high compression or low compression engine...
04-19-2005, 10:08 AM
#8
You sure about that? I think only a select few muscle car engines could actually run that high of compression back then
Originally Posted by rmurdoch
Yes it is 10.0 to one which is reasonably high. The muscle cars in the late 60s/early 70s were only about 10.25 or 10.5 to 1 on average.
04-19-2005, 10:11 AM
#9
Originally Posted by 2 Da Max
my boys LSVtec puts out 12.5 to 1, now thats high compressoin homie. then again max hp on that motor reaches @9k rpm so its pretty useless
(always good for a laugh)
04-19-2005, 10:59 AM
#10
Mopar compression
Originally Posted by Jeff92se
You sure about that? I think only a select few muscle car engines could actually run that high of compression back then
04-19-2005, 11:01 AM
#11
I was guessing the hemi could run the high comp because of the head design. Could the others from the big 3 do that also? I think most makers had their select hp V8s that ran high compression. I just couldn't remember how common it was.
Originally Posted by Chief Brody
Just whipped out my Cuda book (used to have one). 1970 Mopar 383 and 340 had 10.5 to 1, while the Hemi had 10.25 to 1. There were also 9 different engines available for the 1970 barracuda. Amazing stuff. So I don't think high compression was that rare back in the muscle car heyday.
04-19-2005, 11:06 AM
#12
I only know a bit about Mopars. They were still using leaded gas to help with resisting knock too. After 1971, forget it though, all makes got much tamer.
So yeah, the Maxima has 'spectable compression. It amazing me how well it holds up under boost considering this fact as well.
So yeah, the Maxima has 'spectable compression. It amazing me how well it holds up under boost considering this fact as well.
04-19-2005, 11:41 AM
#14
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VQ30DE=10.0:1
VQ35DE=10.3:1
And yeah, it is surprising how well the VQ handles boost/nitrous when well tuned. More than enough to make you wish it weren't unequal length axel FWD.
VQ35DE=10.3:1
And yeah, it is surprising how well the VQ handles boost/nitrous when well tuned. More than enough to make you wish it weren't unequal length axel FWD.
for the VQ CR's.
'70 SS Chevelle
04-19-2005, 02:44 PM
#16
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The CR on my dad's 1973 Trans Am is 13:1 
Yeah muscle cars had high comp originally. Gas was way better back then. It was **** cheap, too.
Then we all know what happened. The mid 70's to late 80's mostly sucked for cars.
Yeah muscle cars had high comp originally. Gas was way better back then. It was **** cheap, too.
Then we all know what happened. The mid 70's to late 80's mostly sucked for cars.
04-25-2005, 12:05 PM
#18
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My dad's 1967, 2-door Mustang sedan, came with a 390 cu. in. engine rated at 320 hp. Its compression ratio was at least 10.25 to 1. The highest gas mileage it ever got on the highway was about 13.5 miles to a US gallon and under 12 was routine. Mind you I used to drive it like I stole it.
Originally Posted by Jeff92se
You sure about that?
to jime for renting an 04+ and taking it to the track, and also, beating the bejessusz out of his LEASED 02 with N20. 
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