What intake manifold would you run for this combo??

Mustang5L5

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Feb 18, 2001

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Apr 5, 2008

#1

• Apr 5, 2008

• #1

Tossing some ideas for an engine setup around. Wondering what intake would give me the most HP with this combo.


Stock 302/306 lower end
TFS Twisted Wedge HEads
TFS Stage 1 camshaft


Then there would be the mix of supporting mods. 24# injectors, LArger MAF and custom tune, adjustable AFPR, pullies, etc and all that.


Just wondering about the top of the engine. I have a Cobra Intake and 65MM TB, but i'm wondering if that would give it the most potential. I was debating finding a GT-40 upper along with a 70mm TB and porting the lower Cobra Intake, but would an aftermarket intake/70mm TB setup give better numbers??

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

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Thomasville, ga

Apr 5, 2008

#2

• Apr 5, 2008

• #2

the cobra intake and the gt40 flow damn near exact. i saw a dyno chart somewhere that tested a cobra/gt40/explorer and they all came within 2-3hp of each other.

if you have TF heads and cam why not get a matching intake. TF top end kits have been proven time after time.

edit: yes it would have better numbers with a TF upper/lower intake. gt40 based intakes are engineered more towards torque

 

Mustang5L5

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Apr 5, 2008

#3

• Apr 5, 2008

• #3

BK_CAULEY said:

if you have TF heads and cam why not get a matching intake. TF top end kits have been proven time after time.

Click to expand...

Honestly, the main reason i want to stick with the Cobra/Gt-40 setup is visual appeal. I just love the style and look of the Cobra.

However, if there is power to be gained by switching...i wouldn't hesitate.

I just want to see if i can make what i have work first.

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

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Apr 5, 2008

#4

• Apr 5, 2008

• #4

it would "work" but i have personally seen a 20+hp gain on iron gt40 headed, stock cammed motor when switching to a TF intake from a china made cobra intake that is designed for those heads.

so i know a motor with better heads and a cam should see way more. especially with an intake designed to work around the components you already have.

 

Mustang5L5

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#5

• Apr 5, 2008

• #5

True true.


I wonder what I could get for a true (non-China) Cobra intake on Ebay


I may stick with the Cobra for now and swap at a later date. I also was toying with the idea of forced induction on top of all that.

I haven'tt bought any of the components yet...so i may change my mind again.

 

Mustang5L5

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Apr 6, 2008

#6

• Apr 6, 2008

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So...should I jut buy this and call it a day??

http://www.texashotrods.com/storefr....aspx?sfid=70952&i=223841726&mpid=5320&dfid=1

I haven't decided on my lower end yet. I think i'd like to do a 331 setup. My stock bottom end has 106K miles but compression is good and crosshatching is all there, but i'm not sure i'd want to use it.

I do eventually want to toss a blower on all this..but not at first. It may drive around a year or so N/A before that happens. I'm just worried about exceeding 400HP and blowing something up.

Who has good 331 short blocks that can take up to 500HP?

 

5.0Droptop

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#7

• Apr 6, 2008

• #7

Get thee cobra. Have Tmoss port the lower for you. It makes a very noticeable differnce.

 

Grn92LX

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Apr 6, 2008

#8

• Apr 6, 2008

• #8

Port the cobra lower and keep the stock cobra upper. That will work fine.

If you want a stroker, go 347 and talk to Rick91GT, let him build it. He did mine almost 3yrs ago!

 

82CapriRS

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Apr 6, 2008

#9

• Apr 6, 2008

• #9

i say go with a trick flow street heat. idle to 5500rpms its rated at. matches your cam power range. or even the edelbrock performer which is the same rpm range. hope it helps

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

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Thomasville, ga

Apr 6, 2008

#10

• Apr 6, 2008

• #10

Mustang5L5 said:

So...should I jut buy this and call it a day??

http://www.texashotrods.com/storefr....aspx?sfid=70952&i=223841726&mpid=5320&dfid=1

Click to expand...

YES

 

Mustang5L5

That is…until I whipped out my Bissell

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Feb 18, 2001

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Apr 6, 2008

#11

• Apr 6, 2008

• #11

I think that's what i'll do.

I just need to figure out what I'm gong to put it on top of now.

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

0

10

49

Thomasville, ga

Apr 6, 2008

#12

• Apr 6, 2008

• #12

Mustang5L5 said:

I think that's what i'll do.

I just need to figure out what I'm gong to put it on top of now.

Click to expand...

a destroked 302. 289 FTW..besdies it will rev faster

 

Mustang5L5

That is…until I whipped out my Bissell

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Apr 6, 2008

#13

• Apr 6, 2008

• #13

Would that make it a 4.6L?? Or a 4.7L?

 

fiveohwblow

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Apr 6, 2008

#14

• Apr 6, 2008

• #14

I have the Cobra intake and have around 500 crank HP. It helps with torque down low.

Click here to see my thread with my dyno sheet and supporting mods.

I think you will be just fine if you port the lower manifold and gasket match the upper.

Edit: Page three is where the dyno sheet is, I believe page two is where the mods are listed. Stock bottom end, 96,000 miles.