How much NA power
Thread Starter
5th Gear Member
Joined: Jul 2006
Posts: 4,951
From: CT
How much NA power
How much NA power can you get from a 99-04 4.6L? When I get my GT, I want to try and build it NA as much as possible, first, then a KB and be happy around 450-500rwhp.
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
Thread Starter
5th Gear Member
Joined: Jul 2006
Posts: 4,951
From: CT
RE: How much NA power
ORIGINAL: MollyMustang
At 450-500, your stock motor won't last very long.
At 450-500, your stock motor won't last very long.
I just wanna know how much power I can get NA and what I'd have to do to do it. Then when I do all that, I'll put the KB on.
I'm a mechanic in training, and tearing apart engines is something I really like to do, I just want some opinions/advice from people more experienced with the 4.6. I already have a whole suspension and suspension setup planned out, I'm just not familiar with what's good for the 4.6 motor.
Pro. B.S. caller outer
Joined: May 2004
Posts: 9,644
From: IL
RE: How much NA power
ORIGINAL: Xemeth
How much NA power can you get from a 99-04 4.6L? When I get my GT, I want to try and build it NA as much as possible, first, then a KB and be happy around 450-500rwhp.
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
How much NA power can you get from a 99-04 4.6L? When I get my GT, I want to try and build it NA as much as possible, first, then a KB and be happy around 450-500rwhp.
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
Thread Starter
5th Gear Member
Joined: Jul 2006
Posts: 4,951
From: CT
RE: How much NA power
ORIGINAL: JD1969
The trouble your going to have is that in order to get maximum performance N/A you will need to get the compression over 10.5 and that will not play nice with a blower down the road. So unless you want to buy pistons twice, you might want to build it up slowly with the idea of a blower down the road. While you won't have the max hp N/A it will end up saving you $$ and time in the long run.
ORIGINAL: Xemeth
How much NA power can you get from a 99-04 4.6L? When I get my GT, I want to try and build it NA as much as possible, first, then a KB and be happy around 450-500rwhp.
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
How much NA power can you get from a 99-04 4.6L? When I get my GT, I want to try and build it NA as much as possible, first, then a KB and be happy around 450-500rwhp.
I wanna do:
-Fully ported stock heads (I know a machinist)
-Bore over 0.060 and stroke as much as possible (I don't know what the max is)
-Port intake manifolds
-stage 2 cams
(that's just as far as the actual engine goes)
How much rwhp would I be at with that kind of stuff? I'm not familiar with the gains on a 4.6 2v. I'm much more familiar with the 3.8L.
Oh, another question about heads. Are porting the stock heads basically the same as getting Patriot stage II heads or other aftermarket heads? Or is there something different with the aftermarket that you can't get with porting the stock ones?
Thanks
Also, if anyone has an answer to my heads question from my first post, that'd be awesome. Cause if porting is the same as aftermarket, it'll be one of the first things I do.
Pro. B.S. caller outer
Joined: May 2004
Posts: 9,644
From: IL
RE: How much NA power
Most companies that offer heads for the 2v's are just porting OEM heads. That's not to say that you can port your own heads and get the same results. Companies like Patriot are using CNC machines and are super accurite, you won't be able to do that by hand.
Mustang Nazi
Joined: Sep 2004
Posts: 13,444
From: Texas, baby
RE: How much NA power
If you are gonna do FI in the future, don't worry about massive amounts of HP with N/A. Like JD posted, you will need alot of compression for high HP N/A. I am just a tick over 11.25:1 compression and put down 342rwhp and 351rwtq. I am doing some work and will be going for 350+rwhp N/A.
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