377 build up grumpy?

[biohzrd]

i was just given a set of bill miller ent. race pistons. here is my delima. the comp hght is 1.235 which means a normal 5.565 400 rod is to short with a normal stroke of 3.750. the bore is 4.150 which would give me 5 thousandths clearance in the bores. "good to me b/c i want a looser engine". what i've found is this. i could run a 3.48 stroke crank with 6.0 rods and get a hgth of 8.975 which is 25 thous. below a zero deck hgth of 9.00. is this amount that critical or could i live with this. i plan on running twin turbos on my next build up so i thought this would aid in the lower comp ratio. my other questions are could i go below a zero deck hgth and two would any of this work at all. any help would be great.

[grumpyvette]

ok haveing a piston quench area .025 down in the cylinder only means you need a .020-.023 thick head gasket to get the proper .045-.048 quench distance , look here,

http://www.scegaskets.com/results_IE4.asp

 

CHEVROLET 265-400ci V8 SMALL BLOCK PRO COPPER Head Gaskets Gasket Bore 4.155 Thickness .021" 400 Gasket has no steam between cylinders, Special Order Thickness. To delete water passages add "NW" suffix to part#. Example: 011065NW. For 93 & up reverse flow LT-1 add "LT" suffix to part # Example 011064LT # 011152

 

NOW FOR BEST POWER YOU WANT TO GET AS CLOSE TO 7.5/1 CPR AS YOU CAN with that bore and stroke if you run 10 lbs of boost (check it out below)but with flat top pistons your closer too,9.3 cpr with a 74cc head so if thats a turbo engine your building I hope those pistons are dished tops (reverse dome)

 

http://www.turbofast.com.au/TFcompB.html

[biohzrd]

they have a 30cc dish in them. i may be a little off on my math but that should put the comp ratio at about 8.5 to 1. from what i gather from your quote thats not optimal but it is turbo friendly. my machenist said that he would suggest o-ring block/heads and using 1/2 inch head studs for safty sake. i've already got splayed 4 bolt mains so that should help aswell. these are the rods i'm looking at for it

http://cgi.ebay.com/ebaymotors/ws/ebayISAPI.dll?ViewItem&item=1812202369&r=0&t=0

for do you think of this setup. i havn't decided on a cam yet but it will be a roller of some sort and will be used with a set of pro lightening heads. as usual any help is apprieciated.