Houle #382
Well-Known Member
Just wondering who's running the 440 Source stealth heads, any issues with them ? What kind of power gain with the stock exhaust manifolds.
Just my opinion, but running those heads with stock manifolds is a waste of good horsepower, not to mention money.Just wondering who's running the 440 Source stealth heads, any issues with them ? What kind of power gain with the stock exhaust manifolds.
Just wondering who's running the 440 Source stealth heads, any issues with them ? What kind of power gain with the stock exhaust manifolds.
Those links didn't take me to.....very much.....Lots of people running, them, and the issues are pretty well documented by now.
Type these in your google search bar, tons of good reading--
Stealth head site:www.forbbodiesonly.com
Stealth head site:board.moparts.org
They aren't really links... type exactly as I showed, or just copy and paste one into the googly search. You'll get pages and pages of relevant results.Those links didn't take me to.....very much.....
Got it.....but that was different lolThey aren't really links... type exactly as I showed, or just copy and paste one into the googly search. You'll get pages and pages of relevant results.
Waste of money!! You can get those same gains with stock heads if you're going to use restrictive stock manifolds.I Disagree with the ‘pointless if you use stock manifolds’ comments. Depending on your build you can still gain quite a bit. Just not as much as a car using a header or more free flowing exhaust.
Waste of money!! You can get those same gains with stock heads if you're going to use restrictive stock manifolds.
You need to tell us what you have now and how it performs to give an idea of relative improvement.
My current set up is, 440 .03 over Straightline performance hydraulic flat tappet cam 226/238 duration @.05 503 lift with adjustable hydraulic rockers, Edelbrock Performer RPM intake with a Edelbrock 650 AVS-2 carb. Pertronix 3 distributor. 4 speed with 3:54's. This winter I plan on going with a Scott Brown Hydraulic Roller setup and possibly a new set of heads not sure who's heads right now. Not sure about the Eddie's as the plugs are set at a angle and if I decide to go with headers not all headers will clear the plugs. 440 source heads and Mopar Performance heads have straight in plugs like factory heads, I like the Mopar heads but are about $800 bucks more than the 440 source heads. I do know some guys running the Mopar Heads and they really like the improvement but I do have a budget and the way this country is heading who knows what's going to happen and might need my car fund for other things to survive LOL
A few comments if you stay with manifolds:
I assume the Scott Brown cam you have now is ground with a 112° lsa, as that is what Scott normally does. In my opinion, your 226/238 on a 112 lsa is a real nice exhaust manifold cam.
Be sure to have a direct and detailed conversation with Scott on the hyrdaulic roller upgrade. A 238°/246° even on a 112° lsa might be a little big, but I've never tried a hydraulic that size on a 440. And seat timing matters too. An aquaintance had his exhaust manifold car running 11.50s @ 116 with a smaller Scott Brown solid lifter cam, then switched to a 240° -ish hydraulic and is sucked power out of it, like 3 tenths and 3 mph. I think it hurt average power (verses peak power), but that is a guess.
In short, exhaust manifold motors are sensitive to cam timing and unforgiving with the wrong cam.