just want some reassurance on combo choices

[Maniacmechanic1]

I would like to see the HR306 & Isky 272/282 Ran single plane open exhaust.
Get an idea how close my DD2000 is to your ES.

 

[Maniacmechanic1]

Straight up both cams to begin with.

Then optimize His Cams today John.

 

[Maniacmechanic1]

Everything stays even level that way

 

[Christopher Williams]

View attachment 10710 View attachment 10711 View attachment 10712
Head specs look good every one?

Compression 10.5ish

 

[Grumpy]

yes, theres no doubt, a single plane intake design in the software , dyno makes more peak power
Im more concerned with maximizing the 3500-rpm-6300 rpm torque curve
than the combos potential peak power, that engine might make,
thats why I suggest a port matched air gap dual plane,
youll spend a great deal more time in that 3500-rpm-6300-rpm power band with the listed 3.43 :1 rear gear ratio, and no I would shift at 6300 rpm,

 

[Strictly Attitude]

1.5 rocker

1.6 Rocker Overlay graph

Still working will do the single plane next then Brians Isky cam same deal used 15" 4" tall filters and 1.75 headers x pipe and exaust

 

[Strictly Attitude]

please look over numbers as calculated tell me if any errors seen

 

[Strictly Attitude]

street or race single plane?

 

[Maniacmechanic1]

street or race single plane?

Go Race.
Fatten up Torque curve and see max HP

 

[Strictly Attitude]

ok will do

 

[Christopher Williams]

street or race single plane?

Holley 300-25.

 

[Grumpy]

lets see what the other choices result in.
(you might want to try a 950 cfm carb )
yeah old school and a 1050 cfm, dominators easier to locate
http://garage.grumpysperformance.com/index.php?threads/the-holley-three-barrel-carb.3037/

 

[Christopher Williams]

lets see what the other choices result in.
(you might want to try a 950 cfm carb )
yeah old school and a 1050 cfm, dominators easier to locate
http://garage.grumpysperformance.com/index.php?threads/the-holley-three-barrel-carb.3037/

I have several carbs. 950 aed is a favorite of mine

 

[Strictly Attitude]

Crane Single plane 1.5 ratio

Crane Single plane 1.6 Ratio

Single plane overlay

 

[Strictly Attitude]

Here is the overlay of the dual vs single of Grumpy's Crane choice dynamic is in safe zone no Asymmetry added no info how many degrees, needed to calculate.
dp is dual plane
sp is single plane
Brian is up next Isky time

 

[Strictly Attitude]

Brian you enter the Isky valve timing events @.050 with advertised event numbers

 

[Maniacmechanic1]

 

[Maniacmechanic1]

750.
Then use 1085 Cfm 4150.

 

[Grumpy]

I tried to make this easier to under stand is this correct?
looking at the charts and dyno curves

the dual plane at 4000 rpm has about 460 ft lbs of tq , peak near 518 hp

the single plane at 4000 rpm has closer to 413 ft lbs, peak hp near 546 hp

that 3.42:1 rear gear ratio further increased the mechanical leverage , to well over 1500 ft lbs at the wheels

 

[Strictly Attitude]

Single Plane 1.5 Isky 272/282

Single Plane 1.6 Isky 272/282

Overlay Single plane 1.5 and 1.6 lifters