"Sam" (samwellington)
10/26/2015 at 15:46 • Filed to: None
2
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"Sam" (samwellington)
10/26/2015 at 15:46 • Filed to: None | 2
| 16 |
My questions are as follows and pertain to our 1964 Impala Coupe with the 250hp 327 and 2 speed auto -
1) What is the difference between the 250hp and 300hp 327’s (i.e. what did they have that gave them the 50hp bump)?
2) Similar to the above, what was the difference between the 327 in the normal car and the 327 in the SS?
3) This is an opinion question - should we upgrade the engine to the 300hp/SS engine spec, or leave it as stock?
The car has 60k miles and is in decent condition, it’s just been sitting in a garage under a cover for about 8 or 9 years.
Here’s the car when my dad first bought it when he was in his 20’s. That’s also his Celica that he raced in SCCA wheel-to-wheel racing. My dad is pretty cool.
SidewaysOnDirt still misses Bowie
> Sam
10/26/2015 at 15:54 |
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I’m guessing different cams and/or solid lifters. The compression was the same between the 250 and 300 and they used the same carb, so there isn’t too much else to look at.
Your boy, BJR
> Sam
10/26/2015 at 15:55 |
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You have a ‘64?!?!? JUICE IT!
T5Killer
> Sam
10/26/2015 at 15:58 |
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#1 I would assume its cam, bigger valves, higher compression (different pistons) and intake manifold and carb.
The other ones I am not to sure on.
bob and john
> Sam
10/26/2015 at 16:01 |
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if its a numbers matching car, dont mod it.
if it isnt, go for it
Sampsonite24-Earth's Least Likeliest Hero
> Sam
10/26/2015 at 16:08 |
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That celica though
shop-teacher
> bob and john
10/26/2015 at 16:17 |
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This. Keep it stock if it’s numbers matching. Otherwise, dooo eeeeeeetttt!!!!!!!!
lone_liberal
> Sam
10/26/2015 at 16:29 |
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I’m no expert so I turned to the Google and found:
“The 327/250 and 327/300 had the same cam, pistons and compression ratio. The 327/250 had 1.72/1.50 valve heads, the 300 had 1.94/1.50 valve heads. The 327/250 had a Rochester 4GC carb and matched intake manifold, the 300 a higher air-flow Carter AFB carb and matched intake. The 327/250 had exhaust manifolds with 2” outlets and head pipes, the 300 had manifolds with 2 1/2” outlets and 2 1/2’ head pipes. There were some exceptions.”
I also found that the SS had engine-turned aluminum trim.
ttyymmnn
> Sampsonite24-Earth's Least Likeliest Hero
10/26/2015 at 16:37 |
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Came here to say the same thing. It looks beautiful.
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Sam
> bob and john
10/26/2015 at 16:52 |
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It’s incredibly numbers matching. Only been painted once, ever, and it was in Chevy factory paint.
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Sam
> Sampsonite24-Earth's Least Likeliest Hero
10/26/2015 at 16:53 |
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He had several. I’ll see if he has any more pictures and put together a post with their stories.
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Sampsonite24-Earth's Least Likeliest Hero
> Sam
10/26/2015 at 17:16 |
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Please do. I’d love to learn more.
camaroboy68ss
> Sam
10/26/2015 at 17:52 |
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Questions answered in order
1) internals were the same between the two, the had the 1.94 valves (the biggest in 64) a better carb and intake and the larger corvette exhaust manifolds.
2) nothing differnt. The SS option was more of a style package in 64. It included the badging, slightly different trim, and most had front bucket seats and a console with a floor shifter
3) Id say go for it, just keep what you pulled off. Plus their really is no visual difference between the two unless a trained eye really goes over it. You could honestly go even bigger and more towards the corvette with like a Duntov cam and still keep that factory original look.
As an owner of a low milage original 68 camaro I faced the same decision. I took my 275hp 327 and put a lot of the Z/28 302 stuff on it while I have all my stock correct stuff stored away.
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camaroboy68ss
> Sam
10/26/2015 at 17:59 |
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Forgot to add, if looking for a little more but correct for 64 the only other two 327s available with more hp were on the Corvette rated at 365hp and 375hp. They were the same motors with the only difference being that the 375hp was the fuel injected motor. The 365 was a 4 barrel carb. They had solid lifter cams, aluminum intake and the same carb as the 300hp( might have been a holley though can’t remember).
RallyWrench
> Sam
10/26/2015 at 18:59 |
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The amount of win in that picture boggles the mind. Even the truck is great.
sdwarf36
> bob and john
10/26/2015 at 20:20 |
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Theres a catch. Camaroboy can confirm + expand on this-pre ‘72 (?) GM cars aren’t serial numbered in a way where you can tell very much from the VIN. Where if you had a Ford, you could tell that a car “was Grabber Blue-302-certian trim package-built by Ralph.” You might be able to nit-pic a date coded part here or there-but not engine size or model.
Pixel
> sdwarf36
11/02/2015 at 14:39 |
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You can pull some detail from the vin(model(w/ engine type(6 vs 8), body style, plant), but the cowl tag will have the crazy high level of detail you’re taking about.
And Chevy has the frame & block numbers matching. Ford of that era only date-coded blocks. So with a chevy you can tell if it is the original engine, with a ford you can only tell if it is from the right time frame.