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Proven Engine Combinations Engine combinations, and the resultant HP and/or E.T.s

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Old 02-28-15, 07:59PM   #16
gtofreek
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Here is a link to my 413 that I am planning as a 650 HP build, N/A. Not done yet, so it's not what you would call a proven combo yet, but I'm confident it will fall well within your parameters of this thread.

http://pontiaczone.com/forum/showthread.php?t=30164
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Old 03-08-15, 12:08PM   #17
steve
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IA2 block, 535 ci., 440 cfm tiger heads, 264-270 with 740 lift solid roller, 11 to 1 compression. Chassis dyno 631 HP@6500 and 534 torque @ 5200. The heads are a little overkill for this pump gas street engine but it does pull forever and loves the higher rpm.

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Old 03-16-16, 10:13AM   #18
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Default 400 / 495 68' HO block FROM AUSTRALIA

400 / 495 68' HO block
950 CFM QUICK FUEL
TORKER II PORTED
E ROUND HEADS 350 CFM 72 cc chambers
COMP HYD ROLLER 248 / 254 @ .050 with .610/.638 lift on a 110
ROSS PISTONS 4.185 BORE 11.41 COMP WITH -15 cc DISH
EAGLE CRANK 4.500 STROKE
EAGLE 6.800 RODS

NOT RACED
68 FIREBIRD
TURBO 400
3000 STALL
9 INCH REAR 3.55 GEARS

DYNO
624 hp @ 5700 RPM
689 LBS TORQUE @ 5300 RPM
KILLA TORQUE MONSTER!
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Old 04-19-16, 12:40AM   #19
Steve C
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The engine performed flawlessly and produced 687 horsepower and 629 torque.....nice engine.

http://forums.maxperformanceinc.com/...d.php?t=776593
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Old 01-13-19, 09:09AM   #20
blykins
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Quote:
Originally Posted by ponchopower69 View Post
Let's hear about some proven 6-700ish HP combos.... I am building a 77 Astre and looking for good 9's for now to see if I can make the car put that much to use. So I was wondering what some 6-700HP motor combos look like and what it took to get it there. It don't matter if it's NA or power adder comber either.
I love the 4.125-4.150" bore with a 4" stroke combination. It works well for Windsors/Clevelands and it works well for Pontiacs that I've done with that combination.

I did a 4.150" bore 400 block with a Scat steel 4" crankshaft, mild hydraulic roller, 10.5:1, with a set of Kauffman high port heads and a Performer RPM intake, that made 600 hp @ 6000 rpm.

Good lookin piece too, if I do say so myself.



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Old 01-13-19, 01:30PM   #21
Steve C
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" I love the 4.125-4.150" bore with a 4" stroke combination"

About 20 years I decided to do a 4-inch stroke combo with the goal of making 700 hp at or below 7000 rpm. But I didn't like the idea of using a factory crank back then. So we went to Crower for a custom billet piece, but then decided to make it a 4.125" stroke. Took a 400 block with a 4.165 bore and produced a 450 cid engine. Edelbrock 329 cfm heads with 11.2 compression. Victor intake and a Brad Urban Stage III Holley "750" carburetor. Solid roller cam using UltraDyne lobes with 283/294 at .050", .4267" lobe lift, 1.65/1.66 rocker ratio and 110 lobe separation. 2-inch headers.

On the dyno the engine made 699.9 hp at 6900 rpm. In my '70 Trans Am the best was 10.36 at 129 mph on motor and 9.59 at 140 mph nitrous.

Today my current 505 street engine made 660 hp at 6000 rpm on the dyno.


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Last edited by Steve C : 01-13-19 at 01:47PM.
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Old 01-16-19, 05:26PM   #22
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I looked back at some build notes for this one the other day. I was a little off on the compression ratio, it was actually 10.7:1, not that it would make much difference....but for the sake of accuracy.

What's interesting is how well those heads work. It only took a 229/229 @ .050" camshaft to peak at 6000 with 434 cubes.
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