Motor swap questions

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phreakness

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I'm thinking about a motor swap in the ol' gen2. The things I’m thinking about right now are motor mounts and torque converters.

Are motor mount specific to the motor or to the car? I'm looking at a newer mod motor (99% it will be a built 2003 GT motor) and need to be positive on the motor mounts

Torque converts and transmission are a great mystery to me but I've got the transmission covered but torque converts have me baffled can anyone give me some insight or point in the right direction?

I'm looking to start with just the motor swap then the rest of the drive train as the money comes around. I should around 300 -320RWHP to start then the "intake fan" will come soon after the motor is broken in
 
Why would you want to swap a 4v 4.6 for a built 2v 4.6? Why don't you just build your 4V?
 
If your going to build an 03 4v the only part of it that will be an "03" is the heavy azz iron block.Do yourself a favor and stick with the alluminum block.
 
I would like too, but this motor is help out a friend, it too good of a deal to pass up I'm basicly getting a 03 cobra motor for the price of a V6 and a S-trim to sweeten the deal. I understand the Aluminum block is lighter and etc. but I've got the money and he wont take a "Grant / Loan"
 
All mod motors have the same motor mounts. Is it a GT motor or a Cobra motor? I'm confused. (stock) Cobras have an 8 bolt crank and (stock) GTs have a 6 bolt crank; check the motor to see what it has. I think the Marks have 6 bolt cranks as well but I'm not sure. If that's the case, you'll have to find an 8 bolt flexplate (from an auto Mach1?) but your stock tq converter should bolt up and work fine.
 
Windsor Truck motors also have 8 bolt flexplates. The heads will have different exhauste ports and will require either some semi custom Kooks' or a bad miss match between the ports and your stocker manifolds. I have heard that the front accessory drive might hit the cradle aswell, but that might just be the '03-'04 Terminator Cobras with the drive pulley for the blower. With that kind of power to throw down, I'd think that a built tranny would be a priority aswell.
As a comment on the Al vs Fe block issue; Al blocks are lighter but generally less dimentionally stable which hurts ring seal and increase wear on parts and they are also overall less durable at higher power levels unless drastically strengthened. This is exactly why the Terminator Cobras have Fe blocks not Al. Its also not just mod motors, if you look at what they did to the Northstar to make the 4.4L LC3 out of the previous 4.6L L37 you'll notice the drastic improvements in strength they incorporated including a smaller bore for more head gasket seal area.

Don't get mad, get informed,
 
Just to clarify what I meant to say on the motor mounts was that the mounting location on the block is the same so use MarkVIII motor mounts. Also, I found a part # for the 8-bolt flexplate for an 11.25" converter, it's XR3Z-6375-EA.
 
03/04 Cobras and the 07 G500 have iron blocks for cost saving reasons. Do you think the 03/04 Cobra iron block is a specially designed block? No, it is the same exact block as the 01-04 Mustang GT's. Now that doesn't mean it's a bad block, it's almost bullet proof actually. But take a look at the Ford GT it is the top of the line Ford car and it has an aluminum block. Besides the 05 GT aluminum block, the 93-98 aluminum Teksid block has been proven reliable for well over 1000hp with simple modifications to the stock block.
 
Ok a little more detail. Its a 03 cobra Iron block motor with a built bottom end (manley, ARP, etc.) an 03 GT intake system and a Vortec blower. 8.5 compression. basicly a 03 cobra and instead of a root its a centrifugal setup

Since I cant get a aftermarket hood I like for the Gen2 this will fit under my stock one.

A guy that I know real well is taking my 80k mi 4r70w and a 500 mi T-56 in trade for a monster built 4r70w. He wants to know what kind of stall I'm going to have and I have no idea.

on delivery it will have a 8 bolt crank and from some research I thing an Auto F-150 flex will work for me. But thanks for the part number I wil add it to the list of parts.

Kooks said it would be no problem with me ordering a set of headers for this situation, all they will need to do is use the 03 cobra flange on a mark 8 pipe bends.
 
dont forget radiator clearence, cooling cross-over routing, etc. I am pretty sure the newer engines utilize a different thermostat location, and cross-over design.

Not a big hurdle, but a hurdle none the less. I would also replace your front swaybar, and or sway bar bushings while the mill is out...adding that weight will make a difference in handling, that's for sure.
 
I'm not worried about little things, they will work or made to work. I'm looking for show stoppers like if the motor will mount in my car with my exsisting mounts and what kind of torque coverter stall is best in this applicaiton. Those are my big show stoppers I'm addressing right now.
 
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