jenkins71
Well-Known Member
Hi guys-- as some of you may see on my other threads, I am rebuilding my 440 for my Charger. My intended use is as a cruiser with maybe an occasional trip to the strip.
I want good low-mid range power, am okay with some rough idle characteristics, and as much gas mileage as I can get (I know it won't be much with a 440).
I am thinking about build options and considering budget vs. compression ratio.
I will be using a head gasket with .045 compressed thickness.
Using the components I have, I.E. my current .030 over bore, my 452 unmilled heads (yes I have cc'ed them), and my L2266 flat top pistons (with new rings and bearings, my bore taper is well within spec, just needs a hone), my stats are as follows, with careful measurements:
CURRENT SET UP
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 96cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 7.97 : 1
Obviously pretty dismal compression ratio.
So, in considering the longevity of this rebuild, combined with upping my compression and considering budget, I have come up with a few options.
___________________________________________________________________________
OPTION 1: Swap 452 heads for a pair of 915 heads from Aerohead Racing.
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 78cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 9.08 : 1
$600 Aerohead 915's, loaded
$0 re-use pistons
$100 hone job
TOTAL: $700
___________________________________________________________________________
OPTION 2: Mill current 452 heads .040 to lower cylinder head cc's to an estimated 86.48cc
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 86.48cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 8.49 : 1
$120 Head Mill
$100 Hone job
$220
___________________________________________________________________________
OPTION 3: Change to Aerohead 915, bore an extra .010 to reach a .040 oversize bore, fit a set of TRW "9.5:1" forged piston/rod balanced set found on craigslist for $250
Estimated compression ratio: 9.5 : 1
$600 Aeroheads
$250 bore and hone
$250 second hand piston/rod set
$1100
I want good low-mid range power, am okay with some rough idle characteristics, and as much gas mileage as I can get (I know it won't be much with a 440).
I am thinking about build options and considering budget vs. compression ratio.
I will be using a head gasket with .045 compressed thickness.
Using the components I have, I.E. my current .030 over bore, my 452 unmilled heads (yes I have cc'ed them), and my L2266 flat top pistons (with new rings and bearings, my bore taper is well within spec, just needs a hone), my stats are as follows, with careful measurements:
CURRENT SET UP
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 96cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 7.97 : 1
Obviously pretty dismal compression ratio.
So, in considering the longevity of this rebuild, combined with upping my compression and considering budget, I have come up with a few options.
___________________________________________________________________________
OPTION 1: Swap 452 heads for a pair of 915 heads from Aerohead Racing.
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 78cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 9.08 : 1
$600 Aerohead 915's, loaded
$0 re-use pistons
$100 hone job
TOTAL: $700
___________________________________________________________________________
OPTION 2: Mill current 452 heads .040 to lower cylinder head cc's to an estimated 86.48cc
Bore: 4.35
Stroke: 3.75
Cylinder Head Volume: 86.48cc
Deck Clearance: .0991
Compressed Gasket Thickness: .045
Compression Ratio : 8.49 : 1
$120 Head Mill
$100 Hone job
$220
___________________________________________________________________________
OPTION 3: Change to Aerohead 915, bore an extra .010 to reach a .040 oversize bore, fit a set of TRW "9.5:1" forged piston/rod balanced set found on craigslist for $250
Estimated compression ratio: 9.5 : 1
$600 Aeroheads
$250 bore and hone
$250 second hand piston/rod set
$1100
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