CRG Discussion Forum
Camaro Research Group Discussion => Garage Talk => Topic started by: HustleRussell on February 09, 2018, 11:45:20 PM
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https://atlanta.craigslist.org/nat/cto/d/1969-chevrolet-impala-ss-lhp/6484387246.html
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I love those cars! I could never undertake a restoration like that, but the idea of a factory 427 L72 Impala 4-spd with no A/C is thrilling to me!
I had a 69 factory 427 Caprice automatic with hideaway headlights that was cool, but nothing like an L72 4-spd.
John
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Very cool car. That would be a great project.
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I saw it on ebay, I think it went to 10500.00. Very cool car!!
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I did not see any engine pics. Would be interesting. I thought I read someone the L72 solid lifter was not available for the 69 big cars.
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69 SS B-cars came in two 427 configurations only: 390hp and 425hp. NO A/C on 425hp versions. My brother has had a 390hp version for 30 years. Impressive for a big car. But the L72 would increase the fun factor by quite a bit.
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I “THINK” there might have been three.
http://www.impalass427.com/69engine.htm
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I “THINK” there might have been three.
http://www.impalass427.com/69engine.htm
I have a "LE" coded 335 horse version I found on craig's list a couple of years back. It is my understanding the only difference between it & the 390 horse version was the camshaft.
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I think it was Car Life magazine that did a test on a 69 L72 Impala pulling a big Airstream trailer. The goal was to hit 100mph (which they did).
John
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The pics in the link remind me of another post I made. I was wondering why a COPO would have chrome valve covers not being a SS. I think it was said that by 69 all big blocks got chrome but these pics look like they only did chrome on the SS big cars. I don,t remember seeing a 335 427. I wonder if the cam could derate HP that much or was it something else? The 390 HP cam sounds pretty mild to me.
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I would expect the valve covers would be specified as part of the discrete engine suffix, not related to the "SS" package.
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I'm pretty sure the 335 & 390 horse have the same compression, intake, heads etc.. so the only difference I see is in the cam shaft.
Here is a chart from Crane that shows the specs..
(https://s26.postimg.org/hjdcs9oqh/Screen_shot_2018-02-14_at_7.45.10_AM.png) (https://postimages.org/)
There is a pretty big difference between the two cams, I dont know if its 55 horse worth, but I guess anythings possible.. :)
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The specs for the 335 seem close to the 325hp 396.
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Also remember this, Chevrolet played around with the RPM that they used for horsepower and torque ratings. The numbers below are for 1969.
427/335 hp - the 335 hp was @ 4800 - Torque was 470 @ 3200 (10.25 compression)
427/390 hp - the 390 hp was @ 5200 - Torque was 460 @ 3600 (10.25 compression)
427/400 hp - the 400 hp was @ 5400 - Torque was 460 @ 3600 (10.25 compression)
427/425 hp - the 425 hp was @ 5600 - Torque was 460 @ 4000 (11.0 compression)
427/430 hp - the 430 hp was @ 5200 - Torque was 450 @ 4400 (12.0 compression and more timing)
427/435 hp - the 435 hp was @ 5800 - Torque was 460 @ 4000 (11.0 compression - 3x2 barrel carbs)