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235 HP? #1256384 Sun Feb 25 2018 05:47 PM
Joined: Oct 2014
Posts: 92
J
jkvincent Offline OP
Shop Shark
Morning guys,
I'm doing up new (valve cover) decals for my newly overhauled 235.
What's the HP rating of my eng, (please)
I've seen others (see attachments for ref only, not my eng) but don't know if mine matches either of these HP's, I can't figure it out...

'53 235, full pressure, ser# prefix LAS, powerglide/power steering,
originally had "Hydraulics", now Solid lifters with matching Cam,
Cylinders bored to .040
(if any of that makes a big deal)

Thanks, Jim

Attached Files
reference a.jpg (106.12 KB, 235 downloads)
reference d.jpg (62.74 KB, 227 downloads)
Re: 235 HP? [Re: jkvincent] #1256390 Sun Feb 25 2018 06:37 PM
Joined: Dec 2017
Posts: 622
D
Dragsix Offline
Shop Shark
I will ask the question because I truly do not know the answer, but in all of the years I have been messing with the 235/261 motors (primarily late 54 through 62/63) I have never seen an original motor with its original paint still intact, that had a valve cover with a decal. To add more confusion, I have seen a couple of different versions of the decals over the years. Every decal on a valve cover I have seen has been on a repainted motor. Add to that is that there are quite a few photos, looks to be for the 59 model year, at a gm plant where they are unloading motors, both v8 and 6, and none of the 6 motors have a decal on the valve cover. So any thoughts on whether cars and trucks came with decals on the valve covers? Any photos of documented original motors with original paint with a valve cover decal or the remnants of one?


Mike
Re: 235 HP? [Re: jkvincent] #1256392 Sun Feb 25 2018 06:46 PM
Joined: Sep 2001
Posts: 29,288
tclederman Offline
Boltergeist
http://www.1954advance-design.com/chev-specs/1953-Chevrolet-t-and-c-ser.pdf

LAS = 1953 car with Powerglide & power steering
115 hp

The "Thrift King" 235 3-speed that year produced 108hp.
I do not know if it was a high pressure engine (like the Blue Flame), or a low pressure engine like the big-truck 235.

https://53classicchevy.com/1953-chevrolet-engine
http://chevy.oldcarmanualproject.com/chevyresto/53030.htm
http://chevy.oldcarmanualproject.com/chevyresto/53141.htm

Hotrod Lincoln and others might comment/speculate on hp of that engine with mechanical lifters and solid cam.



Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: 235 HP? [Re: jkvincent] #1256401 Sun Feb 25 2018 08:18 PM
Joined: Feb 2004
Posts: 19,671
H
Hotrod Lincoln Online
Boltergeist
Prior to the days of the muscle cars when manufacturers started telling outright lies about engine power to keep insurance companies from raising rates for the factory hot rods, published horsepower ratings tended to be very optimistic. Engines were HP rated on the dyno, with no accessories being powered- - - -not even a water pump! Definitely not a generator of any other engine-driven equipment. Regardless of what the advertised HP might be, I'd probably have a hard time seeing it on a dyno without the same kinds of fudge factors the factory was using. Slap any kind of decal you want on it- - - - -the true HP with the engine installed in the vehicle will be lower!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: 235 HP? [Re: jkvincent] #1256403 Sun Feb 25 2018 08:30 PM
Joined: Dec 2008
Posts: 1,360
P
panic Offline
Shop Shark
Not sure of your question. Do you want to identify it by its original decal? Or your individual engine's power?
The "rating" is not the actual power of the original engine, merely the number the factory chose to publish, tested under ideal circumstances (GM "Test 20" with controlled air temperature, and minimal accessories).
Your engine is not stock, and won't produce that number either.
There is no accurate method of projecting how much yours makes.

Re: 235 HP? [Re: jkvincent] #1256404 Sun Feb 25 2018 08:55 PM
Joined: Sep 2001
Posts: 29,288
tclederman Offline
Boltergeist
Jim,

Here are some choices for valve cover decal.
Most likely you will want want that "looks right" on a 1953 engine.

You will have to decide on the year style, and, car or truck style.

If you plan to paint it Blue Flame Blue, you might want "Blue Flame" and "125" for 1953/54 cars.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: 235 HP? [Re: jkvincent] #1256409 Sun Feb 25 2018 09:47 PM
Joined: Oct 2014
Posts: 92
J
jkvincent Offline OP
Shop Shark
Yea "tc",
Sorry for the confusion, guess I should have posted
only the first line in my engine description,
I don't care about whatever (if any) the cam and/or cyl bore adds)
I was just interested in what the original decal displayed.
It is painted "Blue Flame" blue....guess "125" is my answer,
thanks all,
Jim

Re: 235 HP? [Re: jkvincent] #1256410 Sun Feb 25 2018 09:57 PM
Joined: Mar 2005
Posts: 126
R
RdsLessTaken Offline
Shop Shark
The 115hp “Blue Flame” 235.5 engine in 1953 was full high-pressure oil system, with aluminum pistons, 7.5:1 compression ratio, Hydraulic valve lifters, and was used with the Powerglide transmission available only in the “Two-Ten” and Bel Air models.

The 108hp “Thrift King” engine in 1953 had 235.5 cu. Inch displacement, was low-pressure with four way-lubrication, had cast alloy iron pistons, lower compression ratio (7.1:1), solid valve lifters and was used with the manual shift transmission.



Attached Files
1953 Chevrolet-16.jpg (122.61 KB, 139 downloads)
Re: 235 HP? [Re: jkvincent] #1256416 Sun Feb 25 2018 11:01 PM
Joined: Sep 2001
Posts: 29,288
tclederman Offline
Boltergeist
Jim,

I'd also go with the Blue Flame (Six) 125hp, even though it was converted to a solid cam and lifters, it is still a 53 "high oil-pressure" 235 engine. I wonder if it has a mechanical-lifter car/truck 235 cam or a '53?/'54-'55 Corvette "261" cam?



Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: 235 HP? [Re: jkvincent] #1256504 Mon Feb 26 2018 05:54 PM
Joined: Jan 2005
Posts: 312
8
8trackdude Offline
Shop Shark
Just for fun, I went with the Corvette 235 decals. I figured that with all of the mods I have made to my engine, it should be putting out around the same power.


Attached Files
valvecover.jpg (82.38 KB, 65 downloads)

-Tim
'51 Chevy 3104 w/'56 235, 848 Head, HEI Dizzy, Corvette Cam, Split Manifold and Dual Carter YF's

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