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  #31 (permalink)  
Old 06-11-2012, 09:36 AM
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I have worked on and drove a few 69 Z28, one being a one owner, all original, 18,000 mile car with the chambered exhaust. Even with a 4 speed and 4.10 gear, it was a dog. My seat of the pants dyno says it was a high 13 to 14.0 second car with a good driver and slicks.
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  #32 (permalink)  
Old 06-11-2012, 10:01 AM
How fast is fast enough?
 
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Quote:
Originally Posted by lmsport
I have worked on and drove a few 69 Z28, one being a one owner, all original, 18,000 mile car with the chambered exhaust. Even with a 4 speed and 4.10 gear, it was a dog. My seat of the pants dyno says it was a high 13 to 14.0 second car with a good driver and slicks.
but but but It was the Chevy 302! The miracle engine gifted by God at Mount Sinai. It had a bajillion horsepower and would make the rear wheels run over the front ones if you went past half throttle.
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  #33 (permalink)  
Old 06-11-2012, 10:40 AM
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Quote:
Originally Posted by ap72
but but but It was the Chevy 302! The miracle engine gifted by God at Mount Sinai. It had a bajillion horsepower and would make the rear wheels run over the front ones if you went past half throttle.

But... But... it sounds like that high 13 second car would stomp a mud hole in the small motors you've built...
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  #34 (permalink)  
Old 06-11-2012, 11:08 AM
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Quote:
Originally Posted by prostreet6t9
But... But... it sounds like that high 13 second car would stomp a mud hole in the small motors you've built...
The 2.3L is probably around a high 13 quarter... and its a little less than half the size... Really makes that 302 look impressive doesn't it?
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  #35 (permalink)  
Old 06-11-2012, 11:08 AM
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Quote:
Originally Posted by ap72
but but but It was the Chevy 302! The miracle engine gifted by God at Mount Sinai. It had a bajillion horsepower and would make the rear wheels run over the front ones if you went past half throttle.
You're kinda exaggerating with the " bajillion HP" And "miracle" engine! Nobody is claiming that. Just that for a small CI motor they would run. To run in the SCCA series the motor had to make some hp.
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  #36 (permalink)  
Old 06-11-2012, 11:13 AM
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Quote:
Originally Posted by prostreet6t9
You're kinda exaggerating with the " bajillion HP" And "miracle" engine! Nobody is claiming that. Just that for a small CI motor they would run. To run in the SCCA series the motor had to make some hp.
For a small CI engine in the late 60's they were pretty good. Compared to anything that wasn't as small or as old they were nothing impressive at all.

That is my point, things have changed a LOT in the past 50 years and for some reason people can't realize that while 290hp was impressive in 69 that's nothing compared to what you can find in almost any dealership today, dodge, ford, chevy, mitsubishi, bmw, jaguar, subaru, etc. All of them have been well past 290hp for some time.
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  #37 (permalink)  
Old 06-11-2012, 11:15 AM
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Quote:
Originally Posted by ap72
The 2.3L is probably around a high 13 quarter... and its a little less than half the size... Really makes that 302 look impressive doesn't it?
Yup.. They'd still outrun your motors.
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  #38 (permalink)  
Old 06-11-2012, 11:18 AM
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http://www.superchevy.com/technical/...d/viewall.html

There's a good build of a warmed up 302. Granted it's a magazine build so...

But.... 519Hp at 7400 RPM'S is a pretty good number in my book.
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  #39 (permalink)  
Old 06-11-2012, 11:30 AM
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Guys guys guys!!! the rational for the 301 in the z28 was the fact that SCCA had a race rule that required that size an engine and there was a rule that required that 500 production units to be built and be available to the retail customer..Ford based theirs on the 289 Chrysler based theirs on the 273 and gm based theirs on the 273..Bore those engines out to be just at the 5.0 liter limit fo the race class and there you go..

Thos 5 liter 301/302 are good motors in the right car when needing to meet a disp limitation for a particulat race class..

Nuff said
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  #40 (permalink)  
Old 06-11-2012, 11:44 AM
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Quote:
Originally Posted by prostreet6t9
http://www.superchevy.com/technical/...d/viewall.html

There's a good build of a warmed up 302. Granted it's a magazine build so...

But.... 519Hp at 7400 RPM'S is a pretty good number in my book.

Their blueprint build was 350hp, which seems reasonable with long headers and no accessories.


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  #41 (permalink)  
Old 06-11-2012, 11:58 AM
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your "blueprint" engine was not built to factory specs.

Given a little leeway here and there superstock engines are the same as they roll of the factory line too right?
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  #42 (permalink)  
Old 06-11-2012, 01:22 PM
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I have two 70 novas and have decided against the 302 idea and gonna sell the other nova dont need another project right now,someday would like a 67 chevy2,but have already done a lifted shortbox and the nova gonna take a break and enjoy them thank you all for the input
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  #43 (permalink)  
Old 06-11-2012, 01:26 PM
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Quote:
Originally Posted by ap72
your "blueprint" engine was not built to factory specs.

Given a little leeway here and there superstock engines are the same as they roll of the factory line too right?
But.. but.... you said they wouldnt make any power???? The super stock engine had to have had some weird stuff going on.. Running that good with only a 480ish inch cam..

Nobody is saying they run that good off the showroom floor.
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  #44 (permalink)  
Old 06-11-2012, 01:38 PM
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Quote:
Originally Posted by ap72
I have never seen anything even remotely suggesting the 302 could come close to 425hp in stock form- because it was a LONG way off. Also, spinning at 7,000 RPM and making power at 7,000 rpm are two different things, floating the valves isn't good for power...

Nostalgia is a helluva drug.
I would guess at 26 yrs. old you probably know much more than I do. I better shutup.
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  #45 (permalink)  
Old 06-11-2012, 01:39 PM
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Quote:
Originally Posted by prostreet6t9
But.. but.... you said they wouldnt make any power???? The super stock engine had to have had some weird stuff going on.. Running that good with only a 480ish inch cam..

Nobody is saying they run that good off the showroom floor.
my point is that they don't run good off the showroom floor. I assumed any argument made was trying to stay relevant.

If you change the heads, intake, carb, rods, pistons, headers, ignition, cam, valvetrain, timing set, oil pump/pan/pickup, bolts, block, and crank, then yes those engines can do quite well and I don't think anyone can argue that.
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