What # injector,383 LS1
02-06-2010, 11:42 PM
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What # injector,383 LS1 I have no clue where to start im putting a 383 LS1 in a 78 Z28,ported LS6 heads,608/596 lift cam,dur is 240/244,4000 stall, what lb and brand injector would be close with this setup ? NA setup
Last edited by 70ls1chevelle; 02-07-2010 at 02:23 PM.
02-07-2010, 07:24 AM
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I would grab somewhere around a 42# to 47# injector, maybe even 50# but I would consider that to be large.
are you staying naturally aspirated or plan on going with some boost?
02-07-2010, 08:28 AM
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how much HP is the 383 putting out? if you take your HP #'s and X's it by 0.070 you will get your injector size that you need to run,.. for example if i have a 400hp car i would do 400 x 0.070 = 28 so i would use 28lb injectors,just a little trick i was taught by a great engine builder, hope this helps
02-07-2010, 02:19 PM
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he didn't say anything about going forced induction...those injectors you have would be FREAKING HUGE for him.
I would grab somewhere around a 42# to 47# injector, maybe even 50# but I would consider that to be large.
are you staying naturally aspirated or plan on going with some boost?
I would grab somewhere around a 42# to 47# injector, maybe even 50# but I would consider that to be large.
are you staying naturally aspirated or plan on going with some boost?
Its is gonna be N/A,plus some spray.I also have no idea what to expect on RWHP, the heads are ported a bunch with 2.02 valves,but its gonna have a ported weiand lingenfelter intake probably not gonna be enough air,vindicator cam . So no clue what hp should be NA ???
02-07-2010, 02:20 PM
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how much HP is the 383 putting out? if you take your HP #'s and X's it by 0.070 you will get your injector size that you need to run,.. for example if i have a 400hp car i would do 400 x 0.070 = 28 so i would use 28lb injectors,just a little trick i was taught by a great engine builder, hope this helps
Flywheel HP or RWHP ??
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02-07-2010, 06:50 PM
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how much HP is the 383 putting out? if you take your HP #'s and X's it by 0.070 you will get your injector size that you need to run,.. for example if i have a 400hp car i would do 400 x 0.070 = 28 so i would use 28lb injectors,just a little trick i was taught by a great engine builder, hope this helps
I would get some 42# or larger injectors honestly. Hell grab some 48# and be done with it.
02-07-2010, 10:19 PM
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Assuming a decent tune, and limiting the duty cycle to 85%, you can only reliably make 400 flywheel HP with a 28#/HR injector. It may sound conservative, but you don't want to push the duty cycle too high. My "rule-of-thumb" (normally aspirated) is multiply flywheel HP by 0.07 to get the minimum injector size. Example.... 500 flywheel HP x 0.07 = 35 #/HR.
