fuel injectors and pump limits - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

general23cmp · 11-13-2009, 10:17 PM

At what point (HP) will the stock injectors be insufficient? Same question for fuel pump, without a BAP, and then with a BAP? Going custom forced induction and need to know when to expect to hit the wall with each.

Will@Apf · 11-14-2009, 02:58 AM

Quote:

Originally Posted by general23cmp

At what point (HP) will the stock injectors be insufficient? Same question for fuel pump, without a BAP, and then with a BAP? Going custom forced induction and need to know when to expect to hit the wall with each.

Forced induction??? You already need injectors/fuel pump

mtcwby · 11-14-2009, 03:13 AM

The stock fuel pump will handle well over 600 RWHP easily, but the injectors need to be increased with any forced induction.

Will@Apf · 11-14-2009, 03:29 AM

Quote:

Originally Posted by mtcwby

The stock fuel pump will handle well over 600 RWHP easily, but the injectors need to be increased with any forced induction.

WOW on that fuel pump....bad little suckers..

i replace them over 500rwhp but that's only because i don't like to push things, some call it overkill i just call it safer ..

Sean@Swift · 11-14-2009, 09:52 AM

The Stock pump should do about 600Whp in theory....BUT. What we have seen is that the pump at 90% Duty cycle is good to about 500Whp then it just cant keep up with the normal requested 58Psi.
We just turboed an L99 with a GT37R. We were able to maintain AFR's in the 10.7-11.4 range throughout the pull at 7.5 psi of boost. That made 579.6RWHP and 598RWTQ.
But that was with 65# injectors at 90% duty cycle and they have a delta pressure of 38...they should be 65 at 58psi fuel pressure and should not be anywhere near static (90%dc). Those injectors should be able to support at least 800whp if the 58PSI were maintained by the pump.

general23cmp · 11-14-2009, 10:24 PM

Quote:

Originally Posted by Sean@Swift

The Stock pump should do about 600Whp in theory....BUT. What we have seen is that the pump at 90% Duty cycle is good to about 500Whp then it just cant keep up with the normal requested 58Psi.
We just turboed an L99 with a GT37R. We were able to maintain AFR's in the 10.7-11.4 range throughout the pull at 7.5 psi of boost. That made 579.6RWHP and 598RWTQ.
But that was with 65# injectors at 90% duty cycle and they have a delta pressure of 38...they should be 65 at 58psi fuel pressure and should not be anywhere near static (90%dc). Those injectors should be able to support at least 800whp if the 58PSI were maintained by the pump.

So if I go big enough with my injectors, I should be OK with the stock pump and no BAP? I just wont have the pressure the injectors are rated for. Any downside really? I like the thought of not using a BAP since I think it is bad for pump life.

Sean@Swift · 11-15-2009, 10:52 PM

Quote:

Originally Posted by general23cmp

So if I go big enough with my injectors, I should be OK with the stock pump and no BAP? I just wont have the pressure the injectors are rated for. Any downside really? I like the thought of not using a BAP since I think it is bad for pump life.

IMO the injectors being static in order to keep up is not a good thing. They have no more to give, that being the case, if something were to happen where the fuel pressure dropped for some reason it can not be made up for by the injector duty cycle being opened longer. Also, like I said the Fuel pump is at 90% as well. so as far as pump life goes you have constant full load on it any time you are over 480+ HP. At the same time I have read threads where people are using a BAP and it is doing them some good (Keeps FP up 3-4 psi more than without it) and other threads where it is doing nothing for them. So I am still sorting through all of that as well. With the car I mentioned I think we are going to try a twin pump set up and see what happens. I figure 2 255LPH pumps working at 60-70% under full load is better than one working at 90% all the time. We will keep you updated.

SantosNL · 04-08-2015, 10:10 PM

Sorry I'm a little new to this but what's BAP?

Bo White · 04-08-2015, 10:39 PM

Boost a pump. It adds voltage.

2010SSRSM6 · 04-09-2015, 05:37 AM

My '10 with a cam and header was pushing my comfort level with the factory pump and injectors at 480rwhp. Injectors were maxed out and fuel pressure was inconsistent. If you want to push it to 600rwhp your motor will not last long.

The last thing you want to do is starve the motor of fuel. Look at all the issues the Edlebroc SC's had with breaking the #7 piston due to fuel starvation..... Thanks but a good fuel pump and injectors are a hell of a lot cheaper than a new motor.

Sent from my iPhone using Tapatalk

ToddB · 04-09-2015, 06:46 AM

ZL1 pump and ADM FPCM good for around 650hp

Sent from my iPhone using Tapatalk

PRO CUSTOM MARK · 04-09-2015, 08:57 AM

I'm running 80 lb injectors with the stock pump. 5-6 psi you will be ok. I noticed a couple times at or above 7psi it started to lean out a little. I'm going to drop in a zl1 pump and be done

Bo White · 04-09-2015, 11:18 AM

Those 80lb injectors are bored.

1KillerSS · 04-09-2015, 06:45 PM

Quote:

Originally Posted by 2010SSRSM6

Thanks but a good fuel pump and injectors are a hell of a lot cheaper than a new motor.

This

Last thing I want to do is lose a motor. Failures are going to happen when it comes to power, more power, more stress. But I would rather have small failures that are manageable to fix, then to loose my motor over fuel issues. I think one day when I go forged, I will crank up the boost and see how long it lasts, but thats when I am ready to drop in a new package and have the money set aside for it to happen.

11-13-2009, 10:17 PM	#1
general23cmp Drives: 2010 RS SS Join Date: Aug 2009 Location: Huntsville, AL Posts: 196	fuel injectors and pump limits At what point (HP) will the stock injectors be insufficient? Same question for fuel pump, without a BAP, and then with a BAP? Going custom forced induction and need to know when to expect to hit the wall with each.

11-14-2009, 03:13 AM	#3
mtcwby High on "The Camaro Life" Drives: 2010 2SS, IOM, LS3, Vortech, LG cam Join Date: May 2009 Location: Big Sandy, MT & Yuma, AZ Posts: 1,028 View My Garage	The stock fuel pump will handle well over 600 RWHP easily, but the injectors need to be increased with any forced induction. __________________ "The democracy will cease to exist when you take away from those who are willing to work and give to those who are not."-Thomas Jefferson------Going Strong at 39,250 miles

11-14-2009, 09:52 AM	#5
Sean@Swift Drives: 70 Chevelle Join Date: Aug 2009 Location: Norwich, CT Posts: 14	The Stock pump should do about 600Whp in theory....BUT. What we have seen is that the pump at 90% Duty cycle is good to about 500Whp then it just cant keep up with the normal requested 58Psi. We just turboed an L99 with a GT37R. We were able to maintain AFR's in the 10.7-11.4 range throughout the pull at 7.5 psi of boost. That made 579.6RWHP and 598RWTQ. But that was with 65# injectors at 90% duty cycle and they have a delta pressure of 38...they should be 65 at 58psi fuel pressure and should not be anywhere near static (90%dc). Those injectors should be able to support at least 800whp if the 58PSI were maintained by the pump. __________________ Swift Performance is the Northeast's Installation and Dyno tuning facility for all cars that want speed. Check out our new inventory, and specials on the site!! www.swiftperformanceautomotive.com 860 823-1909

04-08-2015, 10:39 PM	#9
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,107	Boost a pump. It adds voltage. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter, stage 4 cam and Wilkes 11° 65cc heads Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

04-09-2015, 05:37 AM	#10
2010SSRSM6 Drives: My wife crazy with my C5 usage. Join Date: Apr 2009 Location: DFW Posts: 6,553 View My Garage	My '10 with a cam and header was pushing my comfort level with the factory pump and injectors at 480rwhp. Injectors were maxed out and fuel pressure was inconsistent. If you want to push it to 600rwhp your motor will not last long. The last thing you want to do is starve the motor of fuel. Look at all the issues the Edlebroc SC's had with breaking the #7 piston due to fuel starvation..... Thanks but a good fuel pump and injectors are a hell of a lot cheaper than a new motor. Sent from my iPhone using Tapatalk __________________ UNDER CONSTRUCTION......again......

04-08-2015, 10:10 PM	#8
SantosNL Drives: 2012 Camaro 2SS Join Date: Nov 2014 Location: Detroit Mi Posts: 90 View My Garage	Sorry I'm a little new to this but what's BAP?

04-09-2015, 06:46 AM	#11
ToddB Drives: 2011 2SS Convertible Supercharged Join Date: Nov 2010 Location: WI Cert Welder Navy NSSN Posts: 1,157	ZL1 pump and ADM FPCM good for around 650hp Sent from my iPhone using Tapatalk

04-09-2015, 08:57 AM	#12
PRO CUSTOM MARK Drives: 2010 Camaro 2SS TURBO Join Date: Oct 2014 Location: Elizabeth, CO Posts: 32	I'm running 80 lb injectors with the stock pump. 5-6 psi you will be ok. I noticed a couple times at or above 7psi it started to lean out a little. I'm going to drop in a zl1 pump and be done

04-09-2015, 11:18 AM	#13
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,107	Those 80lb injectors are bored. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter, stage 4 cam and Wilkes 11° 65cc heads Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

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