<div class='quotetop'>QUOTE(motoxlifer @ Oct 16 2006, 10:19 PM) [snapback]69842[/snapback]</div>I think they have the 1.890 intake and 1.55 exhaust. 4.8/ 5.3.So your saying that the 5.3's have small valves. I thought they had 2.00/1.55's, I thought it was just the 4.8's that had small valves.
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6.0L , LS1, and I think the LS2 have the 2.0 intake and 1.55 Exhaust. If I am wrong someone please correct me so I will know in the future.
Jamest
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La Viuda negra/ a.k.a. Black Betty
LQ4 6.0L, WCCH HEADS, LEVEL 5 FLT 4L80E TRANS. WITH TRANS BREAK, YANK 3200 STALL, TRICK TURBO, TURBONETICS T-76 TURBO, CUSTOM INTERCOOLED, 68lb INJECTORS, CUSTOM S/D TUNE FROM NELSON PERFORMANCE, COMP CAM 212/214 .557/.559 116+2, SNOW METH. KIT, . ALL INSTALLED AND DYNOED AT NELSON PERFORMANCE: 5**?HP @ 5073rpms and 5**TQ @ 4389rpms AT THE WHEELS WITH 10 PSI OF BOOST. ALL 3/4 TON TRUCK 5435LBS, NOTHING TAKEN OFF, STREET TIRES, AND USUALLY 2 BABY SEATS. WANNA RIDE?
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<div class='quotetop'>QUOTE(Hit Man X @ Oct 20 2006, 02:51 AM) [snapback]70379[/snapback]</div>was i wrong the way i said it or am i misreading what YOU said?? just asking so i can be correctedWhen CC vol decreases, compression rises.
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2000scsb silverado, '02 5.3L with Comp Cams custom ground LS1 cam 222/224 112lsa +2deg. 581/581 , '01 LS1 heads decked 0.010" ported, Comp beehive valvesprings, pushrods, shims, pace setter longtubes, no cats, Nelson tuned. AuburnGear Pro series LSD, 4L60E built with 2k rpm stall, corvette servos and raybestos clutches..... Fun enough...... for now
<div class='quotetop'>QUOTE(Chris Ryan @ Oct 20 2006, 06:46 PM) [snapback]70445[/snapback]</div>was i wrong the way i said it or am i misreading what YOU said?? just asking so i can be corrected
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You shaved your heads 0.010... your compression rose.
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
GOt ya, I've always been told that the LS1's had bigger combustion chambers of course, therefore applying those to 5.3's would lower the compression. Any idea what the compression would be with my setup? That of which being 5.3 with ls1 heads and 0.010 deck
2000scsb silverado, '02 5.3L with Comp Cams custom ground LS1 cam 222/224 112lsa +2deg. 581/581 , '01 LS1 heads decked 0.010" ported, Comp beehive valvesprings, pushrods, shims, pace setter longtubes, no cats, Nelson tuned. AuburnGear Pro series LSD, 4L60E built with 2k rpm stall, corvette servos and raybestos clutches..... Fun enough...... for now
<div class='quotetop'>QUOTE(Chris Ryan @ Oct 20 2006, 11:39 PM) [snapback]70500[/snapback]</div>GOt ya, I've always been told that the LS1's had bigger combustion chambers of course, therefore applying those to 5.3's would lower the compression. Any idea what the compression would be with my setup? That of which being 5.3 with ls1 heads and 0.010 deck
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Ah yes, 5.7 LS1 heads have what... a 67cc chamber and I think 4.8/5.3 have about a 62cc. Actually your compression probably dropped, even with 0.010 removed. And hurt midrange torque as the intake valve are too large now.
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
LS1 heads are 66.67cc with 2.00 and 1.55 valves
5.3L truck heads 61.15cc with 1.89 and 1.55 valves
Sounds like the 5.3 head would be better with a little bigger intake valve.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
<div class='quotetop'>QUOTE(RedHeartbeat @ Oct 21 2006, 08:54 AM) [snapback]70515[/snapback]</div>LS1 heads are 66.67cc with 2.00 and 1.55 valves
5.3L truck heads 61.15cc with 1.89 and 1.55 valves
Sounds like the 5.3 head would be better with a little bigger intake valve.
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I wouldn't go larger with a 3.78" bore.
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
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