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Author Topic: x33  (Read 6948 times)

Z10 Paceman

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x33
« on: October 01, 2014, 01:23:22 AM »
Were all 1969  x33 cars Z28's. My friend has a x33 he said it is a z28 that was ordered with a 307 4speed with 12 rear end. I have never heard of this I thought all z28's were 302
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ko-lek-tor

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Re: x33
« Reply #1 on: October 01, 2014, 01:37:26 AM »
Quote from: Z10 Paceman on October 01, 2014, 01:23:22 AM
Were all 1969  x33 cars Z28's. My friend has a x33 he said it is a z28 that was ordered with a 307 4speed with 12 rear end. I have never heard of this I thought all z28's were 302
Rest assured, all X33 cars are Z28s and had only one drivetrain-302 4spd-12bolt rear. Generally the 12 bolts were 3.73 or 4.10. trans could be close or wide ratio. Look in the site under 1969 and it spells it all out. http://www.camaros.org/diffs69.shtml
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Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13

x77-69z28

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Re: x33
« Reply #2 on: October 01, 2014, 01:42:07 AM »
If his 302 was .30 over, it would be a 307!
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69 Z/28 X77 burnished brown, 711 int 05A bought in 78
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
15 z/28 Arctic white, A/C 505 HP #251

ko-lek-tor

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Re: x33
« Reply #3 on: October 01, 2014, 02:52:21 AM »
Quote from: x77-69z28 on October 01, 2014, 01:42:07 AM
If his 302 was .30 over, it would be a 307!
it would be .030 and at .060 over it would come up to 310.55 or 311 cu. .030 would only be 306 cu. .040=307 Sorry to get so precise there Buddy.
« Last Edit: October 01, 2014, 03:23:44 AM by ko-lek-tor »
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Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13

69Z28-RS

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Re: x33
« Reply #4 on: October 01, 2014, 03:23:01 AM »
Quote from: x77-69z28 on October 01, 2014, 01:42:07 AM
If his 302 was .30 over, it would be a 307!

Maybe..  but it wasn't ordered from the factory that way.. :)
A 302 bored 0.030 is close to 307 ci, but it is NOT anything close to the same as a Chevy 307~  :)

PS. Grizzly bears and rabbits are both brown haired animals, but one doesn't confuse the two ..:)      
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x66 714

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Re: x33
« Reply #5 on: October 01, 2014, 11:11:46 AM »
Correct me if I'm wrong here but I thought the standard bore 302 was actually 301.74 which when bored .030 still made it legal for SCCA ruling of 5.0L. Maybe 5.0L is a little looser term than actual cubic inches...Joe
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See America's First, Chevrolet

1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968 pnt OO. Purchased March 1976
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969 pnt 76E. Purchased April 1981

69Z28-RS

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Re: x33
« Reply #6 on: October 01, 2014, 01:37:25 PM »
A V8 with 4.030 bore and 3 " stroke comes out to slightly above 306 ci.   If I recall correctly, the 'best of the TA teams " (ie. Pennske) used special pistons that were around 0.020" over bored to get under the 305 max ci (at least that was what was reported).. :)      I'm sure they did whatever they could get by with.. :)
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09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

x77-69z28

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Re: x33
« Reply #7 on: October 01, 2014, 03:03:01 PM »
Boy, I'm sorry I started THAT!
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69 Z/28 X77 burnished brown, 711 int 05A bought in 78
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
15 z/28 Arctic white, A/C 505 HP #251

ko-lek-tor

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Re: x33
« Reply #8 on: October 01, 2014, 04:08:32 PM »
Quote from: x77-69z28 on October 01, 2014, 03:03:01 PM
Boy, I'm sorry I started THAT!

Sorry Buddy, No slam on you intended, but it was informative and all is good. Thank you for getting us thinking.
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Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13

x66 714

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Re: x33
« Reply #9 on: October 01, 2014, 11:00:09 PM »
For sure. It's all good. That's how we learn....Thanks, Joe
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See America's First, Chevrolet

1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968 pnt OO. Purchased March 1976
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969 pnt 76E. Purchased April 1981

x77-69z28

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Re: x33
« Reply #10 on: October 02, 2014, 04:44:26 AM »
All good! A little tongue in cheek!
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69 Z/28 X77 burnished brown, 711 int 05A bought in 78
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
15 z/28 Arctic white, A/C 505 HP #251
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