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#1
07-28-2020, 01:01 PM
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6X Heads
Does anyone know the chamber size of the 6X-4 and the 6X-8
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Tim Corcoran |
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#2
07-28-2020, 01:08 PM
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The shop measured my 6X-4 at 94 cc. I measured 90cc at home.
The shop measured my 6X-8 at 100cc. I wonder if my shop actually measures the chambers or looks up the codes for the info. Wallace racing has most of the info on their site. http://www.wallaceracing.com/headsearch.htm |
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#3
07-28-2020, 01:26 PM
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I've seen on average over the years 96 CCs for the -4s and 104 or so for the -8s, these have had a freshen up valve job already when I got my hands on them which accounts for the larger chamber size.
You should CC yours to find out where you are as you want to be within 3 CC of whatever you need to get to your target compression, as anything more then that and your off by 1/4 of a compression point.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#4
07-28-2020, 11:09 PM
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Quote:
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 466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#5
07-29-2020, 06:45 AM
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With very few exceptions all the -8's I've measured were right at 101cc.
Most -4's are 92cc, but I have measured what I was pretty sure were untouched -4's at 88cc and a couple pairs at 96cc......
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#6
07-29-2020, 07:04 AM
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As usual, there no better way to go then bitting the bullet and getting set up to CC your heads !
You can a plastic 100 cc buret for 30 bucks or less before shipping and then all you need is 5" X 5" scrap of plexiglass, some 70% ally and some wheel Bearing grease!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#7
07-29-2020, 10:39 AM
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Quote:
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#8
07-29-2020, 07:14 PM
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Quote:
__________________
466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#9
07-30-2020, 12:35 AM
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6X-8 = 98cc
6X-4 = 92cc These are "ballpark, as advertised" figures...always measure.
__________________
Just a blind squirrel looking for a nut. |
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#10
07-30-2020, 08:31 AM
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I have a pair of each that measure
6X-8 = 102 6X-4 = 94 |
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#11
07-30-2020, 09:38 AM
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Some 6x heads are well over 120cc you want to check them.
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#12
07-30-2020, 10:20 AM
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I don't know that I have ever seen that, as you may be thinking of the 6H castings that look externally like the 6Xs, but have 120 CCs.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#13
07-30-2020, 10:56 AM
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Te big BIG chambers heads are 7M5 and 66's, and the big 4X's are there any other HUGE chambers besides the 6H's?
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down...
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#14
07-30-2020, 12:15 PM
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There would have to be some 5 series 120+ CC heads for the 455 I would think also.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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