2 Questions:
How much hp/torque will a LT1 make with intake/header/exhaust/throttle body?

and

How would i go about achieving 400hp at the wheels without FI with a LT1? Looking mainly at the above mods plus maybe cams? and a tune after? What is required to reach 400? or at least a number close to 400 at the wheels?

 

Assuming the headers are long tubes and there are no cats, you should expect 290 out of a manual car. Subtract 15-20 for the auto. Forget about the throttle body, it doesn't become a bottleneck until you're pushing 425-450 at the wheels.

400 would be intake, exhaust, long tubes, cam kit (cam, rockers, etc.), ported heads and intake, and a good tune.
http://elliottsportworks.com/home/?page_id=53 Everyone raves about the LE2 package.

 

so about the LT1 LE2 heads... it says that itll produce 370-380 whp. im going to assume this is with full bolt ons + tuned. And there is also an option with custom cams (410+hp?). does this mean i dont need other cams? or still need stuff that would come in a cam kit like valves, roller rockers, etc? sorry ahead of time for the n00b-iness

 

The LE2 package comes with valves, springs, locks and retainers all assembled and ready. Get one of the custom cams with it, I plan on going this route when I can. LE2 package with the 224/230 cam most likely. With crane gold 1.6rr and crane rods....I think ha

 

check my build, i am close to 400.

 

I might be wrong, but when using the 224/230 cam an upgraded stall/converter isn't necessary you can still keep it stock? Granted it wouldn't be the most optimum choice but still would work correct? Even then 226/232 says nothing about changing these on an Fbody, only the Bbody would need a stall upgrade and gears....?

 

right i used the stock trans and converter for a short time. it was kinda a pain, idle wont hold at 800, goes to 1000 most times and with the setup i have now it will sometimes go to 12. once in gear with the stock trans it would idle down and want to go.

 

Is it a steady loping though? I haven't looked much into internals and stuff yet since that is far away for me. I know an obvious tune is needed afterwards, but some seem to say different things on how the cam effects the idle and rpm ranges.

 

thanks for the info and craby ill check up on your build thread. any idea of price for engine mods only? i researched and i came up with ~2.5-3k. i could be completely off though

 

oh and i forgot to ask this, but this will be my project car. which has to pass inspection/smog to be driven on the street. any of these mods make the car fail CA smog? headers, intake, cam, heads?