CJ Intake on non-boss - Mustang Evolution

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Old 04-20-2015, 12:50 PM   #1
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Question CJ Intake on non-boss

I've been looking at many different threads and many different forums trying to decide if it is worth it to put the cj manifold, monoblade throttle body, and 5" intake on a 5.0. Money isn't the factor I care about, rather just the gains. I have seen some claim it is not worth it and others swear by it. What is the consensus here? Actual numbers would be appreciated.
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Old 04-20-2015, 12:51 PM   #2
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Not worth it unless you run different cams.
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Old 04-20-2015, 02:28 PM   #3
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Famine, I'm in the same boat. Almost ready to hit the button. What is the max effort boss option; Boss IM, Accufab 84.5, and a Airaid Boss intake? I still think the CJ with SCJ throttebody will make more hp/tq above 5k than boss. Here we go again... LOL
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Old 04-20-2015, 03:45 PM   #4
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By the time you spend all that money on cobrajet parts, why not just go with a supercharger ?

That's my thought process at least. I'm going to hold off on all the "smaller" bolt-ons, and when I'm ready plunk down $6k+- and do it right.
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Old 04-20-2015, 04:30 PM   #5
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Because 1600 is < than 6000 by a fair amount. I'm not wanting to make 500 plus wheel hp. The gains from stock IM are pretty proven and reliable.
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Old 04-20-2015, 08:04 PM   #6
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I spent 8k on my last blower setup. I feel that 1600 is better than that much. I would like the light weight aspect of that setup too. Plus, I have a kid that will be born within the week and with a blower I will have more of that lingering feeling of uncertainty of "when will the block say I quit?" Down the road I could always go that route but for now I was hoping the cj would get me maybe 20 more than oem with only minute losses in torque.
Something I'm wondering also is whether the 2015 heads are compatible with our block and how much there would be to gain there as well. I feel with different gears and 450whp, I would be satisfied. I'm still up in the air though.
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Old 04-20-2015, 08:09 PM   #7
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Originally Posted by c_rizzle View Post
By the time you spend all that money on cobrajet parts, why not just go with a supercharger ?

That's my thought process at least. I'm going to hold off on all the "smaller" bolt-ons, and when I'm ready plunk down $6k+- and do it right.
Bc nothing is more fun then dragging a blown 5.0 down the road in your NA nx coyote

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Old 04-20-2015, 08:16 PM   #8
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Originally Posted by zinc03svt View Post
Famine, I'm in the same boat. Almost ready to hit the button. What is the max effort boss option; Boss IM, Accufab 84.5, and a Airaid Boss intake? I still think the CJ with SCJ throttebody will make more hp/tq above 5k than boss. Here we go again... LOL
10-15hp over the boss.
I have seen 10 on more than one occasion personally.

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Old 04-20-2015, 08:19 PM   #9
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Raptor, what on average has the torque loss been compared to oem and where in the powerband? I ask since you stated you have seen a few.
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Old 04-20-2015, 08:26 PM   #10
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Bc nothing is more fun then dragging a blown 5.0 down the road in your NA nx coyote

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I would've went nitrous rap but the closest place in this state, is hours.Access to fill a nitrous bottle would be a pita for me lol.


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Old 04-20-2015, 08:28 PM   #11
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I would've went nitrous rap but the closest place in this state, is hours.Access to fill a nitrous bottle would be a pita for me lol.


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It can definitely be a pain in the ***.
You went with the right setup for you man. Clean and simple and good for up to 800hp

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Old 04-20-2015, 08:34 PM   #12
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Raptor, what on average has the torque loss been compared to oem and where in the powerband? I ask since you stated you have seen a few.
Around 8ft lbs peak with the cobra jet. And you will lose it to about 3500 rpms. From the ones I have seen.
Can't remember the exact #it looses throughout the curve down low, as I do not have the dyno sheets in front of me. But it is noticeable.

With the boss I lost around 14 ft lbs.

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Old 04-20-2015, 08:43 PM   #13
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Around 8ft lbs peak with the cobra jet. And you will lose it to about 3500 rpms. From the ones I have seen.
Can't remember the exact #it looses throughout the curve down low, as I do not have the dyno sheets in front of me. But it is noticeable.

With the boss I lost around 14 ft lbs.

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So you're still with the boss now? Must be worth it then?
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Old 04-20-2015, 08:51 PM   #14
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If you already have a Boss it's not worth it the cost to upgrade. But, Famine you are like me on stock IM. If money is not really the consideration (to a point) why not the Cobra Jet?
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Old 04-20-2015, 08:56 PM   #15
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So you're still with the boss now? Must be worth it then?
Yes I'm not a 100% sure if I will swap to the cobra jet.

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Old 04-20-2015, 08:56 PM   #16
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It can definitely be a pain in the ***.
You went with the right setup for you man. Clean and simple and good for up to 800hp

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If I ever get the balls to go that high haha. I'd definitely have to build this thing. I'd also get the stiegemeir upgrade when going for that much power, myself.


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Old 04-21-2015, 05:54 AM   #17
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Cobra jet only sees true gains past 7K RPM which is harmful to your engine if it's not ready for it


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Old 04-21-2015, 10:42 PM   #18
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Cobra jet only sees true gains past 7K RPM which is harmful to your engine if it's not ready for it


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The concensus has been 7500-7600 is safe on a stock motor.

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Old 04-22-2015, 06:31 AM   #19
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A CJ intake will out power the stock IM big time over 5000 rpms at both peak and under the curve.
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Old 04-22-2015, 01:58 PM   #20
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I had a cobrajet, and theres a lot of misinformation and heresay here.

I had an M6 with 3.31 gears with CJ, monoblade, 5" intake, kooks 1 7/8" shortys and lethal catless H-pipe. Not the "best" setup for horsepower obviously, but its what i wanted.
Car made 381 whp / 360 wtq stock - 450 whp / 352 wtq with above mods.
I also got sideways my first time at the track on 275 nitto invos, so i was always a little nervous at the track. My best time ever, ***** footing the 1-2 shift, was a 12.2 @ 118. With street tires, 3.31, and a noob driver, this should obviously not be taken as what the set up is "truly" capable of, but i still think that trap speed is pretty solid nonetheless.


1. You will notice some torque loss down low daily driving, especially with the 3.31 gears. That being said, the CJ has no problem getting up and going, its not like big turbo lag, its just noticeable some "grunt" is no longer there. However, the extended powerband is awesome.. nothing quite as nice as being able to comfortably take off from 50 in second.

2. There are gains well before 7K, if i remember correctly, it was as soon as 4500 rpms in my case. CJ and headers went on at the same time though, so i am willing to attribute some of the gains to each.

3. Ran the car up to 8k a few times on the dyno, a few times datalogging, but for the most part it was a 7500 rpm shift, and that was enough to beat a few fully bolted bosses (barely, maybe 1/2 to 1 car) and some bolt on 5.0s (comfortably walked). Now, my OPGs may very well have been knocking on deaths door, but while i had that set up everything was fine for about 8 months.

4. For the sake of full disclosure, the only reason i sold the CJ was because i switched from drag racing to road racing, and the CJ didn't serve as much purpose there, i figured the money would be better spent on a spare set of rims and tires for the track. All in all, i would do it again, and would recommend it for a solid all motor build.
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Old 04-22-2015, 03:23 PM   #21
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Voltwings, 450 whp is pretty good to me. That 118 mph trap is not to shabby either.
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