Voodoo Anyone??
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
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From: Marietta ga
Voodoo Anyone??
Alright, I am interested in changing cams. My motor runs out of breath at a little over 6000 RPMs. I am suspecting that my heads, cam or my carb is too small.
355ci SBC
10.5~7:1 compression
Double Humps - old school, but well ported and have a good valve job
Edlebrock Performer RPM AIR GAP - Port matched to heads
Street Demon 650 Mech Sec (I could never get the 750 to run right)
Comp XE274h - 230/236 on 110
Hooker Sidepipes - the double humps were matched to these when I had them ported
I am looking at 2 Voodoo Cams - one is a flat tappet and one is a roller
Roller: 243/251 @ .050, 560"/.565" lift, 110/106 LSA/ICL, 2800-6800
Flat: 241/249 @ .050, .525"/.546" lift, 110/106 LSA/ICL, 2500-6600
These seem big for my heads and Carb but the next smaller cam is too similar to the XE274 I already have... Any suggestions??? What about a custom grind?
355ci SBC
10.5~7:1 compression
Double Humps - old school, but well ported and have a good valve job
Edlebrock Performer RPM AIR GAP - Port matched to heads
Street Demon 650 Mech Sec (I could never get the 750 to run right)
Comp XE274h - 230/236 on 110
Hooker Sidepipes - the double humps were matched to these when I had them ported
I am looking at 2 Voodoo Cams - one is a flat tappet and one is a roller
Roller: 243/251 @ .050, 560"/.565" lift, 110/106 LSA/ICL, 2800-6800
Flat: 241/249 @ .050, .525"/.546" lift, 110/106 LSA/ICL, 2500-6600
These seem big for my heads and Carb but the next smaller cam is too similar to the XE274 I already have... Any suggestions??? What about a custom grind?
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
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From: Marietta ga
I got a good deal on porting the heads and intake at the same time from a friend. I spent much less on my old heads than it would have cost me to buy a set of afr's. The performance will never come close to a modern head, but the price was right at the time. I also got new guides, bigger valves, and all the other goodies.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Go with the hyd. roller they give a wider power band, use a
Hydra-rev with that much duration and lift. Even ported get
rid of your heads they will never let the cam do its job. you will
love the cam you picked with good heads and if moneys tight
run them but keep the cam specs you picked out. you don't
have an auto with no stall do you??
Hydra-rev with that much duration and lift. Even ported get
rid of your heads they will never let the cam do its job. you will
love the cam you picked with good heads and if moneys tight
run them but keep the cam specs you picked out. you don't
have an auto with no stall do you??
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
Likes: 0
From: Marietta ga
4sp with 3.73's
I love my cam now (xe274), but I am looking for a little more RPM. Does anyone have experience with these voodoo cams?? I have always been a comp guy in the past.
Thanks Little Mouse,
I would definately prefer to go with the roller, and I am aware of their benifits. If I go with a roller set up, I won't be able to afford heads for a little while longer.
I love my cam now (xe274), but I am looking for a little more RPM. Does anyone have experience with these voodoo cams?? I have always been a comp guy in the past.
Thanks Little Mouse,
I would definately prefer to go with the roller, and I am aware of their benifits. If I go with a roller set up, I won't be able to afford heads for a little while longer.
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
No expierence with Lunati, but I too am trying to pick from their Voodoo line for my 406 build. Like you, one flat tappet, one roller (but smaller). I like the power curve Voodoo offers for streetablity. Lunati has been in business almost as long as I've been alive. Been around since the 60's so I certainly will put my trust in expierence & longevity. Good luck with you choice...keep us posted. I will do the same.
Eddie
Eddie
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Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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The Voodoo line of cams were designed by Harold Brookshire. He used to own Ultradyne cams for years as well as I believe he worked for Comp way back when.
Harold's cam designs typically have assymetrical lobes...meaning they are different on opening and closing sides. He opens the valves relatively slowly initially off the seat to the .050 number everyone uses, but then goes very fast after that and by .200 he will be way ahead of most other cams. What this means is that he reduces reversion into intake tract by having valve not as far off the seat just before TDC, but when it starts going down he really opens it fast. Net result is better manners and more power. He also designs those cams with a closing side that sets valve down at the end very near stock type rates. That means no Xtreme type vlavetrain noise.
Good stuff!
All that said...there is no way I would spend the money to install a hyd roller assy with those heads. Yes it will run better...but the $$ spent could almost buy you a decent set of new heads. You will gain much more power with heads and a flat tappet than you will with a hyd roller and double humps. Also much more RPM potential!!
JIM
Harold's cam designs typically have assymetrical lobes...meaning they are different on opening and closing sides. He opens the valves relatively slowly initially off the seat to the .050 number everyone uses, but then goes very fast after that and by .200 he will be way ahead of most other cams. What this means is that he reduces reversion into intake tract by having valve not as far off the seat just before TDC, but when it starts going down he really opens it fast. Net result is better manners and more power. He also designs those cams with a closing side that sets valve down at the end very near stock type rates. That means no Xtreme type vlavetrain noise.
Good stuff!
All that said...there is no way I would spend the money to install a hyd roller assy with those heads. Yes it will run better...but the $$ spent could almost buy you a decent set of new heads. You will gain much more power with heads and a flat tappet than you will with a hyd roller and double humps. Also much more RPM potential!!
JIM
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
Likes: 0
From: Marietta ga
Thanks Jim, great info on the voodoo cams. I was skeptical of the voodoos at first. I had a friend that was working at Lunati when mr.gasket/holley bought them. He had given me a lot of warnings about how lunati was being ran since the buy out. It is good to get a positive recomendation from a forum member.
I know my heads, cam and carb are a bottle neck. I want to go with a bigger cam and set of heads. What heads would match the roller I am looking at?
I know my heads, cam and carb are a bottle neck. I want to go with a bigger cam and set of heads. What heads would match the roller I am looking at?
Originally Posted by 427Hotrod
The Voodoo line of cams were designed by Harold Brookshire. He used to own Ultradyne cams for years as well as I believe he worked for Comp way back when.
Harold's cam designs typically have assymetrical lobes...meaning they are different on opening and closing sides. He opens the valves relatively slowly initially off the seat to the .050 number everyone uses, but then goes very fast after that and by .200 he will be way ahead of most other cams. What this means is that he reduces reversion into intake tract by having valve not as far off the seat just before TDC, but when it starts going down he really opens it fast. Net result is better manners and more power. He also designs those cams with a closing side that sets valve down at the end very near stock type rates. That means no Xtreme type vlavetrain noise.
Good stuff!
All that said...there is no way I would spend the money to install a hyd roller assy with those heads. Yes it will run better...but the $$ spent could almost buy you a decent set of new heads. You will gain much more power with heads and a flat tappet than you will with a hyd roller and double humps. Also much more RPM potential!!
JIM
Harold's cam designs typically have assymetrical lobes...meaning they are different on opening and closing sides. He opens the valves relatively slowly initially off the seat to the .050 number everyone uses, but then goes very fast after that and by .200 he will be way ahead of most other cams. What this means is that he reduces reversion into intake tract by having valve not as far off the seat just before TDC, but when it starts going down he really opens it fast. Net result is better manners and more power. He also designs those cams with a closing side that sets valve down at the end very near stock type rates. That means no Xtreme type vlavetrain noise.
Good stuff!
All that said...there is no way I would spend the money to install a hyd roller assy with those heads. Yes it will run better...but the $$ spent could almost buy you a decent set of new heads. You will gain much more power with heads and a flat tappet than you will with a hyd roller and double humps. Also much more RPM potential!!
JIM
Burning Brakes
Joined: Mar 2006
Posts: 1,036
Likes: 2
From: Huntingburg Indiana
The voodoo cams are great. I put one in my 78 4x4 and it runs great. I also installed one in my 71 vette engine which is going back in this weekend. I am confident that it will impress me.
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