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!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.