2007 5.7 based 399c.i. stroker build - Page 2 - Hemi Truck Club
 
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Old 05-12-2020, 02:13 PM   #11
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Received my Molnar crank, rods, and King bearings today. Pics later.

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Old 05-12-2020, 02:15 PM   #12
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Originally Posted by charged392 View Post
The stock injectors will not flow enough for a stroker motor. You will need to step them up
What would be an acceptable replacement? 6.4L injectors? Is there a preferred brand, or will OEM do? The budget is already blown on this - might as well get what I need. I will be using an Eagle truck intake, so they will need to fit under the stock rails. I have been looking for replacements - everything is rated in lbs. I have never even researched aftermarket injectors or capacities. I am completely in uncharted waters on this one. Any info would be greatly appreciated.
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Old 05-13-2020, 02:24 AM   #13
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Have you asked your cmr tuner the preferred injector size for your engine build and tune?
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Old 05-13-2020, 06:33 AM   #14
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Have you asked your cmr tuner the preferred injector size for your engine build and tune?
Turns out Inertia Motorsports is hard to get ahold of via email. I guess Iíll continue trying to get an answer out of them instead of asking for advice here. Thanks!
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Old 05-13-2020, 09:49 AM   #15
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Are you using one of Stu's cams? A rv cam will give you the bottom-end tq for your heavy 4x4. SRT4 stage I or II (52lbs/hr or 65lbs/hr) injectors will work great for your build.
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Old 05-13-2020, 12:42 PM   #16
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Trying to remember what I used, believe it was SRT4 stage 2 injectors. Seemed it was around 55lbs. As I posted before a set of SRT 392 take off should work fine and save you a little money.
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Old 05-14-2020, 05:00 PM   #17
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your Best intake option for what you are trying to do is going to be the 6.4 Truck intake see if you can get one with Rails and injectors Contact MMX 6.4L HEMI Intake Manifold for 5.7L RAM Upgrade Kit by MMX it's the Best bang for the buck , stay away from the Sniper intake , it's not going to help you at all, don't get me wrong, I've seen some great Power #s out of it, but it's intent is for those guys who Ring the crap out of these engines, the Sniper LOVES RPMs....not good for a truck with 35s....word of caution on those King bearings, their Quality Control has taken a Big stinking pile of (fill in your own 4 letter word for feces) in the last few months, Check and Check and Check again , I 've sent 3 sets back in the last month., the last set all uppers were 6.4 Hemi bearings, two of the lowers were Chevy LS bottoms(the LS is a narrower shell) the worst set was for a GM SB2 build....What a PHUCKING fiasco, as for the Molnar stuff A+
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Old 05-22-2020, 08:01 AM   #18
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Have you asked your cmr tuner the preferred injector size for your engine build and tune?
Finally got ahold of Stu - his mother died in Colorado last week. Caught him on his way out the door. He sent me 6.1L SRT8 stock used injectors. Do I need to do anything to check these out or clean them out before installing?
Also, Stu says everyone thinks using an RPM window witch to control the eagle truck intake dynamic runners works - it doesn't. He says it is PWM modulated, and changing voltage won't work. You have to have a digital signal going to the solenoid to make it work. Until someone builds a PWM board, it's wasted money.
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Old 05-22-2020, 09:50 AM   #19
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A few aftermarket tuners have PWM outputs. It would surprise me if a rpm window switch wasn't available with a PWM out put .
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Old 05-23-2020, 10:16 AM   #20
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Quote:
Originally Posted by RecoilFreak View Post
Finally got ahold of Stu - his mother died in Colorado last week. Caught him on his way out the door. He sent me 6.1L SRT8 stock used injectors. Do I need to do anything to check these out or clean them out before installing?
Also, Stu says everyone thinks using an RPM window witch to control the eagle truck intake dynamic runners works - it doesn't. He says it is PWM modulated, and changing voltage won't work. You have to have a digital signal going to the solenoid to make it work. Until someone builds a PWM board, it's wasted money.

Clean the injectors.......and EVERY DYNO TEST I'VE DONE or have Been involved with the 5.7 Truck intake and A WINDOW switch has shown it to work, along with about 30 testimonials.
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