Would anyone DCR/SCR of this combo?
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Joined: Jan 2004
Posts: 112
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From: OK
Car: TBI CHEVY, TPI 5.0 HO
Engine: 5.7 FIRST hp SMALL BLOCK, BIG BLOCKS!
Transmission: 4L60E
Would anyone DCR/SCR of this combo?
350-40 over using Fel Pro H345NP40 pistons, 76 cc Heads, Cam 12-402-4, 3.42 gears automatic.
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From: Nashville TN
Car: 1989 Trans Am
Engine: 355 HSR
Transmission: Pro-Built 700r4 w/ 3400 converter
Axle/Gears: 10 bolt w/ 3.42 gears
Tell me the cc's dish or dome on those pistons, your head gasket thickness, and bore, and seat to seat duration on that cam and I can figure it out for you w/ my DCR/SCR calculator.
Thread Starter
Member
Joined: Jan 2004
Posts: 112
Likes: 0
From: OK
Car: TBI CHEVY, TPI 5.0 HO
Engine: 5.7 FIRST hp SMALL BLOCK, BIG BLOCKS!
Transmission: 4L60E
Federal Mogul gave me this:
Bore Dia. 4.040
Compression Distance 1.560
Weight 552 grams
Dome Volume -5cc's
Dome shape Flat with 4 valve reliefs
Top Ring 5/64"
2nd ring 5/64"
Oil Ring 3/16
Pin Style Press
Bore Clearance .0010
Fel Pro 1094 gasket .015 with 76 cc heads shaved 20 thousandths. 40 quench I believe and just trying to get it running until I can get 400 crank/piston next year.
260-AH-14 Adv Duration 260-268
(Duration .050: 212-218 .050 Duration) Lift 444 Lift 444
Int: 20 BTDC 60 ABDC
Exh: 72 BBDC 16 ATDC
Bore Dia. 4.040
Compression Distance 1.560
Weight 552 grams
Dome Volume -5cc's
Dome shape Flat with 4 valve reliefs
Top Ring 5/64"
2nd ring 5/64"
Oil Ring 3/16
Pin Style Press
Bore Clearance .0010
Fel Pro 1094 gasket .015 with 76 cc heads shaved 20 thousandths. 40 quench I believe and just trying to get it running until I can get 400 crank/piston next year.
260-AH-14 Adv Duration 260-268
(Duration .050: 212-218 .050 Duration) Lift 444 Lift 444
Int: 20 BTDC 60 ABDC
Exh: 72 BBDC 16 ATDC
Last edited by 1993GMCPU; Mar 9, 2004 at 07:54 PM.
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iTrader: (2)
Joined: Feb 2002
Posts: 1,141
Likes: 0
From: Nashville TN
Car: 1989 Trans Am
Engine: 355 HSR
Transmission: Pro-Built 700r4 w/ 3400 converter
Axle/Gears: 10 bolt w/ 3.42 gears
Static Compression Ratio is coming up as 9.1681:1
Dynamic Compression Ratio is 7.60211:1
That is using what you have provided me. Seems about right for the 76 cc chambers.
Dynamic Compression Ratio is 7.60211:1
That is using what you have provided me. Seems about right for the 76 cc chambers.
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