Quote Originally Posted by dan05k
yeah, i agree. it is a much better idea to use a whole 4age engine, they are cheap enough to buy.
thanks for the extra info johnny, didnt realsie there were that many difference between the 4ac and the 4afe.
i also know for a fact that the 7afe is forged crank, but like you say , the rods are the weak point where the bolts are threaded into the rod.
having said that i am currently using a 7a block, crank and rods in a 7agte with a big port head a t25 turbo. for now its limited to 10psi boost, but another engine is in planning now, using 4agze rods on a 7afe crank (with the big end journals machined to suit) in a 7afe block that has been decked to bring the compression ratio up to what it should be due to the 4agze rods being shorter.
then we will see about a bigger turbo...
Other things we found out is the late S/T and B/T 20V have a similar cutout as a 7AFE sump ie its not rectangular like normal 4AGE's like 100kw and 4AC, FE etc... any how sounds interesting Dan let us know how you go.