4.6 Questions

[Blown94coupeGT]

I currently have a Vortech Superchagred 5.0. Thinking of purchasing a 96-98 GT or Cobra (cobra's are expensive!) The 96-98 Gt fits my plans and budget better. I currently have a 4.6 engine out of a 99GT with 32,346miles on it. I wanna put this motor into the 96-98 car. What is needed for the swap besides the ECU and harness? I'm also thinking of adding a HP stage 1 turbo so the 4.6 will get forged internals. How strong are the stock tranmissions? Will the 96-98 transmission work for the 99+ engine? How much power can the block take? No use in buying 650+forged internals only to have the block crack! Will a 4.64v out of a Mark VIII be better cuz I've found one for 400.00 at a junk yard?

 

[Dan_Soprano]

the motor you have will bolt in no problem at all. Just reuse the coilpacks and fuel system from the 96-98 and get it tuned.

 

[tomustang]

a cobra is expensive?

you want to add a turbo kit...

 

[Red2000GT]

I concur with Don.S

The tranny will bolt up fine,the block is good to about 800hp ish. The tranny will give out long before that.

 

[Gearbanger 101]

The old 5.0L blocks may have gone South at 500-550hp, but the modular block with forged internals will take in the neighbourhood of 1000hp, so don't count on it cracking any time soon. The Mark VIII block isn't a bad idea either. The heads and rest of the components won’t work, since it’s a DOHC design, but the block will. Not necessarily from a strength perspective, but the aluminum block will save you some weight over the SOHC iron block. Just keep in mind, that with an aluminum block, with aluminum heads and an under hood turbo set up, you're going to see a lot of heat soak with daily driving.

As far as the transmission is concerned…..with any mega horsepower car, the need to address the rest of the drive/power-train arises. Were I you, I’d consider a built 4R70W to match the turbo 4.6. It will perform better than any stick and can be build far stronger, for less money in the process.

 

[Blown94coupeGT]

The turbo kit including installation is 7900.00 which also includes dyno tuning. I've found several 96-98 cars ranging from 4500 to 8000. I can't find a single Cobra in decent shape for anywhere near that. Plus the insurace on a cobra is ridiculous! I pay 98.34 a month for my GT and the Cobra would be 174.12????? OUCH!

 

[Blown94coupeGT]

If i swap the 4.6 4v I'd have to buy a new intake for the Mustang cuz the Mark VIII i'm told won't work. I don't want an auto although I've thought about it. The kit they sell is twin turbo with mounting in the front bumper.

 

[forpit2000gt]

if going turbo and you don't want a built auto, better look into a new trans, maybe TKO.

 

[Blown94coupeGT]

How strong are the t-45's?

 

[super302]

How strong are the t-45's?

not strong enough

also, the 4v blocks are WAY strong, the one's from the 96+ cobra and mark VIII are made by an italian company named teskid, VERY strong

 

[forpit2000gt]

the blocks sre not the issue, even 2v blocks are going to handel 1200+, the internals are the key. T45 have broken with 300 rwhp, put a turbo on there and see what happens. Need rear end work also.

 

[super302]

So far my t45 is holding up w/ just over 300rwhp and similar torque
When it goes i'll get a t56 or something else uber-cool

 

[forpit2000gt]

So far my t45 is holding up w/ just over 300rwhp and similar torque
When it goes i'll get a t56 or something else uber-cool

I wasn't saying that a T45 will break at 300, it can, and if you put it behind a turbo, it is deff. a time bomb, depending on driving.