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Thread: 4.6L SOHC Engine swap to 1995 5spd SC

  1. #1
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    4.6L SOHC Engine swap to 1995 5spd SC

    I am needing to replace the motor in a 1995 SC 5spd and am looking at going with a 4.6L Crate motor. And will probably drop a Supercharger on it.
    Wouldn't be an SC without one would it?

    I am not sure what all this will entail.

    Radiator? Tranny? K-Member? Wiring harness? etc....

    Does anybody have any advice to give to a new SC guy?

    ANY! Help would be greatly appreciated.
    And the best advice will win a Half Rack of their favorite beverage.

    Thanks in advance,
    Jim

  2. #2
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    SCCoA Member#1257
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    Dont do it man. 95 5speed sc's are the rarest ones to come by. You would be messing it up by doing an engine swap. Whats wrong with the engine?
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  3. #3
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    Quote Originally Posted by SR71BLACKBIRD
    I am needing to replace the motor in a 1995 SC 5spd and am looking at going with a 4.6L Crate motor. And will probably drop a Supercharger on it.
    Wouldn't be an SC without one would it?

    I am not sure what all this will entail.

    Radiator? Tranny? K-Member? Wiring harness? etc....

    Does anybody have any advice to give to a new SC guy?

    ANY! Help would be greatly appreciated.
    And the best advice will win a Half Rack of their favorite beverage.

    Thanks in advance,
    Jim
    Your 5 speed will not bolt to a 4.6.

  4. #4
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    Good luck bud, you'll have to change the transmission too. There are a lot of wiring differences between the SC and LX so you'll need to be savey on that too. There's a guy with a sweet 4.6 with a Vortech and 5spd that I've seen run. It's almost as fast as my V6. Definititely sounds very cool.

    My point is the V6 can be just as fast up to a point for less/same money. Of course if you are planning on 600rwhp then the V8 is the way to go but it will still cost a small fortune.
    Quote Originally Posted by Miller View Post
    Ya thats why i tape mine down. People think its bc i dont have a moonroof seal (which is true) but its really to keep my roof from ripping off .
    Email me here.

  5. #5
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    As others have already said, don't do it. 95 SC's are rare enough, not to mention 5-speed 95's.

    But, if you have any specific questions on the swap, send me an email at rodsv6cougar@cs.com, and I'll do my best to answer them. I swapped a 4.6L DOHC into a 90 XR7 awhile back.

    -Rod

  6. #6
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    If you wanting to build a 4.6 with supercharger.
    I would start with a 2003 or 04 Cobra.Buy a complete
    Cobra from a junkyard.Then you would have most
    every part needed.Should be able to get one for
    around $10,000.00

    www.junkyarddog.com

  7. #7
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    A 4.6L with a supercharger to replace the 3.8L with supercharger. Hmmm....to be honest, it would simply be a novelty. You would get a cool V8 rumble too, but that would be it. No matter what brand blower you went with, you would be somewhat boost limited on the motor because you would have weaker cast pistons and crank. Therefore, the most you could really hope for is 300ish RWHP. And for that kind of power, you would be spending a LOT of cash. Even if the motor were free you would have to buy the supercharger kit?

    Or you could spend the doe on a supercharger for the 4.6L for an AutoRotor for the 3.8L and be at the same HP level with a lot less headache (getting the motor in there, getting the wiring straightened out, adapting a 5 speed tranny, etc....

    If you are bent on a 4.6L, I would just buy a 4.6L and make that your platform. It would be easier to swap ground effects and a T45 than to go the route you are explaining.

    Micah

  8. #8
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    94 V8 swap

    Thanks for all the advice.

    First off I wanted to make a correction, it's actually a 1994, not that it matters much I suppose but I know how car guys are about technical stuff.

    This is a great technical forum.
    You guys know more about these rides than 99% of the mechanics out there.

    I talked with Denny Aldridge of Aldridge Motorsports and he pretty much told me the same stuff.
    But he sold me when he said he could get me 350-400RWHP and keep the 3.8L platform. Which I am sure will be worth more down the road.

    I still have a goal of building a 600+RWHP Vette eater but I will probably take some of your advice and start with a 4.6L LX platform. Alot of advantages there that I saw once the smoke from burning tires cleared from my vision.

    1 It will be alot easier to swap Trannys than motors.
    2 The project car will be much cheaper.
    3 If I convert an LX, no one will give a rats ***.
    4 If I reduce it to a smoldering pile of crap wreckage, no great loss.

    Although I'm not thrilled about dropping several Grand I can't wait to drive it.

    Thanks again everybody,
    Lets talk shop again soon.
    Jim

  9. #9
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    yep. you would want to go with a 4.6L DOHC 32 VALVE. Thats the only way to go. Either that or a 5.0. I would preferablly drop in a 5.0L CAMMER ENGINE. Oh yeah baby! But its you man. I dont think there are many aftermarket parts for the SOHC 4.6L. And if they are i hear they suck!

  10. #10
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    Quote Originally Posted by darkstar_one
    I dont think there are many aftermarket parts for the SOHC 4.6L. And if they are i hear they suck!
    I hope that's a joke. ANd if it isn't, just stop talking. Please.

  11. #11
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    First off...if your homie can pull 350-400RWHP out of an SC...definitely keep us updated. I don't recall ever hearing that name around the SC community, so if he's going his own direction for go fast goodies it would be very good for us to learn about what he's doing. It's taken us well over 6 years now to consistantly get into the 350-400RWHP range and it was no walk in the park.

    Second....I'm not so sure I would go with a 32 valve 4.6L. In fact, I know that I definitely would NOT go with one. I'm really sold on the SOHC explorer motor. They are cheap....like under a grand. Plus they have the 70lb lighter aluminum block with cross bolt mains (effectively the 6 bolt main cobra block) with PI heads. The motors are generally cheaper, more compact and keeps the stock look in a 96-97 T-Bird LX. I've got visions of assembling an Explorer motor with more aggressive cams, some mild porting, flat black underdrives, chip, gears, etc.... having a 13 second screamer that doesn't look modified.

    Micah

  12. #12
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    Wink Thanks Dude,

    Thanks for helping out Dogg,
    It may be a few weeks before the work is complete and I can pay for it but I am sure I will be letting everyone here know all about it. Like who else is gonna care right? Other than a jealous Bowtie enthusiast who won't believe me anyway!

    Blackbird

    Quote Originally Posted by Micahdogg
    First off...if your homie can pull 350-400RWHP out of an SC...definitely keep us updated. I don't recall ever hearing that name around the SC community, so if he's going his own direction for go fast goodies it would be very good for us to learn about what he's doing. It's taken us well over 6 years now to consistantly get into the 350-400RWHP range and it was no walk in the park.

    Second....I'm not so sure I would go with a 32 valve 4.6L. In fact, I know that I definitely would NOT go with one. I'm really sold on the SOHC explorer motor. They are cheap....like under a grand. Plus they have the 70lb lighter aluminum block with cross bolt mains (effectively the 6 bolt main cobra block) with PI heads. The motors are generally cheaper, more compact and keeps the stock look in a 96-97 T-Bird LX. I've got visions of assembling an Explorer motor with more aggressive cams, some mild porting, flat black underdrives, chip, gears, etc.... having a 13 second screamer that doesn't look modified.

    Micah

  13. #13
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    Quote Originally Posted by Micahdogg
    Second....I'm not so sure I would go with a 32 valve 4.6L. In fact, I know that I definitely would NOT go with one. I'm really sold on the SOHC explorer motor. They are cheap....like under a grand. Plus they have the 70lb lighter aluminum block with cross bolt mains (effectively the 6 bolt main cobra block) with PI heads. The motors are generally cheaper, more compact and keeps the stock look in a 96-97 T-Bird LX. I've got visions of assembling an Explorer motor with more aggressive cams, some mild porting, flat black underdrives, chip, gears, etc.... having a 13 second screamer that doesn't look modified.

    Micah
    Yeah, but the DOHC 4.6's can look soooo good in a MN12:



    When they aren't all dusty, that is.

    Plus, the pre 03 DOHC's have the aluminum 6-bolt main block, too.

    -Rod

  14. #14
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    Lightbulb Motor Swap-SC vs. LX 'Bird

    Hey Bud,
    Would have to agree with a lot of the comments already posted.
    If you want a V8, start with an LX that already has one. There are still a lot of "birds out there with under 150K, and they are fairly cheap. You can search for specific years on autotrader.com with a nationwide search. You will also find SC's on here in the 100-180K(miles) range for under 5 Grand.
    Realize first of all, its going to be heavier, and with the limitations of stock crank and pistons in the 4.6, you don't want to stress it too much. That's why it was mentioned to go with a junkyard Cobra engine. All the good internals are already there, and you need that to even consider putting a blower on it. You will need the trans also, and a BIG shoehorn, to put this in an SC! It can be done, but is a lot of work, and pretty involved! Start with an LX first. But then you won't have all the goodies the SC comes with. Incidentally, yes, the '95 5-speed is more rare than the '94 5-speed, the production numbers are higher for the '94.
    Honestly, your best bet is to just pull out your 3.8 V6, crate it up and send it off to Coy Miller for either a Stage I or Stage II Rebuild. He has many very satisfied customers here in SC-land, and when you stack it all up (including all the labor) the prices are actually very reasonable! The main thing is that YOU WILL NOT BE DISAPPOINTED! That in itself is priceless. You will also have a fresh SC that retains its "stock" configuration, thereby actually making it worth more! Figure it out on paper... you will actually be saving money, as opposed to swapping out with an 8.......and weight.

  15. #15
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    It's been my experience that the LX 4.6L birds are almost always lighter than an SC. Even if the motor is heavier (which I doubt), the entire car is easily 150-200lbs lighter on average. A friends 95 4.6L weighed in just over 3700 when checking the scales at the track. On a good day mine is over 3900.

    Also, Coy Miller would not be the best option. That would be a $7500 option that would turn to $10,000 after cost of crating, shipping to VA and buying supporting pieces for the engine that don't come with the build up like injectors, fuel pump, exhaust, MAF, TB, and it would be backwards to not upgrade the blower to something better than a run of the mill stock M-90.

    For $3500 you could get the AR and with absolutely nothing but exhaust be putting 280-290 RWHP down. Of course 300 is just a fuel pump, injectors and C&L meter away.

    Micah

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