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post #1 of 26 (permalink) Old 01-18-2005, 12:30 AM Thread Starter
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3.9 Dohc?

Does a new 'Bird motor fit?
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post #2 of 26 (permalink) Old 01-18-2005, 08:33 AM
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Does it fit what? An MN-12 car?

Not without a bunch of work. It's basically a Jaguar engine that was detuned for use in the Lincoln LS and new style T-Bird. Virtually no aftermarket support for it (at any sort of reasonable price anyway), so IMO not worth the trouble.


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post #3 of 26 (permalink) Old 01-18-2005, 08:38 AM
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It is physically smaller than a 4.6L engine, so yes it will fit in the engine compartment.

That said, I agree with Ed completely.

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post #4 of 26 (permalink) Old 01-18-2005, 12:49 PM Thread Starter
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Oh, I thought maybe it was based on the 3.8/4.2 block. Just curious.
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post #5 of 26 (permalink) Old 01-18-2005, 01:47 PM
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Ford does have a 3.9L pushrod engine that I believe is in the same family as the 3.8/4.2, but it is obviously a V6. Just to clarify, you do know that the Jag/T-Bird engine is a V8, right?

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post #6 of 26 (permalink) Old 01-18-2005, 02:31 PM Thread Starter
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Oh, yeah, that's why I was curious why no one really mentions it in engine swap posts. I figured two extra cylinders in almost the same size engine (and four cams) would make it a viable swap, but I can see how it would be a PITA to make work.
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post #7 of 26 (permalink) Old 01-19-2005, 06:31 AM
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Ohhhh, the Jag3.9 is an 8, I was like "wtf, why won't it fit??" Here's why... Couple days ago Thomas was telling me about the 05 3.9 V6 which would be perfect for what I wanna do to my car. After I read those posts I was left just slightly baffled.

+1

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post #8 of 26 (permalink) Old 01-20-2005, 09:41 PM
 
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why? a DOHC 4.6 has more power than a 3.9L and WILL fit! Not to mention I'm shure that new Bird engine has even less low end and why would you wan't to put a smaller engine in a heavy car??

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post #9 of 26 (permalink) Old 01-20-2005, 09:52 PM
 
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Ive actually had the chance to test drive a new bird. While fun to drive. not impressed with the engine power. And they are right. All the new tbird is, a jag with ford and bird emblems on it.
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post #10 of 26 (permalink) Old 01-21-2005, 02:34 AM
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Quote:
Originally Posted by MN12BIRD
why? a DOHC 4.6 has more power than a 3.9L and WILL fit! Not to mention I'm shure that new Bird engine has even less low end and why would you wan't to put a smaller engine in a heavy car??

Jake
I've got a 95 3.8 NA. Drop in the 3.9 overbored and cranked to a 4.2, throw on an autorotor, and I'm betting it'll put out more than a 4.6. And be lighter and stronger at the same time

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post #11 of 26 (permalink) Old 01-21-2005, 05:35 AM
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Quote:
Originally Posted by Falcon5783
I've got a 95 3.8 NA. Drop in the 3.9 overbored and cranked to a 4.2, throw on an autorotor, and I'm betting it'll put out more than a 4.6. And be lighter and stronger at the same time
Go for it. Let us know how it turns out.
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post #12 of 26 (permalink) Old 01-21-2005, 10:11 AM
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Quote:
Originally Posted by Falcon5783
I've got a 95 3.8 NA. Drop in the 3.9 overbored and cranked to a 4.2, throw on an autorotor, and I'm betting it'll put out more than a 4.6. And be lighter and stronger at the same time
Do the same thing to a 4.6, and you'd make a heck of a lot more power. The 3.8L splitport or the 4.6L DOHC are definitely much more worthwhile swaps.

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post #13 of 26 (permalink) Old 01-21-2005, 10:20 AM
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if you build up a 3.9L to its full potential it will be able to handle a lot of boost, and I mean a LOT of boost. Put an Autorotor to a block like that and you've got a very efficiently blown v6. With big valves single-port heads and well spec'd cam I could see it making over 500hp.

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post #14 of 26 (permalink) Old 01-21-2005, 12:20 PM
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Quote:
Originally Posted by Falcon5783
...Couple days ago Thomas was telling me about the 05 3.9 V6 which would be perfect for what I wanna do to my car...
Is he sure about that? The Mustang V6 is a 4.0. At least, according to their website. Does Ford offer a 3.9 in something else?
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post #15 of 26 (permalink) Old 01-21-2005, 12:58 PM
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yes Ford offers it in all the minivans. And the mustang had the 3.9 in 04.

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post #16 of 26 (permalink) Old 01-24-2005, 05:42 AM
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Quote:
Originally Posted by racecougar
Do the same thing to a 4.6, and you'd make a heck of a lot more power. The 3.8L splitport or the 4.6L DOHC are definitely much more worthwhile swaps.
Probably, but I'm not gonna swap out the entire wiring harness. Plus IMO a 6-cyl is much more impressive if it puts out as much power as an 8

Quote:
Originally Posted by Thomas
if you build up a 3.9L to its full potential it will be able to handle a lot of boost, and I mean a LOT of boost. Put an Autorotor to a block like that and you've got a very efficiently blown v6. With big valves single-port heads and well spec'd cam I could see it making over 500hp.
I guess I'll just have to find out and let you all know

Ooh, and also, it's been in my interests to find a way to put split ports heads & intake on top of the 3.9 block w/ the autorotor 1.7 (designed for single-port). It'll probably involve a decent amount of fabrication but that would be cool to say "lookey what I did"

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post #17 of 26 (permalink) Old 01-27-2005, 11:08 AM
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Quote:
Originally Posted by Falcon5783
Probably, but I'm not gonna swap out the entire wiring harness. Plus IMO a 6-cyl is much more impressive if it puts out as much power as an 8


I guess I'll just have to find out and let you all know

Ooh, and also, it's been in my interests to find a way to put split ports heads & intake on top of the 3.9 block w/ the autorotor 1.7 (designed for single-port). It'll probably involve a decent amount of fabrication but that would be cool to say "lookey what I did"

The 3.9L engine only came with splitport heads as the 04 mustang and the minvan that came with them both were of split-port design. the 3.9L is nothing more then a slighty overbored 3.8L. Your better off going for the full 4.2L or 4.3L if you bore it .030 over.

FYI,, the best v6 build would be a 4.2L engine from a 4.2L with the bower up top,, I just came across a guy on ebay that makes a custom aluminum intake that fits the Tbird's SC supercharger to the top of a split-port engine.

Actually,, the kit uses the GM 3800 Blower but here is the link to the kit:

http://cgi.ebay.com/ebaymotors/ws/eB...category=33741


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post #18 of 26 (permalink) Old 01-27-2005, 11:50 AM
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actually the 3.9L isnt bored over, the crank has a longer stroke. And the 3.9L block is mucho better than the 4.2 block, in fact it's got room to add 4 bolt mains. You could easily put the 4.2 crank in it and have a very strong stroked block. And new from Dan Newman a 2005 3.9 block is 200 dollars.
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post #19 of 26 (permalink) Old 01-27-2005, 12:38 PM
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Quote:
Originally Posted by Thomas
actually the 3.9L isnt bored over, the crank has a longer stroke. And the 3.9L block is mucho better than the 4.2 block, in fact it's got room to add 4 bolt mains. You could easily put the 4.2 crank in it and have a very strong stroked block. And new from Dan Newman a 2005 3.9 block is 200 dollars.
-Thomas
The info I got was from someone at ford,, they could be wrong but the full story was the Windstar? minivan had a slightly larger bore in 04 (perhaps because of the new block but thats news to me?) and the mustang recieved the same engine so ford had to also follow que and say it was a 3.9L

I dont see how the rods would be different, heard the 3.8 and 3.9 rods were interchangeable. Also if the 3.9L block is stroger then is it stronger then a SC block? Will it have to be modified for a 4.2L assembly?

Get some more info on this as I'm curious and would like the facts.

Part numbers are handy too!

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post #20 of 26 (permalink) Old 01-27-2005, 02:59 PM
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The 3.8 and 3.9 con rods are the same. Crank and pistons are different.

The 3.9 block does look like a good deal, it's only $299 CAN up here.

Block is Ford p/n 4F2Z 6010 AA. Crank is 4F2Z 6303 AA, it's $311 CAN, so maybe $225 or so down there.


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post #21 of 26 (permalink) Old 01-27-2005, 09:21 PM
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just the design of the block makes it better for power, like the larger main caps and the thicker mains. I would deffinetely say its better than the SC block, and the 4.2 rotating assembly goes right in I think, there's been a lot of talk about it over at v6p.
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post #22 of 26 (permalink) Old 01-27-2005, 10:10 PM
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Quote:
Originally Posted by 97mn-12
Ive actually had the chance to test drive a new bird. While fun to drive. not impressed with the engine power. And they are right. All the new tbird is, a jag with ford and bird emblems on it.
And this is a bad thing? I happen to like the new T-birds, the LS, and the Jaguars. (well most of them) I'd LOVE to have an XKR.


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post #23 of 26 (permalink) Old 01-27-2005, 11:08 PM
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Quote:
Originally Posted by fast Ed N
The 3.8 and 3.9 con rods are the same. Crank and pistons are different.

The 3.9 block does look like a good deal, it's only $299 CAN up here.

Block is Ford p/n 4F2Z 6010 AA. Crank is 4F2Z 6303 AA, it's $311 CAN, so maybe $225 or so down there.


cheers,
Ed N.
hmm, I remember reading the crank was offset a bit more. Maybe they combined longer stroke and slight voerbore to get the extra .1L?

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post #24 of 26 (permalink) Old 01-30-2005, 03:46 AM
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First off, Thomas you're a bastage for posting my info . Dan Newman can get the block for $200 plus shipping. Considering any SC block you're going to find is going to have much higher mileage on it, $200 is a great deal. with the redesigned manufacturing process the 4-bolt mains would be a GREAT advanage. Theoretically you can drop the SC crank in and not have any problem, though a stock 4.2 crank (not forged like the SC) has been shown to handle 400 hp, that's saying something about the stock crank (imagine what the forged SC could do).

Splitport I intend on buying the 05 3.9 block, putting in the 4.2 parts and over-boring it to 4.3L. I'm thinking go with splitport (like you said the 05 freestar, windstars went the way of the dodo bird this year) has the split port heads & intakes on them. I think I've seen that auction before, although I'm not sure if it will work with the autorotor 1.7L. If it will work, I might pick up an adapter set. On the other hand, fabbing something myself at Wyotech might be a little more cost effective and better customized

+1

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post #25 of 26 (permalink) Old 02-19-2005, 01:45 AM
 
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Just put in a mach1 DOHC or Cobra supercharged motor, that'd probably fit lol, the 3.9 engine is a weird engine, doesnt go. I myself own an 04 3.9, yet its an OHV V6 mustang engine lol, wish it was the new LS/Jag/T-bird engine.

My v6 stang though has beaten a V8 LS, not off the line but after about 20 feet i got ahead and won.

I joined this forum because i want to supercharge my 1992 Cougar LS or convert it to a stick this summer using 92 supercoupe components out of junkyards, and then referbish the cougar, new paint and stuff. The mustang will also get a supercoupe supercharger some day too, and then whatever car i like more will get kept, and the other sold lol. (probably will keep the stang just cuz its newer)
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post #26 of 26 (permalink) Old 11-11-2009, 09:56 PM
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ok, i searched but to no avail. i've been wondering if anyone's swapped in a DOHC V6? i've been thinking that an SC upgraded to a DOHC would be pretty sweet. i know i know probably pretty costly, just wondering if anyone's considered it or done it.

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