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Old 01-02-2014, 04:48 AM   #1
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Intake manifold

What's your opinion on the cobra jet Intake manifold vs. boss 302 intake manifold on the 5.0?
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Old 01-02-2014, 04:59 AM   #2
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You will need to ask this question on a different site as I'm sure no one here has done the testing.
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Old 01-02-2014, 05:44 AM   #3
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Well, I see it costs more and you have to use the gt500 throttle body. I would much rather have the torque down low as compared to top end horsepower. I want to go fast quick, no need to hit 170mph. For me, it would be stupid to buy either as I would just be taking away from the low end that I want. If top speed is what you want, then I guess it would work better than stock. I really like the look of the boss intake but don't want to lose any low end.
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Old 01-02-2014, 07:19 AM   #4
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For me, it would be stupid to buy either as I would just be taking away from the low end that I want. If top speed is what you want, then I guess it would work better than stock. I really like the look of the boss intake but don't want to lose any low end.
It all depends on your gearing. If you are running 3:73's the Boss is a great intake. You don't lose that much torque on the low end that you will even notice. You still have to feather the clutch on launches to keep the rear end from breaking loose. The "get up and go" factor is DEFINITELY noticed though. I read so much about the Boss Intake debate prior to installing it, I was confused and worried. The Boss Intake is a great power adder if you want your car to haul *** and I am glad we went this route. If you want enough torque to do a tractor pull, or are just a dyno queen, that all you care about are numbers on the torque graph, maybe not. We added a 90mm throttle body during the install as well. With 3:73's you will have all the torque you want and will still have to work on your suspension to get that torque to the ground effectively. Don't have the any experience with the Cobra Jet, but that IM seems to be more of a 1/4mi specific TB. After 5500rpms, the Boss IM craps on the stock IM. You DEFINITELY feel this driving. You will hear all the crap about you have to run the Boss to 7500 before you get the gains, BS. Right after the install, you will laugh about peeps making those accusations. It takes off after 5500 and you feel it.

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Old 01-02-2014, 08:51 AM   #5
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The CJ is more expensive to install, as you will need a GT500 TB, I personally would take that IM over the Boss IM, I don't like the look of the Boss IM that much, and the CJ will have better gains, and minimal to no torque loss over the Boss IM, only thing is that the Boss IM will take Strut bars, the CJ won't, maybe a 2010 GT500 SB, but probably not.
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Old 01-02-2014, 09:18 AM   #6
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The CJ is more expensive to install, as you will need a GT500 TB, I personally would take that IM over the Boss IM, I don't like the look of the Boss IM that much, and the CJ will have better gains, and minimal to no torque loss over the Boss IM, only thing is that the Boss IM will take Strut bars, the CJ won't, maybe a 2010 GT500 SB, but probably not.
So by your thinking, you would pay OVER a grand more to get gains of +7hp top end and +5torque!
REAL NUMBERS HERE.......

You would also need to forge your internals to effectively run the Cobra Jet. If you think spinning your Coyote at 7500 is a stretch, do it at over 8k.
Tons of people run the Boss IM, how many do the same with the CJ..............There IS a reason
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Old 01-02-2014, 09:47 AM   #7
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Originally Posted by mustangz View Post
The CJ is more expensive to install, as you will need a GT500 TB, I personally would take that IM over the Boss IM, I don't like the look of the Boss IM that much, and the CJ will have better gains, and minimal to no torque loss over the Boss IM, only thing is that the Boss IM will take Strut bars, the CJ won't, maybe a 2010 GT500 SB, but probably not.

Another quality "tech" post without any expertise...

Love it!

Soccerlover4. Any thoughts?
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Old 01-02-2014, 10:59 AM   #8
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Intake manifold

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Originally Posted by Deerslayer View Post
So by your thinking, you would pay OVER a grand more to get gains of +7hp top end and +5torque!
REAL NUMBERS HERE.......

You would also need to forge your internals to effectively run the Cobra Jet. If you think spinning your Coyote at 7500 is a stretch, do it at over 8k.
Tons of people run the Boss IM, how many do the same with the CJ..............There IS a reason

I never said that I would do it, I just said that it would be the one that I'd go with.
I also said that the CJ has better gains, I never said how much, although Ford Racing claims a 25HP increase over the Boss IM. People don't go with the CJ often because of the cost. Also, Is the dyno on the same day? Is the CJ IM tuned? FR states that for the best performance out of the CJ if it's tuned.
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Old 01-02-2014, 12:15 PM   #9
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I am pretty sure you would have to tune with either. I don't think they would do a dyno on an intake swap if it wasn't tuned.
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Old 01-02-2014, 12:28 PM   #10
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Originally Posted by Green5.0 View Post
I am pretty sure you would have to tune with either. I don't think they would do a dyno on an intake swap if it wasn't tuned.

That is true, and if that dyno was on the same day with roughly the same temp, etc. that's a bit surprising to me.
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Old 01-02-2014, 01:16 PM   #11
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You guys keep talking about tongue loss on the CJ, but they are stating there is no torque loss only gains from the manifold. Also the strut bar yes you can get one for the cobra jet manifold on a gt. Has anyone on this site actually put the or uses the CJ? As well as the price is going down on the CJ just a matter of time before people just start to use it and try it out the boss 302 manifold was out first so that's why everyone is already using it and it's cheaper and people just aren't big spenders... What you pay for is what you get.
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Old 01-02-2014, 01:25 PM   #12
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Originally Posted by PISTONS8904 View Post
You guys keep talking about tongue loss on the CJ, but they are stating there is no torque loss only gains from the manifold. Also the strut bar yes you can get one for the cobra jet manifold on a gt. Has anyone on this site actually put the or uses the CJ? As well as the price is going down on the CJ just a matter of time before people just start to use it and try it out the boss 302 manifold was out first so that's why everyone is already using it and it's cheaper and people just aren't big spenders... What you pay for is what you get.

The CJ IM is newer, but once the price goes down, which it will, people will be buying them. FR has stated no torque loss over the Boss IM, and POSSIBLE gains of 25 HP from the CJ over the boss IM. I don't know why I keep stating this, as some people here attack everything I say in attempt to have me banned for some reason.
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Old 01-02-2014, 03:32 PM   #13
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Originally Posted by Deerslayer View Post
So by your thinking, you would pay OVER a grand more to get gains of +7hp top end and +5torque!
REAL NUMBERS HERE.......

You would also need to forge your internals to effectively run the Cobra Jet. If you think spinning your Coyote at 7500 is a stretch, do it at over 8k.
Tons of people run the Boss IM, how many do the same with the CJ..............There IS a reason
Dyno numbers are meaning less if you ask me. Got any actual track numbers?

And you do not need to forge your motor to run the Cobra Jet intake. There are 6 people no less I know of from other forums doing it without forged motors.
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