BBC Horsepower??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

custom72c20 · 01-06-2009, 02:15 AM

An ideas on how much power this motor makes?

468 BBC
10:1 compression with forged pistons
090 casting ovals that are mildly ported
solid roller cam with around 660 lift and a lot of duration
stock rods
stock crank
edelbrock victor junior single plane intake
800cfm holley
pertronix distributor

It runs like a bat outta hell, just not sure on the actual numbers. Im guessing around 450? Let me know what you think. Thanks

Alex1 · 01-06-2009, 09:13 AM

Could be a bit more than 450hp.

drag_72 · 01-06-2009, 10:48 AM

im thinkin like 500 or 550? or more never know?

custom72c20 · 01-07-2009, 12:13 AM

Im suprised that you guys think it makes more power. haha. I was kinda shootin low though. I think the cam is a little big for the heads, but it sure does sound nasty. Anyone got any cheap ways I can sqeeze a little more power outta her. Thanks.

ripdog28 · 01-07-2009, 04:03 PM

I doubt 550. Possibly 500 but im thinking 450+. Those heads are lacking. Ported and all they were never meant to flow well even with a roller cam. If you spent the $600+ on a cam why did you waste the money porting? after market Iron is cheap and will flow a ton more then those ported stocks will. Those heads are good for good low end TQ but not that great for high HP.

custom72c20 · 01-07-2009, 10:32 PM

Quote:

Originally Posted by ripdog28

I doubt 550. Possibly 500 but im thinking 450+. Those heads are lacking. Ported and all they were never meant to flow well even with a roller cam. If you spent the $600+ on a cam why did you waste the money porting? after market Iron is cheap and will flow a ton more then those ported stocks will. Those heads are good for good low end TQ but not that great for high HP.

I wasn't planning on running that cam when I was building the motor, but my friend who grinds cams had it laying on the shelf and gave it to me. Once I drop it in the truck, I'll take a video of it.

LuckyHenriksen · 01-07-2009, 11:15 PM

Sounds like a nice motor. I like nasty cams

69trk · 01-07-2009, 11:46 PM

i'm thinking around 525 or more.

custom72c20 · 01-08-2009, 12:28 AM

Quote:

Originally Posted by 69trk

i'm thinking around 525 or more.

Thanks for the input.

racyn68 · 01-11-2009, 08:05 AM

I entered your engine specs in my computer Dyno2000 engine simulation. It should make 500 to 550 hp. If I had more specifics on the cam, I could get a closer figure for you. I assumed stock valves (2.06/1.72) with some pocket porting.

Ray

custom72c20 · 01-11-2009, 03:34 PM

Quote:

Originally Posted by racyn68

I entered your engine specs in my computer Dyno2000 engine simulation. It should make 500 to 550 hp. If I had more specifics on the cam, I could get a closer figure for you. I assumed stock valves (2.06/1.72) with some pocket porting.

Ray

cool. Thanks. I'll see if I can find the cam card.

djracer · 01-11-2009, 08:19 PM

Quote:

Originally Posted by racyn68

I entered your engine specs in my computer Dyno2000 engine simulation. It should make 500 to 550 hp. If I had more specifics on the cam, I could get a closer figure for you. I assumed stock valves (2.06/1.72) with some pocket porting.

Ray

Welcome to the board!

PhilaTruck · 01-13-2009, 10:27 PM

Ray: Welcome to the board from Philadelphia.

Nick: You didn't mention the rear ratio. That's one of the cheapest ways to get grunt. Looks like you gotta change your siggy since you're enjoying your bbc.

Nice truck, BTW-

-Todd

custom72c20 · 01-15-2009, 10:47 PM

Quote:

Originally Posted by PhilaTruck

Ray: Welcome to the board from Philadelphia.

Nick: You didn't mention the rear ratio. That's one of the cheapest ways to get grunt. Looks like you gotta change your siggy since you're enjoying your bbc.

Nice truck, BTW-

-Todd

It's got 4.56 gears, so it leaves in a hurry. Haha. Hope fully I can get some pics and video of it soon.

PhilaTruck · 01-16-2009, 08:07 PM

After I wrote that I figured with that compression and duration, you'd probably have decent gears.

Always looking forward to vids!

01-06-2009, 02:15 AM	#1
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	BBC Horsepower??? An ideas on how much power this motor makes? 468 BBC 10:1 compression with forged pistons 090 casting ovals that are mildly ported solid roller cam with around 660 lift and a lot of duration stock rods stock crank edelbrock victor junior single plane intake 800cfm holley pertronix distributor It runs like a bat outta hell, just not sure on the actual numbers. Im guessing around 450? Let me know what you think. Thanks __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

01-06-2009, 09:13 AM	#2
Alex1 Registered User Join Date: Jul 2007 Location: Ottawa Ontario Canada Posts: 1,156	Re: BBC Horsepower??? Could be a bit more than 450hp.

01-06-2009, 10:48 AM	#3
drag_72 Ready to go fast!! Join Date: Aug 2008 Location: Carthage,Mo Posts: 219	Re: BBC Horsepower??? im thinkin like 500 or 550? or more never know? __________________ 454 block .30 forged aluminum pistons steel crank valve job Holley Strip Dominator intake 1030cfm holley carb, 250 plate shot roller rockers Erson Solid cam split duration 307/310. .575/.595 lift milodon oil pan fab. aluminum valve covers 4 bolt main splayed anodized caps all studded

01-07-2009, 12:13 AM	#4
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	Re: BBC Horsepower??? Im suprised that you guys think it makes more power. haha. I was kinda shootin low though. I think the cam is a little big for the heads, but it sure does sound nasty. Anyone got any cheap ways I can sqeeze a little more power outta her. Thanks. __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

01-07-2009, 04:03 PM	#5
ripdog28 Registered User Join Date: Apr 2008 Location: Imperial Beach, CA Posts: 1,040	Re: BBC Horsepower??? I doubt 550. Possibly 500 but im thinking 450+. Those heads are lacking. Ported and all they were never meant to flow well even with a roller cam. If you spent the $600+ on a cam why did you waste the money porting? after market Iron is cheap and will flow a ton more then those ported stocks will. Those heads are good for good low end TQ but not that great for high HP. __________________ 69 c-10 BBC 462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.

01-07-2009, 11:15 PM	#7
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Re: BBC Horsepower??? Sounds like a nice motor. I like nasty cams __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here

01-07-2009, 11:46 PM	#8
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: BBC Horsepower??? i'm thinking around 525 or more. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=494388 431 big block times, changed to a 6.0 ls with turbo 1.58- 60' 7.18- 1/8th mile@95.18 11.37- 1/4 @115.81

01-11-2009, 08:05 AM	#10
racyn68 Registered User Join Date: Jul 2007 Location: Clayton, NC Posts: 1	Re: BBC Horsepower??? I entered your engine specs in my computer Dyno2000 engine simulation. It should make 500 to 550 hp. If I had more specifics on the cam, I could get a closer figure for you. I assumed stock valves (2.06/1.72) with some pocket porting. Ray

01-13-2009, 10:27 PM	#13
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: BBC Horsepower??? Ray: Welcome to the board from Philadelphia. Nick: You didn't mention the rear ratio. That's one of the cheapest ways to get grunt. Looks like you gotta change your siggy since you're enjoying your bbc. Nice truck, BTW- -Todd __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

01-16-2009, 08:07 PM	#15
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: BBC Horsepower??? After I wrote that I figured with that compression and duration, you'd probably have decent gears. Always looking forward to vids! __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!



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