BBC cam opinions
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Teching In
Joined: Mar 2005
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BBC cam opinions Current engine build as follows:
489 BBC
10-1 compression
049 heads-3 angle valve job, fully ported, 2.19/1.88 valves, bowl job
holley 850 or 950
rpm airgap mainfold
headers with 2" primaries-3" exhaust
chassis=1968 camaro
th-350
3.73 posi
2800 stall
numerous suspension upgrades will be made.
I've been doing a lot of cam research and am just about set on this cam:
Lunati hydraulic roller 300/310, 242/252 @ .050, .595/.612, 110 LSA.
Lunati says it is good for 2500-6500 rpms. I've read that it is hard to kill torque in a stroked BBC and that a bigger cam with more lift and duration can be used. This car will be mainly a street bruiser with some strip time every so often. I like a rough idle and gas mileage is of min. concern. I only have power steering, no a/c, no power breaks. Will be just engine under the hood and that is it! I ran this cam on a computer simulator and it gave me the best power-572 hp and 590 lbs of torque. But I really value the opinions on this site and would like to hear what you all think before I make the purchase. Thanks everyone!
489 BBC
10-1 compression
049 heads-3 angle valve job, fully ported, 2.19/1.88 valves, bowl job
holley 850 or 950
rpm airgap mainfold
headers with 2" primaries-3" exhaust
chassis=1968 camaro
th-350
3.73 posi
2800 stall
numerous suspension upgrades will be made.
I've been doing a lot of cam research and am just about set on this cam:
Lunati hydraulic roller 300/310, 242/252 @ .050, .595/.612, 110 LSA.
Lunati says it is good for 2500-6500 rpms. I've read that it is hard to kill torque in a stroked BBC and that a bigger cam with more lift and duration can be used. This car will be mainly a street bruiser with some strip time every so often. I like a rough idle and gas mileage is of min. concern. I only have power steering, no a/c, no power breaks. Will be just engine under the hood and that is it! I ran this cam on a computer simulator and it gave me the best power-572 hp and 590 lbs of torque. But I really value the opinions on this site and would like to hear what you all think before I make the purchase. Thanks everyone!
Staging Lane
Joined: May 2005
Posts: 68
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That sounds like the perfect size for your application. I would personally go with a bigger one though. Try putting this one in your CP dyno. When my camaro was a streeter, I had a pretty hefty cam. I can't remember exact specs off hand, but something like this: Lift: .698/.700; Advertised Duration: 305/310. It was a real thumper. Nice setup by the way. 
Cuz I AM a BADMOFO
Joined: Apr 2003
Posts: 5,000
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From: Mission to Uranus
Crane makes a solid lifter cam .312/.312 like .648/.669. It sounds meaner than anything I've heard yet....believe me. If sound is what your after, this is your cam. You won't get the same sound out of hydraulic roller as you will with a solid lifter cam. I'd be curious to know what kind of power your desktop dyno rates this cam at....if you get a chance, try it and let me know.
Thread Starter
Teching In
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Originally Posted by BADMOFO
Crane makes a solid lifter cam .312/.312 like .648/.669. It sounds meaner than anything I've heard yet....believe me. If sound is what your after, this is your cam. You won't get the same sound out of hydraulic roller as you will with a solid lifter cam. I'd be curious to know what kind of power your desktop dyno rates this cam at....if you get a chance, try it and let me know.
Cuz I AM a BADMOFO
Joined: Apr 2003
Posts: 5,000
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From: Mission to Uranus
270-131541
Mechanical Flat Tappet Camshaft
Lift: .648''/.669''
Duration: 304°/312°
RPM Range: 4600-7600
*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
MODERATE COMPETITION ONLY, GOOD UPPER RPM HP, BRACKET RACING, AUTO TRANS W/RACE CONVERTER
Grind Number: F-268/3814-2S-8
Operating Range: 4600-7600 RPM
Duration Advertised: 304° Intake / 312° Exhaust
Duration @ .050'' Lift: 268° Intake / 276° Exhaust
Valve Lift w/1.7 Rockers: .648'' Intake / .669'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 29° BTDC (opens) / 59° ABDC (closes)
Exhaust - 69° BBDC (opens) / 27° ATDC (closes)
or.....
Grind Number: F-256/3634-2S-8
Operating Range: 4200-7000 RPM
Duration Advertised: 292° Intake / 300° Exhaust
Duration @ .050'' Lift: 256° Intake / 264° Exhaust
Valve Lift w/1.7 Rockers: .618'' Intake / .638'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 23° BTDC (opens) / 53° ABDC (closes)
Exhaust - 63° BBDC (opens) / 21° ATDC (closes)
Mechanical Flat Tappet Camshaft
Lift: .648''/.669''
Duration: 304°/312°
RPM Range: 4600-7600
*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
MODERATE COMPETITION ONLY, GOOD UPPER RPM HP, BRACKET RACING, AUTO TRANS W/RACE CONVERTER
Grind Number: F-268/3814-2S-8
Operating Range: 4600-7600 RPM
Duration Advertised: 304° Intake / 312° Exhaust
Duration @ .050'' Lift: 268° Intake / 276° Exhaust
Valve Lift w/1.7 Rockers: .648'' Intake / .669'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 29° BTDC (opens) / 59° ABDC (closes)
Exhaust - 69° BBDC (opens) / 27° ATDC (closes)
or.....
Grind Number: F-256/3634-2S-8
Operating Range: 4200-7000 RPM
Duration Advertised: 292° Intake / 300° Exhaust
Duration @ .050'' Lift: 256° Intake / 264° Exhaust
Valve Lift w/1.7 Rockers: .618'' Intake / .638'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 23° BTDC (opens) / 53° ABDC (closes)
Exhaust - 63° BBDC (opens) / 21° ATDC (closes)
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Thread Starter
Teching In
Joined: Mar 2005
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Originally Posted by BADMOFO
270-131541
Mechanical Flat Tappet Camshaft
Lift: .648''/.669''
Duration: 304°/312°
RPM Range: 4600-7600
*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
MODERATE COMPETITION ONLY, GOOD UPPER RPM HP, BRACKET RACING, AUTO TRANS W/RACE CONVERTER
Grind Number: F-268/3814-2S-8
Operating Range: 4600-7600 RPM
Duration Advertised: 304° Intake / 312° Exhaust
Duration @ .050'' Lift: 268° Intake / 276° Exhaust
Valve Lift w/1.7 Rockers: .648'' Intake / .669'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 29° BTDC (opens) / 59° ABDC (closes)
Exhaust - 69° BBDC (opens) / 27° ATDC (closes)
or.....
Grind Number: F-256/3634-2S-8
Operating Range: 4200-7000 RPM
Duration Advertised: 292° Intake / 300° Exhaust
Duration @ .050'' Lift: 256° Intake / 264° Exhaust
Valve Lift w/1.7 Rockers: .618'' Intake / .638'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 23° BTDC (opens) / 53° ABDC (closes)
Exhaust - 63° BBDC (opens) / 21° ATDC (closes)
Mechanical Flat Tappet Camshaft
Lift: .648''/.669''
Duration: 304°/312°
RPM Range: 4600-7600
*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
MODERATE COMPETITION ONLY, GOOD UPPER RPM HP, BRACKET RACING, AUTO TRANS W/RACE CONVERTER
Grind Number: F-268/3814-2S-8
Operating Range: 4600-7600 RPM
Duration Advertised: 304° Intake / 312° Exhaust
Duration @ .050'' Lift: 268° Intake / 276° Exhaust
Valve Lift w/1.7 Rockers: .648'' Intake / .669'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 29° BTDC (opens) / 59° ABDC (closes)
Exhaust - 69° BBDC (opens) / 27° ATDC (closes)
or.....
Grind Number: F-256/3634-2S-8
Operating Range: 4200-7000 RPM
Duration Advertised: 292° Intake / 300° Exhaust
Duration @ .050'' Lift: 256° Intake / 264° Exhaust
Valve Lift w/1.7 Rockers: .618'' Intake / .638'' Exhaust
Lobe Separation Angle: 108°
Max Lift Angle: 105° ATDC Intake / 111° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 23° BTDC (opens) / 53° ABDC (closes)
Exhaust - 63° BBDC (opens) / 21° ATDC (closes)
Thanks. Those are some BIG cams for a street car with occas. strip time! What would they drive like in a steet camaro with the engine I am building? Would I have any power/torque at all below 3000 rpm?
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i would go bigger also something around 269/276 @.050 with .685/.692 solid roller on a 110. this is a great street cam and makes incredible sound and power i had it in a 468 and it made over 700hp. #1 ditch the th350 and go th400 you're going to roast the th350 quick. #2 ditch the converter definetely not big enough at all the car will be a pig and lurch at stoplights go at least 4000. gears are ok but how big a tire are you putting on? #3 go with a single plane the motor is already going to make a ton of torque so whats the use of a dual plane air gap. #4 to small of a carb. start with an out of the box 1050 dominator and jet it about 88 square. # 5 i would go with a better head but they should work fine for the occ. strip car. #6 do at least a 2 1/4 primary to a 4" collector with 4 " flowmasters. once again you are making a ton of torque the small exhaust is going to make it worse while the bigger primaries will kill some torque and open up some top end horsepower. all in all do this combo based on your heads you'll have a great running street car that should make 600-625hp and traction dependent run high 10'slow 11's and with a good head 630-660hp and definately run high 10's about 125+
Thread Starter
Teching In
Joined: Mar 2005
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Originally Posted by 68maro
i would go bigger also something around 269/276 @.050 with .685/.692 solid roller on a 110. this is a great street cam and makes incredible sound and power i had it in a 468 and it made over 700hp. #1 ditch the th350 and go th400 you're going to roast the th350 quick. #2 ditch the converter definetely not big enough at all the car will be a pig and lurch at stoplights go at least 4000. gears are ok but how big a tire are you putting on? #3 go with a single plane the motor is already going to make a ton of torque so whats the use of a dual plane air gap. #4 to small of a carb. start with an out of the box 1050 dominator and jet it about 88 square. # 5 i would go with a better head but they should work fine for the occ. strip car. #6 do at least a 2 1/4 primary to a 4" collector with 4 " flowmasters. once again you are making a ton of torque the small exhaust is going to make it worse while the bigger primaries will kill some torque and open up some top end horsepower. all in all do this combo based on your heads you'll have a great running street car that should make 600-625hp and traction dependent run high 10'slow 11's and with a good head 630-660hp and definately run high 10's about 125+
Thread Starter
Teching In
Joined: Mar 2005
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Originally Posted by 68maro
you have 489 cubic inches trust me it will be a killer street combo.
Staging Lane
Joined: Oct 2004
Posts: 90
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If you don't mind, how much did it cost you to port your heads and rebuild them with the bigger valves and all that. I have 049 heads too and I was thinking about doing the same thing. I just don't want to be completely shocked when I ask the engine man for an estimate. Sounds like killer engine, I wish i had one of those.
Thread Starter
Teching In
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Originally Posted by jarediocamaro
If you don't mind, how much did it cost you to port your heads and rebuild them with the bigger valves and all that. I have 049 heads too and I was thinking about doing the same thing. I just don't want to be completely shocked when I ask the engine man for an estimate. Sounds like killer engine, I wish i had one of those.
-installation of bronze valve guides.
-installation of bigger valves.
-4 angle valve job.
-complete pocket porting/bowl porting
-complete porting of intake and exhaust ports
-intake and exhaust gasket matching.
-combustion chamber clean-up.
-heads will be completely assembled with all the parts.
-He said he is porting my heads the exact way he would do a race engine.
Total cost for all the porting and complete head assembly is $500.00! I've been told that the porting work alone could easily cost $1000.00 elsewhere. This guy works for Kennedy Space Center and does this for more of a hobby these days. I'm in no hurry to get these back so he has all the time he needs. So I figure for a bit less than $1000 total cost (including all parts above and labor), I'll have a fully race ported, large valved set of 049s.!!
