Question about a few cams
#1440702
05/22/13 11:01 PM
05/22/13 11:01 PM
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Joined: Jan 2003
Posts: 1,221 Jarrettsville, MD
tywebb2
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,221
Jarrettsville, MD
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The following cams were recommended to me and I am wondering the possible advantages/disadvantages of each compared against each other. All three are hydraulics and my existing 509 cam specs as well.
Hughes 3237bl, 540/548, 232/237 @050, 110 ls Hughes 3742bl, 548/592, 237/242 @050, 108 ls Racer brown ssh44, 510/510, 242/242 @050 Mopar 509, 509/509, 248/248 @050, 108
I noticed the Hughes would give me more lift for the same or less duration compared to the racer brown. Also the Hughes cams are higher lift on the exhaust than the intake and RB recommended 1.6 rockers on the intake and 1.5 on the exhaust with his cam. So when it comes to lift it appears the philosophies are opposite?
'72 440 Cuda 11.673 @ 115.91 w/1.663 60'
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Re: Question about a few cams
[Re: viperblue72]
#1440705
05/23/13 12:44 AM
05/23/13 12:44 AM
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Joined: Jan 2003
Posts: 1,221 Jarrettsville, MD
tywebb2
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,221
Jarrettsville, MD
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I am leaning toward pulling the engine to have it freshened up later this year. Have main studs installed, block zero decked, and either install new lightweight rods and pistons or just cut bigger reliefs in my existing trw's to get more ptv clearance and install arp bolts in existing ly rods. Then mill heads to get to 10.5:1 compression and do some mild port work. All stuff I regret not doing the first time around.
I just figured while I was at it I would look into cams to see if there was something that would give me better performance than the 509 and be a little more street friendly with my setup.
'72 440 Cuda 11.673 @ 115.91 w/1.663 60'
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Re: Question about a few cams
[Re: loaderpro]
#1440707
05/23/13 02:51 AM
05/23/13 02:51 AM
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Joined: Jan 2007
Posts: 7,664 IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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I think the main gain with the newer faster cams would be drivability from less duration... with more lift to help maintain power. How much the extra lift will help depends on your heads. Stock iron heads stall out at fairly low lifts. Aftermarket or ported iron heads respond better to more lift. If you go that route, stiffer springs may be needed to keep things under control depending on what you are starting with. Also careful attention to cam break in and high zinc oil to keep it happy. FWIW I run a solid flat tappet MM lobe in a 496. The ramps are as aggressive as possible (.55 lift, 243@.050 duration) and I love it.
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Re: Question about a few cams
[Re: 383man]
#1440710
05/23/13 12:32 PM
05/23/13 12:32 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
You could do what I did. I called Dwayne Porter and had a custom ground cam for my specific combo. He speced me a nice solid flat tappet and I love it. Ron
And let Dwayne do any freshen-up (valve job, etc.) work on your heads while you're at it.
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Re: Question about a few cams
[Re: Kevins493]
#1440712
05/23/13 01:58 PM
05/23/13 01:58 PM
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Joined: Jan 2003
Posts: 1,221 Jarrettsville, MD
tywebb2
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,221
Jarrettsville, MD
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My 509 cam is in at 102 and that helped out a lot. I did that a few years ago per the recommendation here. I have a 10" turbo action 3600 stall vert. Tried an 8" ATI in it previously and didn't really gain much except making the car less fun to drive in the street. I always thought about a 9.5" dynamic but never pulled the trigger after the lack of positive change with the 8".
Good suggestion....I will talk to Dwayne again about cams and see what he says.
Question..wouldn't it be better to run the hughes cam which has more lift with less duration when compared to the racer brown where he is suggesting to use 1.6 intake rockers to get additional lift from his cam? Just seems like it would be easier to stick with the 1.5's I already have and go with the cam that has more lift at a given duration?
'72 440 Cuda 11.673 @ 115.91 w/1.663 60'
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Re: Question about a few cams
[Re: tywebb2]
#1440713
05/23/13 03:09 PM
05/23/13 03:09 PM
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Joined: Feb 2006
Posts: 2,379 MD
Kevins493
top fuel
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top fuel
Joined: Feb 2006
Posts: 2,379
MD
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Car needs about 4200 stall with that cam. I think we ended up with a 10" converter in the Fury. Ran 11.74 with stock heads. Any 8" converter would likely flash wayyy too high for that combination. I would go with the cam with the faster ramps since you already have rockers. I would look into the comp MM series stuff. I would keep the duration in or near the 240@.050 range though.
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Re: Question about a few cams
[Re: Kevins493]
#1440714
05/23/13 03:24 PM
05/23/13 03:24 PM
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Joined: Jan 2003
Posts: 1,221 Jarrettsville, MD
tywebb2
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,221
Jarrettsville, MD
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4200 stall would be needed with which cam? My 10" TA vert flashes at 4200 fwiw.
'72 440 Cuda 11.673 @ 115.91 w/1.663 60'
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Re: Question about a few cams
[Re: 383man]
#1440717
05/23/13 08:46 PM
05/23/13 08:46 PM
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Joined: Jan 2003
Posts: 1,221 Jarrettsville, MD
tywebb2
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,221
Jarrettsville, MD
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Ive got Dwayne's number but thanks anyway Ron.
'72 440 Cuda 11.673 @ 115.91 w/1.663 60'
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