can someone explain sb2.2 heads to me? also what about 18* and 15* heads? what has to be changed to run any of these heads? good for a street motor? thanks in advance

 

Ryan

 

there are several differances between the sb2.2's and even some of the 18 and 15 deg heads.. they can be good on the street but I would recomend a big ci small block.. on all three choices they will require special intakes, and headers. I'm not shure about acc bolt holes. there are a lot of people on here that know more abut those then me someone should post.

 

http://nascarheads.com/chevy_heads.html

Scroll down the page and there's a brief list of specifications for the 011, 021, 559 & 560 heads. Pay attention to what you're buying should you decide to buy used stuff.

With the 18 & 15* heads you will need special pistons, shaft rockers, intake manifold and headers.

The 2.2's will require all that along with a sb2.2 specific camshaft. Of course the studs and other hardware are different as well.

-Mindgame

 

If you want the more basic answer than what you have so far....

18° and 15° heads have a valve angle that is that far off perpendicular (from the deck) tilted towards the intake or center of the motor.

SB2.2 heads are 11° x 4° on the intake and 8° x 0° on the exhaust.... The x 4° on the intake means that it's also tilted away from the bore 4° so it's a canted valve head, just like a Ford Cleveland or Big Block.

Bret

 

oohhhh ok, well then these arent for me. i was looking for something a little more budget friendly and had head about these heads, just didnt know anything about them. thanks for the answers everyone.