[Badasstang281]

Planning on doing a short block in a few mounts. Or I can get a 01 cobra with everything I need to put in my 02 GT. What should I do and how much HP can a 01 cobra motor handle with stock internals???

[Garhfer]

stock internals would be the same range as we have up to 450 rwhp maximum

[2001Mustang Saleen]

no dude i have a 2001 cobra and i run it at 490 and 10 pounds of boost and i have been fine for awhile. The cobra motor can hold alot more than the gt motors

[B0B]

you would be much better off getting a forged shortblock for your 2v. it will have a lot more potential unless you go with a termie engine.

[mustangmanic]

Why not just forge your stock block? It'll be cheaper than buying a forged shortblock, unless ur looking for a 302 shortblock, then by all means buy the 302 lol.

But if ur lookin to buy a 281 shortblock, you might wanna consider forging you stock block instead, much cheaper and with the stock crank, u can still handle upwards of 650rwhp.

03-04 termi internals on a 2v gt works very well... and you could handle over 800 with that.

[Badasstang281]

Ya I just want a respectable street car so I think that 450whp to 500whp will put me there. So are stock crank will handle 650whp or so that’s good to know. Maybe I will just get rods and pistons.

[jivepepper]

Originally Posted by 2001Mustang Saleen no dude i have a 2001 cobra and i run it at 490 and 10 pounds of boost and i have been fine for awhile. The cobra motor can hold alot more than the gt motors

The rods and pistons are still not forged. I seen gt's run at 500+ for years a on the stock SB but most blow. I bit of bad gas, weak fp, hit rev limiter a little hard and boom.

[jivepepper]

Originally Posted by mustangmanic Why not just forge your stock block? It'll be cheaper than buying a forged shortblock, unless ur looking for a 302 shortblock, then by all means buy the 302 lol. But if ur lookin to buy a 281 shortblock, you might wanna consider forging you stock block instead, much cheaper and with the stock crank, u can still handle upwards of 650rwhp. 03-04 termi internals on a 2v gt works very well... and you could handle over 800 with that.

Its not much cheaper to build than it is to by a shortblock after machining and balancing.

Termi shortblock will increase the compression ratio when used with 2v heads. That's because the 2v heads have a small combustion chamber. If you don't care about that then they are great. But not as boost friendly as with the 4v heads.

[mustangmanic]

you can put 2v pi heads on a termi? thats odd. lol

So does that mean, i could put termi heads on my gt?

[B0B]

yeah you can, but you will have to get some holes drilled.

[mustangmanic]

is that practical at all, what kind of HP gain would i be looking at with 4v heads?

Would it just be cheaper to port and polish or do some patriot heads?

[HMUSN]

heh..

even with a P/P you will never flow what a 4v head does stock.

[mustangmanic]

so would a 4v head swap be practical? what kind of hp and ca$h am i looking at? cuz i would most do that if it wasnt too expensive...

what all would be involved?

[zkid01]

As far as being practical, i think that is more of a personal opinion. A good built block w/ some upgraded p/p heads and boost will do just fine for anyone who wants a respectible street car. I hear the 4v swap is more trouble than its worth. JMO though.

[mustangmanic]

Yeah thats what i was thinking.

Since it would be a 4.6L 4v, would it pretty much sound like a cobra, you know, that smooth high pitch scream?

Also, by just doing that, would u be able to put a stock eaton termi blower on? or would an upgraded intake be needed also?

[jivepepper]

Originally Posted by Bob17830 yeah you can, but you will have to get some holes drilled.

For the teskid block you do, but not for thr iron 03 cobra block. It s just one water passage for the teskid I think.

[jivepepper]

Originally Posted by mustangmanic is that practical at all, what kind of HP gain would i be looking at with 4v heads? Would it just be cheaper to port and polish or do some patriot heads?

It would be about the same a as a low compression 4v motor. The basic geometry is the same for all modular blocks. Its the heads, intakes, cranks, and pistons that make the differences,

The ported heads would be less expensive. Because you need 4v heads with cams lifters etc, intake, exhaust manifolds, fuel rails, 4v timing chain cover. new h-pipe, it goes on lol.

[Eagle2000GT]

Originally Posted by Badasstang281 Ya I just want a respectable street car so I think that 450whp to 500whp will put me there. So are stock crank will handle 650whp or so that’s good to know. Maybe I will just get rods and pistons.

With enough money you can do anything but forged rods and pistons and a supercharger will get you there. FI overcomes some of the shortfalls of the 2v motor. I've been told that with FI the stock 2v heads are good to around 600 whp.