I have a 06gt 5speed and over this winter i will begin my plans for 600/600 at the wheels on a dialy driven car. i can sell my short block (2k miles) and swap in another engine. Im not sure what would be the best route to go.

Do a shelby swap?
- if so does anyone know what modifications to the GT to get it in there?
or a lightning, 03-04 cobra, or ford gt swap?

or would it be cheaper to build up my current? I dont want to be pushing the limits on anything, i want it to hold up for 80k miles. Basically how can i do this right?

for a power adder im leaning towards a Magnuson Magnacharger Supercharger, wipple, or twin turbo setup.

anyone know what would be the cheapest way but still be very reliable?

 

Its kind of hard to say what the cheapest thing to do is, this is a complicated swap, maybe not so much mechanically, but electronically.

I think you're best bet would be to pull your existing motor and strengthen the bottom end, the weak links are the rods and pistons, so some forged pistons and h-beam rods are mandatory. I think the crank is strong enough to take the abuse, but i'll let some more senior members comment on that, you can always upgrade to a steel one (I think one is for sale in the buy & sell area). The heads flow just as well as the 03-04 Mach1's. With this route you don't have an electronics nightmare to make it all work, but still have a lot of tuning work.

 

From what I have read, anything above 450 rwhp, you should upgrade the crank. With what you are trying to achieve should be plausible with an engine build up.

Some guys, without power adders are nearing the 380-400 rwhp mark. So, with a potent power adder, 600 or very close to it shouldn't be that hard.

With forged internals, supercharger/twin turbo, ported heads, upgraded fuel management, cams, etc., you should attain your goals, and do it reliably. Of course it will probably cost you somewhere to the tune of $13-$14K to do it.

If I win the lotto, I'll build my car up and give you the blueprint for a 600+ rwhp motor! Or you could just ask Sean Hyland or Livernois to build you one. They have already met and exceeded the power goals you're after.

 

I've seen that the numbers sort of match up but it just doesn't sound right, still. I don't see how a 3v is going to hold up to a 4v. Ported the 4v is definatly going to win out.

If you want to swap the motor find a teksid block, 4v heads (usually on teksid blocks anyway), forged everything, then boost the hell out of it. You'll get 600 easy. Also don't forget about your trans and rear end. They will definatly need to be upgraded.

 

4 valve heads and Teksid block would require you to change everything. headers/ exhaust manifolds, ECM wiring harnesses, motor mounts, etc.
This would be a very expensive swap.

There is no reason a 3 valve head cannot meet the performance of a 4 valve head. The flow numbers have shown this.
The stock block can be upgraded to have a steel crank, connecting rods and forged pistons. This with a good power-adder would be as good as any 4 valve motor.

 

No, then the block would be your weak point. I don't know how much it can handle but I don't think I would want to run 600+ on it all the time. Blocks are not invincible. I also wouldn't say ANY 4v motor. Seeing as the ford GT motor can handle 1000+ on stock everything, including fuel system.

 

http://www.vtengines.com/store/index...Path=11_38_150

I'm wanting a 302 forged stroker myself. I'll probably go this route first, then do some sort of forced induction immediately afterwards.

You DEFINATELY do not need to do a labor intensive, expensive needless swap, ie throwing in an 03-04 Cobra engine or the likes. Simply don't need to do it.

 

Thanks for the great feedabck. What im primarily concerned with is the stock block handling 650-675 crank hp. Ive seen the romero (sp) block and teslid block holding that kind of power, but im not very confident with this block. Im sure if the shelby is putting down close to 500 at the wheels with a tune, another 100 shouldnt hurt it.

as for tranny i have my eye on the viper transmission swap. Rear end is still up in the air, might bullit proof the 8.8 or just swap in a 9in.

again thanks for the feedback, keep the ideas comming.

 

From my musings on modularfords, 650-675 crank is a bit over the limit for a stock block. If you are wanting to do that, I'd suggest a built block.

No idea on the tranny, I know for a fact the auto as is will have a tough time -- but you are likely looking at a swap there as well.

The rear end, seemigly most opt for bullet proofing it instead of swapping in a 9 inch unless you are doing a dedicated track car.

I would say "throw in a 5.4" -- but, I'm just not sure if the block from Ford can be had for anything reasonable, especially compared to a 324 3v you can buy for 4500 or so.