SB2 Engine: 'Clean Sheet' Design and Manifold Separation (Generation 3)

years by changing the Val ain't going by Milling the deck on an angle which in turn changed the valve angle which in turn gave the straighter shot to the cylinder in the valve before any of those modifications it was probably in the 30 horsepower range but it evolved into hmm The Next Step I don't have one of those to show you was the 18 degree head that Chevrolet came out with and the biggest difference to me it was in the bowel angle and a little different intake runner just looking at them side by side you're not going to be able to tell the difference of course you took one of these and welded it up and milled it to be 18 degrees or something and it was essentially like they were making what you guys were doing to this already that happened yes yeah so that's when you started getting in the 100 horsepower gain over the original cast iron heads the next thing that I can show you is the SP2 you get more of a direct shot intake Runners raised up you see how much prepared from here to the bottom from here gives you a straighter shot to the valves a bigger Runner staggered valves gives it more airflow on both the intake and exhaust wasn't it 1998 that the first time the sb2 was run I think so right real closer 97 98 there's basically a whole different engine the the blocks were different same block height but the lifter for staggered something that is not apparent by looking at this stuff on a bench is that the traditional small block Chevy the intake manifold has a water passage in it that's where the thermostat is and the distributor goes through it also the sb2 got rid of both of those things the sb2 had a separate Valley plate that had the water passage in it with the distributor hole and the intake manifold was totally separate from those things so you could take the intake manifold off without having to screw with your timing or have coolant everywhere much better design for working on a race car but that was a really major change that's when the engines went from 700 or under to 800. quite a bit of difference and all around on this head it's just you can see even on like exhaust side the difference how the runners are hot taller yeah it is looking at it at an angle right how much of the valve that there was of out there how much of the hole you can see out here versus there it's like looking you can see straight through it right but not here yeah I think I did see on here because this is the Hendrick head that it had this uh port on the water jacket…