I was wondering how much power you think I am making? completly rebuilt chevy 400 smallblock. engine #s 3951511 and head #s3998997. block is bored .30over with stock crank, with 5.7 rods, and speed pro flat top pistons. all new bearings and piston rings ,oilpump and gaskets . new crane cam with 224/234 duration at .050 and 454/488 lift and new crane lifters . heads have 1.94intake and 1.5exhaust valves. heads have been shaved .20. new valve guides and valve job. intake manifold is weiand x-celerator. Eldelbrock 600cfm carb

 

no has an answer???

 

way more then my 305..lol


my guess (and only a guess) would be 350+..

it might be higher then that, so dont take anything i say as fact...

 

with me using the junk stock heads, I would be happy with 350-400 HP I am gonna get some better heads as soon as my budget rebounds back from the price of the rest of it(which will be 8 or 9 months) but I will get there

 

It might crack 300 HP with some real good tuning, but I doubt it.

Those smogger heads won't do any better than that.

 

Horsepower is what sells cars, torque is what moves them.

I do have a question though, why would you put all that cash and time into what sounds like a decent engine, only to put crap heads on it?

 

because they are all I have and I broke the bank on the rest of it. It will run with the junk heads, although, not as well, but still it will work for now. I am disabled and on a fixed income and I had to save for a year and a half just to do what is done. I just wanted to get it in and working.

 

My friend had a 406sbc in his S10 with stock heads, a mild cam, weiand x-celerator i think, and a holley 750. He would race at an 1/8 mile track and well... "I have never lost to anything that didnt have slicks" Thats what he said. He also had slicks, a 3:42 rear, and TH350 tranny. 400sbc's are torque monsters, not so much horsepower. He could do a burnout all the way down the track on regular P295 tires. You wont be dissapointed.

 

Well, then maybe the best answer is, it'll make however much it's going to make, no more and no less; and nothing any of us here says, is going to make the least bit of difference.

Let us know what it dynos after you get it installed.

 

I wish I could afford t odyno it, lol but I dont even know of anywhere around here that has a dyno. I am possitive I could find some if I looked hard enough.