Posted: Wed Mar 09, 2005 3:41 pm 
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lol

ok, so i got 199.5cc injectors :oops:
and they aint coping!!

100% @ wot (high revs) :(

 

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4.9 EF Futura
Posted: Wed Mar 09, 2005 3:49 pm 
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SVO XR6 wrote:
ok, so i got 199.5cc injectors :oops:


Same here... but im running silly fuel pressure under boost... equivalent of 30lb inj @ 6psi, lol. Only gonna last so long....

 

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SVO XR6
Posted: Wed Mar 09, 2005 4:00 pm 
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ajst fuel reg then?

2:1 ?

 

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4.9 EF Futura
Posted: Wed Mar 09, 2005 4:07 pm 
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I doubt and adj reg would be able to up pressure enough to allow you to get an acceptable duty cycle on n/a...

You dont want the system working that hard all the time.. my pressure gets up around 72psi (from 43ish standard) at full boost but that's only for a few seconds at a time. I havent measured duty cycle but fair to assume it's 100% at full pelt.

Think it's time for you to upgrade....

 

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