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11-21-2017, 10:28 AM
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#1
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Injector sizing
I will be in need of some injectors for my LS1 I am working on building.
Will be stock displacement LS1, compression will be slightly higher than stock, maybe around 11:1? CNC ported 243 heads, valve job, BTR stage 3 cam (can get the specs), LS6 intake, 1-7/8" longtube headers, 3" dual exhaust. I am guessing I will be well under 500 horse at the crank, but this is really my first time building an engine, so I don't know what to expect and don't know where to spec the injectors. The one vendor I have talked to sells Bosch III's and thinks I will need about a 36lb injector at stock pressures. Does that sound like it's in the ballpark?
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11-21-2017, 11:16 AM
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#2
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Sounds like to much, but err on the side of what a cheap OEM injector is available.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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11-21-2017, 11:20 AM
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#3
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Too much? I am way over on the estimate, or too much injector for the power expected?
Not sure what you mean about cheap OEM injector. These would be $144.5 plus shipping for new, flow matched, Bosch III's
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11-21-2017, 11:28 AM
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#4
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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Which car is this for, Polar Bears?
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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11-21-2017, 11:29 AM
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#5
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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The Camaro
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11-21-2017, 11:48 AM
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#6
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11 sec club
Join Date: Aug 2014
Location: Woodbridge
Posts: 834
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Maybe consult with whoever is going to tune it, some injectors are easier to tune then others from what TTP told me. He wanted me to go with TBSS injectors with LS1 pigtails.
__________________
99 Z28 Trick Flow 215s milled to 61cc 228/232 Cam Fast 102 built 4l65e trans 4000 converter 12 bolt 410s Electric WP deleted PS/AC Dyno & Track tuned
2015 ATS Coupe. AWD 2.0 Turbo
2012 2500hd Silverado with LTZ 20s on 35x12.5x20
86 Buick GN Lesabre 1 of 117 (4-Sale)
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11-21-2017, 11:59 AM
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#7
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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36lb at 58psi (stock ls1 pressure) will be fine for that setup. Go 42lb if you want a little room to grow.
__________________
1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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11-21-2017, 01:00 PM
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#8
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,725
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Stock injectors will be fine
__________________
1983 camaro- Scrap
1988 camaro- Also scrap
'05 Silverado- You guessed it, scrap
1988 TRX 250R- Ported w/ high compression on 110 octane- Out 60' your LT1
Jersey Shore Street Car Takeover (JSSCT) Founder
Quote:
Originally Posted by LS1ow
and once i get PHB, what do i ajust it too?
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Quote:
Originally Posted by Jersey Mike
Seven.
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11-21-2017, 01:20 PM
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#9
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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My take on what you've all said;
Quote:
Originally Posted by MDSheds_SS
Maybe consult with whoever is going to tune it, some injectors are easier to tune then others from what TTP told me. He wanted me to go with TBSS injectors with LS1 pigtails.
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Ask someone else 
Quote:
Originally Posted by KirkEvil
36lb at 58psi (stock ls1 pressure) will be fine for that setup. Go 42lb if you want a little room to grow.
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Fine (and too small) 
Quote:
Originally Posted by wretched73
Stock injectors will be fine
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Too big 
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11-21-2017, 01:23 PM
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#10
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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The place I was going to buy from says they will take them back if I have any problems with them, no questions asked. SO I guess if they are way too big or too small, I can just return them for different ones.
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11-21-2017, 01:38 PM
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#11
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by KirkEvil
Go 42lb if you want a little room to grow.
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I probably won't ever do any more to this engine, I am planning on an LS9 after this LS1
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11-21-2017, 01:44 PM
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#12
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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Quote:
Originally Posted by PolarBear
I probably won't ever do any more to this engine, I am planning on an LS9 after this LS1 |
For which car?
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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11-21-2017, 01:50 PM
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#13
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by unstable bob gable
For which car?
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Quote:
Originally Posted by PolarBear
The Camaro
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11-21-2017, 10:22 PM
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#14
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Join Date: Dec 2008
Location: Garwood NJ
Posts: 221
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I use the 60lb motron injectors in most of the stuff I put together. Great spray pattern at low pulse widths and easy to tune. Capable of handling more than you need now, but if you upgrade the engine you won't have to buy more injectors. I ordered 220 lb for mine and hoping it's enough 
__________________
Artie
73 Camaro 25.3 build TT LS in progress
67 Camaro
99 T/A
Other crap not worth mentioning
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11-21-2017, 10:55 PM
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#15
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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Quote:
Originally Posted by PolarBear
I probably won't ever do any more to this engine, I am planning on an LS9 after this LS1 |
I ran ford 30lb svo injectors which are 36lb at ls1 fp to 400rwhp and trapping 118. Then upgraded to 42lb after other mods to 460rwhp and trapping 125. If you eventually throw on an UDP, EWP, and fast intake the 42lb would be better. Overall the price difference is close so worth doing from the start IMO.
__________________
1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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11-22-2017, 07:59 AM
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#16
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by KirkEvil
I ran ford 30lb svo injectors which are 36lb at ls1 fp to 400rwhp and trapping 118. Then upgraded to 42lb after other mods to 460rwhp and trapping 125. If you eventually throw on an UDP, EWP, and fast intake the 42lb would be better. Overall the price difference is close so worth doing from the start IMO.
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Good to know. I think I will be happy with what the LS1 gives me with what I listed. I actually would rather the LS9 but the LS1 stuff I got was a good deal, and there were extras I am using to complete my 5.3 for the other project. I am not looking for max effort out of this engine, just something with a bit more power than the 4.8 that I have in the Firebird. Once I find a takeout LS9 I am planning on putting more money into that, 427 ci, Lingenfelter snout, smaller pullies, ported heads, etc. so the little bit of money I will spend on this will be enough for now.
Oh and UBG, the 5., 5.7 AND the LS9 are all destined for the Camaro
Last edited by PolarBear; 11-22-2017 at 08:00 AM.
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11-22-2017, 11:00 AM
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#17
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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What is the Cummings going into?
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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11-22-2017, 11:04 AM
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#18
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by unstable bob gable
What is the Cummings going into?
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The CAMARO BOB! IT'S ALWAYS THE CAMARO!!
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11-22-2017, 12:58 PM
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#19
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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Quote:
Originally Posted by PolarBear
The CAMARO BOB! IT'S ALWAYS THE CAMARO!! |
The yellow 92 Camaro?
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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11-22-2017, 02:11 PM
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#20
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by unstable bob gable
The yellow 92 Camaro?
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That one too
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11-24-2017, 01:13 AM
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#21
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Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,677
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How is the yellow Camaro's torque arm mount holding up?
__________________
John
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11-24-2017, 11:38 AM
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#22
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by Featherburner
How is the yellow Camaro's torque arm mount holding up? |
Feels good to be able to drive it normal again
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11-24-2017, 12:58 PM
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#23
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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Polar Bears and his Camaros RULE!!!
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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12-20-2017, 12:28 AM
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#24
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NJFBOA Supporting Sponsor
Join Date: Jun 2013
Location: Lindenwold, NJ
Posts: 159
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We use Deatschwerks 42lb/hr injectors on most of our naturally aspirated stuff.
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12-20-2017, 10:31 AM
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#25
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Quote:
Originally Posted by Dave@EFX
We use Deatschwerks 42lb/hr injectors on most of our naturally aspirated stuff.
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Those are pretty expensive, no?
I wound up getting some Gen III Bosch 42s with a no questions asked return/exchange policy from the seller. Inexpensive and I can change them if necessary. I think I paid ~$150 and they forgot to charge me shipping
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