What size injectors do I need?
01-19-2011, 01:30 PM
#4
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based on experience & findings from people doing modifications, etc. MY OPINION is if you are sticking NATURALLY ASPIRATED; a set of 37# @ 43.5psi injectors work great and give you some breathing room and are perfectly OK on a stock car, change the IFR and you are USUALLY good to go.
As for the saying with HP, that is how its estimated. www.rceng.com go to technical / sizing page link on the left menu.
FORCED INDUCTION; Usually people start off with 42# @43.5psi injectors and step up if they need to
FYI, LS1 Fuel pressures (STOCK) are 58psi, so an injector rated at 43.5psi @ 37#; is actually a 42# injector at our fuel pressure. confused yet?
That 42# at 43.5psi being used at 58psi (LS1 cars) is actually a 48# injector
ALSO, when you go Forced induction you are pressurizing the ENTIRE intake, hence, there is pressure there, and that is why people get Fuel Pressure Regulators and attach them to the Manifold pressure.
Say you have 42# injectors rated at 60psi, say you are running 10LBs of boost.
Well, at that boost level, your injectors are effectively 50psi rating. So you better be damn sure you have enough injector at the rating where your equivalent fuel pressure is due to boost.
As for the saying with HP, that is how its estimated. www.rceng.com go to technical / sizing page link on the left menu.
FORCED INDUCTION; Usually people start off with 42# @43.5psi injectors and step up if they need to
FYI, LS1 Fuel pressures (STOCK) are 58psi, so an injector rated at 43.5psi @ 37#; is actually a 42# injector at our fuel pressure. confused yet?
That 42# at 43.5psi being used at 58psi (LS1 cars) is actually a 48# injector
ALSO, when you go Forced induction you are pressurizing the ENTIRE intake, hence, there is pressure there, and that is why people get Fuel Pressure Regulators and attach them to the Manifold pressure.
Say you have 42# injectors rated at 60psi, say you are running 10LBs of boost.
Well, at that boost level, your injectors are effectively 50psi rating. So you better be damn sure you have enough injector at the rating where your equivalent fuel pressure is due to boost.
01-20-2011, 06:16 PM
#7
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based on your numbers.you need a 42lb inj @58psi.you have some options you can re size your factory inj.or buy new ones here's the links.
http://www.corvetteinjectors.com/sho...p?productid=37
http://fuelinjectorconnection.com/sh...iewDoc&docId=6
http://www.corvetteinjectors.com/sho...p?productid=37
http://fuelinjectorconnection.com/sh...iewDoc&docId=6
