Author Topic: Rare L72 69 Impala SS  (Read 1276 times)

1969Z27

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Russ 
68 RS LS6/M40
69 SS L48/MC1

Z28Project

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Re: Rare L72 69 Impala SS
« Reply #1 on: February 11, 2018, 02:09:47 AM »
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
John

69 Z/28 NOR 12B X33 H.O. 'Ex-Racer'

bcmiller

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Re: Rare L72 69 Impala SS
« Reply #2 on: February 11, 2018, 02:44:42 AM »
Very cool car.  That would be a great project. 
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Daytona Yellow 69 Z/28

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Re: Rare L72 69 Impala SS
« Reply #3 on: February 11, 2018, 03:00:45 PM »
I saw it on ebay, I think it went to 10500.00. Very cool car!!

Kelley W King

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Re: Rare L72 69 Impala SS
« Reply #4 on: February 12, 2018, 12:19:43 PM »
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.
69 Z28 RS Scuncio Hi Performance
69 SS L78
67 SS Chevelle
64 Corvette
66 GTO Tiger Gold
77 Trans Am Special Edition

Z10Mike

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Re: Rare L72 69 Impala SS
« Reply #5 on: February 12, 2018, 01:45:23 PM »
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.

bcmiller

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Re: Rare L72 69 Impala SS
« Reply #6 on: February 12, 2018, 04:33:14 PM »
I “THINK” there might have been three.

http://www.impalass427.com/69engine.htm
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Daytona Yellow 69 Z/28

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Re: Rare L72 69 Impala SS
« Reply #7 on: February 12, 2018, 04:39:40 PM »
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.

Z28Project

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Re: Rare L72 69 Impala SS
« Reply #8 on: February 14, 2018, 02:57:46 AM »
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
John

69 Z/28 NOR 12B X33 H.O. 'Ex-Racer'

Kelley W King

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Re: Rare L72 69 Impala SS
« Reply #9 on: February 14, 2018, 12:43:40 PM »
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.
69 Z28 RS Scuncio Hi Performance
69 SS L78
67 SS Chevelle
64 Corvette
66 GTO Tiger Gold
77 Trans Am Special Edition

Stingr69

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Re: Rare L72 69 Impala SS
« Reply #10 on: February 14, 2018, 02:31:21 PM »
I would expect the valve covers would be specified as part of the discrete engine suffix, not related to the "SS" package. 

Daytona Yellow 69 Z/28

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Re: Rare L72 69 Impala SS
« Reply #11 on: February 14, 2018, 02:58:28 PM »
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..



There is a pretty big difference between the two cams, I dont know if its 55 horse worth, but I guess anythings possible..   :)

maroman

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Re: Rare L72 69 Impala SS
« Reply #12 on: February 14, 2018, 03:16:30 PM »
The specs for the 335 seem close to the 325hp 396.
Doug  '67 RS/SS 396 auto I know the car since new

bcmiller

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Re: Rare L72 69 Impala SS
« Reply #13 on: February 14, 2018, 06:14:12 PM »
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)

Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016