Injector Size
06-30-2009, 06:12 PM
#1
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Injector Size This was briefly discussed in another thread so I am starting a new one so that I dont hijack someone elses thread.
If I am running 450 to 475 RWHP with the setup listed below...what size injectors?
I can get a set of 30# SVO's cheap as hell, and I have an adjustable fuel pressure regulator that goes up to 60#...I am running 47#'s idle and 50#'s WOT right now. At 60# of FP don't 30# injectors run 36#? What kind of workload does that put on those 30's???
If I am running 450 to 475 RWHP with the setup listed below...what size injectors?
I can get a set of 30# SVO's cheap as hell, and I have an adjustable fuel pressure regulator that goes up to 60#...I am running 47#'s idle and 50#'s WOT right now. At 60# of FP don't 30# injectors run 36#? What kind of workload does that put on those 30's???
06-30-2009, 06:16 PM
#2
This was briefly discussed in another thread so I am starting a new one so that I dont hijack someone elses thread.
If I am running 450 to 475 RWHP with the setup listed below...what size injectors?
I can get a set of 30# SVO's cheap as hell, and I have an adjustable fuel pressure regulator that goes up to 60#...I am running 47#'s idle and 50#'s WOT right now. At 60# of FP don't 30# injectors run 36#? What kind of workload does that put on those 30's???
If I am running 450 to 475 RWHP with the setup listed below...what size injectors?
I can get a set of 30# SVO's cheap as hell, and I have an adjustable fuel pressure regulator that goes up to 60#...I am running 47#'s idle and 50#'s WOT right now. At 60# of FP don't 30# injectors run 36#? What kind of workload does that put on those 30's???
You'll want some SVO 36# injectors to handle 450 rwhp and stay under 80% duty cycle.
06-30-2009, 06:18 PM
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I can get a set of 30's for 50 bucks brand new right now from a friend...would those tide me over for a while till I get 36's? Or should I just wait?
06-30-2009, 06:22 PM
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If you think you will get that kind of power N/A then here is a rough formula to help you chose:
N/A flywheel hp X 0.07= minimum acceptable injector size.
30# injectors would be overwhelmed with that kind of power output. There is absolutely no reason to turn your fuel pressure up more than stock. The way I understand is even if that happens the PCM will compensate.
N/A flywheel hp X 0.07= minimum acceptable injector size.
30# injectors would be overwhelmed with that kind of power output. There is absolutely no reason to turn your fuel pressure up more than stock. The way I understand is even if that happens the PCM will compensate.
06-30-2009, 06:26 PM
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http://cgi.ebay.com/ebaymotors/ws/eB...m=150352744715
Are these good ones, or should I go with the actual Ford SVO ones?
Are these good ones, or should I go with the actual Ford SVO ones?
06-30-2009, 06:29 PM
#7
http://cgi.ebay.com/ebaymotors/ws/eB...m=150352744715
Are these good ones, or should I go with the actual Ford SVO ones?
Are these good ones, or should I go with the actual Ford SVO ones?
Another option is to do what I did...install some '03/'04 Cobra 39# injectors.
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06-30-2009, 07:43 PM
#11
IMO you will fall short of that power goal with the parts listed.
Short enough that the 30lbs SVOs at 50psi will be just fine.
A friend has a 383 topped with TPIS ported AFRs, had the ZZ409 cam and when the thing pushed a sleeve he had it rebuilt with a ZZ-X. It is in an f-body and wont touch my car. Makes I think 365rwhp through the T56. He enjoys it but would love to buy his old heads back, because they were the cores I sent to AI.
Short enough that the 30lbs SVOs at 50psi will be just fine.
A friend has a 383 topped with TPIS ported AFRs, had the ZZ409 cam and when the thing pushed a sleeve he had it rebuilt with a ZZ-X. It is in an f-body and wont touch my car. Makes I think 365rwhp through the T56. He enjoys it but would love to buy his old heads back, because they were the cores I sent to AI.
06-30-2009, 10:26 PM
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right now its the POS stock cam...some dipshit in Colorado thought it would be a great idea to remove the TPiS cam and install the stock to help it pass Co emissions so he could sell it...it was a dealership and they are homo's. I have been trying to get the time to install it ever since cause they sold me the TPiS cam with the car thankfully...
06-30-2009, 10:41 PM
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Im sorry. But either some one lied to you or your just a little 
. B/c there is no LT1 motor out there with bolt-ons and a set of heads on a factory cam doing anything like 365rwhp. It is impossible. Unless there is some N20 involved or boost. JUST ISNT GOING TO HAPPEN. Sorry, dont even try to rebuttle an argument on this b/c it is a loosing battle. There is no shame in saying that I have no idea of the HP. No need to try to give a reach around on this one.
But on your question 36's will be need to support the 450rwhp but on from what you have stated as mods and the future mods. 30's will be perfect.
. B/c there is no LT1 motor out there with bolt-ons and a set of heads on a factory cam doing anything like 365rwhp. It is impossible. Unless there is some N20 involved or boost. JUST ISNT GOING TO HAPPEN. Sorry, dont even try to rebuttle an argument on this b/c it is a loosing battle. There is no shame in saying that I have no idea of the HP. No need to try to give a reach around on this one.But on your question 36's will be need to support the 450rwhp but on from what you have stated as mods and the future mods. 30's will be perfect.
06-30-2009, 10:45 PM
#17
With the AFRs ported and a different cam, then sure! As it stands now with what you have listed 30# SVOs will be plenty.
06-30-2009, 10:48 PM
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plus a .030 bore...how is there "no way"??? considering it had 305 stock off the showroom floor??? your saying that everything I have done to thios car didnt add over 60 horses?? REALLY??!!
06-30-2009, 11:06 PM
#19
You apparently do not understand the difference between FWhp and RWhp???
The .030 overbore means little, hell if cheap heavy pistons were used with a thick parasitic ringpack the argument could be made you were better off stock.
As you learn you will understand a LOT of LT1s are taken a step backwards with intentions of a step forward. People buy $300 forged pistons, they can be strong and well made but if they have thick rings they will hurt power compared to stock.
TPIS stuff is GROSSLY overpriced and overrated, you wont find much in the way of sucessful examples of their stuff, you will find things like magazine articles.
The .030 overbore means little, hell if cheap heavy pistons were used with a thick parasitic ringpack the argument could be made you were better off stock.
As you learn you will understand a LOT of LT1s are taken a step backwards with intentions of a step forward. People buy $300 forged pistons, they can be strong and well made but if they have thick rings they will hurt power compared to stock.
TPIS stuff is GROSSLY overpriced and overrated, you wont find much in the way of sucessful examples of their stuff, you will find things like magazine articles.
06-30-2009, 11:16 PM
#20
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I'm not gonna lie, I am not completely educated in that area, however I know it was dyno'd before I bought it WITH the cam in it before it was bored .030 and it pushed 425 on the dyno...
