POISND U

I still wanna hear how a 3V is better than a 4V....

Stone629

Personally, I would'nt bother trying to make a 3v or a 4v head mate to a 2v. I would just drop a completeMach 1 engine in there and call it a day...But that's not what this thread is about.

A 4v swap is going to cost. I do know that. But being that nobody has yet to put a 3v on a New edge stang (I haven't heard of any yet), there is bound to be some unknown headaches. As far as you guys that are saying a 3v is better than a 4v. That's a negative. 3v cars don't respond to mods or make equal power to a 4v. Not yet anyway. I'm sure in the next few years they will surpass our lowly 4vs in performance.The slight weight difference in the extra two cams does not offset the benefits between the two.

I am strictly refering to 2003 and up 4vs BTW.

silverstang1996

HAHAH you still obviously don't know what you're talking about man. Nothing personal but when someone says the wrong thing it needs to be corrected. Look at any mustang magazine on the advertisments. I'll quote what Livernois Motorsports has to say about this in their ad:
3 valve FULLY PORTED STAGE III heads: 300/215 CFM
4 valve FULLY PORTED STAGE III heads: 330/275 CFM
So, unless you think your knowledge beats that of Livernois, you're wrong.

tbirdscwd

Umm those aren't 96-98 or 99-01 heads. Those are 03-04 style heads, I don't think Livernois even sells the older heads. Granted they will fit on earlier blocks as we all know. But I think Sean Hyland knows a thing or two about modular fords and their stage 2 flow 273in + 195 exh, 7500 dollar Full race port on the old style only flows 288 in + 237 exh. Your right about the newer heads, they are monsters, but the older ones leave much to be desired.

silverstang1996

No those heads flow practically just as well, they still would kill 3v's on the exhaust flow anyways because they have a whole valve more. I have the SHM 4.6 bible and it's not on my hands at the moment but I remember the 03/04 heads don't even flow that much greater than the older styles. They flow like 20 CFM or so more on the exhuast side and that's about it, the intake side isn't even within 10CFM if I remember correctly. LikeI said nothing personal, but I tried getting on SHM site to see ifI could be wrong, but it's not working, cause it sounds like you know your stuff so I'm not gonna say you'rewrong for sure anymorehaha[8D]

dsbsurfn

[/quote]

No those heads flow practically just as well, they still would kill 3v's on the exhaust flow anyways because they have a whole valve more. I have the SHM 4.6 bible and it's not on my hands at the moment but I remember the 03/04 heads don't even flow that much greater than the older styles. They flow like 20 CFM or so more on the exhuast side and that's about it, the intake side isn't even within 10CFM if I remember correctly. LikeI said nothing personal, but I tried getting on SHM site to see ifI could be wrong, but it's not working, cause it sounds like you know your stuff so I'm not gonna say you'rewrong for sure anymorehaha[8D]
[/quote]

An extra valve does not automatically mean better flow. There are many things that go into head design. The 4V will outflow a current 3V, but that may not be the case in the future.

ShadowDrake

You guys are forgetting the advanced cam timing as well... sure the extra intake valve helps the 3v a lot, but when you remove the variable cam timing... what are you left with? Either A) no low end power, or B) very little extra high end power... This swap is a great idea, and will be cheap due to all the 3v's that are being produced... just hold off till someone releases a computer that can retain the variable cam timing. Locking it out is throwing away a LARGE part of the engineering.

Aereon

I am still wanting to know a cost benefit ratio of the 2v -> 4v and 2v -> 3v.

2000GT4.6

+1

I would like to see exactly what can be done for streetblity and power levels if you run a wild cam in a 3v and then play with the VCT. it seems to me if you could set the timing up correctly on the VCT it could have the best of both worlds, top end pull like a racing cam and low down grunt like a stocker.

silverstang1996

Well I did a lot of research on both engines before I did my swap, because Iwanted to see which would be more beneficial. If you go on places such as karkraft you can find 3v engines for quite good deals at times. 4v engines are normally more expensive unless it's from a private seller(that's where I got mine from). I chose the 4v because some parts for it are cheaper(nevermind cams hah) since the 3v is new technology, and it has more parts on the market currently. If you'd use a complete 3v engine(which is what I'd do in the 1st place) you'd have to work with your motor mounts, and I'm not sure whatever other custom work that would be, but since I knew I wanted to avoid labor costs, custom work was out of the question for me, so I just dropped in the 4v which bolted right up.