General TechAsk model specific questions in the appropriate category below. All other general questions within. Sponsored by NewTakeOff
Welcome to Mustang Forums!
Welcome to Mustang Forums.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
SOME WOULD SAY WHY CHANGE SOMETHING OUT WHEN ITS WORKING WELL....I HAVE A 347 STROKER MOTOR CURRENTLY IT HAS WORLD WINDSOR JR HEADS ON IT A 547 LIFT CAM , I FEEL LIKE THE MOTOR IS NOT AT ITS FULL POTENTIAL WITH THESE HEADS THEYR ONLY 180CC. I WAS THINKING OF GOING TO RHS 200CC HEADS WILL THIS MAKE ENOUGH OF A DIFFERENCE TO WARRANT THE MONEY SPENT?
ITS ON A 67 MUSTANG 355 POSI, BUILT C4, 2500 STALL, INTAKE IS A WORLD RPM TYPE BY LOOKS AND CURRENTLY 770 STREET AVENGER CARB...
ANY IDEAS APPRECIATED, ID SAY IM PUSHING AROUND 400 TO 420HP CURRENTLY WOULD LIKE TO SEE A 50HP GAIN IF POSS BY CHANGING HEADS AND INTAKE....MAYBE IM DREAMING
This ad is not displayed to registered or logged-in members. Register your free account today and become a member on Mustang Forums!
67 Stang, 347 Roller, WINDSOR JR heads and RPM intake, 770 street avenger carb, c4 and 3.55 POSI 8" rear
I've been porting heads and building engines for more than 25yrs. but have been doing NASCAR exclusively for the last 15-20yrs. I did a little research on those heads you listed. I would say that the heads you have are a little small and the RHS head would help but you won't see a 50HP gain, more than likely not anywhere near that. Even with a fully ported set of heads you would be lucky to see a 30HP gain.
Check out the Coyote 5.0 thread I picked those up about 30CFM and were hoping we see a 20HP gain.
Just my .02 cents.
This forum is owned and operated by Internet Brands, Inc., a Delaware
corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford
Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor