Need cam -Stroker motor
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,022
Likes: 6
From: CT
Need cam -Stroker motor
Next summer I'm going to build a budget stroker short block. I was planning on a 383 but might go with a 3.875" stroke and built a 396ci instead. I'm only going to have about $2,000-$2,500 to spend on the new motor so I'm gonna have use my current top end. I need suggestions on what type of cam I should get. I want to make as much power as I can; the car is a street car but will go to the track from time to time.
Here is my setup:
10:1 compression
Sportsman II heads
Edelbrock RPM intake
750 Speed Demon
The car is a 4 speed with 3.73 gears.
Here is my setup:
10:1 compression
Sportsman II heads
Edelbrock RPM intake
750 Speed Demon
The car is a 4 speed with 3.73 gears.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
YOu want a roller cam for the street for a 383ci then a CC XR274R would be my recommnendation. YOu would nedd to port the heads to get the full benefit of this cam. Tire shredding power and you will think it's a mild mannered reporter until you hit the happy pedal.
If no roller then XE 274 or the next one up would be nice.
If no roller then XE 274 or the next one up would be nice.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,022
Likes: 6
From: CT
Motorhead:
I was thinking about port and polishing my heads myself with a kit from summit. Is that XR274R a solid Roller cam?
I think the specs are something like: @.050" 236/242 .560/.570 110 LSA
What kind of horsepower do you think I would get out of my combo with this cam?
I was thinking about port and polishing my heads myself with a kit from summit. Is that XR274R a solid Roller cam?
I think the specs are something like: @.050" 236/242 .560/.570 110 LSA
What kind of horsepower do you think I would get out of my combo with this cam?
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
You can get books on DIY head porting or look on the internet. Here is link for basic head porting that you can do and not mess up your heads without a flow bench, http://www.sa-motorsports.com/diyport.shtm
The XR274R is solid roller I would not go any bigger and this cam is really pushing it with Sportsman II heads, a big solid roller really needs big heads as you can get lifts into the 0.600 in. range. Check the max lift on the heads first you might be better off with a flat tappet cam.
Horse power in your case is limited by the heads but you should be able to get ~ 450 HP
The XR274R is solid roller I would not go any bigger and this cam is really pushing it with Sportsman II heads, a big solid roller really needs big heads as you can get lifts into the 0.600 in. range. Check the max lift on the heads first you might be better off with a flat tappet cam.
Horse power in your case is limited by the heads but you should be able to get ~ 450 HP
Last edited by MotorHead; Oct 16, 2004 at 10:18 PM.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I posted in your other thread and I noticed when I ran your cam choices through Desktop Dyno that all those cams would get close to 40 HP more if you'd go with 215cc heads instead of 200cc heads...
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by MotorHead
You can get books on DIY head porting or look on the internet. Here is link for basic head porting that you can do and not mess up your heads without a flow bench, http://www.sa-motorsports.com/diyport.shtm
The XR274R is solid roller I would not go any bigger and this cam is really pushing it with Sportsman II heads, a big solid roller really needs big heads as you can get lifts into the 0.600 in. range. Check the max lift on the heads first you might be better off with a flat tappet cam.
Horse power in your case is limited by the heads but you should be able to get ~ 450 HP
The XR274R is solid roller I would not go any bigger and this cam is really pushing it with Sportsman II heads, a big solid roller really needs big heads as you can get lifts into the 0.600 in. range. Check the max lift on the heads first you might be better off with a flat tappet cam.
Horse power in your case is limited by the heads but you should be able to get ~ 450 HP
ooops - I posted before I saw this post...
The heads are definetely too small for some of the bigger cams..
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Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,022
Likes: 6
From: CT
thanks for the help guys
I think I might port and polish my sportsman II heads and then I could always upgrade to better heads later on.
As for the cam, I just checked the info. on my valve spring and they are rated at .560" max lift. So I guess the XR274R is too big unless I change to stronger springs.
I think I might port and polish my sportsman II heads and then I could always upgrade to better heads later on.
As for the cam, I just checked the info. on my valve spring and they are rated at .560" max lift. So I guess the XR274R is too big unless I change to stronger springs.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
You always have to match cam with springs, most big solid rollers are going to use double springs, There is always a max lift on the heads and also a max diameter for springs. Now these can usally be changed by a machine shop to bigger but check with World as to what that max is.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,022
Likes: 6
From: CT
I brought the heads from Jegs last year so I just checked their catalog. It says the follows:
1.250" single springs, 100#@ seat, .560" max lift.
is that .560 the max lift of the springs or of the actual heads themselves?
1.250" single springs, 100#@ seat, .560" max lift.
is that .560 the max lift of the springs or of the actual heads themselves?
