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picking the right rising rate reg 


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Posted: Tue Apr 25, 2006 11:47 pm 
Getting Side Ways
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EDXR8 wrote:
Stock reg has a 1:1 rising rate anyway. And 6x480cc injectors flow enough for 576hp (430kw), so unless you are running more than that, the stock reg with those injectors will be fine.

Should be a good start then untill the top and bottom goes in for its work out and comes out stronger! Then I will probably have to go 600cc in order to run the boost that I want to.
Posted: Wed Apr 26, 2006 1:03 am 
Getting Side Ways

Age: 32

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Location: kadina
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with a tuneable management, and big enough injectors, you would have to be stupid to use a rising rate reg!!!

like tickford says, the whole point is to keep a constant pressure drop across a fuel injector.... it makes for a tuning nightmare when fuel pressure goes up more than manifold pressure. as the fuel numbers are not linear.

eg, at 5psi, at x rpm you may need 8ms injector pulse. and at 10psi, you could be back to 6ms cos you have an extra 20psi rail pressure.

any tuner would throw it in the bin in the case of programmable management, the only time they come in handy is when you have a std management system and injectors and wish to squeeze a couple of extra pounds boost from it, thats why most kits use them, cos they are bolt on, low power, budget orientated systems...

eg, they save you the cost of larger injectors, and programmable ecu



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