Boss or Cobra Jet manifold.
03-24-2013, 03:07 PM
#13
Defo what everyone said. The CJ manifold is for very high RPM performance, more like track use only and not for street.
Very short runners, even shorter than the Boss302 manifold, it will sacrifice low RPM running.
Matching your cams, exhaust, etc. will be a task.
Additionally, you have to consider the the build of the engine itself. The Cobra Jet (the drag race car, not just the manifold) and the Super Cobra Jet are purpose built drag racing cars with no form of emissions, etc. And even if they had emissions controls, they still are not street legal.
Being that the CJ & SCJ are purpose build drag racers, they have completely built short blocks. Forget the stock hypereutectic pistons and forget the stock sintered conrods in your 5.0. They would not be strong enough to live reliably long in an engine turning the RPMs to benefit from a CJ manifold.
Heck, the Boss 302 even dumps the hypereutectic pistons for forged Mahle pistons and replaces the factory sintered rods for even better sintered rods that use superior powdered metals. And the Boss is meant to run to 7500 RPM, where the Ford engineers have described the combustion pressures "to be approaching diesel-like pressures." (I'm not certain of going to 7500RPM will put diesel pressures into the engine, but I can't rule it out since I wasn't the one designing the engine.)
Very short runners, even shorter than the Boss302 manifold, it will sacrifice low RPM running.
Matching your cams, exhaust, etc. will be a task.
Additionally, you have to consider the the build of the engine itself. The Cobra Jet (the drag race car, not just the manifold) and the Super Cobra Jet are purpose built drag racing cars with no form of emissions, etc. And even if they had emissions controls, they still are not street legal.
Being that the CJ & SCJ are purpose build drag racers, they have completely built short blocks. Forget the stock hypereutectic pistons and forget the stock sintered conrods in your 5.0. They would not be strong enough to live reliably long in an engine turning the RPMs to benefit from a CJ manifold.
Heck, the Boss 302 even dumps the hypereutectic pistons for forged Mahle pistons and replaces the factory sintered rods for even better sintered rods that use superior powdered metals. And the Boss is meant to run to 7500 RPM, where the Ford engineers have described the combustion pressures "to be approaching diesel-like pressures." (I'm not certain of going to 7500RPM will put diesel pressures into the engine, but I can't rule it out since I wasn't the one designing the engine.)
06-01-2013, 06:41 AM
#14
Join Date: Jun 2013
Location: TN
Posts: 1
Actually the CJ starts to make more HP right from 3100rpm and continues all the way to 7800rpm which has a peak of 30hp more than the Boss. The CJ starts to make more TQ all the way down at 3250 and keeps growing the gap all the way tell redline. This intake manifold was on a 2012 Boss and just had exhaust bolton’s. I believe this intake will benefit anyone even with bolton’s and you do not need a forged motor as people seem to think.
06-25-2013, 11:58 PM
#15
6th Gear Member
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
OP,
The CJ intake manifold is not the right manifold for your setup. This intake only compliments the most extreme builds and does not work well with bolt-on 5.0's.
I would definitely go with the Boss 302 manifold instead. You'll see some nice gains with a Bama custom tune, but it will really wake your 5.0 up with a CAI, TB, and O/R mid-pipe!
Let me know if you have any other questions!
Shane
The CJ intake manifold is not the right manifold for your setup. This intake only compliments the most extreme builds and does not work well with bolt-on 5.0's.
I would definitely go with the Boss 302 manifold instead. You'll see some nice gains with a Bama custom tune, but it will really wake your 5.0 up with a CAI, TB, and O/R mid-pipe!
Let me know if you have any other questions!
Shane
can the springs handle 7500 rpm shifts??
I bent the heck out of a push rod not too long ago on my OHV 5.7 revving just to 6200 rpm
07-07-2013, 06:13 PM
#16
Actually the CJ starts to make more HP right from 3100rpm and continues all the way to 7800rpm which has a peak of 30hp more than the Boss. The CJ starts to make more TQ all the way down at 3250 and keeps growing the gap all the way tell redline. This intake manifold was on a 2012 Boss and just had exhaust bolton’s. I believe this intake will benefit anyone even with bolton’s and you do not need a forged motor as people seem to think.
If anything, most would make the mistake of just slapping on the CJ manifold and try to retune but completely forget to upgrade everything else to reproduce your own gains.
I admit, I would be one of those guys because I defo don't know what other mods I would need.
07-11-2013, 01:05 AM
#18
2nd Gear Member
Join Date: Jun 2012
Location: Washington
Posts: 389
I have the Boss and it feels weaker then when I was at Coyote trim, but Bat-Sh*t crazy fast from 60-120. I to am cautious about the RPM's and believe in order to go with a useful 84.5mm or 90mm T/B you'll also need; LT's+Shorty Catted-X, PnC heads. With Custom Tune, Boss, axil backs and CAI, maybe stage 1 cams, hmmmmm maybe 450+ @ground.
You'll need a Boss hose kit to make that intake work, Coyote one no workie mit Boss, $109.
Check out your tire options:
You'll need a Boss hose kit to make that intake work, Coyote one no workie mit Boss, $109.
Check out your tire options:
Last edited by VistaBlueFrank68; 07-11-2013 at 01:09 AM.
07-11-2013, 01:07 AM
#19
2nd Gear Member
Join Date: Jun 2012
Location: Washington
Posts: 389
I want this photo as an Avatar, how does one achieve this dubious task?
Check out your tire options:
Check out your tire options:
Last edited by VistaBlueFrank68; 07-11-2013 at 01:12 AM. Reason: Notice the Slick and the Skinnies up front.
