recommend me some injectors
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Joined: Aug 2008
Posts: 153
recommend me some injectors
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
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Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
To get minimum injector size, multiply estimate flywheel HP X 0.07
Example:
500 flywheel HP x 0.07 = 35 #/HR
You can go larger - within reason, it will not cause any problems.
With a wet nitrous system, you size the injectors only for peak NA HP, since the extra fuel required for the nitrous does not pass through the injectors.
Avoid brands like Accel and Venom. Consider Delphi, Ford SVO. Take a look at the Racetronix injector choices.
Example:
500 flywheel HP x 0.07 = 35 #/HR
You can go larger - within reason, it will not cause any problems.
With a wet nitrous system, you size the injectors only for peak NA HP, since the extra fuel required for the nitrous does not pass through the injectors.
Avoid brands like Accel and Venom. Consider Delphi, Ford SVO. Take a look at the Racetronix injector choices.
Registered User
Joined: Jul 2002
Posts: 1,942
From: Kissimmee, Fl, USA
You'll be safe with 32 pounders. The formula that Injuneer gave you estimates an 80% duty cycle...you wouldn't need 36's for any real reason. As Injuneer mentioned, you certainly can go larger but you don't need too for safety sake.
Registered User
Joined: Jun 2006
Posts: 2,092
From: lakeville, pa
i have a very similar setup and i went with a 30# svo
the more i see the more i wish i had gone with something larger
i would consider these 37# injectors from delphi/racetronix
http://goo.gl/irLl
the more i see the more i wish i had gone with something larger
i would consider these 37# injectors from delphi/racetronix
http://goo.gl/irLl
Registered User
Joined: Oct 2009
Posts: 176
From: Dallas, TX
To get minimum injector size, multiply estimate flywheel HP X 0.07
Example:
500 flywheel HP x 0.07 = 35 #/HR
You can go larger - within reason, it will not cause any problems.
With a wet nitrous system, you size the injectors only for peak NA HP, since the extra fuel required for the nitrous does not pass through the injectors.
Avoid brands like Accel and Venom. Consider Delphi, Ford SVO. Take a look at the Racetronix injector choices.
Example:
500 flywheel HP x 0.07 = 35 #/HR
You can go larger - within reason, it will not cause any problems.
With a wet nitrous system, you size the injectors only for peak NA HP, since the extra fuel required for the nitrous does not pass through the injectors.
Avoid brands like Accel and Venom. Consider Delphi, Ford SVO. Take a look at the Racetronix injector choices.
Registered User
Joined: Feb 2003
Posts: 2,639
From: Mooresville, NC
Administrator
Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
My comments regarding Accel and Venom injectors are based solely on what seems to be a large number problems I have seen reported on this and several other F-Body forums I've participated in over the last 12 years. I have not personally tried them.
That is not to say that every install of an Accel or a Venom injector will fail, only that it appears that you have reduced the chance of success by selecting them. If yours worked for several years with no problems, your roll of the dice came up in your favor.
That is not to say that every install of an Accel or a Venom injector will fail, only that it appears that you have reduced the chance of success by selecting them. If yours worked for several years with no problems, your roll of the dice came up in your favor.
Registered User
Joined: Jul 2002
Posts: 1,942
From: Kissimmee, Fl, USA
My apologies for the incorrect information.
On to another point:
One thing to take into account is the fuel pressure used to generate the rated fuel flow. I believe Ford uses 38psi in their fuel systems and we use 43.5psi in ours. A 30#/hr SVO injector would flow 32#/hr in our fuel system....
On to another point:
One thing to take into account is the fuel pressure used to generate the rated fuel flow. I believe Ford uses 38psi in their fuel systems and we use 43.5psi in ours. A 30#/hr SVO injector would flow 32#/hr in our fuel system....
Administrator
Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
Ford runs their fuel systems at 2.7 bar = 39.15 psi. To correct to the flow at 43.5 psi, multiply by 1.054
The LS1 engines run at 4 bar = 58.0 psi
Injectors made for those engines are flow rated at the system operating pressure.
The LS1 engines run at 4 bar = 58.0 psi
Injectors made for those engines are flow rated at the system operating pressure.
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Joined: Oct 2001
Posts: 1,517
From: Engineerland
I would run a 32 or if you plan to up the power later a 36lb. Try to match the injector to what the engine will actually produce now not next time you build it. I would lean toward the 32lb over the 36 with what you're doing, the calculation Injuneer gave you is fairly conservative imo.
Preferably these injectors, since they are the newest design and will give the best performance and response under cruise and idle conditions. The price is right too.
http://fuelinjectorconnection.com/sh...&productId=206
Preferably these injectors, since they are the newest design and will give the best performance and response under cruise and idle conditions. The price is right too.
http://fuelinjectorconnection.com/sh...&productId=206
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