SCR, DCR, flycutting???
Thread Starter
Joined: Dec 2007
Posts: 1,885
Likes: 1
From: Southern California
SCR, DCR, flycutting??? I have input all of my info for my upcoming head and cam swap into the DCR/SCR calculator. How does this look and have I missed anything?
Measurements are using PRC stg 2.5 5.3l heads w/ 62cc chambers with a TSP 228R 228/228 .588/.588 112+2 on stock ls1 shortblock.
@0.050
Int Dur:228
Exh Dur:228
LSA:112
ICL:108
IVO:6
IVC:42
EVO:50
EVC:-2
ECL:116
Overlap:4
Bore:3.9
Stroke:3.622
Rod Length:6.098
Cylinders:8
Deck Height:-0.006???I read at one point that it is +.005 stock??
Piston dome:0
Comp head gask thick:0.045
Cyl Head volume:62cc
[B]Static Compression Ratio=11.18:1
Dynamic Compression Ratio=8.55:1
Rod to stroke length=1.68:1
Bore to stroke length=1.08:1[B]
With this setup will I need to flycut the pistons?Is my DCR ok for 91 octane(California) pump gas?Is that deck height correct?
I really appreciate the help...my first Head and cam swap and im trying to get it right the first time...Thanks again!
Measurements are using PRC stg 2.5 5.3l heads w/ 62cc chambers with a TSP 228R 228/228 .588/.588 112+2 on stock ls1 shortblock.
@0.050
Int Dur:228
Exh Dur:228
LSA:112
ICL:108
IVO:6
IVC:42
EVO:50
EVC:-2
ECL:116
Overlap:4
Bore:3.9
Stroke:3.622
Rod Length:6.098
Cylinders:8
Deck Height:-0.006???I read at one point that it is +.005 stock??
Piston dome:0
Comp head gask thick:0.045
Cyl Head volume:62cc
[B]Static Compression Ratio=11.18:1
Dynamic Compression Ratio=8.55:1
Rod to stroke length=1.68:1
Bore to stroke length=1.08:1[B]
With this setup will I need to flycut the pistons?Is my DCR ok for 91 octane(California) pump gas?Is that deck height correct?
I really appreciate the help...my first Head and cam swap and im trying to get it right the first time...Thanks again!
Thread Starter
Joined: Dec 2007
Posts: 1,885
Likes: 1
From: Southern California
With a .040 Cometic the DCR was too high...8.6 and lower is reccomended for 93 octane and Im in california and only have 91!...witht the .040 the DCR was just way too high. Thanks for the advice!I really appreciate it!
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