Got some Cobra heads, should I put them on my GT?

[Drew1287]

A friend game me his stocks heads and all parts except intake off his 96 cobra. I am wondering if these heads will bolt up? Will my headers work with them? Basically my question is, is the blocks the same from my gt to a cobra?

 

[Drew1287]

Also, is it worth the money to power ratio to go with these heads or go with the PIs?

 

[Mr. Biglesworth]

No, they will not bolt up. Quite a bit of work is required. Also, your CR will drop and you'll be losing power.

 

[Drew1287]

What do you mean they wont bolt up, I know they will bolt up fine and It will only drop .5 in compression ration which is fine since I am boosting!

 

[FallenPhoenix]

your headers I know wouldn't work with cobra heads. The 4-valve would help power with the blower, and lower compression ratio just means to can up the boost a little more. From what little I've heard about the 2v-4v swap (which is very little) is there are quite a few modifications to be made, including some machine work. Whether it's worth it or not... I'd get a used or new 4v motor before I'd do it.

 

[Drew1287]

so nobody knows ANY specifics on wheather they will bolt up? I wanna know if it will work.

 

[bdcardinal]

theoretically the heads will bolt up yes, however you will have to modify the cooling system, and it would be a good idea to use cobra spec water and oil pumps. you would need new headers, and also a new intake manifold. also it is a very very good idea to get the car tuned asap because your 2v computer wont know what the hell is going on.

 

[yellow5.0cobra]

Dont worry, they will fit, you just have to machine the timing chain tensioner and some other block drilling.

Is it worth it?

Is a lot of time and aggrivation worth it?

I would sell the heads, make some quick bucks and then add to your car.

 

[GoldnGT]

Ok.. in one post you said "What do you mean they wont bolt up, I know they will bolt up fine" and two posts later you say "so nobody knows ANY specifics on wheather they will bolt up? I wanna know if it will work."

Make your mind up on whether you know you can do it or not..

Take the advice of yellow5.0cobra.. I don't think its worth it. Sell them and just buy a 4v motor if you want to go that route. I wouldn't bother personally.

Mike

 

[bdcardinal]

ya i dont really think its worth it. you definately will see more power at higher rpm, however i think if you are taking your current heads off, either follow the advice of some and get them ported, or swap on a set of pi heads. however if you are gonna go boosted then you would want to consider a dish piston because the pi heads will increase your compression ratio