LT1-LT4 Modifications 1993-97 Gen II Small Block V8

what injectors?

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Old 05-03-2010, 01:59 AM
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hey guys im building a 355 stock crank, 6.0 forged scat rods, mahle -5cc forged pistons,heads similiar to le2s, 228/236 .565/.565 110 lsa cam, 1.6 rr, 58mm tb, and walbro 255. compression should be about 11:1. it MAY see a 100 shot plate kit maybe. what do you guys recommend and where to get them thanks
Old 05-03-2010, 02:01 AM
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i'd think ford redtops would be fine, i have them in my H/C/I ls1 and im not running out of fuel.
Old 05-03-2010, 09:50 AM
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those are like 30lb injectors right?
Old 05-03-2010, 10:19 AM
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My motor is setup very close to yours and I'm seeing over 90 percent duty cycle over 6000 RPMs with 32 lb racetronix injectors, if I was doing it again I would get 36 or 42 lb injectors just to be safe and allow for future upgrades.
Old 05-03-2010, 10:26 AM
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so i wont matter if i get a bigger injector then i need?
Old 05-03-2010, 07:13 PM
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you may be okay with the ford redtops. You may want to consider 42# just to have some growing room.
Old 05-04-2010, 02:48 PM
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Originally Posted by meangreenchevy
so i wont matter if i get a bigger injector then i need?
I am running the green top 42's cause I got them for a steal, if your tuner is worth anything he can make the larger injectors work just fine. Just don't go overboard with larger injectors if you don't need them.
Old 05-04-2010, 05:02 PM
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I always heard our 24 lb/hr ones were good up to almost 450 rwhp??? Maybe I heard wrong. Perhaps talk to your tuner and see what he recommends for your set-up? I'd think 30's would be enough.
Old 05-04-2010, 05:07 PM
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Originally Posted by 1961ba427
I always heard our 24 lb/hr ones were good up to almost 450 rwhp??? Maybe I heard wrong. Perhaps talk to your tuner and see what he recommends for your set-up? I'd think 30's would be enough.
Stock injectors will be far maxed out by then - no way.
Old 05-04-2010, 05:16 PM
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definately not 450hp on stock injectors
Old 05-04-2010, 05:17 PM
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Originally Posted by RamAir95TA
Stock injectors will be far maxed out by then - no way.
Maybe they meant 450 flywheel HP then? IDK. Was just repeating what I thought I heard to promote discussion, not trying to state a fact. I know there is a chart showing the recommended sizes based on 43 psi, but don't remember where I saw it. Our cars are tuned to run lower psi than that anyway right?
Old 05-04-2010, 05:19 PM
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Originally Posted by Low N Slow
My motor is setup very close to yours and I'm seeing over 90 percent duty cycle over 6000 RPMs with 32 lb racetronix injectors, if I was doing it again I would get 36 or 42 lb injectors just to be safe and allow for future upgrades.
i agree completely, you will be very close with a red top (svo 30#) - i have those and wish i went a little bigger, the next size up racetronix injector looks good (36 or 37 cant remember)

Originally Posted by 1961ba427
I know there is a chart showing the recommended sizes based on 43 psi, but don't remember where I saw it. Our cars are tuned to run lower psi than that anyway right?
our cars run at 43.5, ford uses 39.5 and that is what there injectors are rated at
Old 05-04-2010, 06:02 PM
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run a 36 and be done with it. when i was running gas i was about 80% on 42#ers but my setup was alot more radical.
Old 05-04-2010, 06:02 PM
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isnt there like a ford injector smaller then the red top? but still flows more on a lt1 vs stock lt1 injectors?
Old 05-04-2010, 07:59 PM
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sorry to hijack but do the make a black top? is it a 60#er
Old 05-04-2010, 08:27 PM
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fords website
http://www.fordracingparts.com/parts...uel%20Metering
Old 05-05-2010, 09:47 AM
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Originally Posted by jay7199
isnt there like a ford injector smaller then the red top? but still flows more on a lt1 vs stock lt1 injectors?
Yes, the 24lb injector...

http://cgi.ebay.com/ebaymotors/SVO-F...Q5fAccessories
Old 05-17-2010, 09:08 AM
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anyone else have any other links? will an ls1 injetor fit an lt1? im looking at a set of 30# svo injectors right now but he dosent know if they will work in an lt1
Old 05-17-2010, 11:40 PM
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Yes they will. I have them in mine.
Old 05-17-2010, 11:45 PM
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Im running them in my car also.


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