'67 Turnpike compression
#1
'67 Turnpike compression
Was the compression 10.50:1 like the 442, or lower (9.0:1) as in '68-69? If the higher compression, was the only difference the intake and carb on this engine?
#2
Compression on that year was defined by the piston - the deeper the dish, the lower the compression.
You can get a thicker head gasket to lower the compression - custom thickness can even lower it 1-2 points, but can be costly.
You can get a thicker head gasket to lower the compression - custom thickness can even lower it 1-2 points, but can be costly.
#4
I think so, [10.5] but only about 80% sure.
I had a '73 Buick SX w/ a 2bbl. and was told it was the only difference, but that was after they dropped ALL compression ratios.
You'd get better MPG and performance with the Q-Jet, as the primaries are smaller than the 2-bbl., and then you've the secondaries - if you can keep your foot out of it!!
BTW - the rear end ratios were in the mid 2's - great on the hwgy, but not too good for the 'stoplight drags'.
I had a '73 Buick SX w/ a 2bbl. and was told it was the only difference, but that was after they dropped ALL compression ratios.
You'd get better MPG and performance with the Q-Jet, as the primaries are smaller than the 2-bbl., and then you've the secondaries - if you can keep your foot out of it!!
BTW - the rear end ratios were in the mid 2's - great on the hwgy, but not too good for the 'stoplight drags'.
Last edited by Rickman48; April 27th, 2011 at 10:02 AM.
#6
I woud think it is a T/pike Cruiser athough a build sheet would confirm it, obviously.
I don't remember any markings, either inside or out making a designation, athough a rear-end ratio would confirm it a little more.
It was a little known option, except for 'rumrunners'!!
I don't remember any markings, either inside or out making a designation, athough a rear-end ratio would confirm it a little more.
It was a little known option, except for 'rumrunners'!!
#7
#8
400ci 2bbl had 10.5:1 in 1967
http://www.carnut.com/specs/gen/olds60.html
I have no idea how accurate this sight is
http://www.carnut.com/specs/gen/olds60.html
I have no idea how accurate this sight is
#9
Yo guys this info is in the factory specs at Wild About Cars at http://wildaboutcarsonline.com/membe..._Section_0.pdf
PS, it was the same as the regular 442 @ 10.5:1
Never speculate - use quality reference materials. That's what WAC is all about.
PS, it was the same as the regular 442 @ 10.5:1
Never speculate - use quality reference materials. That's what WAC is all about.
Last edited by jrzybob442; April 27th, 2011 at 12:40 PM. Reason: forgot line
#11
Hope all of you guys join up at WAC - there is a lot of info out there that one can use. When you do, click on the "Latest Uploads" button on the upper left - in your dashboard and you will see a listing of all the new stuff we've uploaded. We add stuff each day and have just topped the 25,000 pages of info mark this week!
www.wildaboutcars.com click on "Register".
www.wildaboutcars.com click on "Register".
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