[BigRat09]

I've entered my complete engine plan, including head flow numbers, into this program from comp cams called Cam Quest 6. Here it is:

496 big block
Patriot Performance Heads 320cc
Comp Cams Hydraulic roller, .612/.612 lift, 244 dur @ .050 and 110 LSA
10.1:1 comp
Performer RPM Air gap
Demon 850 cfm carb

Results from this program say 695 hp and 650 ft/lbs. Based on other builds I see, cam specs, compression etc. This seems to be an exaggeration. I estimate it around the low 600 to 650 range.

Does anyone think this type of power is available from this buildup?

Does anyone have a program that can give realistic power output based on the above info?

Thanks,

Josh

 

[71 chevy]

its way too high.

 

[BigRat09]

Okay.... what do you estimate?

 

[trmnatr]

590hp as a guess, maybe as high as 620hp??

 

[Mikeys69]

I've entered my complete engine plan, including head flow numbers, into this program from comp cams called Cam Quest 6. Here it is:

496 big block
Patriot Performance Heads 320cc
Comp Cams Hydraulic roller, .612/.612 lift, 244 dur @ .050 and 110 LSA
10.1:1 comp
Performer RPM Air gap
Demon 850 cfm carb

Results from this program say 695 hp and 650 ft/lbs. Based on other builds I see, cam specs, compression etc. This seems to be an exaggeration. I estimate it around the low 600 to 650 range.

Does anyone think this type of power is available from this buildup?

Does anyone have a program that can give realistic power output based on the above info?

Thanks,

Josh

I use the grand daddy to that program. Dyno-Sim Pro.
I have found the numbers are way to high compared to real life.
Seams like any thing over 500hp I have to remove 15%hp and 12%tq.

The last Dyno-Sim vs a real Dyno was on Mr. HorsePowers SBC.
My guess with Dyno-Sim was with in 1hp and 4tq.

 

[BigRat09]

I used dyno2k and found that Camquest is off by about 120hp! On dyno2k, my setup with a dual plane intake was 575 hp and 545 tq.

I swapped out for a single plane intake and got 637hp and 595 tq. Much closer to what I was looking for and much more realistic considering the heads I am using.

Thanks to 71 Chevy for your help!

 

[71 chevy]

do you have the flow numbers for those heads? 60+hp changing to a single plane is unusual.

Im guessing the final number will be between the 575 and 626 hp depending on if the head actually flows what they claim it does.

 

[Mikeys69]

I've entered my complete engine plan, including head flow numbers, into this program from comp cams called Cam Quest 6. Here it is:

496 big block
Patriot Performance Heads 320cc
Comp Cams Hydraulic roller, .612/.612 lift, 244 dur @ .050 and 110 LSA
10.1:1 comp
Performer RPM Air gap
Demon 850 cfm carb

Results from this program say 695 hp and 650 ft/lbs. Based on other builds I see, cam specs, compression etc. This seems to be an exaggeration. I estimate it around the low 600 to 650 range.

Does anyone think this type of power is available from this buildup?

Does anyone have a program that can give realistic power output based on the above info?

Thanks,

Josh

Sure wish people would give the part number for these Cams...
Would save some time looking for the file..

Cam is a 11-460-8 Comps.
600 hp
564 tq
Dyno-Sim

Foot note: using a single plane.
654 hp
600 tq

 

[69-CHVL]

Change to small tube headers, seems to bring the #'s down to a more realistic #

 

[3V Performance]

I use the grand daddy to that program. Dyno-Sim Pro.
I have found the numbers are way to high compared to real life.
Seams like any thing over 500hp I have to remove 15%hp and 12%tq.

The last Dyno-Sim vs a real Dyno was on Mr. HorsePowers SBC.
My guess with Dyno-Sim was with in 1hp and 4tq.

Pretty much nailed it...

You should run my 496 pump gas build and see how you do on that one to. I have real dyno numbers to compare.

my guess 575hp / 600tq
I would get the heads flowed to make sure they flow what they say. A friend did a set and they needed help.
Tom

 

[BigRat09]

Here are the flow numbers for the AS-CAST BBC models from Patriot Performance.

The models I intend to use will have Ti retainers and Full CNC porting.

And you were correct... the Comp Cams part no. is 11-460-8.

Thanks for your help!:thumbsup:

 

[Mikeys69]

Here are the flow numbers for the AS-CAST BBC models from Patriot Performance.

The models I intend to use will have Ti retainers and Full CNC porting.

And you were correct... the Comp Cams part no. is 11-460-8.

Thanks for your help!:thumbsup:

Yes I already used these flow numbers.
With the earlier post, and the valve sizes.

Be nice to have some deck height numbers, flat top, dome, dished pistons ???
Head gasket being used (compressed height) and bore size of gasket.
What headers are you using??? Stepped non stepped...???

Then I can fine tune the program...:thumbsup:

 

[Mikeys69]

Pretty much nailed it...

You should run my 496 pump gas build and see how you do on that one to. I have real dyno numbers to compare.

my guess 575hp / 600tq
I would get the heads flowed to make sure they flow what they say. A friend did a set and they needed help.
Tom

Sure give me the numbers...Love too...:yes: