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Discussion Starter · #1 ·
i was wondering if i should go with 4v heads insted of porting mine,the cobra gets 320hp compared to the gt's 260,i figure its in the heads and intake.has anyone done this?level of diffficulty?i can pick up a set of heads(fully assembled,cobra ecu,and intake for about $1,000...feedback please.....
 

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Go for the 4v head swap! I am wanting to do this myself. I'm going to swap an iron gt block and 4v heads into my 95GT and slap some twins on it. As far as I'm concerned, that is the ultimate setup.
 

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Discussion Starter · #7 ·
cool,would the nav heads be better then the cobras?
 

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Navi intake ports are a bit larger than the 4.6L DOHC intake ports. Because of that, a custom or port matched intake would be needed. Not very cost effective for a 4.6L build. I'd get the 2003 Cobra heads or 99-up. The 03 heads are better than pre-03 DOHC heads. The intake ports are better and have the best exhaust ports of all the DOHC heads available.

Go here for good info: http://www.modularfords.com/showthread.php?s=&threadid=3050
 

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that site isn't a 'headswap', it's an 'engineswap'
 

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look through your 'history' in your browser...I'd really like to see that link.
 

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That'll learn ya. If you didn't surf for porn all the time, you wouldn't have to clear your history! :D
 

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Induction Concepts said:
That'll learn ya. If you didn't surf for porn all the time, you wouldn't have to clear your history! :D
Sounds like the voice of experience talkin here :D

But for real the 4V head swap to a 2V block, is a swap that begs for one of the modular Ford web sites to post some tech articles on. The 4V appears to be the head of choice for the aftermarket parts developers. I just read the article in 5.0 magazine on Robert Yates interest and involvement in the development of 4V motors for various forms of racing. Given the lack of aftermarket support for the 2V heads, and the approach of the new 3V variable valve timed heads, a 4V swap is starting to look a little more interesting. One idea I had was get some stock 4V heads throw a kennebell twinscrew blower on it and shoot for an easy 500hp, 500tq, forged botom ended, 2V iron blocked monster. Since I'm gathering parts over time for this engine build-up, (got a good 2V block, and new cobra crank so far), I'm going to be doing some serious research into the 4V swap. I'll keep you posted to what i find
 
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