4.6L Motor Questions

[TheSubHumans]

Hey guys, i am a total newb to the modular motors and am very interested in putting one in my '69 mustang coupe that i'm in the process of restoring, and have a few questions about them.

Anyways, i have a chance to buy a 4.6L 2 valve motor with an automatic transmission out of a 2000 GT. I was wondering if the motor can be converted to 4v heads? and can it be converted to DOHC with new heads? does the 4.6L 2V SOHC have the same power potential as the 4.6L 4V DOHC? and does it have the same aftermarket support as the 4V DOHC?

Also, are the 5.4L motors the same bore as the 4.6L? and if they are can they be stroked to a 5.4L?

Sorry for the newb questions, i would have searched my questions alot more but i don't have long untill this motor is gone.

Thanks, Trevor

 

[Rickyll7]

Hey guys, i am a total newb to the modular motors and am very interested in putting one in my '69 mustang coupe that i'm in the process of restoring, and have a few questions about them.

Anyways, i have a chance to buy a 4.6L 2 valve motor with an automatic transmission out of a 2000 GT. I was wondering if the motor can be converted to 4v heads? and can it be converted to DOHC with new heads? does the 4.6L 2V SOHC have the same power potential as the 4.6L 4V DOHC? and does it have the same aftermarket support as the 4V DOHC?

Also, are the 5.4L motors the same bore as the 4.6L? and if they are can they be stroked to a 5.4L?

Sorry for the newb questions, i would have searched my questions alot more but i don't have long untill this motor is gone.

Thanks, Trevor

1 - Not sure about putting 4v heads on a 2v block (probably not worth it, just buy a 4v motor)
2 - DOHC means it has 4v heads (4 cams with 32 valves = 4v dohc)
3 - With power adders, they have the same potential
Naturaly aspirated, the 2v can make up to 300-330 rwhp .
Not sur about the 4v, I would imagine it would be around 400 rwhp N/A
4 - 4.6 and 5.4 blocks are the same bore, but the 5.4 block has a taller deck height enabling the longer stroke. the 4.6 can be safely stroked to 302-305 ci
5 - Tons of aftermarket parts are available for the 2v and 4v

 

[thomas91169]

i would definately go DOHC. if you can find a 5.4L bottom end and a set of 4V heads then you would have an awesome setup.

 

[four six]

4V FTW

 

[Superhereaux]

it's cool you want to go 'new school' power for your '69 but the truth is it probably won't be worth it unless you throw on a supercharger. N/A is a very expensive route to take (stroker kits, cams, headwork, etc.) with these 2v's

if you decide to go modular be prepared to spend alot of time, alot of money and put ALOT of work into it. my guess is even if you get this engine/tranny for free it'll still cost more (fabrication, custom parts, fuel system, etc.) than a 302 based engine/trans setup



it would be a very unique car though, and with a s/c'ed 4.6 a fairly quick one as well

let us know what you decide to do

 

[TheSubHumans]

Hey guys, thanks so much for your replys and putting up with my mod motor illiteracy, i really appreciate it.

I have a few more questions i'd like to ask, if i buy this 2V motor will i be able to interchange the heads with 4V heads? It seems like this would be possible because the 2V and 4V motors bores are the same... if i did this wouldn't it perform just as well as an NA 4V Cobra motor, or is there something i'm missing? And are the intakes the same?
I also have a chance to buy two aluminum Cobra blocks, one is bored .20 over and the other requires a sleave. Each are $200 CDN, is this a good buy?
And i'm not sure if this would be a better question for the classic section but i'll ask anyway, does anyone know if any companies like Painless makes a wiring harness for this kinda swap?

And as for the fabrication part i don't have much trouble fabbing up custom parts as i have all the tools and experience doing that sort of thing.

 

[Superhereaux]

I have a few more questions i'd like to ask, if i buy this 2V motor will i be able to interchange the heads with 4V heads? It seems like this would be possible because the 2V and 4V motors bores are the same... if i did this wouldn't it perform just as well as an NA 4V Cobra motor, or is there something i'm missing? And are the intakes the same?

this has been covered many times before

short answer is it's not worth it. you can do a search to see for yourself, too many parts to swap. same goes for trying to install a stock 'o3 cobra blower on a 2v. it is possible, just not worth the time, money and effort required

as for the wiring harness, i don't think the "00 drivetrain in a '69 mustang" is a very popular swap. couldn't help you there

 

[stangGT97]

Hey guys, thanks so much for your replys and putting up with my mod motor illiteracy, i really appreciate it.

I have a few more questions i'd like to ask, if i buy this 2V motor will i be able to interchange the heads with 4V heads? It seems like this would be possible because the 2V and 4V motors bores are the same... if i did this wouldn't it perform just as well as an NA 4V Cobra motor, or is there something i'm missing? And are the intakes the same?
I also have a chance to buy two aluminum Cobra blocks, one is bored .20 over and the other requires a sleave. Each are $200 CDN, is this a good buy?
And i'm not sure if this would be a better question for the classic section but i'll ask anyway, does anyone know if any companies like Painless makes a wiring harness for this kinda swap?

And as for the fabrication part i don't have much trouble fabbing up custom parts as i have all the tools and experience doing that sort of thing.

Are these blocks Teksid aluminum blocks, or are they from the late 99/01 cobras? 200 bux seems pretty cheap to me. Here is what I would do: I would buy one, and send it to VT engines to have it bored and stroked to 324ci. Then I would top it off with a set of their Stage 2 ported heads and stage 2 or 3 cams, along with a P-51, Bullitt or possibly the new Trickflow intake (whenever it's released). I would think 350 rwhp N/A is a realistic # and you'll have a motor that will love to rev past 6000. Yeah you can make more power with a blower but you can always do that down the road, and you'll have the supporting mods for it (though I don't think the VT N/A stage 2 cams will be boost friendly, could be wrong).

Good luck with whatever route you choose!