[ta man]

Originally Posted by Steve C.

Stated-"TA Man, You have the specs of the OF 2.0 cam?"

"When the cam arrived I had to sign for it, open the tube with a secret code, the cam card had ink on it that disappeared after 5 minutes."
TA Man

Source: http://forums.maxperformanceinc.com/...&highlight=2.0

I'm pretty sure reading between the lines in that thread it can be figured out. But for right now it is still secret squirrel stuff...LOL

.

Its not too hard to figure out..its basically the OF cam with more aggressive opening lobes and more valve lift.It drives and idles exactly the same just thumpier.Its still only a 236/246....@.050

[ta man]

Here's the fastest timeslip.

[Steve C.]

"When the cam arrived I had to sign for it, open the tube with a secret code, the cam card had ink on it that disappeared after 5 minutes."

That is classic, loved it

I'll take a stab...

Magnum lobe 3122B
289
236
160
.3800"

XE lobe 3196B
287
236
162
.3910"


.

[ta man]

Originally Posted by Steve C.

"When the cam arrived I had to sign for it, open the tube with a secret code, the cam card had ink on it that disappeared after 5 minutes."

That is classic, loved it

I'll take a stab...

Magnum lobe 3122B
289
236
160
.3800"

XE lobe 3196B
287
236
162
.3910"


.

I should have added it was written in Canadian!

[cnc]

Hey Ernie it was good to get out together this year finally.....
It was a beatutiful day to be at the track ...nice weather little bit of a breeze..ran 12.24 best for the day and best 60 for me too.....
Yep was a good day at the track....Ernie's car flat out moves.....
Andy we gotta get out there the three of us......before the season is done.....

[slowbird]

Ta man, without wading through everything, what size is the intake valves in your heads?

[ta man]

intake 2.11 Exhaust 1.77.

[ta man]

Originally Posted by cnc

Hey Ernie it was good to get out together this year finally.....
It was a beatutiful day to be at the track ...nice weather little bit of a breeze..ran 12.24 best for the day and best 60 for me too.....
Yep was a good day at the track....Ernie's car flat out moves.....
Andy we gotta get out there the three of us......before the season is done.....

It was a pretty relaxing day I liked it. I'm pretty sure you will see high 11's in the cooler weather which is really amazing with the stock look of your engine. It was pretty cool how many people would make the effort to walk back to where we were just to check the cars out! The guy that asked how much nitrous I was spraying was pretty good. Then when I told him the gearing he was really confused!

[77 TRASHCAN]

LOL, Pontiacs don't need nitrous to run 10's. The poor guy's brain likely froze up when you told him you were running 3.08 gears...

So Chris, any future power upgrades planned for your engine?

Where was Andy?

Ernie, what exact tire do you run?

[Steve C.]

If interested here are reported flow numbers for a set of Dave Bisschop KRE D-port 82cc 300-305 CNC ported heads / 2.110 & 1.770 valves w/ 45 degree seats. Note, these numbers are from 2010 and they might be similar to Ernie's current '305' heads, but that would be a guess on my part. Numbers from one cylinder tested at 28 inches. No intake runner volume reported.

Intake:
.100 74.7
.200 148.4
.300 211.4
.400 260.1
.500 290.4
.600 304.3

Exhaust:
.100 68.5
.200 127.2
.300 167.1
.400 195.4
.500 218.9
.600 231.5

Average exhaust-to-intake flow ratio thru the lift curve is 78 percent. And my stab at the current exhaust lobe in use from the information within the link I posted, it's Magnum lobe 3123B with 246 at .050" and .4000" lobe lift. And the obvious, the intake cam specs I mentioned previously were the regular Old Faithful vs the revised OF 2.0 version. These lobe numbers are right from the Comp Mater Lobe Profile Catalog.


.

[pastry_chef]

Originally Posted by Steve C.

Average exhaust-to-intake flow ratio thru the lift curve is 78 percent.
.

Thanks Steve.
One advantage to solid cams is the ability to tweak lash and let an engine tell you what it really wants.
Without that feedback, 10 degrees extra .050 duration on the exhaust seems to be a common default.

[slowbird]

Shift rpm?

[ta man]

5800 or so..it may like 6000 to 6200

[Steve C.]

"5800 or so..it may like 6000 to 6200"

If it helps, proven dyno numbers for a similar combo. But 4 degrees less intake duration.

455 .030 over
4.250 stroke
KRE 300/305 d-ports
CNC port matched torker II / HP950 carb
246 degree hydraulic roller / 112 LS
593-600 ft.lbs. Tq / 4600-4700 (peak)
589 hp at 5800 rpm (peak)



.

[Lee]

Originally Posted by ta man

I should have added it was written in Canadian!

And the lifts and durations were metric?

:-)

[Steve C.]

About 0.016764 meters gross valve lift with his Harland Sharp rockers

0.660"

Works very well the heads that will continue to flow past 0.600" lift.

.

[ta man]

Originally Posted by Steve C.

"5800 or so..it may like 6000 to 6200"

If it helps, proven dyno numbers for a similar combo. But 4 degrees less intake duration.

455 .030 over
4.250 stroke
KRE 300/305 d-ports
CNC port matched torker II / HP950 carb
246 degree hydraulic roller / 112 LS
593-600 ft.lbs. Tq / 4600-4700 (peak)
589 hp at 5800 rpm (peak)



.

Thanks, Dave figured 5800 to 6000rpm for peak hp..

[ta man]

I guess its time to finally install my shiftlight..since my factory tach only goes to 6000rpm.

[Steve C.]

Ouch, I just noticed a BIG mistake I made in conjunction with the combo mentioned in my post #54. The cam used had 10 degrees more intake duration than the OF 2.0 here ! Obvious mistake as I stated it had 4 degrees less. It made peak power at 5800 rpm with a 246 degree hydraulic roller cam. I should also point out It used solid roller lifters which would have a tendency to raise the peak rpm a bit.

Sorry for the confusion.

Here was testing by Dave previously with less cylinder head and the 'regular' OF cam, from his web site....

" We decided to do some intake manifold comparison testing on a 474ci engine running a set of our 290cfm CNC ported KRE D-port heads with 10.2 to 1 compression on 91 octane fuel with a 236/245 duration hyd. roller cam. Torker II has a square bore plenum so we installed a 950HP Holley on top of it with a 1" open spacer for the last test. The Torker II didn't disappoint and produced 554hp @ 5500rpm and 584 lb ft m. @ 4500 rpm. "


.

[ta man]

Originally Posted by Steve C.

Ouch, I just noticed a BIG mistake I made in conjunction with the combo mentioned in my post #54. The cam used had 10 degrees more intake duration than the OF 2.0 here ! Obvious mistake as I stated it had 4 degrees less. It made peak power at 5800 rpm with a 246 degree hydraulic roller cam. I should also point out It used solid roller lifters which would have a tendency to raise the peak rpm a bit.

Sorry for the confusion.

Here was testing by Dave previously with less cylinder head and the 'regular' OF cam, from his web site....

" We decided to do some intake manifold comparison testing on a 474ci engine running a set of our 290cfm CNC ported KRE D-port heads with 10.2 to 1 compression on 91 octane fuel with a 236/245 duration hyd. roller cam. Torker II has a square bore plenum so we installed a 950HP Holley on top of it with a 1" open spacer for the last test. The Torker II didn't disappoint and produced 554hp @ 5500rpm and 584 lb ft m. @ 4500 rpm. "


.

Basically my old setup other then a Wilson tapered 4 hole spacer , and most likely my intake manifold flowed a little better. Compression would be near identical.