[nukeetwilliams]

want to do a 4v swap in my 04 gt. Originally planned on just going with a long block from DSS but was wondering if I could save money by just changing the internals, and heads to build a 4v motor?

[termi_GT]

Would be cheaper and easier if you went with a Mach 1 longblock or Aviator motor. My car is swapped with a Mach 1 longblock.

[nukeetwilliams]

Originally Posted by termi_GT Would be cheaper and easier if you went with a Mach 1 longblock or Aviator motor. My car is swapped with a Mach 1 longblock.

But would I still need to get forged internals if I plan on trying to make 600+ HP, or will the mach 1 motor support it?

[termi_GT]

Neither one of those will support that much. 450ish is about all that you can safely get out of them.

[nukeetwilliams]

I'm assuming that 450 is straight motor,so what if I throw a SC on it? Thinking about the Mammoth.

[termi_GT]

No 450 boosted to the wheels. It won't handle much over 10-12 pounds.

[WickedSnake00]

Originally Posted by termi_GT Would be cheaper and easier if you went with a Mach 1 longblock or Aviator motor. My car is swapped with a Mach 1 longblock.

Right.

Originally Posted by termi_GT No 450 boosted to the wheels. It won't handle much over 10-12 pounds.

...and right.

You can pick up a B-headed 4v for $400-800, and a C-head for $500-1500. I dropped the $3500 for a 03 Cobra.

[nukeetwilliams]

Originally Posted by WickedSnake00 Right. ...and right. You can pick up a B-headed 4v for $400-800, and a C-head for $500-1500. I dropped the $3500 for a 03 Cobra.

Where is a good place to look. I was looking at shortblocks from Livernois but they seem more pricey than DSS..and CJ pony has their crate going for around 7k?

[WickedSnake00]

Originally Posted by nukeetwilliams Where is a good place to look. I was looking at shortblocks from Livernois but they seem more pricey than DSS..and CJ pony has their crate going for around 7k?

Well everyone and their brother seems to be going to MMR for longblocks and shortblocks lately.

However I would suggest going to your local junkyard. There's ones around here you can pull a motor for $300, and that way your motor comes dressed with everything. Just make sure to thoroughly check the motor before buying it. It's the way to go if you don't mind getting your hands dirty.

[nukeetwilliams]

Correct me if I'm wrong, but isn't the mach 1 block and cobra block the same? If so why would it not be capable of handling more than 450? Seems like there are many people putting out more than that on stock motors.

[WickedSnake00]

Originally Posted by nukeetwilliams Correct me if I'm wrong, but isn't the mach 1 block and cobra block the same? If so why would it not be capable of handling more than 450? Seems like there are many people putting out more than that on stock motors.

There is some variation.

Both 99/01 Cobra and Mach 1 use aluminum blocks, and both have sintered connecting rods and cast pistons. The Cobra and Mach 1 5-speed have forged cranks, the auto Mach 1 is cast. So yes, they're fairly close, and they WILL fail between 450-500hp. The previous owner of my blower chucked a rod through the block at 500hp/540ft-lb in his 01 Cobra.

Now the 03/04 Cobra is a completely different animal. It has a Romeo iron block, forged crank, forged Manley rods, ARP rod bolts, and forged Zollner pistons. These are the ones that can take 800-1000rwhp, and you can see why.

[nukeetwilliams]

Originally Posted by WickedSnake00 Now the 03/04 Cobra is a completely different animal. It has a Romeo iron block, forged crank, forged Manley rods, ARP rod bolts, and forged Zollner pistons. These are the ones that can take 800-1000rwhp, and you can see why.

So basically what you're saying is find a junked cobra if I want to meet my goals, lol.. I had set a budget of 10k, no more than 15k for the whole conversion, and after spending 4k on a brand new T-56 I wasnt meeting my budget going with a new MMR or DSS longblock and building the rearend.

[WickedSnake00]

Originally Posted by nukeetwilliams So basically what you're saying is find a junked cobra if I want to meet my goals, lol.. I had set a budget of 10k, no more than 15k for the whole conversion, and after spending 4k on a brand new T-56 I wasnt meeting my budget going with a new MMR or DSS longblock and building the rearend.

Well it depends on your goals.

If you honestly have $15k for a conversion, give MHS Salvage a call and you can get yourself an entire wrecked Cobra for $11k.

However I'm around that with a whooooole lot of upgrades, such as cams, dual GT pumps, ported blower, etc...

Also I only spent about $2k for my T56, and it was 26spline, came with flywheel, SPEC 3+ clutch, driveshaft, shifter, and mounts.

To give you a suggestion on which way to go I'd have to know exactly what your goals were.

[nukeetwilliams]

Its basically going to be a toy for me, not an everyday driver and I want to break 600hp to the wheels. I'm open for advice as this is my first vehicle i'm looking into doing motor work to.

[WickedSnake00]

If you want 600hp, forged motor, Kenne Bell, upgraded fuel system, call it a day.

If you really want to save money just get a forged shortblock, put your 2v heads on it, order a KB 2.1 (or larger) and maybe pulley it down. 600's all day long.

Cobra is the same approach, except you don't need to upgrade the bottom end, just slap on a twin screw of your choice and you're there. Most of the twin screw guys (and that's with the small displacement ones) are in the high 600's.

[nukeetwilliams]

Now what if I go aftermarket heads and a stage 2 cam? I guess I'm asking, if I decide to push for more power in the long run will a forged 2V support it? and roughly how much you think it would be for a built 2V or 4V swap?

[WickedSnake00]

Originally Posted by nukeetwilliams Now what if I go aftermarket heads and a stage 2 cam? I guess I'm asking, if I decide to push for more power in the long run will a forged 2V support it? and roughly how much you think it would be for a built 2V or 4V swap?

A 2V will support over 1000hp. It's just easier with the 4V because you have a better flowrate right out of the box, and you can dial in the cams better.

Remember, the only difference in these motors is the heads.

Personally I went the 4v route because it let me mount up the Cobra Eaton blower without any adaptation.

That's one of the beauties of these motors is that you have TONS of options. Take a motor of your choice (2v or 4v) with forged internals, a power adder of your choice (centri, twin screw, or turbo) and you can get to 600 and beyond. How you do it is up to you.

[nukeetwilliams]

one last question.. the block in my 04gt is also a romeo block correct? so if i changed out the heads,crankshaft, pistons, etc wouldnt that be the same as ifi put in a cobra motor?

[WickedSnake00]

Originally Posted by nukeetwilliams one last question.. the block in my 04gt is also a romeo block correct? so if i changed out the heads,crankshaft, pistons, etc wouldnt that be the same as ifi put in a cobra motor?

That is true, however...

If you're not planning on making more than 800-900hp, then you can go with a Teksid aluminum block, which will shave some weight versus the iron block.

Second, the devil is in the details, that "etc" covers a whoooooole lot of little parts. It's usually easier to start out with a 4v motor.

I would say your first steps should be to pick out which motor you want to use (2v vs 4v) exactly how much power you want to make, and what power adder you want to use (centri, turbo, twin screw). That will narrow your options.

If you haven't quite made up your mind, you've got some reading to do to see what will fit you best.

[nukeetwilliams]

Definitely want to go twin screws.. I guess I'm going with a 4V, just need to find one for a reasonable price.