It gets confusing. Early and late tj's run considerably different pressures.
To make it even funner, when buying injectors online they rate them at yet another pressure
Dyno Testing Bolt-ons On The 4.0
- Thread starter Jezza
- Start date
It gets confusing. Early and late tj's run considerably different pressures.
To make it even funner, when buying injectors online they rate them at yet another pressure
I went back and looked - it's been a few years. I run Deatschwerks 42 pound injectors in the 392.
It does get confusing. And yes early TJ's required lower pressures. If I remember correctly 42 PSI was what early pumps were set @ and newer ones are 58 PSI. It's partly why swapping in a Hemi requires the 05-06 fuel pump. The older pumps worked on the Magnum engine.
Wow that's a jump from stock.
Stock size for my LS3
Funny how these dodge guys always gotta do a ton of work to reach stock Chevy hp levels
my stroker in the YJ was running 27 lb mustang injectors, its lean most of the time... so maybe someday when I get the LJ squared away, I can go back to the YJ and get it road worthy.
OBD 1 vs OBD 2 from what I can tell, YJ was also different, I think yjs are a close to the OBD1, but not exactly the same PCM. @Wranglerfix might know about the details more
2009+ 6.4 Hemi has better head flow and makes more power than an LS3. The LS3 is rated 30-40 hp lower than the 6.4 hemi.
Stock size for my LS3
@NashvilleTJ, I think someone is jealous...
Funny how these dodge guys always gotta do a ton of work to reach stock Chevy hp levels
Notice how the Chevy guys got to try and pound on their chests about how get they are? While us Hemi guys just Keep On Truckin?
And are you sure about those numbers? Don't want to derail Jezza thread here,,,
They'll come up with some reason why it's not the same...
I'd always thought the same thing. I can remember getting some 24lb/hr injectors for my 4 cyl when I'd done the larger TB & was going to try forced induction on it. I've still got a set of Ford injectors too.
Depends on which LS3 you're looking at. I see that Hemi (2016 model crate) at 485 HP, that's lower than my LS3 is rated and they offer higher ratings than what I bought. Hemi head numbers tend to be better though.
You also must realize I was just poking Rick to rile him up a bit.
I have a 2” wc gauge, if someone wants to test, I am willing to get another one and let them try. I am too busy to be able to get it done.
A little early this week due to the holiday and such. Sorry in advance it's another medium long one. Testing two mods in one video adds too much time. I think in the future I am going to modify my dyno schedule to only include 1 mod per session. I am learning more here than just the Jeep bolt on results. Video editing, storytelling and the like might as well be a foreign language to me.
Great video!
Question on editing...and I need folks to help me with my editing because I'm just as guilty. Is this a video on changing injectors or dyno testing...I'd suggest less footage of changing the injectors...couple of quick clips to keep things moving. Maybe less elbow.
After you changed the injectors you walked around a little...I think you were cycling the key priming the pump...but that can be cut out.
I struggle with making shorter videos.
Question: you're testing the 4 hole injectors but the stock ones are arguably 250k plus originals? For an apples to apples comparison shouldn't you replace filters and flow test the originals?
You talked about wiggling the connector which is great audio...but the video was just the laptop...that would have been a good time to cut to B roll shot of you fixing the issue...time lapse...a squirt of cleaning agent...not the static laptop image.
Also consider running two cameras...your laptop shot and a wider image of you talking. Screen recording might help too...sync all three in editing software and cut to the appropriate image using a single camera as your audio source, muting the other tracks.
I buy used GoPro 7s and 8s...they use the same batteries...can usually be had for $100 ea. $15 tripod and batteries are cheap. Perfect b roll rig.
Throttle body spacer would possibly be more interesting switching to stock intake. A simple b roll cut to you holding the spacer next to the throttle body and cutting back to you tossing the spacer into the foot well would be better.
Cut out the second "we're doing our zero to sixty" and just cut straight to the countdown.
Same with removing throttle body spacer. You mentioned the removal 3-4 times. Once is enough. Add b-roll of the removal...3-4 seconds...then countdown.
Look up vocalized pauses...so...and... you're really good about no uhhs...try and be a little more conscious of vocalized pauses when talking.
Interesting conclusion on the injectors.
Your outro...two cameras switching views would help. Video clips supporting your conclusion...screen shots with pointing fingers, pictures or videos of the rockers, or something breaking up and supporting your dialog.
Hope my notes are helpful and no offense meant.
I need to use that vibration meter on my 4.0. Mine's pretty terrible.
Can't wait for more!
-Mac
Question on editing...and I need folks to help me with my editing because I'm just as guilty. Is this a video on changing injectors or dyno testing...I'd suggest less footage of changing the injectors...couple of quick clips to keep things moving. Maybe less elbow.
After you changed the injectors you walked around a little...I think you were cycling the key priming the pump...but that can be cut out.
I struggle with making shorter videos.
Question: you're testing the 4 hole injectors but the stock ones are arguably 250k plus originals? For an apples to apples comparison shouldn't you replace filters and flow test the originals?
You talked about wiggling the connector which is great audio...but the video was just the laptop...that would have been a good time to cut to B roll shot of you fixing the issue...time lapse...a squirt of cleaning agent...not the static laptop image.
Also consider running two cameras...your laptop shot and a wider image of you talking. Screen recording might help too...sync all three in editing software and cut to the appropriate image using a single camera as your audio source, muting the other tracks.
I buy used GoPro 7s and 8s...they use the same batteries...can usually be had for $100 ea. $15 tripod and batteries are cheap. Perfect b roll rig.
Throttle body spacer would possibly be more interesting switching to stock intake. A simple b roll cut to you holding the spacer next to the throttle body and cutting back to you tossing the spacer into the foot well would be better.
Cut out the second "we're doing our zero to sixty" and just cut straight to the countdown.
Same with removing throttle body spacer. You mentioned the removal 3-4 times. Once is enough. Add b-roll of the removal...3-4 seconds...then countdown.
Look up vocalized pauses...so...and... you're really good about no uhhs...try and be a little more conscious of vocalized pauses when talking.
Interesting conclusion on the injectors.
Your outro...two cameras switching views would help. Video clips supporting your conclusion...screen shots with pointing fingers, pictures or videos of the rockers, or something breaking up and supporting your dialog.
Hope my notes are helpful and no offense meant.
I need to use that vibration meter on my 4.0. Mine's pretty terrible.
Can't wait for more!
-Mac
Curiosity question, have you driven this on street between mods? Hopefully not Drivability impressions might be a good close to the series . Kudos to making these weekly updates, enjoy these.
Ps. With all the flow/psi talkis there a better drop in multi hole injector (4 or 12) that’s is the right flow. Obviously looking forward to the next installment of tuning. Don’t have a clear picture on how that is done with an OEM computer. Helped revive a GTI running on a mega squirt- leaning on the already loaded tune and the Tuner Studios software. Set some ratios/rpm limits and let auto smooth the tables. So minimal. Thinking with t the lower AIT and the altered AFR range there is HP to be had across the rpm range.
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I have an episode planned for fans. One pull will be with no fan installed. Probably as close to e fan as I'm going to get.
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