4.6 Short Block

[RWK]

Will a 4.6 Romeo short block out of a 2003 Mustang interchange with the 4.6 Romeo block in my 1998 Mustang GT? thanks

 

[wmburns]

yes and no. Matching a set of non-PI heads with a PI bottom end is likely to give an unacceptable CR.

What are you trying to accomplish? Why not use a full PI motor?

 

[Deleted member 38176]

yes and no. Matching a set of non-PI heads with a PI bottom end is likely to give an unacceptable CR.

+1

That setup would yield a CR well into the 8's....which on an N/A motor will run like a DOG!

 

[Winters98GT]

It will run like a dog no matter what you plan to do with the car. Low compression is not good, it's old school thinking no matter what you do with the car like I posted in another thread.

NA/Nitrous-11.1:1+
FI-10.1:1-10.5:1.