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Evil95GT
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« on: October 25, 2004, 09:08:32 PM » |
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Does anyone know what size injectors would be required to run 12-14 psi on a mild 331? A Kenne Bell supercharger would be utilized. I was thinking 42s, but I really don't know. Thanks in advance.  |
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Brian 00GT
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« Reply #1 on: October 28, 2004, 03:26:16 PM » |
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42's would probably be enough, but 55's would have to work a lot less. That is my experience with the mod motors, but I am not sure if it is any different on the pushrod motors.
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Brian Also known as 2000 Fobra R SOLD - 2000 Mustang GT - Full Suspension, Bolt-ons, and T-Trim @ a little psi If you have carried on a conversation with someone for 10 post and have only said five words, you are probably a post whore.
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Evil95GT
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« Reply #2 on: October 28, 2004, 03:41:58 PM » |
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Ok, now the second part of the question.........
How much is this gonna cost me? I'm almost afraid to price them out.
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Brian 00GT
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« Reply #3 on: October 28, 2004, 10:34:20 PM » |
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probably between $400 and $450. I got my 42's for $200, but that vendor owed me a favor. |
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Brian Also known as 2000 Fobra R SOLD - 2000 Mustang GT - Full Suspension, Bolt-ons, and T-Trim @ a little psi If you have carried on a conversation with someone for 10 post and have only said five words, you are probably a post whore.
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Evil95GT
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« Reply #4 on: October 29, 2004, 09:32:09 PM » |
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probably between $400 and $450. I got my 42's for $200, but that vendor owed me a favor. That's actually slightly less than I expected. Ford Racing injectors only go up to 36psi, right (for the non-pencil type injectors)? Can you recommend a good brand? Thanks for all the help. |
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Brian 00GT
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« Reply #5 on: October 31, 2004, 07:02:31 PM » |
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Bosch
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Brian Also known as 2000 Fobra R SOLD - 2000 Mustang GT - Full Suspension, Bolt-ons, and T-Trim @ a little psi If you have carried on a conversation with someone for 10 post and have only said five words, you are probably a post whore.
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GotTorque?
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« Reply #6 on: November 01, 2004, 11:44:29 AM » |
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I had an injector size calculator at one point... let me see if I can find it.
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GotTorque?
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« Reply #7 on: November 01, 2004, 11:48:13 AM » |
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Here's the best I could find. Let me know if you have any questions about BSFC or anything! fuel injector calculator |
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T-Trimmed302
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« Reply #8 on: December 30, 2004, 11:24:58 AM » |
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Michelle, 42s would Probably do the Job but they would be on the verge of being Maxed out..My vote goes for a set of 50s.. If you do decide to go 42s though, you can get a BRAND NEW set from Diversified for $259 shipped to your door..Here is the Link if you like..  http://www.buyfordracing.com/Shop_Cart/shopexd.asp?id=152 |
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GotTorque?
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« Reply #9 on: December 30, 2004, 02:10:03 PM » |
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Welcome to the site, T-Trimmed!
Sounds like you'll be a great addition!
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Mr. Black
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« Reply #10 on: December 30, 2004, 02:41:36 PM » |
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50s. |
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We are Steve, resistance is futile!!!
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Freakingstang
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« Reply #11 on: February 06, 2005, 12:55:04 AM » |
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John Ericson had a set of 42 lb injectors that had almost zero miles on them for like 250 I think. He used them for dyno time up at Alternative Auto and they weren't enough. He was at like 537 at the tire, or some ungodly number like that with the T trim. Give him a gingle and score yourself a good set of injectors cheap.
BTW, are these for the KB setup? If so I doubt you will see 14lbs, but I have been wrong before. I am back in town for a little while from work. Let me know if you still need that intake.
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Steve, one of many...
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95 Sleeper
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« Reply #12 on: February 20, 2005, 11:20:12 AM » |
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The boost is actually irvalent, the HP is what matters. I will be reuseing my 42 once I step up to a 331. I was seeing 13psi with the 302 but I know it will not be that high once the better flowing motor is in. I am shooting for a detuned 550rwhp since it is my stock block.
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lwshack
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« Reply #13 on: February 24, 2005, 06:17:05 AM » |
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Hey Sup95Cobra
Those 42's are gonna be at 100% duty cycle before you get to "a detuned 550rwhp" unless you are using a FMU or some crazy high fuel pressure. I would strongly suggest at least 50's and possibly even 55's or 60's.
Shack
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Don@LRT
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« Reply #14 on: February 24, 2005, 07:26:54 AM » |
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Mize over at the Corral has a KB 2200, with a cam, heads, etc., and it's tuned really well - he puts down 450 RWHP with it 42's and he isn't running out of injector. If you figure a BSFC of 0.6, the 42s will support about 560 crank HP. Subtract 15% or so for DT losses and about 40 HP to drive the blower and you'll get about 440 RWHP. KBs, as you know are not great for generating peak HP numbers - but DO generate lots of power under the curve. I think you'll be fine with 42s. Don't waster your time on 50's - mainly because the 42's are rated to deliver at 39.5 fuel pressure, whereas the 50s are rated to deliver at 43.5 - which means if you use the 50's at 39.5 FP, Ford's standard, they really would be rated as 45# injectors - in other words, why bother. The 55's for some reason give tuners fits - the BEST step up from 42's are the SD 60's.
Don
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lwshack
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« Reply #15 on: February 24, 2005, 06:54:02 PM » |
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Yes Don 450rwhp is attainable with 42's but he said "550rwhp". I personally think he should look at something bigger (I would use 60's) before attempting to make that kind of power.
Shack
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Don@LRT
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« Reply #16 on: February 24, 2005, 10:17:31 PM » |
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Yep, I know he did, but what I eluded to was it is VERY doubtful that he can make that kind of power with a Kenne Bell on a 5.0 based motor. Mize has a pretty radical setup and he isn't near 550. Without an intercooler, 12-13# of boost is the practical limit of boost - water injection would help, but an intercooler is better IMHO. Kenne Bells on 5.0 based motors just do not put up the numbers other SCs do. That does not mean they are slow though. My old 302 Kenne Bell, I think, dynoed at 405 RWHP with a 2200 KB and Flowzilla, heads, cam etc., and water injection. Doesn't sound like a whole lot of power, but my 3700# convertible, with an automatic went a best of 11.1/123. That's what I mean about power under the curve. I had 42's BTW and they were fine. I'm a bigger fan iof track times than I am of dyno numbers.
Don
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lwshack
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« Reply #17 on: February 25, 2005, 05:54:16 AM » |
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I agree on the limits of the KB on a 302 based motor. I did not know exactly blower he had at the time of my first post. I was only reading his goals and passing on what I knew about injectors. Since you have since shed some light on the matter, I will agree with you that the 42's should be fine.
I apologize for posting before I knew all the specifics.
Shack
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95 Sleeper
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« Reply #18 on: March 13, 2005, 10:25:52 AM » |
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Hey Sup95Cobra
Those 42's are gonna be at 100% duty cycle before you get to "a detuned 550rwhp" unless you are using a FMU or some crazy high fuel pressure. I would strongly suggest at least 50's and possibly even 55's or 60's.
Shack
Right now with 417/433 on the stock motor the highest the duty cycle on these injectors was 15% |
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"Nitrous is like hot girl with with STD's.
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sinister88lx
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« Reply #19 on: March 14, 2005, 09:41:48 PM » |
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Put in the biggest ones you can afford.A set of 50's would leave you with some breathing room.Ford does have a 42lb injector if youre interested-its the lime green ones.Check e-bay,they seem to have good prices on them.Remember,it takes more fuel to make 450 supercharged hp than 450 na hp.
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Dan
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« Reply #20 on: March 19, 2005, 05:55:56 PM » |
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Put in the biggest ones you can afford.A set of 50's would leave you with some breathing room.Ford does have a 42lb injector if youre interested-its the lime green ones.Check e-bay,they seem to have good prices on them.Remember,it takes more fuel to make 450 supercharged hp than 450 na hp.
Aren't they in the Lightning too? The FMS 42#'ers? |
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95 Sleeper
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« Reply #21 on: March 20, 2005, 07:33:54 AM » |
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Put in the biggest ones you can afford.A set of 50's would leave you with some breathing room.Ford does have a 42lb injector if youre interested-its the lime green ones.Check e-bay,they seem to have good prices on them.Remember,it takes more fuel to make 450 supercharged hp than 450 na hp.
Aren't they in the Lightning too? The FMS 42#'ers? yep |
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"Nitrous is like hot girl with with STD's.
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