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Trick Flow 44cc Heads vs 4v Heads

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Old 12-07-2010, 11:45 PM   #1
Kerns
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Default Trick Flow 44cc Heads vs 4v Heads

Ultimately what would you do? I hear 4v B Heads will outflow Trick Flow 2v heads will out of the box. Ultimately, I would obviously need more then just the heads. Intake, timing cover, accessories, ecm, etc. But Trick Flow 2v heads are 2k$ and I can't imagine buying 96-98 cobra components would be more expensive than that. Anyway, I would like to hear an argument for each. Ultimately, I will be putting these heads on a forged shortblock so I will basically be building the engine outside of the car then dropping it in.
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Old 12-08-2010, 07:26 AM   #2
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good question im curious about this too for when i build a block
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Old 12-08-2010, 07:44 AM   #3
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depends just how far your taking the hp/boost levels IMO...if your wanting 8-900 then 4v all the way ( get C heads) but anything under that id probably just stick with the trick flows. Although you could probably do a whole 4v setup for what just the tf heads cost lol
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Old 12-08-2010, 09:07 AM   #4
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depends just how far your taking the hp/boost levels IMO...if your wanting 8-900 then 4v all the way ( get C heads) but anything under that id probably just stick with the trick flows. Although you could probably do a whole 4v setup for what just the tf heads cost lol
B Heads outflow C Heads up top and have very similar flow characteristics down low. Only problem is the intake, but with FI it doesn't matter. B Heads are an amazing FI head and can be found retarded cheap.
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Old 12-08-2010, 09:14 AM   #5
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Trickflows without a doubt. A lot less work to do. You don't have to do a harness swap and rewire the COPs and a lot less to worry about. Plus if you buy used heads, I'd have them rebuild and that costs a lot. So I'd just go with out of the box tf heads. Plus blower cams will be half the price!
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Saying there is a 1whp difference between the X and H and trying to justify it as a performance difference, is like walking 100 feet to your car and eating a cheeseburger while saying its fine because you just did "cardio".
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Old 12-08-2010, 09:18 AM   #6
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Trickflows without a doubt. A lot less work to do. You don't have to do a harness swap and rewire the COPs and a lot less to worry about. Plus if you buy used heads, I'd have them rebuild and that costs a lot. So I'd just go with out of the box tf heads. Plus blower cams will be half the price!
Trick Flows with blower cams is going to run you 2600$ range in parts alone. You really think I would spend more on a set of stock 4 heads/cams and other components? Keep in mind stock 4 heads will outflow Trick Flow Heads. Also, it takes all of an hour to switch the wiring on the COPs. Of course it will be easier to do 2v heads as opposed to 4v heads, but its not exactly brain surgery.
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Old 12-08-2010, 10:05 AM   #7
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Well if I were buying used heads, I would be having them rebuilt for use on a built motor. then I would also want to be running a set of aftermarket cams and higher pressure valvesprings and oversized valves. So price out a rebuild with the proper valvesprings and valves and good valve guides and I'd just buy a set of TFS heads out of the box with all the good features that they have. Oh, and I'd also look at Nick's stage 3 PI heads. over 100% load in the mid rpm range.
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Saying there is a 1whp difference between the X and H and trying to justify it as a performance difference, is like walking 100 feet to your car and eating a cheeseburger while saying its fine because you just did "cardio".
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Old 12-08-2010, 10:37 AM   #8
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B heads are garbage get c heads or 03/04
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Old 12-08-2010, 10:39 AM   #9
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B heads are garbage get c heads or 03/04
B heads outflow C heads... and 03/04 Cobra heads are C heads. Although 03/04 Cobra C heads do outflow B heads, but only marginally so. Not sure it would be worth the extra 700-800$ for a very minor difference in flow numbers.
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Old 12-08-2010, 11:26 AM   #10
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b heads only kill c heads if you run a retarded amount of boost. as in over 26-30 psi.

arguement is moot though, B heads plus some 98 cobra or fr500 cams will be a nasty combo and cheap too
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Old 12-08-2010, 11:28 AM   #11
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i would 4v swap it. you should be able to find a complete cobra motor in a junk yard for far less than 2 grand, you can get the heads cleaned up, i wouldnt bother with cams unless your power levels absolutely require it which i doubt they do, and don't forget you can sell the extra gt parts and cobra shortblock to recoup $.
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Old 12-08-2010, 12:18 PM   #12
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B heads outflow C heads... and 03/04 Cobra heads are C heads. Although 03/04 Cobra C heads do outflow B heads, but only marginally so. Not sure it would be worth the extra 700-800$ for a very minor difference in flow numbers.
im very curious as to where you are getting your information from because 03 cobras definitely do not have a c casting head...
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Old 12-08-2010, 12:28 PM   #13
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Quote:
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B heads outflow C heads... and 03/04 Cobra heads are C heads. Although 03/04 Cobra C heads do outflow B heads, but only marginally so. Not sure it would be worth the extra 700-800$ for a very minor difference in flow numbers.
C/Tumble Port: (99/01 Cobra, 99 Lincoln Continental)

http://lmgtfy.com/?q=4v+modular+heads

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Old 12-08-2010, 03:11 PM   #14
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Click the image to open in full size.

03/04 Cobra heads are tumble port design just like the 99/01 heads. They are essentially a revised C head.
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Old 12-08-2010, 03:30 PM   #15
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I just bought a complete 96' MarkVIII engine and a set of Modmax H beam rods for $400, an intake and basic rebuild will not be anywhere near the $2,600 mark for TFS. You wouldn't need high lift valve springs or any of that unless you are wanting to build a full race engine as the 4V heads do not require the high lift cams to achieve higher flow.
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Old 12-08-2010, 03:32 PM   #16
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I don't know what your driving habits are or if this your daily driver, but a 600RWHP DOHC motor will be much more civilized and streetable than a 2v motor in the same ball park.

Are you sticking with the vortech? Or are you thinking about another power adder, like a Kennebell or Turbo or?
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Old 12-08-2010, 03:33 PM   #17
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I just bought a complete 96' MarkVIII engine and a set of Modmax H beam rods for $400, an intake and basic rebuild will not be anywhere near the $2,600 mark for TFS. You wouldn't need high lift valve springs or any of that unless you are wanting to build a full race engine as the 4V heads do not require the high lift cams to achieve higher flow.
Exactly, the SOHC Trick Flow heads with high lift cams will have an extremely rough idle, but that might be what he wants.
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Old 12-08-2010, 03:49 PM   #18
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what lift are you going by when you say the B head outflows the C head? if you are going by the .500 as your determination than you would also have to apply that logic to the NPI VS PI and you could say the NPI out flows the PI and therefore is a better head but everyone know the NPI is a POS head.
There are so many variables for each build that determine what is the right choice not just flow at .500
Most 4V people agree that the C head is the better option when it comes to the 4V
just my .02 but MF is the last place you need to ask this kind of technical question. you are better off over on SVTP or the Corral for real accurate info
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Old 12-08-2010, 03:54 PM   #19
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I don't know what your driving habits are or if this your daily driver, but a 600RWHP DOHC motor will be much more civilized and streetable than a 2v motor in the same ball park.

Are you sticking with the vortech? Or are you thinking about another power adder, like a Kennebell or Turbo or?

and you know this how? I daily drived a 600rwhp+ 2v with a vortech for 2+ years, it wasn't that rough of an idle.
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Old 12-08-2010, 04:31 PM   #20
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I wouldn't think a s/c would be that rough...i think it'd be the cams/intake/gear combo etc..

LIke my cars a lil more rough off idle, but then again i have a pretty big set of 2v cams and such.
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Old 12-08-2010, 04:31 PM
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