Originally Posted by cudaman1969
Originally Posted by Max Weg
I race a fairly fast Max Wedge Superstock car, the first lite weight Plymouth shipped in 64 (in SS/EA I have ran 9.39 at 141), I developed my own engine program as their have not been any SS Max Wedges go this fast. I cross the Stripe at Sea Level at around 8700rpm, I did everything on the heads myself and I have done both original 518 and 518M heads, you have to know which ones to pick. The exhaust side does not need much work but to make 800hp the intake Port needs lots of creative work. Good luck with your Project and be selective on who you use.

Max Weg


And they say big blocks won’t turn! I bet it sounds sweet up top, I had one back in the 70s, a whole nuther sound.




Yes it does!! It has a very flat power curve from 6800 to 8700 and could spin higher but there is no need. The biggest thing is crankshaft stability so a 2 bolt block does not like it, therefore a crossbolted conversion is required. The 518M heads latest version Exhaust Ports can be made to flow almost to good. With creative work on the intake ports you can make a stock port size with a 2.08" intake valve flow over 330cfm. And support North of 800hp na.

Max Weg