Intake manifold - Ford Mustang Forum
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post #1 of 24 (permalink) Old 12-27-2016 Thread Starter
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Intake manifold

So soon it's going to be time to add somethings.. I'm going t do JLT CAI LUND tune and a intake manifold.. I'm stuck between the gt350 or the boss. What are halls opinions and which should I go with?

PS wife got me black 5.0 emblems for Christmas and I snapped these on the way home today.






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post #2 of 24 (permalink) Old 12-27-2016
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NICE looking Mustang,as for the Boss manifold,I believe you only see a benefit gain in the very upper range of your RPM.

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post #3 of 24 (permalink) Old 12-27-2016
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Based on what I've read only (I have no personal experience with either of these) and if I were dead set on an intake manifold upgrade I'd pick from hear.

2011-14 Mustang GT Ford Racing Cobra Jet Intake Power Up Kit M-9000-M50CJ

or here

http://www.brenspeed.com/m-9424-m50cj.html

Just realize the best benefits on any of these are probably in an RPM range you can't safely use without other modifications.

I picked the CJ over the Boss due to low end torque. That said, you can find plenty of people who are quite happy with either Boss/CJ alone. Personally I wouldn't on MY daily driver.

Just my 2
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post #4 of 24 (permalink) Old 12-27-2016
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Intake manifold

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Originally Posted by crjackson2134 View Post
Based on what I've read only (I have no personal experience with either of these) and if I were dead set on an intake manifold upgrade I'd pick from hear.

2011-14 Mustang GT Ford Racing Cobra Jet Intake Power Up Kit M-9000-M50CJ

or here

http://www.brenspeed.com/m-9424-m50cj.html

Just realize the best benefits on any of these are probably in an RPM range you can't safely use without other modifications.


Just my 2
When you say safely use, do you mean that the rpm at which the new manifold comes into play in is too high for the car to rev, like its past the factory rev limit? Or are you saying that the factory valve train and or factory "tune" is jinky, and the motor can't handle pulls to redline? Why wouldn't it be "safe?"




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post #5 of 24 (permalink) Old 12-27-2016
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The CJ is the one to get, it is recommended that you do the upgraded pulse ring with it - you'll need a tune regardless of which inake you use so.....

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post #6 of 24 (permalink) Old 12-28-2016
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What is your motivation for wanting to change intake manifolds?

The Cobra Jet intake manifold costs nearly twice as much as a Boss 302 intake manifold. Then there's the added cost of the throttle body for the CJ. The Boss 302 manifold uses the factory throttle body. GT350 intake manifold is also is very expensive.

Yes there is power in the Boss 302 intake manifold. The factory rev limit is 7000 rpm and it needs to be raised to 7400-7600 rpm to take advantage of where that intake was designed to make power. I've switched back and forth between the OEM intake manifold and Boss manifold a few different times. The difference is quite noticeable from ~6500 rpm and up.

Great looking car. I noticed the European plates. Are you from a European country or are you military?
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post #7 of 24 (permalink) Old 12-29-2016 Thread Starter
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What is your motivation for wanting to change intake manifolds?

The Cobra Jet intake manifold costs nearly twice as much as a Boss 302 intake manifold. Then there's the added cost of the throttle body for the CJ. The Boss 302 manifold uses the factory throttle body. GT350 intake manifold is also is very expensive.

Yes there is power in the Boss 302 intake manifold. The factory rev limit is 7000 rpm and it needs to be raised to 7400-7600 rpm to take advantage of where that intake was designed to make power. I've switched back and forth between the OEM intake manifold and Boss manifold a few different times. The difference is quite noticeable from ~6500 rpm and up.

Great looking car. I noticed the European plates. Are you from a European country or are you military?
My motivations are to gain some rwhp/torque. I drive it everyday right now and really just enjoy that. I may run it at a track one day just for fun but this car will never be for that. The plan is to do some bolt ons and try and be in the 430-450 rwhp range. I think that will keep me happy for now. Full exhaust will be next, then cams, then either twin turbo's or super charged. I am not sold on the cobra jet. From the things that I have found, the boss intake is better in the long run for a boosted application.


Thanks for the compliment, I am military, stationed in Italy.
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post #8 of 24 (permalink) Old 12-29-2016
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Since your car is an 11-14 you should just forget about the GT350 manifold. Takes too much to get working and you lose the main benefit over the boss, the charge motion plates.

I would either keep the stock manifold (and maybe get it ported along with the throttle body), or get the Cobra Jet manifold with one of the bigger throttle bodies (twin 67, twin 72, or monoblade. the twins have better drivability for a daily). The boss loses too much torque and the power comes in too late, especially if you keep the stock throttle body.
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post #9 of 24 (permalink) Old 12-29-2016
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Leave the intake manifold alone and install a set of headers.
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Quote:
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Since your car is an 11-14 you should just forget about the GT350 manifold. Takes too much to get working and you lose the main benefit over the boss, the charge motion plates.

I would either keep the stock manifold (and maybe get it ported along with the throttle body), or get the Cobra Jet manifold with one of the bigger throttle bodies (twin 67, twin 72, or monoblade. the twins have better drivability for a daily). The boss loses too much torque and the power comes in too late, especially if you keep the stock throttle body.

There's a current thread on the SVT forum on the GT350 intake, As you said it looks like a PITA to install.

I've seen a handful of CJ and Boss intake setups, and the CJ IMVHO is the way to go. The OE GT500 throttle body works with the CJ, costs $50 and on 93 pump gas will support 440rwhp and spin to 7800 all day long.

OTOH, I did see a CJ with a mono blade, cam swap and the Rev BMF CAI make 490rwhp on E85. The motor in that car has been rebuilt and is a 500+rwhp NA monster. Me want one like it ..


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IMO it's not worth sandbagging the cj with the smallest throttle body. At the very least you should do a twin 67.

As Blazin said though, i wouldn't mess with manifolds until you have a nice set of headers
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post #12 of 24 (permalink) Old 12-29-2016 Thread Starter
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I appreciate all the information guys. Maybe I'll look at doing headers, full exhaust, cai, and tune. What headers do you recommend?
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I went with 1 3/4" full length headers with catted x-pipe from BBK and GT500 mufflers. You don't need to replace the rest of the pipes. I'm pretty sure they are 2 3/4" from the factory.
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Did you checkout the Victor II from Edelbrock?
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post #15 of 24 (permalink) Old 12-30-2016 Thread Starter
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Quote:
Originally Posted by Blazin72 View Post
I went with 1 3/4" full length headers with catted x-pipe from BBK and GT500 mufflers. You don't need to replace the rest of the pipes. I'm pretty sure they are 2 3/4" from the factory.
Where did you get GT500 mufflers?

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