Injector Question
03-11-2008, 12:02 PM
#1
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Injector Question
I was wondering what the stock injector flow rate is in pounds? Its for an 88 TBI code E.
and can it handle a few pounds more without any other upgrades?
Thanks.
and can it handle a few pounds more without any other upgrades?
Thanks.
03-12-2008, 10:35 AM
#2
Re: Injector Question
L83 injectors (350 Cross-Fire)
GM5233770*RPD (rear)
GM5233775*RPD (front
LU5 injectors (305 Cross-Fire)
GM5234255*RPD (front)
GM5233765*RPD (rear)
App | Part # NEW | Part # REMAN'D
350 CFI *rear* | 57204 | 27629
350 CFI *front* | 57205 | 27636
350 2bbl Truck | 57202 | 27620
454 2bbl Truck (89) | 57021 | 27625
454 2bbl Truck (92) | 57229 | (none)
305 2bbl F-body (88) | 57020 | 27623
305 CFI *rear* | 57220 | 27626
305 CFI *front* | 57203 | 27632
When you're looking for 454 injectors:
92 454 Chevy Pickup
17084304RPD
9211GM
Injector sizes: (in ml/cycle)
350 CFI Rear: 114
350 CFI Front: 111
350 2bbl truck: 103
454 2bbl early: 124
454 2bbl late: 129
305 F-body: 91
305 CFI Rear: 101
305 CFI Front: 100
55# comes to mind for 305 cid
yes. it can handle significantly higher pressure.
GM5233770*RPD (rear)
GM5233775*RPD (front
LU5 injectors (305 Cross-Fire)
GM5234255*RPD (front)
GM5233765*RPD (rear)
App | Part # NEW | Part # REMAN'D
350 CFI *rear* | 57204 | 27629
350 CFI *front* | 57205 | 27636
350 2bbl Truck | 57202 | 27620
454 2bbl Truck (89) | 57021 | 27625
454 2bbl Truck (92) | 57229 | (none)
305 2bbl F-body (88) | 57020 | 27623
305 CFI *rear* | 57220 | 27626
305 CFI *front* | 57203 | 27632
When you're looking for 454 injectors:
92 454 Chevy Pickup
17084304RPD
9211GM
Injector sizes: (in ml/cycle)
350 CFI Rear: 114
350 CFI Front: 111
350 2bbl truck: 103
454 2bbl early: 124
454 2bbl late: 129
305 F-body: 91
305 CFI Rear: 101
305 CFI Front: 100
55# comes to mind for 305 cid
yes. it can handle significantly higher pressure.
03-12-2008, 11:16 AM
#3
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Re: Injector Question
well.. thanks for the chinese, but the only thing I got out of that was yes it can take higher pressure. I need to know what the stock pressure is, and how much higher of a pressure it can take benefitting me in horsepower, before I would have to replace other parts like pumps and intake. or before there is no HP gain and just waisting fuel.
Im not familiar with injectors at all, I just know I have to replace mine and wondering whats best to pop in. At my parts store my choices look to be anywhere from 15 to 32 lbs.
Im not familiar with injectors at all, I just know I have to replace mine and wondering whats best to pop in. At my parts store my choices look to be anywhere from 15 to 32 lbs.
Last edited by YigyYo; 03-12-2008 at 11:24 AM.
03-12-2008, 11:27 AM
#4
Re: Injector Question
stock early TBI = 12 lbs
no benefit to higher pressure unless there is a need due to mods to engine(exhaust, intake, heads, cam etc) requiring more fuel. the A/F is commanded in the .bin typically 12.3/1 or so for WOT. Increasing the fuel pressure without accomodating with a .bin change will make you run very rich. I think some of us have run stock injectors at >28 lbs.
no benefit to higher pressure unless there is a need due to mods to engine(exhaust, intake, heads, cam etc) requiring more fuel. the A/F is commanded in the .bin typically 12.3/1 or so for WOT. Increasing the fuel pressure without accomodating with a .bin change will make you run very rich. I think some of us have run stock injectors at >28 lbs.
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