Thanks! Just bought a set of 12 ports from you for my ‘01 XJ, installing them soon.

got some 4 hole K's from Yall in October. what a great way to fall back in love with your junk.. 👍👍🍻 geat product 285k 16.5mpg 35s welded 410 gear

Thank you for telling me exactly what I was looking for ! No bullshit just facts!

That’s pretty good. Parasitic loss through the T case and front driveshaft spinning is 25%. That means that 240k engine is still putting out close to 190hp.

I grew up on a farm on the corner of Middleton and Linden and now live in AZ. Just starting rebuilding my 94 Jeep 4.0. I have a long way to go but it has been good fun. Wanting to do a stroker and lift kit soon.

I did the 4 hole. Before the installation the engine had a little more vibration. The 4 hole installed smooth it out.

Dont see many dyno sheets that are below 5252 rpm haha, nice job!

for my TJ the engine has BBK 62 mm throttle body, K's viper coil mod, K's 12 port Fuel injectors, and a custom cowl cold air intake, on the dyno with 35 in tires and 410 gears i got 200 HP and 200 FT Lbs tor. Thanks K Suspension!!!

You guys are awesome, the greatest vendor ever😉

I'm curious to see how much of an increase in power will be netted combining these with other bolt ons. I have the 12 ports combined with a BBK 62mm TB, banks manifold and banks cat back exhaust with a "custom" catalytic converter.... Hmmm

Dude i live in the boise area and have an XJ with 231k miles on it. Thanks for the video!

I'm probably 6 hours south of you ( depending on what I'm driving) I'm really impressed and surprised at the actual results. I have a ton of family in Rexburg. You have gone from fanatic to entrepreneur. You make things look easy. If you can come up with something that's easier than "painless wiring" for a RENIX system....I have 2. I'll buy 4

Finally some science not just owner guess work.

Outstanding Job Guys, I found you all a couple of days ago looking for a how-to-video to change out my Injectors... I have a 93 jeep ZJ 4.0 automatic, and I want to put in the 4-hole injectors.. From watching the videos I Know I can do this.. Iv'e change out pretty much everything , but of cource so much still to do ... I Love my little Jeep , so fun to drive & I want to do some long road haul's in it to see the country & just kick back... Anyway , I need to order my Injectors from you-all ... I did Subscribe & I'm so glad I found you folks... Danny .

Not a bad little bump for the price....

Great video

Hey another great video! 👍🏻 Haven't been well enough to install your 12 hole yet (or your wife... LMAO over my own typo letting it stand.. ha WIRE upgrade), but looks like worth the time. 🤙🏻 PS: Still waiting to add your pending front and rear winch wiring to my build backlog bucket list.

You ROCK, Raffi!!!

Thanks bro! Can’t wait for my cyclone set up ;)

Great job bud. Thank you.

I am very interested in the 12 hole injectors and as other people have commented about resetting the ECU between test and lower RPM for the street driving fuel economy would be interesting.(mine is a Wj 4.7L). And any proof of better atomisation.

In my experience in normal driving it has plenty of acceleration! It’s definitely no good for racing but the acceleration is not bad!

i been seeing some crap said about your injectors. glad to see this. now many times bolt on junk nets 0 or a loss of HP. granted an easy 5 hp and more torque is always good, and your 30 year old injectors will make it run not so great. so all in all, i say these injectors are a good idea to upgrade with. now, what about for my Renix? :)

Good stuff. I have the 12 holes and your Viper Mod kit. But while you were at the dyno, why didn't you test all the other "power upgrades" e.g. spacer, hot coil/spark plug gapping, performance plug-ins etc.

I want to see you do a tri Y header evaluation. Test on the dyno the difference in stock manifold versus tri Y header. Also my Jeep is a 98’ and has the original intake manifold and I’m really interested in knowing if the later model big plenum intake would make more power and torque.

cool video. I didnt expect to see the 4 port have a higher torque number. It looked like it stayed about 10fp above the 12 hole most of the run. I mean i'll hand you 4 or 5 hp for 10 fp of torque. not that you could notice any of it much really. I understand the 12 hole does better on fuel economy if the internet is to be believed. I wander how much a new set of stock injectors would change the whole thing? I guess its all marginal gains but I get the cold air ignition coil programmer injector and exhaust upgrade. Past that v8 swap I guess.

Hey man I'm out in Nampa as well! I have a 96 xj I've been working on

Between each run did you do a learn mode reset ? The only way to see real gains is to do a ecm reset then after about 50 cold start the ecm learns the new injectors and adjust accordingly through those 50 cold starts only then can this graphing show true curves.

Was the cold air intake test done with stock injectors

Wow!

Interesting data but its very subjective. Just came from a video where someone claimed according to this video, “12 hole are better for high end torque while 4 hole are better for low end torque” These claims are from people trying to learn about their modifications but don’t have the base knowledge to take away the right information from a test like this. They just see graphs and data and take what they will based off of what they know. For any body else reading pleasing take these results with a grain of salt. There is many factors that go into dyno results. There is even different dynos that show different results and can even be manipulated. If you wanted to find the real difference in these injectors this needs to be a lot more in depth and science based. Im not trying to hate on anyone, just don’t like hearing misinformation spread by people who don’t exactly know what they’re talking about from a video they see that does limited testing. Besides that this was a good video on what your personal injector results were, love to see how 4.0s do on a dyno👍

Hey Raffi I just changed my injectors in my 1998 ZJ 4.0 and I'm still getting getting a hesitation in the test drive its much better than before but can you give me some information on what I may need to replace. Eric

Where did you get your 4 hole injectors from are they Bosch how much do they cost where do I buy them thank you

jsut changing the inyector nothign else? ECU can tune itself just with sensors information? ,if thats the case the 4 port looks better

Proof is in the pudding 🍮 😋

It would have been more interesting to compare New OEM stock injectors with New 4 ports injectors, when comparing old and used injectors to new injector, it is always without surprise, new injectors always give better results

What does it cost to get a dino anyway

Question Guys, i used the ford 4ports on my 2001 WJ GC 4.0 and just curious if you think any modification to that airbox design could give more power and torque or is that factory setup already pretty optimized for stock engine hardware and just a free flowing exhaust. Pre cats deleted and main cat replaced with high flow and a glass pack resonator only.

can u guys recommend what kind of 4 hole is the best for performance with good price ? for jeep 4.0 YJ

I installed the 12 hole injectors. But now I have still hard rumble coming from the engine at idle and when driving it struggles. Is there anything I can do too make this change?

What pound were the injectors between the 3

You have should have pulled your fuel trims out of the computer and run the dyno with a wide band. The ecu needs some time to reset the tables. If you run it at WOT it defaults to the last known tables, which the ecu would have developed for the factory injectors. I’m willing to bet a significant amount of money it was running extremely rich at the top end

12 port? where? and do they work in a 98 XJ?

Which 4 port injectors did you use?

So much potential with these 4.0 and yet no one has modified the fuck out of these 4.0's put a ported head with bigger pistons and a 4.2 crankshaft and custom headers and intake and you're talking about 400 to the wheel and modified trans talking low 14 or high 13's

Uhm.. HP 147??? Me jeep XJ Stock 1992 4.0L 6l - 193 HP and 224 Torque.. Uhmmm...