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Old 09-16-2014, 07:16 PM   #1
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So here is my speal. I have heard of all the advantages of why you should sell your gt for a cobra or swap in the 4v dohc 4.6L. More valves equals more flow. The stock heads flow better than any 2valve head could hope for. The list goes on. But what are the advantages of building a 2 valve sohc 4.6L. There must be some or why else are all of the pro-NHRA 427ci motors all 2valve sohc motors. So just asking opinions here or personal experiences. I am all ears.

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Old 09-16-2014, 07:19 PM   #2
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So here is my speal. I have heard of all the advantages of why you should sell your gt for a cobra or swap in the 4v dohc 4.6L. More valves equals more flow. The stock heads flow better than any 2valve head could hope for. The list goes on. But what are the advantages of building a 2 valve sohc 4.6L. There must be some or why else are all of the pro-NHRA 427ci motors all 2valve sohc motors. So just asking opinions here or personal experiences. I am all ears.

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Those have a huge displacement compared to yours. Yea if you added 200ci to your displacement you will pick up power, but it's nowhere that easy with a 281ci (4.6). Keeping low displacement in a modular with 2 valves will only be a disappointment.

Those cars also have over 50k in their motors alone.


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Old 09-16-2014, 09:40 PM   #3
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They also have to abide by class rules which restrict what type of motors/suspension/chassis etc... I mean hell, NASCAR motors are dinosaurs but they run them because that is what NASCAR says they have to run. If they were simply limited by displacement you'd see crazy OHC, variable valve timed tech crazy motors.

There are some very big power 2Vs out there too, think 900+ with the TFS heads but the parts are so expensive its not cost effective at all IMO. Just a set of TFS heads and cams alone for a 2V cost more than a whole Coyote pullout or an entire LSx/Trans combo.
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Old 09-16-2014, 09:47 PM   #4
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Coyote swap is where it's at nowadays.


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Old 09-17-2014, 08:15 AM   #5
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I was told a 2valve is cheapest to build when doing a sc build compared to its brothers and sisters including the coyote. Is this now wrong or?

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Old 09-17-2014, 08:25 AM   #6
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I was told a 2valve is cheapest to build when doing a sc build compared to its brothers and sisters including the coyote. Is this now wrong or?

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If you are talking sc's on each motor, the. Yeah most likely. You have the 2v already and don't need to drop 3k on it to start off with. They are probably similar after that though. Except the coyote will rape the 2v. But 3k extra to get it started. Plus the swap is a little harder.


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Old 09-17-2014, 09:01 AM   #7
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I was told a 2valve is cheapest to build when doing a sc build compared to its brothers and sisters including the coyote. Is this now wrong or?

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TFS heads and cams alone for a modular are $3300. Ported PI heads and cams will be $2200-$2500. Coyote pullout is $2800-$3500 shipped if you look. Yes you need another $3-$4k worth of swap stuff. Factor in forged internals, intake and a power adder for the modular and you are $thousands more into the 2V.

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If you are talking sc's on each motor, the. Yeah most likely. You have the 2v already and don't need to drop 3k on it to start off with. They are probably similar after that though. Except the coyote will rape the 2v. But 3k extra to get it started. Plus the swap is a little harder.


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2V is way more expensive to build than the Coyote. Yes I have not personally done it. interwebz research ftw. However, I have seen enough completed swaps to know how much they cost. The only possible way I can see a modular being competetive cost wise is to find a $200 set of Continental C heads and get a valve job/new springs and have them totally done for $1k and use OEM 4V cams. And you still need a power adder.
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Old 09-17-2014, 10:32 AM   #8
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Ya im seeing the advantages moreso of the 4v motors compared to the 2valve.

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