496 to be DYNO'D! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69GMC910 · 02-25-2012, 12:43 AM

Please make yer estimates for HP and TQ! Engine should hit the dyno this wknd or early next week.

496
10.2CR
AFR 265's
.578I
.608E
RPM Air Gap
850 Holley

Closest guess wins a virtual high five!

910

69GMC910 · 02-25-2012, 07:32 PM

Wow, tough crowd...!

lyrikz · 02-25-2012, 07:34 PM

Quote:

Originally Posted by 69GMC910

Wow, tough crowd...!

Slow on saturdays.

My guess is 725hp

Blue Rat · 02-25-2012, 07:40 PM

Well 680 is my guess.

69GMC910 · 02-25-2012, 07:53 PM

Now we're cookin! Keep em comin!!!

Bad70sbchevy · 02-25-2012, 09:43 PM

651.3hp to the flywheel

fastwillie 696969 · 02-25-2012, 09:49 PM

574=500

68longhorn · 02-25-2012, 10:15 PM

541

gearys 5600 · 02-26-2012, 03:18 PM

590 H.P

I built a couple of 496's a few years ago and one of them was real similar to yours with the exception of intake and carb ( victor jr and 950 h.p holley ) it made 620 H.P

Congrats on the new engine.

69GMC910 · 02-26-2012, 03:26 PM

Thanks! Gonna be a HUGE change going from sb to bb!

77BBGMC · 02-28-2012, 12:44 AM

595 hp
640 tq
Posted via Mobile Device

Super73 · 02-28-2012, 02:04 AM

Got any more specs on the cam?
Hyd Flat Tappet? Hyd Roller? Solid Roller?
.050 numbers?
Intake Center Line
Lobe seperation?

69GMC910 · 02-28-2012, 03:28 AM

Cam is a hyd roller, Isky p/n 696284/294
Posted via Mobile Device

Super73 · 02-28-2012, 02:23 PM

Sorry, one more question, what headers? Diameter and length if you have both.

69GMC910 · 02-28-2012, 02:28 PM

Hooker headers, long tube, 2" primary, 3 1/2 collector.
Posted via Mobile Device

Super73 · 02-28-2012, 08:06 PM

I set the cam on an intake center of 108 since I could not find an advertised ICL.
I used a primary tube length of 30" for the header.
I used a generic Dualplane intake since there is no airgap in my program.
I used 91 Octane and a running temp of 165*

616ftlbs @ 4,400rpm
589hp @ 5,500rpm

FYI.. Moving from a 108icl to a 106 or even a 110 did not show much change.

Marv D · 02-28-2012, 09:20 PM

Quote:

Originally Posted by Super73

I set the cam on an intake center of 108 since I could not find an advertised ICL.
I used a primary tube length of 30" for the header.
I used a generic Dualplane intake since there is no airgap in my program.
I used 91 Octane and a running temp of 165*

616ftlbs @ 4,400rpm
589hp @ 5,500rpm

FYI.. Moving from a 108icl to a 106 or even a 110 did not show much change.

In that case,, I'm gonna guess 615.5 and 588.5 cause I know how you came up with those numbers LOL. One of us is going to be really close <grins>

69GMC910 · 02-28-2012, 08:26 PM

We'll see who's closest soon!!! Get yer guesses in people!!!!
Posted via Mobile Device

Super73 · 02-28-2012, 09:32 PM

Marv, I used stock clearences, stock windage etc. So it might be a little conservative. With out knowing all the details, I tried to error on the low side.

Blue Rat · 02-28-2012, 09:34 PM

I just got my dyno software installed yesterday an I see right now my software estimate an Super73's is right with each other.

Super73 · 02-28-2012, 09:39 PM

What program are you running?

68 C-10 KID · 02-29-2012, 12:03 AM

We ran a BBC on a super flow dyno with steel RHS heads and a solid roller that's in the .660's for lift with dual 750's it put up all most 700 HP.
You have a very nice head and comp ratio.
MY W.A.G is 640HP

RICKSRAT · 02-29-2012, 08:41 AM

640hp/620tq

69GMC910 · 02-29-2012, 06:35 PM

Short delay on the dyno.... Should be friday or saturday...!
Posted via Mobile Device

*Vortecpro* · 03-05-2012, 11:54 PM

Quote:

Originally Posted by 69GMC910

Short delay on the dyno.... Should be friday or saturday...!
Posted via Mobile Device

Sorry for the delay on my end, having some problems with my dyno, I think we have figured it out and will have some numbers soon, the cam is 570 608 238/248, BTW my guess is 700, any way you want to look at it, your truck could run 10s with this very streetable engine.

02-25-2012, 12:43 AM	#1
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	496 to be DYNO'D! Please make yer estimates for HP and TQ! Engine should hit the dyno this wknd or early next week. 496 10.2CR AFR 265's .578I .608E RPM Air Gap 850 Holley Closest guess wins a virtual high five! 910 __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-25-2012, 07:32 PM	#2
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Wow, tough crowd...! __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-25-2012, 07:40 PM	#4
Blue Rat Registered User Join Date: Dec 2010 Location: Arkansas Posts: 608	Re: 496 to be DYNO'D! Well 680 is my guess.

02-25-2012, 07:53 PM	#5
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Now we're cookin! Keep em comin!!! __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-25-2012, 09:43 PM	#6
Bad70sbchevy Registered User Join Date: Aug 2009 Location: Newberry,FL Posts: 277	Re: 496 to be DYNO'D! 651.3hp to the flywheel __________________ 1970 Chevrolet C-10 w/355sbc 2010 Silverado Daily Driver 1971 Mercedes 280sl project car

02-25-2012, 09:49 PM	#7
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: 496 to be DYNO'D! 574=500 __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

02-25-2012, 10:15 PM	#8
68longhorn Registered User Join Date: Jun 2007 Location: Cape Coral, Florida Posts: 1,123	Re: 496 to be DYNO'D! 541 __________________ 1986 Custom Deluxe 10 1978 Caprice 2 door - sold 1937 Chevrolet 2 door sedan - project

02-26-2012, 03:18 PM	#9
gearys 5600 Registered User Join Date: Mar 2010 Location: tulsa,ok Posts: 1,085	Re: 496 to be DYNO'D! 590 H.P I built a couple of 496's a few years ago and one of them was real similar to yours with the exception of intake and carb ( victor jr and 950 h.p holley ) it made 620 H.P Congrats on the new engine. __________________ MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=423629 1969 custom/10 swb--SOLD 1968 swb 50th anniv.--SOLD 1967 camaro ss/rs..LS-6-speed, 16-year long project 1956 chevy nomad 1955 chevy 210 2-dr sedan 1978 el-camino ss 1-owner

02-26-2012, 03:26 PM	#10
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Thanks! Gonna be a HUGE change going from sb to bb! __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-28-2012, 12:44 AM	#11
77BBGMC Registered User Join Date: May 2009 Location: Kansas Posts: 357	Re: 496 to be DYNO'D! 595 hp 640 tq Posted via Mobile Device

02-28-2012, 02:04 AM	#12
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! Got any more specs on the cam? Hyd Flat Tappet? Hyd Roller? Solid Roller? .050 numbers? Intake Center Line Lobe seperation? __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

02-28-2012, 03:28 AM	#13
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Cam is a hyd roller, Isky p/n 696284/294 Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-28-2012, 02:23 PM	#14
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! Sorry, one more question, what headers? Diameter and length if you have both. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

02-28-2012, 02:28 PM	#15
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Hooker headers, long tube, 2" primary, 3 1/2 collector. Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-28-2012, 08:06 PM	#16
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! I set the cam on an intake center of 108 since I could not find an advertised ICL. I used a primary tube length of 30" for the header. I used a generic Dualplane intake since there is no airgap in my program. I used 91 Octane and a running temp of 165* 616ftlbs @ 4,400rpm 589hp @ 5,500rpm FYI.. Moving from a 108icl to a 106 or even a 110 did not show much change. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49



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02-28-2012, 08:26 PM	#18
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! We'll see who's closest soon!!! Get yer guesses in people!!!! Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

02-28-2012, 09:32 PM	#19
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! Marv, I used stock clearences, stock windage etc. So it might be a little conservative. With out knowing all the details, I tried to error on the low side. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

02-28-2012, 09:34 PM	#20
Blue Rat Registered User Join Date: Dec 2010 Location: Arkansas Posts: 608	Re: 496 to be DYNO'D! I just got my dyno software installed yesterday an I see right now my software estimate an Super73's is right with each other.

02-28-2012, 09:39 PM	#21
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! What program are you running? __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

02-29-2012, 12:03 AM	#22
68 C-10 KID Mean Green Join Date: Sep 2007 Location: Portland, OR Posts: 522	Re: 496 to be DYNO'D! We ran a BBC on a super flow dyno with steel RHS heads and a solid roller that's in the .660's for lift with dual 750's it put up all most 700 HP. You have a very nice head and comp ratio. MY W.A.G is 640HP __________________ 427 SBC 683HP & 590ftlbsTRQ @ fly wheel. 60'-1.38 1/4-10.43 MPH-124.6 New ET current 4/2019 AKA MEAN GREEN.

02-29-2012, 08:41 AM	#23
RICKSRAT Registered User Join Date: Apr 2000 Location: LAKE JACKSON TEXAS Posts: 343	Re: 496 to be DYNO'D! 640hp/620tq __________________ '72 SWB 3,600# Indigo Blue , Sunset Racing Pump Gas 582" 1,002hp / 833tq ,Transking 400 W/ Transbrake, Moser Dana 60 w/4.30 Old Motor: 60'. 1.43 1/8 6.58@104.64 1/4. 10.42@127.10 Nitrous: 60'. 1.28 1/8. 6.15@ 112.02 1/4. 9.75@ 136.32

02-29-2012, 06:35 PM	#24
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Short delay on the dyno.... Should be friday or saturday...! Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

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