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what size injectors

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Old 07-18-2006, 09:29 PM
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bufwrastler215
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Default what size injectors

ok well i am looking at getting bigger injectors for my 91 gt. it has a fully built 302. it has the stock 19# in it right now and i know that is holding the car back a little bit. but i plan on supercharging with no more then 10psi of boost but i dont know if 30# injectors would do or should i go with 42# injectors.
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Old 07-18-2006, 09:34 PM
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mrbigshot
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Default RE: what size injectors

whats fully built? i think to be safe the 36 or 42 pounders would be the safe bet. a fairly stout n/a street/ strip 5.0 rarely needs over 24#'s. its better to be safe than sorry.
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Old 07-18-2006, 09:45 PM
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bufwrastler215
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Default RE: what size injectors

fully built as in its got a hawaii racing short block with afr heads,trick flow intake, and e303 cam. and a few other accesorys.
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Old 07-19-2006, 01:20 AM
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Ecstasy
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Default RE: what size injectors

yea you def wanna go 24# or bigger if your going to supercharge it go with 42#.
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Old 07-19-2006, 01:22 AM
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OnyxCobra
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Default RE: what size injectors

I'd go with 42lbers also
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Old 07-19-2006, 01:36 AM
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Ecstasy
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Default RE: what size injectors

if your not gonna supercharge it though, go with 36. becuase around 300hp you wanna go with 24#'s then around 400 you wanna go with 36#. i have a program that determines the size injectors you need for how much hp.

heres an example(btw this is for 8 cylinders):

400 hp(no forced induction) = injector size = 31.25 which they dont have those so 36# would be good.
400 hp(supercharged) = injector size = 39.06 which they dont have those so 42# would be good.
400 hp(turbocharged) = injector size = 37.5 which they dont have so 42# again.

just for future reference if anybody wants to know what size injectors they need i can calculate the hp & cylinders to get the injector size you need.
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Old 07-19-2006, 01:51 AM
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Default RE: what size injectors


ORIGINAL: Ecstasy

if your not gonna supercharge it though, go with 36. becuase around 300hp you wanna go with 24#'s then around 400 you wanna go with 36#. i have a program that determines the size injectors you need for how much hp.

heres an example(btw this is for 8 cylinders):

400 hp(no forced induction) = injector size = 31.25 which they dont have those so 36# would be good.
400 hp(supercharged) = injector size = 39.06 which they dont have those so 42# would be good.
400 hp(turbocharged) = injector size = 37.5 which they dont have so 42# again.

just for future reference if anybody wants to know what size injectors they need i can calculate the hp & cylinders to get the injector size you need.
You are using some big BFSCs. With those ratios, 42s are only good to 448hp on a turbo motor.

I'd go with a 30lb N/A or a 42lb blown.
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Old 07-19-2006, 02:08 AM
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Ecstasy
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Default RE: what size injectors

yea im just giving an example thats all. hes supercharging it which is why i recommended 42# + hell prob be over 400 hp.

& i dont know exactly what size injectors they sell, all i know is i have 19# and when i get the trickflow kit im going to put 24#, i know they have 36 42 and some idiot that lives by me keeps trying to sell me 6?# injectors which i think hes a moron.
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Old 07-19-2006, 02:08 AM
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+ hell prob be over 400 hp.
Man, I hope so.
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Old 07-19-2006, 02:12 AM
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Default RE: what size injectors


ORIGINAL: FullAuto


ORIGINAL: Ecstasy

+ hell prob be over 400 hp.
Man, I hope so.
+1
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