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Just Another Typical Big Block Stroker Dyno Test

6.8K views 32 replies 25 participants last post by  Cam  
#1 ·
Image


Or maybe not! :D

I know it's not a BBC in a Chevelle but it is a big block going in a '62 Impala SS Conv. My goal was TOTALLY STOCK APPEARING and 500 lb/ft. Here's what I did:

1962 068 QB Block (stock 2-bolt mains w/ ARP bolts)
.040 10.5 to 1 ROSS Pistons
6.385 BBC Rods
4" Eagle Stroker Crank (475 c.i.)
ATI SBC Super Street Damper
'62 690 Hi-Po Heads (no porting, aftermarket guideplates, BBC screw-in studs)
ISKY HR-546 Hydraulic Roller (238 @ .050, .578, 110LC, installed 106.5)
ISKY Lifters
COMP BBC Ultra-Pro Magnum 1.7 Rollers
Stock 881 Dual Quad Intake (port matched)
Stock 625cfm Carter Carbs (Fully restored by Eric @ Vintage MuscleCar Parts :hurray: )
Stock Dist. w/ Pertronix 1
Stock hi-po 2 1/2 inch Exhaust Manifolds

Best pull on a DTS Dyno was 484 HP and 510 lb/ft of Torque. Dyno sheets and random pics attached and here is a link to a video of that run:

http://www.calwaterfowl.org/web2/images/475stroker.m4v

Many, many thanks and beers owed to Jack Gibbs at 409 Chevy Performance and Tony Borello Race Engines. :beers:
 

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#3 ·
Thanks!

I believe the guide plates I used were from Lamar Walden.

The previous mill was an oil-burnin', low compression, clapped out piece of $%^ from the previous owner that I limped along for 15 years while I saved my nickels and dimes. Should be a lot better now.
 

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#6 ·
Thanks! The stroker will be in front of an M-20, CF Dual Friction, Hurst Shifter (all stock appearing), and 3.36 open (for now).

I used COMPs Ultra Pro Magnum BBC roller rockers, 1.7 ratio. 409's had a 1.75 ratio stock, but going with the 1.7's only cost me .012 of lift. Got all those valvetrain mods to fit under stock valve covers, too. (WASN'T EASY)
 
#7 ·
Got all those valvetrain mods to fit under stock valve covers, too.

(WASN'T EASY


I'm sure thats why I asked :) Good job ...

....have a friend who did up a very very nice 64 409 dual quad 4spd SS vert .........but he did not take the time to build the motor with a good combo like yours.... I tried to tell him ..now he is disapointed in its perf ..... yours should run real strong ........the hot rodder in me says the motor would like more rear gear .....but 3.36 will be perfect for highway cruising in that vert :thumbsup:
 
#11 ·
Got all those valvetrain mods to fit under stock valve covers, too.

(WASN'T EASY


I'm sure thats why I asked :) Good job ...

....have a friend who did up a very very nice 64 409 dual quad 4spd SS vert .........but he did not take the time to build the motor with a good combo like yours.... I tried to tell him ..now he is disapointed in its perf ..... yours should run real strong ........the hot rodder in me says the motor would like more rear gear .....but 3.36 will be perfect for highway cruising in that vert :thumbsup:
I didn't want to use valve cover spacers so I.... (cringe :() trimmed the stock drippers away. This, plus a 1/4 inch thick gasket and slightly oblonging the holes for more intake side clearence did the trick.

A 3.36 or 3.55 Posi is on the list.
 
#12 ·
Congrats on helping to keep the "W" motor legend alive, with a dyno test, no less!!! :hurray:

Did the aftermarket "W" block ever come to fruition?
Thanks!

Last I heard the aftermarket block was "available" but none had shipped. Then I heard all the initial run orders were full. I could be wrong...
 
#15 ·
Very nice!!! Cool old engines,:cool: they just look slick, thanks for sharing :beers:

I have done a few 348/409's & we are sloooooooowly doing a 4" stroke 409 for a local guy out here now
It will have the Ede heads & single 4 intake but that old 425/409 look is just the way it should be,,, :thumbsup:

Had to modify a few programs for the CNC so we could do the block machine work

Have a friend who bought a complete engine from Lamar a couple of years ago for his 62 (I think) Impala but it isn't done yet,, another long term project

Anyway good to see the "old stuff" still alive & well beatiful job :thumbsup:
 
#19 ·
That is totally awesome. Just awesome. And I think you will love driving it. My BBC 496 is similar in many respects (Isky hydraulic roller, 228/238 duration, lift in the neighborhood of .570) and it is a torque monster. A total hoot to drive on the street...can spin the tires at just about any speed. I'm running 3.42 gears, and I think your 3.36's are probably perfect.

Now I'm sitting here wondering if a 409 would fit in my 64 C10 truck...
 
#30 ·
Love the 409! What color/type/brand paint is that on the valve covers? I love that look!:beers:


Tom
That is the factory, '62-only V/C paint. Kinda like a silver/green. I got it from a repo parts supplier and it's PPG Delstar or Deltron, Acrylic enamel.
 
#28 ·
My dad had pretty much the exact same car. I was born in November 1962, and dad bought his Impala SS shortly before I was born. His was also a 327/300 with 4-speed, and it was a dark blue with blue interior. It was the only car we had until he bought a new 71 Impala. I spent a lot of miles riding in the back and listening to the radio out of that speaker in the center of the rear seat :)
 
#31 ·
beautiful motor Erick....a 409 is still on my bucket list. I came within a day of getting a '65 400hp one but the ahole sold it out from under me....ended up with a '65 395/425 though so all was not lost...:thumbsup: Dave
 
#32 ·
AWESOME BUILD! Hey, one of our Chevelle buds, Randy K here in WNY with an AACA-lvel Aztec Bronze 66, races a dang, I think its a Chrysler steel body powered by a 409 Chevy n the senior nostalgia class. It has a unique exhaust note under power it seems to me.

TOO COOL! Love me a bubbletop droptop!
 
#33 ·
I love this sort of build, a stock appearing ringer. Those rears are the weak point in the drivetrain so maybe a Moroso Brute Strength girdle could be incorporated.

Gene, you must be craving old times. We were all 10 years younger and even Lamar Walden has passed on since this thread was started