4-hole vs. 6-hole vs. 12-hole injectors - which is best??
#1
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4-hole vs. 6-hole vs. 12-hole injectors - which is best??
I have a 2000 XJ Sport with 178k on the clock. I’m always looking to upgrade my Cherokee and the most common upgrade I’ve seen is the injector swap. I’m kind of confused on which injectors to get. I’ve heard there’s 4-hole, 6-hole, and 12-hole injectors.
What’s the difference? Could someone help me out?
Thanks!
What’s the difference? Could someone help me out?
Thanks!
#2
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Year: '98
Engine: 4.0 I6
I have a 2000 XJ Sport with 178k on the clock. I’m always looking to upgrade my Cherokee and the most common upgrade I’ve seen is the injector swap. I’m kind of confused on which injectors to get. I’ve heard there’s 4-hole, 6-hole, and 12-hole injectors.
What’s the difference? Could someone help me out?
Thanks!
What’s the difference? Could someone help me out?
Thanks!
#3
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Year: 1998
Engine: 4.0L 162,000
Actually the 12 hole injectors have even better atomization than the 4 hole.
We have had great luck with them. Easier starting, smoother idle, better mileage and better low and mid range power. No downside.
You can't believe the difference until you try them.
For even better power and performance, add the bored 62mm throttle body.
I have some here if interested=
https://www.cherokeeforum.com/f72/bo...ectors-244427/
We have had great luck with them. Easier starting, smoother idle, better mileage and better low and mid range power. No downside.
You can't believe the difference until you try them.
For even better power and performance, add the bored 62mm throttle body.
I have some here if interested=
https://www.cherokeeforum.com/f72/bo...ectors-244427/
#4
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
I don't have a dog in this hunt, but the question intersted me, so I did a quick search on The Tube. Here's 1 vs. 4, and 4 vs. 12.
First, 1 vs. 4:
Next, 4 vs. 12:
Your mileage may vary, see dealer for details, void where prohibited.
Based on those two videos, it's clear the biggest difference is between 1 and 4. It's a BIG jump in performance. I have done that upgrade and the difference is very clear. But there is still a clear gain between 4 and 12.
The question is, will you see a huge difference in performance going from 4 to 12? I dunno one way or another.
So, if you have 4, maybe 12 would be worth the cost, maybe not. I'm not sure. But if you have 1, and assuming the costs are similar, I'd say the 12 is the way to go.
First, 1 vs. 4:
Next, 4 vs. 12:
Your mileage may vary, see dealer for details, void where prohibited.
Based on those two videos, it's clear the biggest difference is between 1 and 4. It's a BIG jump in performance. I have done that upgrade and the difference is very clear. But there is still a clear gain between 4 and 12.
The question is, will you see a huge difference in performance going from 4 to 12? I dunno one way or another.
So, if you have 4, maybe 12 would be worth the cost, maybe not. I'm not sure. But if you have 1, and assuming the costs are similar, I'd say the 12 is the way to go.
Last edited by BlueRidgeMark; 07-08-2018 at 06:37 PM.
#6
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
I'm going to agree here. I run two 90"s, which would use the Bosch 746 four hole or the crap stock one hole Simmons Deca or whatever they are called. (91 0n would use 4 hole 703's or something else).
Deal is, one of my 90's purrs like a kitten and runs very sweet with the 746's, but the other happens to have a SPANKING NEW SET of the "crap" one hole stock injectors a PO had bought (for a small fortune), and well...seems pretty sweet as well. I'm not disagreeing with Mark, when I changed my 23 year old stock to 4 hole I did notice a nice improvement.
Longer story shortened, for our 4.0's going beyond 4 holes would just be for fun, to experiment I'd think. I assume they are smaller holes the more you have, (not sure about that though). Smaller might clog more easily.
Last edited by DFlintstone; 08-20-2018 at 07:25 PM. Reason: "one"
#7
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Year: 1998
Engine: 4.0L 162,000
Even the YouTube video is impressive for the 12 hole spray and atomization.
Interesting how the 4 hole injectors allow for LEV (Low Emission Vehicle) and the 12 hole injectors allowed for SLEV (Super Low Emission Vehicle).
Last edited by CobraMarty; 07-08-2018 at 07:34 PM.
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JeeperScott (08-15-2021)
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#8
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
I think everybody agrees that the 12 hole is better than the 4. It's a question of bang for the buck. 1 to 4, or 1 to 12, yeah, there's a clear bang for the buck.
4 to 12? I don't think we're convinced of the return on investment.
I have a new (to me) 98 with a blown engine, and a rebuild is planned. I'll go 12 hole, no question.
But my wrecked 97 had 4s, and I doubt I would be convinced to spend the money to convert that to 12.
4 to 12? I don't think we're convinced of the return on investment.
I have a new (to me) 98 with a blown engine, and a rebuild is planned. I'll go 12 hole, no question.
But my wrecked 97 had 4s, and I doubt I would be convinced to spend the money to convert that to 12.
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joshastine (04-13-2021)
#11
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Year: 1998
Model: Cherokee (XJ)
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Great post/replies.
These are on my list, and was debating the 1 to 4 or 1 to 12. Seemed a clear choice to me, but that was without any factual knowledge on performance, just an assumption. Thanks for the input
These are on my list, and was debating the 1 to 4 or 1 to 12. Seemed a clear choice to me, but that was without any factual knowledge on performance, just an assumption. Thanks for the input
#12
I don't have a dog in this hunt, but the question intersted me, so I did a quick search on The Tube. Here's 1 vs. 4, and 4 vs. 12.
First, 1 vs. 4:
https://www.youtube.com/watch?v=bHf-6ohkgbA
Next, 4 vs. 12:
https://www.youtube.com/watch?v=eETvUK1ElNk
Your mileage may vary, see dealer for details, void where prohibited.
Based on those two videos, it's clear the biggest difference is between 1 and 4. It's a BIG jump in performance. I have done that upgrade and the difference is very clear. But there is still a clear gain between 4 and 12.
The question is, will you see a huge difference in performance going from 4 to 12? I dunno one way or another.
So, if you have 4, maybe 12 would be worth the cost, maybe not. I'm not sure. But if you have 1, and assuming the costs are similar, I'd say the 12 is the way to go.
First, 1 vs. 4:
https://www.youtube.com/watch?v=bHf-6ohkgbA
Next, 4 vs. 12:
https://www.youtube.com/watch?v=eETvUK1ElNk
Your mileage may vary, see dealer for details, void where prohibited.
Based on those two videos, it's clear the biggest difference is between 1 and 4. It's a BIG jump in performance. I have done that upgrade and the difference is very clear. But there is still a clear gain between 4 and 12.
The question is, will you see a huge difference in performance going from 4 to 12? I dunno one way or another.
So, if you have 4, maybe 12 would be worth the cost, maybe not. I'm not sure. But if you have 1, and assuming the costs are similar, I'd say the 12 is the way to go.
#13
Actually the 12 hole injectors have even better atomization than the 4 hole.
We have had great luck with them. Easier starting, smoother idle, better mileage and better low and mid range power. No downside.
You can't believe the difference until you try them.
For even better power and performance, add the bored 62mm throttle body.
I have some here if interested=
https://www.cherokeeforum.com/f72/bo...ectors-244427/
We have had great luck with them. Easier starting, smoother idle, better mileage and better low and mid range power. No downside.
You can't believe the difference until you try them.
For even better power and performance, add the bored 62mm throttle body.
I have some here if interested=
https://www.cherokeeforum.com/f72/bo...ectors-244427/
#15
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BlueRidgeMark (05-29-2020)