Well fist i was thinking maybe my distributer is bad, then we go ahead and decide, yes my open chamber heads suck, but something is still wrong. Now, my heads flow ~ 280/230 at my lift. My cam is 274/292 .519"/.534" comp NX274, and i weight in at a hefty 4340lbs when i raced. Now I havent gotten on a dyno yet, but i keep getting beat by my friends DSM. He's running @ 13psi, homemade cold air intake, and a 2 1/2" upper intercooler pipe. Now i'm assuming that this is becuase i've got a very nitrous built motor and i have WWWAAAAYYYYY too much exhaust flow to make any N/A torque, Am i right, or does it sound like something else is wrong, providing that i know there is still about 15-20 hp in my carb tuning. Cause i;m realy getting f***ing frustrated cause this motor isn't making me any power, and i dont have nitrous yet (3 wks), so... AHHHH. I;m just pissed, cause it seems like i spent $4500 building a turd. Is this normal...

 

First off, don't be fooled by the "too much exhaust or exhaust is too big" theory. If that was the case, you'd see top fuel dragsters running 1 5/8" headers with mufflers. Right off the bat from reading your post, I see a 4300lb N/A tank going up against probably a barely 3300lb DSM with some healty boost. Power to weight ratio there. You have him by probably 1000lbs. If you figure it's about a tenth of a second per 100lbs, if you guys were running the same exact HP, he'd already have you beat by a second in the 1/4, and thats quite a few car lengths. Your gonna need a lot of horses to move your hot rod vs him not needing a whole lot to move himself out. Figure he's probably running between 250 to 300 hp (just a guess), and he's got a lot less to move. You really need to get to a dyno if you can and see what kind of power you making. That will tell the story. Maybe you don't have a good head/cam combo. That will kill you also. Bigger is not always better when it comes to that. It's how efficient everything works together. My opinion though.

Ken R. 95Z

 

Definitely a possibility. You could have way too much exhaust PORT compared to the intake. There is a local guy here, honest to god, his car runs low 13s, high 12s on motor. On the gas it runs low 10s, high 9s. Its a nitrous motor though. It is a race car, and made to run at the track. Sure, you could drive it on the street, but it wouldnt be too fun.