'58 Edsel's 361 (303 HP) Factory Claim Vs. Real Dyno Results

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Chris430
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Re: 1958 Ford Police 361

Post by Chris430 » Sat 4. Nov 2017, 08:48

Chris430 wrote:
Sun 20. Mar 2016, 16:47
Interesting article with car photos and engine specifications. I have a 332 from a 58 Ranch Wagon with machined chambers in the second link. I have sense learned from the FE forum the shim gaskets are 4cc bore volume.

http://www.network54.com/Forum/74182/th ... iew+Thread

http://www.network54.com/Forum/74182/thread/1450741454
Here is the information from the bad Photobucket pictures.
58 police interseptor engines.jpg
58 police interseptor engines.jpg (52.87 KiB) Viewed 76 times

Sheriff Wayne Collins.jpg
Sheriff Wayne Collins.jpg (39.27 KiB) Viewed 76 times
The car is his 1958 Ford Police Special. It was equipped with a 303 hp Police Interceptor Special V8 361 cubic inch.jpg
The car is his 1958 Ford Police Special. It was equipped with a 303 hp Police Interceptor Special V8 361 cubic inch.jpg (35.15 KiB) Viewed 76 times

Chris430
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Re: 1958 Ford Police 361

Post by Chris430 » Sat 4. Nov 2017, 09:09

Chris430 wrote:
Sun 20. Mar 2016, 16:47
Interesting article with car photos and engine specifications. I have a 332 from a 58 Ranch Wagon with machined chambers in the second link. I have sense learned from the FE forum the shim gaskets are 4cc bore volume.

http://www.network54.com/Forum/74182/th ... iew+Thread

http://www.network54.com/Forum/74182/thread/1450741454
Straight cut 58 332 head and the 59 Thunderbird head with the unshrouded exhaust valve. I have seen three different 58 Thunderbird 352's with this combustion chamber shape. My 2v 332 and Thunderbird 352 were both 74.5 cc's.


Five 1958 332 2 barrel photos:
KIMG0200.jpg
KIMG0200.jpg (57.89 KiB) Viewed 75 times

KIMG0198.jpg
KIMG0198.jpg (46.43 KiB) Viewed 75 times

KIMG0197.jpg
KIMG0197.jpg (47.18 KiB) Viewed 75 times

KIMG0196.jpg
KIMG0196.jpg (61.31 KiB) Viewed 75 times

KIMG0195.jpg
KIMG0195.jpg (50.76 KiB) Viewed 75 times


Three 1958 Thunderbird 352 photos:
edc heads 003-1.jpg
edc heads 003-1.jpg (42.1 KiB) Viewed 75 times

edc heads 002.jpg
edc heads 002.jpg (29.85 KiB) Viewed 75 times

edc heads 001.jpg
edc heads 001.jpg (21.3 KiB) Viewed 75 times

WerbyFord
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Re: '58 Edsel's 361 (303 HP) Factory Claim Vs. Real Dyno Results

Post by WerbyFord » Sun 5. Nov 2017, 10:43

Interesting pics and spec sheet on the 361/303 in 58 Fairlane etc, even if police only.

On the Aug-Sep 1958 Hot Rod dyno session we should remember the following:
* The starting dyno test gets only 210hp vs 303hp as rated, and they kinda rag on the rating after that.

* That dyno test was pretty much a NET horsepower test ie like the "220 net hp" rating you'd see on a 1973 Ford 460, or "266 net hp" on a 1973 351CJ.

* That said, this was a tight, poorly tuned engine. Test #5 at 226hp is more like a stock, well tuned 361/303, but again more like 226 NET hp.

* The Gonkulator says a nominal bone stock 361/303 would make about 270 GROSS hp. Still shy compared to the 303 gross rating, which I think came from the original intended FE with its solid almost-390-police cam.

* The Gonkulator says this particular 361/303 was only making 256 gross hp (or 212 net hp) out of the crate so yes they started with a tired example.

* The bright side though is that when the series finished in Sep 58 with Dyno #30, they dyno the 414cid stroker at 342 hp but that's 342 NET hp, and about 402 GROSS hp per the Gonkulator. Those numbers are better than a 428cj.

* So it's a good article and a good engine, if properly interpreted!

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