4.6 dohc cobra intake swap q's - TCCoA Forums

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post #1 of 10 (permalink) Old 01-06-2017, 02:53 PM Thread Starter
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4.6 dohc cobra intake swap q's

I want to throw the cobra intake onto my mark motor when it goes into the tbird. What all do I need besides the upper/lower plenums, throttle body, and maf to make it work? My plan is to build up the mark motor, throw the intake on it, then supercharge with an intercooled kit. Headers will happen and whatever cam shafts are appropriate to maximum hp and still run off of either premium or e85.
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post #2 of 10 (permalink) Old 01-06-2017, 06:09 PM
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Originally Posted by coggonobrien View Post
What all do I need besides the upper/lower plenums, throttle body, and maf to make it work?
Fuel rails, adapter fittings, EGR delete are some of what you need. You'll find out most of the work is all the "little" details.









Once the wiring harness was modified and the intake was in place, the plumbing and various sensor relocation took the most time and effort.

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post #3 of 10 (permalink) Old 01-06-2017, 07:34 PM
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If it's a Gen I Mark VIII engine you'll need the later IMRC's too.

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1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
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post #4 of 10 (permalink) Old 01-06-2017, 07:56 PM
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Originally Posted by racecougar View Post
If it's a Gen I Mark VIII engine you'll need the later IMRC's too.
Good catch.

I used MMR deletes on the '96.
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post #5 of 10 (permalink) Old 01-06-2017, 08:02 PM
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That lincoln logo on the cobra intake is sweeeet.
I love the cobra lincoln logos too. There a nice little touch.

I WANT TO TRADE a 75mm throttlebody and exremly ported vic plenum and a set of 24lb injectors FOR a pi intake and alternator bracket and hopefully valleytube and nipple, pm me!!!
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post #6 of 10 (permalink) Old 01-07-2017, 08:23 PM
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The thread below has a lot of pics and info.

Im not sure what you'l run into as far as fruise/ throttle cables in you TBird, but hopefully either the lincoln parts or the original tbird parts will work. I recently picked up a set of cobra b heads for the intake cames and a cobra intake. I believe you should try to keep the egr, but many have struggled to mate the cobra rgr tube to the lincoln tube and manifold.

I agree that black cobra intake with the lincoln logo looks great. How much did it help the hp?

The Mark VIII Forum - Viewing topic #58038 - COBRA INTAKE SWAP!!!!!!! Beginning.....

96 Saleen Cobra 55k
98 Mark VIII 91K
97 Mark VIII LSC 175k
94 Mark VIII 122k
84 Bronco 351 HO 115K
66 Mercury Monterey 390
49 Lincoln 2 dr
70 Mustang Mach 1 351C 4V Restored
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post #7 of 10 (permalink) Old 01-07-2017, 08:37 PM
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If fuel mileage is actually a major concern, it could be worth the effort to retain EGR functionality. I expect that to many of us here though, the 1-2 MPG difference in part throttle economy isn't worth the hassle.

Rod @ AzzKicker Cars
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90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
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post #8 of 10 (permalink) Old 01-07-2017, 08:54 PM
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Originally Posted by Mach1Motorsports View Post
I agree that black cobra intake with the lincoln logo looks great. How much did it help the hp?
Not sure since I didn't have any prior numbers and admittedly haven't had it tuned for the intake and IMRC deletes either.

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post #9 of 10 (permalink) Old 01-19-2017, 07:23 AM Thread Starter
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Does the same alternator get used?
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post #10 of 10 (permalink) Old 01-19-2017, 08:14 PM
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Originally Posted by coggonobrien View Post
Does the same alternator get used?
Yes.
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