V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Quick and easy question about injectors.

Old Oct 25, 2004 | 02:38 PM
  #1  
Jerriko 3.4's Avatar
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From: Rockford, IL
Car: 1987 Firebird Formula
Engine: 3.4L 207 V6
Transmission: T5 W/C
Quick and easy question about injectors.

I was told by someone that the stock injectors mated with a 2.8L were 14 lbs/hr. Can anyone verify this?

-Bonus question
Anyone know what the lbs/hr were for the injectors equipped on the 350 TPIs?
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Old Oct 25, 2004 | 03:03 PM
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From: Dallas, TX area
Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
I can answer the bonus question: 22 lb/hr on the stock 350 TPI (19 on the 305 TPI)

So, what do I win????
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Old Oct 25, 2004 | 03:06 PM
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Jerriko 3.4's Avatar
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From: Rockford, IL
Car: 1987 Firebird Formula
Engine: 3.4L 207 V6
Transmission: T5 W/C
Sorry, but you can only win if you answer the first question. The answer for the second one only increases the prize.
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Old Oct 25, 2004 | 03:07 PM
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From: Dallas, TX area
Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
D@MN..... foiled again....
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Old Oct 25, 2004 | 03:52 PM
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
13pph on the 2.8, stock.

22pph on the 350! I'm using those now! What do I win!?
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Old Oct 25, 2004 | 04:10 PM
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Jerriko 3.4's Avatar
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From: Rockford, IL
Car: 1987 Firebird Formula
Engine: 3.4L 207 V6
Transmission: T5 W/C
Originally posted by Doward
13pph on the 2.8, stock.

22pph on the 350! I'm using those now! What do I win!?
You would not happen to know what the part number is for the injector on the 350 TPI one, would you? I am pretty sure I got the injectors from a 350 TPI but I just need to make sure.
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Old Oct 25, 2004 | 05:23 PM
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
kinda sort on on/off topic, but teh 3800 injectors are 22
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Old Oct 26, 2004 | 08:07 AM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Originally posted by Jerriko 3.4
You would not happen to know what the part number is for the injector on the 350 TPI one, would you? I am pretty sure I got the injectors from a 350 TPI but I just need to make sure.
The part number for the 1986 5.7 Y-bodies was 5235211.
The part number for the 1987 and 1988 5.7 F and Y bodies was 5235302.
The part numbers for the 1989 thru 1992 F-body 5.7 TPI's were 17086544 and 17086545.

These numbers are as found on the injector body.

The stock 2.8l injectors are in the range of 15.5#/hr to 16#/hr.

RBob.
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Old Oct 26, 2004 | 02:01 PM
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Jerriko 3.4's Avatar
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From: Rockford, IL
Car: 1987 Firebird Formula
Engine: 3.4L 207 V6
Transmission: T5 W/C
Ok, now I have #'s on the stock 2.8L injectors ranging from 13 to 15.5/16 lbs/hr. Does anyone really know what they are?
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Old Oct 26, 2004 | 02:36 PM
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
(135 x .50) / (6 x .80) = LB RATING
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Old Oct 26, 2004 | 07:11 PM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Originally posted by Jerriko 3.4
Ok, now I have #'s on the stock 2.8L injectors ranging from 13 to 15.5/16 lbs/hr. Does anyone really know what they are?
Here is a recent post where 2.8l injectors were flow tested:

https://www.thirdgen.org/techbb2/sho...hreadid=263057

Older posts show the same 15.5#/hr - 16#/hr which is the same flow rating of the 3.1l injectors.

The biggest problem with flowing injectors is the conversion from liquid volume to weight. Or from the density of a safe test liquid to gasoline (whatever that may be today). As such the #/hr rating will vary.

RBob.
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