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The humbling dyno

 
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chevymad
Master B


Joined: 11 Jan 2004
Posts: 5472


1987 Pontiac Formula

PostPosted: Sat May 07, 2016 4:44 pm    Post subject: The humbling dyno Reply with quote

This is an old article but it shows how modern dyno's can humble your expectations. Actually.. these numbers really make me feel good about my combo. I mean my old little 327 combo is only 55hp less then an ls6!

http://www.superchevy.com/how-to/additional-tech/sucp-1102-chevrolet-muscle-car-dyno-wars/
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Dewey316
The Lama


Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Sun May 08, 2016 8:10 am    Post subject: Reply with quote

That is pretty interesting to see those numbers. Big boost in ego for what I did to that little 305!
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QwkTrip
11sec Club


Joined: 17 Feb 2004
Posts: 3942
Location: Peoria, IL

1989 Pontiac Firebird

PostPosted: Sun May 08, 2016 9:34 am    Post subject: Reply with quote

The V6 in my truck blows away the Chevelle 454 in horsepower and torque. Laughing
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun May 08, 2016 9:41 am    Post subject: Reply with quote

Solid ninja-edit there, Jon. Wink

Gross power is dumb, believing auto company claims is dumb, and BBC's are dumb as performance motors, so it makes sense to me.
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Twilightoptics
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Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun May 08, 2016 12:34 pm    Post subject: Reply with quote

Yuuuuuup. Poor little 283.
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chevymad
Master B


Joined: 11 Jan 2004
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1987 Pontiac Formula

PostPosted: Sun May 08, 2016 6:03 pm    Post subject: Reply with quote

Kinda interesting how it peaked at 4600. Wonder how much a cam change would jump that up?
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Alphius
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Joined: 05 Sep 2006
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Location: Grand Mound

1984 Chevrolet Camaro Z/28

PostPosted: Sun May 08, 2016 9:19 pm    Post subject: Reply with quote

Cuts right through those rose-tinted glasses so many people view that era through. We truly live in an amazing modern era of power.
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QwkTrip
11sec Club


Joined: 17 Feb 2004
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Location: Peoria, IL

1989 Pontiac Firebird

PostPosted: Sun May 08, 2016 10:27 pm    Post subject: Reply with quote

aaron_sK wrote:
Solid ninja-edit there, Jon. Wink


Ha! Ya, I thought it would get misinterpreted. Wink
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aaron_sK
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Joined: 23 Jan 2006
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Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Mon May 09, 2016 7:12 am    Post subject: Reply with quote

chevymad wrote:
Kinda interesting how it peaked at 4600. Wonder how much a cam change would jump that up?


I suspect not as much as it might seem. You still have poor heads, intake, carb design, and an old points distributor with a 50's-era curve in it.

Also consider the power loss from not having a PCV system on any of those engines.

I honestly think you'd see more power from that 283 with an air-gap, Holley VS, HEI and proper crankcase vent than you would with a cam.

All that said, at this point these engines still are used for the same reasons people still run Ford flatty eights in hotrods. To look cool and era-specific. They no longer serve a practical purpose, so judging them by their power is just rubbing salt in the old guy's wounds. Laughing
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Dewey316
The Lama


Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Mon May 09, 2016 7:31 am    Post subject: Reply with quote

It would take some work, but anytime you have a 4.250" bore, with the right parts, you have a ton of potential. I dunno, maybe I am a nostalgic geezer, but I do like seeing some properly built big blocks flying around.
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fiveoformula
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Joined: 08 Aug 2007
Posts: 1799
Location: OR

1988 Pontiac Formula

PostPosted: Mon May 09, 2016 3:56 pm    Post subject: Reply with quote

But still when the guy working at the gas station asks you how much power you have, and you respond with anything less than 400, he gives you the "that's all?" Look.
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chevymad
Master B


Joined: 11 Jan 2004
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1987 Pontiac Formula

PostPosted: Mon May 09, 2016 4:34 pm    Post subject: Reply with quote

Only the old 283 had no pcv system. The other 2 would have. I don't think you'd find any power in an hei over a fresh point distributor either. Alot of guys are still running the points dizzy at the track even yet. I don't like the maintenance factor or the quality of todays points myself though. The old power pack heads would ultimately be the limiting factor but I think its probably over carb'd for a 283.

What I was looking at was peaking so early with a small motor. Put a cam in there that will peak 6500 or so and let's see what the 283 can do. Maybe even higher.

Now that ls6 454, I know that bb's ultimately have a much higher possible power limit, but seeing that hp rating kind of explains every big block we've seen on the dyno. There's also a reason almost everyone who builds a bb chevy now days goes bigger then 454. Alot of times the heads are just too big for a motor that size. Especially the rectal ports like the ls6 got.

Something else I'm thinking bout. Remember the ls6 required a dual disc clutch and M22 or a th400. That seems kind of laughable now at that power rating.
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Twilightoptics
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Joined: 13 Jan 2004
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Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Mon May 09, 2016 4:44 pm    Post subject: Reply with quote

Easy to blow up a Wide Ratio Muncie with torque though, that's why the 22. Now put a wide ratio M21 with a supercase behind virtually anything!
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