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#1
07-22-2002, 05:20 PM
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I was wondering if I could get a Guesstimate on a combo I am building. Here's what I have....
74 455 bored .030 over standard crank Lunati Bracket master II cam - 292/230 .490 110sep Performer intake 1 5/8 headers holley 750 vac sec HEI ignition compression ratio between 9.5:1 and 10:1 I haven't decided on the 6X-4, 96, 66, 5C or 15 heads, suggestions? Any help would be greatly appreciated!
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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#2
07-22-2002, 05:20 PM
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I was wondering if I could get a Guesstimate on a combo I am building. Here's what I have....
74 455 bored .030 over standard crank Lunati Bracket master II cam - 292/230 .490 110sep Performer intake 1 5/8 headers holley 750 vac sec HEI ignition compression ratio between 9.5:1 and 10:1 I haven't decided on the 6X-4, 96, 66, 5C or 15 heads, suggestions? Any help would be greatly appreciated!
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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#3
07-22-2002, 07:38 PM
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have you played with the simulated engine dyno at www.pontiacwarriors.com
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smokem if you got em |
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#4
07-22-2002, 08:01 PM
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For most people, about 460HP, but for you about 560HP if you use the 5C heads.
Nice Lunati cam.
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95 Towncar that needs more TQ. Sold 2023: 12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#5
07-23-2002, 11:13 AM
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Huh? Does that mean I get the extra 100 horses from the stickers? hehehe
5C heads, huh? I need to find some....
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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#6
07-23-2002, 11:15 AM
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That web page is unavailable.
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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#7
07-23-2002, 03:39 PM
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Quote:
 I wanted to see the difference between the Nunzi 2041 cam I am using now and his 2042, oh well I guess I must wait, was thinking of doing a quick switch before norwalk, But since I have not ran the car I could get a better idea of the change if I run it first with this one, Jim
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#8
07-23-2002, 05:59 PM
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I ran it through a program I have and guessed at a few things but came up withabout 450 hp gross and 340 net hp. Should run around 12.90 in a 3500lb. car.
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455: 1/8th mile 6.52 @ 104 1/4 mile 10.43 @ 128 |
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#9
07-24-2002, 07:04 AM
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How about a 455...60 over....#64 heads.....performer intake with Rochester quadrajet.....RA IV cam....dual point ignition....hedman hedders???? Horsepower??? Somebody told me that with those heads I'm up near 11:1 compression...any truth??
Thanks Roy |
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#10
07-24-2002, 09:41 AM
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How about a 455...60 over....#64 heads.....performer intake with Rochester quadrajet.....RA IV cam....dual point ignition....hedman hedders???? Horsepower??? Somebody told me that with those heads I'm up near 11:1 compression...any truth??
Thanks Roy Not sure on horsepower, but depending on what else you've done to the block and heads the CR shouldn't be that high. If they are 87cc heads, .060 overbore, standard stroke, standard 6.7 cc dish piston, deck height is .020, gasket thickness of .039, CR would be 9.97:1. If the heads or deck have been milled the CR can go up quickly.
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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#11
07-29-2002, 11:05 AM
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Minor changes....
It is a 71 block, standard bore and crank. Does that change the numbers much? It will be run through a 2.5 inch Flowmaster exhaust. Thanks! Drew
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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