just want some reassurance on combo choices

[Christopher Williams]

I spent alot of time on the Trans Am Forum while I was gone Grumpy for almost 2 years.
Every single Pontiac Guy in the world all eyes on me.

DD2000 every day.
I dispelled many.
Furious Many.

Truth hurts at times.

Thanks for crunching numbers for me

 

[Strictly Attitude]

I would run the 1.6 and I am a fan of the air gap had one on my 355. Should prove interesting what it does on the curve.

 

[Maniacmechanic1]

How does that cam act with a dual plane air gap? With 1.6 ratio rockers?

I would have try that combination tonight after work.
No DD2000 on my phone.

 

[Maniacmechanic1]

The Isky 272/282 I noted was not picky at all about Carb CFM size nor Primary header tube size.
780 CFM max carb size recommend from the Isky Catalogue.

 

[Maniacmechanic1]

Big CFM carbs can be hard to get throttle response. Or Transit response on the street.
Annular Boosters used to take care of 950-1085 com in a 4150 baseplate Holley 4 bbl.

 

[Maniacmechanic1]

Hate spellcheck on this phone.

 

[Maniacmechanic1]

The Dual Plane Intake costs 56 Hp with the Isky 272/282.
1.6 rockers not much of an improvement.

Run the Single plane intake.

Ran a simulation with Isky and mufflers.
A true 500 Hp with 87 octane gas.

Post results later.
It's my Sons Birthday.

 

[Maniacmechanic1]

Isky 272/282 HR Cam with Dual Plane intake. 1.5:1 Rockers.
Down 56 HP.

 

[Maniacmechanic1]

ISKY 272/282 With single plane.

 

[Maniacmechanic1]

Isky 272/282 HR with single plane & 1.6:1 Rocker arms.

 

[Maniacmechanic1]

Isky 272/282 HR with 1.5:1 Rockers.
Sinlge Plane intake.
Small Tube Headers with Mufflers.
A True 500 Hp on 87 octane in street driving trim.

 

[Maniacmechanic1]

If You look at the VE numbers with no mufflers and with Mufflers the Isky is not real sensitive to back pressure.
Prefers open exhaust but still making very good power capped off to quiet it down.

 

[Christopher Williams]

If You look at the VE numbers with no mufflers and with Mufflers the Isky is not real sensitive to back pressure.
Prefers open exhaust but still making very good power capped off to quiet it down.

Very surprised the dual plane intake was that sebsitsen on overall power

 

[Maniacmechanic1]

Very surprised the dual plane intake was that sebsitsen on overall power

It wants an Open Plenum single plane intake.
Many Variations of single plane intakes made present & past.

 

[Maniacmechanic1]

Loosely termed but I would look for and use a Medium plenum volume single plane.
Tends to help with throttle response.
Street driving.

Track WOT try a Large plenum volume.

Engine is to large Cubic Inch for some Vintage small plenum volume single planes made 20-50 years ago.

 

[Maniacmechanic1]

I played around with DD2000 and the Isky 272/282.
Found the Optimum static compression ratio to Net 8.2:1 dynamic compression for 93 octane.
Then ran an engine simulation.
Achieved over 600 HP.
Post results next.

 

[Maniacmechanic1]

Waiting uploading Pictures.
IMIGUR is slow today.
My satellite internet is fine.
Have to show you guys later.

 

[Christopher Williams]

I played around with DD2000 and the Isky 272/282.
Found the Optimum static compression ratio to Net 8.2:1 dynamic compression for 93 octane.
Then ran an engine simulation.
Achieved over 600 HP.
Post results next.

I'm curious to see what it would have to be. I have a hard time with that cam jumping up with that kind of power with that low duration and lift

 

[Maniacmechanic1]

I'm curious to see what it would have to be. I have a hard time with that cam jumping up with that kind of power with that low duration and lift

I am at work now.
Then later doing Race Car Fabrication work with my Bud Ed here in Joliet IL.
Be Home 9-10 pm Central time.
Try posting again with IMIGUR.

 

[Maniacmechanic1]

Its a Neat Cam The Isky 272/282.