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#1
05-21-2003, 10:30 AM
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present combo-mainy street/some occasional strip use-455-being torn down today or tomorrow-hopefully just honed&ringed-motor currently has 4x heads-have 3 other choices of heads to use(1)061 heads(400)-(2)31 heads(400)-(3)6x-4 heads from 1977 350-other parts include hs 1.65rockers,crower60916 cam,tru roller timing chain,gear-torker2 intake-750 dp holley-accell ign,crane hd valve springs and retainers,ferrera valvesall heads will have to be rebuit-need to run pump gas-headman 3 tube headers-4-speed-3.36posi budjet is about gone-cheapest and best combo-cant spend 800to 1200 for porting,just home job-help most appreciated?!!!!!!
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#2
05-21-2003, 10:30 AM
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present combo-mainy street/some occasional strip use-455-being torn down today or tomorrow-hopefully just honed&ringed-motor currently has 4x heads-have 3 other choices of heads to use(1)061 heads(400)-(2)31 heads(400)-(3)6x-4 heads from 1977 350-other parts include hs 1.65rockers,crower60916 cam,tru roller timing chain,gear-torker2 intake-750 dp holley-accell ign,crane hd valve springs and retainers,ferrera valvesall heads will have to be rebuit-need to run pump gas-headman 3 tube headers-4-speed-3.36posi budjet is about gone-cheapest and best combo-cant spend 800to 1200 for porting,just home job-help most appreciated?!!!!!!
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#3
05-21-2003, 05:15 PM
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Use the 6X-4 heads since the others will need dished pistons to run pump gas. Even the 6X-4 may be marginal on pump gas, some have success and others don't running those heads on a 455.
If it was my 455 I would want the 6X-8 heads, mostly because here in So Cal we only get 91 octane premium.  Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#4
05-21-2003, 06:53 PM
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Hey B-Man what would a set of 6X-8s at 98 CC's on a .30 over 455 have for compression??
9.5-1?? Mike |
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#5
05-21-2003, 07:11 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by LouisianaGuy:
Hey B-Man what would a set of 6X-8s at 98 CC's on a .30 over 455 have for compression?? 9.5-1?? Mike<HR></BLOCKQUOTE> On a zero-deck 455 +.030 assuming a 10cc gasket, 7cc piston valve relief and a 1cc ring area I get 9.16:1.  Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#6
05-21-2003, 08:26 PM
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thanks b-man that was what iwas leanin toward-hoprfully this project will finally get sorted out after many unforseeable snags!!! help much appreciated!!!!!!!!
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#7
05-21-2003, 11:08 PM
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Man am i glad i didnt have the 114CC heads, but still i have 104 CC's so im still low on the compression end.
Think im gona mill them .40 more and get them to 98CCs. Mike |
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