396 Build Up

[VintageMusclecar]

Jim;

Given the appropriate state of tune (and assuming all the machine work is spot-on and everything is fresh & healthy), there's no reason that engine couldn't make 425+ HP on an honest dyno. The box-stock 750 VS and that cam are leaving some power on the table.

Eric

[VintageMusclecar]

Jim;

Bob's car is another great example of an oval port BBC, but as you said, it's a 505" deal with Brodix heads, and hence not the one I was referring to earlier.

Please allow me to reiterate:

[ QUOTE ]
(I'm not going to mention any names, and for those who know whom I'm referring to, please follow suit)

[/ QUOTE ]

[68427imp]

Thanks for the info Eric.The car being a daily driver(in the summer of course!) I didn't want to over-cam or over-carb it.Maybe I should of went with a modern XE grind...I was kind of hoping for 450,it's such a heavy Chevy.

[VintageMusclecar]

I wouldn't overly concern myself with the HP #'s, you've got a good street combination that should make ample torque to move a "Heavy Chevy" down the road with ease.

[69 Post Sedan]

If I run the 4 bolt main block that came with the car I am thinking of running Keith Black FHR forged pistons that are 4.165 (396 +.070) which is only 17 cubic inches less than a standard bore 427.

http://www.summitracing.com/parts/UEM-IC9949-040/

[69 Post Sedan]

I took the block that came in my car (3999290 4 bolt main) in to have it cleaned and double checked to make sure of what I have. When I had my engine builder take a look at it he said the bores were perfect and straight. Initially I was told the cylinders were .008-.009 on the big side. It's already .060 over. If I have to bore it again that would make it 396 +.070 or a 402 +.040. Do you know how hard it is to find pistons that are 4.165 for a BBC?

I have a cast crank and HD 3/8" rods that are going to get completely rebuilt.

The 077 heads should be at my house this week. They are getting checked out and flowed.

The cam Mark talked about in a earlier post is what I am leaning on running which is also what Comp. Cams suggested. 11-770-8 or XR274R. It has good low end torque with steetable manners.

Carb and intake are up in the air yet but my engine builder liked the TM2R with the 3418 Holley.

[Postsedan]

Sounds like all the puzzle pieces are coming together

Dan

[Chevy454]

[ QUOTE ]
Do you know how hard it is to find pistons that are 4.165 for a BBC?

[/ QUOTE ]
They make 'em every day! Gonna be hard to find something off the shelf probably to exactly nail the compression you're looking for anyway, and the quality would be WAY better with a custom piston anyway...the specs are usually all over the place on the off the shelf slugs. But, just my $.02

[69 Post Sedan]

Rob I contacted a few piston companies and Ross quoted me $915...just for pistons. That's too steep for me.

If I can get some made for less than that I probably would but so far I have not heard from anyone that I can afford.

I figure I will have to go with the KB pistons, try to lighten them up a little and get a lighter wrist pin.

Depending the head gasket thickness, the compression on the KB pistons will be around 10.1/10.5 to 1.

[69 Post Sedan]

I am still having a real problem with finding good pistons for my 402.

Does anyone have any recommendations on another piston company to contact for custom pistons? I realize it's not a standard piston but holy cow I don't want to buy their company...I just want 8 pistons made.