Tag Archives: Monte Carlo

1971 Chevy Engine Line-Up Part II – The 454

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One of my regular readers, Bill, posted the following question in response to the piece I wrote on Chevy engines.   Bill asked…

“No 454 V8 in 1971? I guess that motor came later. ..”

That get me to thinking so I did a little more research.  The references I’m use are “Ultimate American V-8 Engine Data Book” by Peter Sessler; “Standard catalog of American Cars” by John Gunnel and “110 years of the American Auto” by  James Flammang and Auto Editors of Consumer Guide.  I try not to get too much from the Internet at large.

Interestingly enough the 454 is briefly mentioned in the Ultimate American V-8 Engine Data Book, but there aren’t many details.  That reference shows that the 454 was available in 1971 as a 4V producing 365 horse power.  It doesn’t show under any model just as a general option for Chevy’s.  I’m assuming it was just a 400 block with a different bore and stroke.

The 454 was developed by 1970.  It’s bore was 4.251 in and had a 4 inch stroke (where as the 400 had 4.251 in bore and a 3.75 stroke).  There were other version in 1970 and 1971, designated as the LS5.  This version of the 454 was used in the 1970 and beyond in Corvette for one instance and was used in Chevelle.

Interesting that it isn’t referred to in the mentioned references for 1971 year.

Hold the presses!!!!!

It appears that in the reference “Standard catalog of American Cars” by John Gunnel that the 454 was left out off the comprehensive listing of engines for 1971.  However, the 454 was use in the SS version of the Monte Carlo – 1,919 were produced.  For the Chevelle 80,000 were sold with the SS badge of those only 19,992 were with the 454.

1917 Chevelle SS 454

 

 

1971 Monte Carlo SS 454

 

And in this reference I found the answer to a question I’ve had for some time.  About 5 years agoing I was at a car show and ended up talking to a guy with a 1971 Nova SS.  It had a 454 as the power plant between the shock towers.  However there were 7,015 Nova SS packages sold, none had the 454 as the option.

Thanks for the spark to follow this up Bill.

Thanks for reading.

Tim

Engine Line-UP: Chevy Engines 1971

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If you read any of my pieces on Engines, you’ll know that I enjoy learning all I can about the various makers’ details on their features.  I thought that I might start a series that took a year by year approach to what the US automaker build and used in the cars they produced.

So here is the engine line up for the 1971 Chevys.

 

Of course Chevy had the V8’s in 1971, not yet strangled by smog control, as well as 6 cylinders and 4 cylinders.

All of the 6’s were inline (often referred to as straight 6 – for the pistons all being in a straight line configuration) these were 250 cubic inch displacements – (very similar to the Ford 250, with the exception of the Blue upping the compression to 9.1:1 vs Chevy’s 8.5:1).  These were cast iron with hp running about 145 with hydraulic lifter,  and normally topped with a Rochester one barrel carb.  Any car that had a 6 in it had this engine and it was an option with most any Chevy model.

 

1971 Chev Inline Six (this one is in a Chevy Nova)

Next up is the 4 cylinder used exclusively in the Vega (remember those?). They were inline 4’s with Over head Cams, aluminum block (not iron) and managed to displace 140 cubic inches.  The compression ratio was less than they 6 at 8.0:1 with hydraulic lifters and a one barrel carb.

Vega Four Cylinder

There were 3 basic V8 that year the 350, 400 and the 307.

The 350 cid was cast iron with overhead valves and compression ratio of 8.5:1 with an hp of 245 hp when it was topped with a 2 barrel Rochester carb.  These were widely used in the Biscayne, Bel Air, Impala, and Monte Carlo.

The 400 was cast iron as well with matching stats.  However due to the larger bore  (4.125 vs the 4.00 for the 350) and longer stroke (3.75 inches compare to the 350’s 3.48) it was able to push the hp’s up to 255 (umm..seems like a lot of work for 5 hps) when it was topped with the same 2 barrel carb.

The 307 rounds this out  with its cast iron block and over head valves, it to had the compression ratio of 8.5:1 but with a smaller bore and shorter stroke  (3.875 and 3.5 inch)it bu down roughly 200 hp.  The 307 was used in Chevelle, Malibu, Nova and the Camaro.

 

Thanks for reading.

Tim

Closure Missing 1970 Mustang Grande

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OK after all these years, after the car was gone.  I stopped by the house.  I was met by Al, short for Albert, not Alan, as Al informed me.

I told him that I had always wanted to check on the Grande and he informed I was a bit late.  He said he didn’t mind answers a few questions.

So I asked Al how got the car and he said he bought it back in 1972 from some guy.  “It was a nice car with an automatic.”  Of course my next question was what was under the hood and he said ‘nothing’.  “Took it out about 10 years ago and parked on the side of the house.”  He told me he never got the engine fixed, ” ’cause  it ‘cost too much.”  He ended up letting the guy that did some work on it keep.  “Ya know, it might have been a 302.”  He said he didn’t really know want to do with the body and just ended up hanging on to it.

So I asked him where the car end up, hoping it was sent out to be restored.  He said there was this guy from Texas that would stop by every now and then and ask if it was for sale.  He drives large pick up and always has an empty trailer attached.  This same guy that has stopped by a co-worker of mine, who has her son’s 70 Monte Carlo and her daughter’s 1969 Camaro sitting under her car port – waiting for some TLC and try’s to convince her that she should sell them to him.  She chases him off each time, but he’ll swing by a few months later.

A couple of weeks ago, Texas dude, stops by Al’s home and Al decided to get the Grande out of the yard and sold the man from Texas.

We talked a bit longer about my 1970 Mustang coupe and I showed him a couple of pics on my phone and then thanked him for his time.

There ya go..closure!

Thanks for reading.

Tim