434 or 454 SBC?
Melting Slicks
Joined: Jul 2000
Posts: 2,112
Likes: 2
From: Peoria IL
Brodix 18x are bad arssed. As far as I can tell the only trick part that they require are 18* pistons. The valve train, intake and exhaust are all standard I think. On another note, the 244cc intake volume is misleading because as the head is rolled out, the intake volume increase even if the port cross section remains the same.
I'd love to build a big inch small block with some of them.
I'd love to build a big inch small block with some of them.
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
I never thought about the cross section being the same with the rolled valve. Can't beat a 320 CFM head right out of the box for under 2K though.
That's my dream motor, 427 CID with these heads 250-260 roller cam. vic jr and a 950 HP. It looks like 580 HP on DD2000.
Maybe some day...
That's my dream motor, 427 CID with these heads 250-260 roller cam. vic jr and a 950 HP. It looks like 580 HP on DD2000.
Maybe some day...
Thread Starter
Racer
Joined: Oct 2000
Posts: 491
Likes: 12
From: Los Altos Hills, CA
gkull:
Sorry for the delay in responding, I was out of town last week. You misunderstood my latest posts. I realize that with -20cc pistons you can get pump gas friendly compressions, I was just concerned that the only pistons I've seen in a 454 at -20cc have been full dish with little quench area.
I also haven't seen any other gasket than the Fel-Pro 1036 that is set for a 4.25" bore. The Fel-Pro 1036 has a .051" compressed height.
Thanks for giving a data point on Bill Mitchell's engine builds.
Sorry for the delay in responding, I was out of town last week. You misunderstood my latest posts. I realize that with -20cc pistons you can get pump gas friendly compressions, I was just concerned that the only pistons I've seen in a 454 at -20cc have been full dish with little quench area.
I also haven't seen any other gasket than the Fel-Pro 1036 that is set for a 4.25" bore. The Fel-Pro 1036 has a .051" compressed height.
Thanks for giving a data point on Bill Mitchell's engine builds.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
http://www.flatoutgroup.com/gaskets/AM.asp
The .021 coppers is what i've been using in my last 2-3 motors.
As for pistons. 4.250 bore small blocks is not very common. I couldn't find any on the Wiseco site.
The .021 coppers is what i've been using in my last 2-3 motors.
As for pistons. 4.250 bore small blocks is not very common. I couldn't find any on the Wiseco site.
