Iron vs aluminum block: Lifting heads
12-17-2006, 09:17 PM
#1
Iron vs aluminum block: Lifting heads How much better are the iron blocks holding down heads with some boost? I've talked to a couple people and they say the oversized head studs are a good idea for the aluminum blocks. What would be best things to do to an aluminum block and an iron block for 20-25 pounds of boost?
12-18-2006, 07:15 PM
#4
TECH Enthusiast
iTrader: (16)
Join Date: Nov 2004
Location: Birmingham, AL
Posts: 577
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Phil99vette
What would be best things to do to an aluminum block and an iron block for 20-25 pounds of boost?
12-18-2006, 08:43 PM
#6
TECH Fanatic
iTrader: (1)
Join Date: Jun 2003
Location: Mount Dora, Fla
Posts: 1,876
Likes: 0
Received 0 Likes
on
0 Posts
eirk@hkracingengines.com is building a 408 for me and he says guys comb the junk yards for the old blocks, presumably for the long bolts.
Trending Topics
12-19-2006, 08:08 AM
#8
TECH Senior Member
Join Date: Nov 2001
Posts: 10,341
Likes: 0
Received 0 Likes
on
0 Posts
Its not only the heads lifting you have to worry about with alum but the block distorting as well. You'll require seasonal or every other season rebuilds (hone/rings) with the alum from block distortion and ring/cylinder wear.
Iron wont have the same problem in this respect. As for the heads look at a thicker deck design like AFR, DART, ETP etc.
Iron wont have the same problem in this respect. As for the heads look at a thicker deck design like AFR, DART, ETP etc.
12-19-2006, 08:13 AM
#9
TECH Senior Member
iTrader: (15)
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Phil99vette
How much better are the iron blocks holding down heads with some boost? I've talked to a couple people and they say the oversized head studs are a good idea for the aluminum blocks. What would be best things to do to an aluminum block and an iron block for 20-25 pounds of boost?
12-19-2006, 08:15 AM
#10
TECH Senior Member
iTrader: (15)
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Phil99vette
Why do you like the long vs short head studs?
The older stuff was different lenghts and had deeper bolt holes.
12-19-2006, 08:28 AM
#11
As Chrispy said, the heads are a problem on either iron or aluminum blocks. The aftermarket thick deck heads are the way to go vs. factory heads.
We have aluminum blocks handleing that much boost after modifications just as well as the iron blocks.
Timing will have a greater affect on peak cylinder pressure than the boost in #'s.
We have aluminum blocks handleing that much boost after modifications just as well as the iron blocks.
Timing will have a greater affect on peak cylinder pressure than the boost in #'s.
