BBC Dailey Driver Cam Recommendation
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,470
Likes: 18
From: Lake Ozark, MO
BBC Dailey Driver Cam Recommendation
Looking to remove my COMP HE274 cam from my 454 (with automatic tranny) and put in something more "drivable" for my wife. What would be a good cam to make some decent power but still be streetable and have good manners with the automatic transmission?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Your XE274 is 230/236 dropping down to this might work great. or even one step below this.
New Street Master Cam - Chevrolet Big Block 280/288
Product Description
Lunati's latest lobe design for the Street Master camshaft. These camshafts are computer designed to take advantage of maximum area under the curve without destroying valve train components.
Hydraulic, lopey idle. Excellent cam for high performance street applications. Works well in 396-454 cubic inch motors.
Advertised Duration (Int/Exh): 280/288
Duration @ .050 (Int/Exh): 223/231
Gross Valve Lift (Int/Exh): .525/.550
LSA/ICL: 112/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2000-6000
Includes: Cam Only
Part Number: 302A7LUN
New Street Master Cam - Chevrolet Big Block 280/288
Product Description
Lunati's latest lobe design for the Street Master camshaft. These camshafts are computer designed to take advantage of maximum area under the curve without destroying valve train components.
Hydraulic, lopey idle. Excellent cam for high performance street applications. Works well in 396-454 cubic inch motors.
Advertised Duration (Int/Exh): 280/288
Duration @ .050 (Int/Exh): 223/231
Gross Valve Lift (Int/Exh): .525/.550
LSA/ICL: 112/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2000-6000
Includes: Cam Only
Part Number: 302A7LUN
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
One of Comp's Magnum 270 cams would be a good fit for you.
Specs are
Lift - .510
Adv dur - 270
Dur @ .050" - 224
LSA 110 °
RPM range 1500 - 5800
Its big enough to "hear the cam" just a little, but small enough to drive evrywhere.
Specs are
Lift - .510
Adv dur - 270
Dur @ .050" - 224
LSA 110 °
RPM range 1500 - 5800
Its big enough to "hear the cam" just a little, but small enough to drive evrywhere.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,470
Likes: 18
From: Lake Ozark, MO
More info. is needed like intake, heads, exhaust.
RPM range 1500 - 5800
Its big enough to "hear the cam" just a little, but small enough to drive evrywhere
Its big enough to "hear the cam" just a little, but small enough to drive evrywhere
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Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Note that BB's tend to like extra exhaust duration. Also, for a DD I'd caution to avoid the tight LSA trap, and to go with at least 110* (more if you're ever likely to spray). FYI, lots of cam advance will increase DCR, and thus likely your minimum octane requirement. My $.02.
Last edited by TheSkunkWorks; Apr 27, 2009 at 05:12 PM.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Note that BB's tend to like extra exhaust duration. Also, for a DD I'd caution to avoid the tight LSA trap, and to go with at least 110* (more if you're ever likely to spray). FYI, lots of cam advance will increase DCR, and thus likely your minimum octane requirement. My $.02.
low rpm ranges that a daily driver is going to operate in, and will cost you some low rpm torque.
Also, cautioning someone against raising DCR doesnt make sense.
As long as the car will run on available pump gas, more cylinder pressure will result in more power.
Acting like raising DCR is a bad thing is like saying nobody should ever run a higher compression ratio.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
While extra exhaust duration is a benefit in higher rpm ranges, its not near as important at the
low rpm ranges that a daily driver is going to operate in, and will cost you some low rpm torque.
Also, cautioning someone against raising DCR doesnt make sense.
As long as the car will run on available pump gas, more cylinder pressure will result in more power.
Acting like raising DCR is a bad thing is like saying nobody should ever run a higher compression ratio.
low rpm ranges that a daily driver is going to operate in, and will cost you some low rpm torque.
Also, cautioning someone against raising DCR doesnt make sense.
As long as the car will run on available pump gas, more cylinder pressure will result in more power.
Acting like raising DCR is a bad thing is like saying nobody should ever run a higher compression ratio.
However, please read my post and tell me exactly where I said higher DCR was a "bad thing". I was merely pointing out a likely result form closing the intake earlier. Do you disagree with the logic that for an engine on the edge at a given octane, a higher DCR would typically require more octane?
Last edited by TheSkunkWorks; Apr 27, 2009 at 08:34 PM.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
As for exhaust duration, I stand behind my observation, as the additional top end power may be gained with little relative cost to bottom end if the timing of the exhaust event is placed correctly, but I will add the qualifier that whether this is worth doing does depend on intended purposes and on the exhaust system in question.
However, please read my post and tell me exactly where I said higher DCR was a "bad thing". I was merely pointing out a likely result form closing the intake earlier. Do you disagree with the logic that for an engine on the edge at a given octane, a higher DCR would typically require more octane?
However, please read my post and tell me exactly where I said higher DCR was a "bad thing". I was merely pointing out a likely result form closing the intake earlier. Do you disagree with the logic that for an engine on the edge at a given octane, a higher DCR would typically require more octane?
that in the rpm range asked about a single pattern cam is also an appropriate choice.
For an engine on the edge of octane requirements you are correct about the DCR.
You didnt say it was a bad thing, but I felt like your statement implied that he should keep DCR low,
which in general is a bad idea up to the point that you have the octane available.
Instructor
Joined: Oct 2005
Posts: 157
Likes: 3
From: Silver Spring maryland
comp cam 268H
A friend help me put a comp cam in my 69 - 427-390 L36- auto. Nice lope at idle. We put in 216 intakes / 202 exhaust valves oval port mild polish measured on a flow bench and roller rockers. I have had this set up since 1998 and have put about 10 K miles on my car. Very happy with drivability and power, hope this helps.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
I am sure that there are dual pattern cams that will work great for Hvymtlc5, but I think
that in the rpm range asked about a single pattern cam is also an appropriate choice.
For an engine on the edge of octane requirements you are correct about the DCR.
You didnt say it was a bad thing, but I felt like your statement implied that he should keep DCR low,
which in general is a bad idea up to the point that you have the octane available.
that in the rpm range asked about a single pattern cam is also an appropriate choice.
For an engine on the edge of octane requirements you are correct about the DCR.
You didnt say it was a bad thing, but I felt like your statement implied that he should keep DCR low,
which in general is a bad idea up to the point that you have the octane available.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
A friend help me put a comp cam in my 69 - 427-390 L36- auto. Nice lope at idle. We put in 216 intakes / 202 exhaust valves oval port mild polish measured on a flow bench and roller rockers. I have had this set up since 1998 and have put about 10 K miles on my car. Very happy with drivability and power, hope this helps.
Melting Slicks
Joined: Jan 2003
Posts: 2,877
Likes: 13
From: Doha
St. Jude Donor '08
I've got a Lunati 60202 (Advertised Duration 262/ 268, Lift .530/ .542) Voodoo cam in my 454 engine (9:1 CR) and I'm very pleased with it, idles smoothly 1t 750 RPM (I do have a 2000 RPM stall torque converter) and performs very well esp. after 3K RPM. My previous cam was the comp. cams 268H, I like the new Lunati much more in terms of idle smoothness and performance.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,470
Likes: 18
From: Lake Ozark, MO
I've got a Lunati 60202 (Advertised Duration 262/ 268, Lift .530/ .542) Voodoo cam in my 454 .......
Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
