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Cam? On 385 sbc stroker
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
05:10 PM
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My buddy has this new cam he is willing to give to me it the com cams ex274h-10 I have a 385 sbc victor jr intake 200cc pro action RHS heads 64cc cumbustion chambers 10.5.1 compression th400 4.11gears I want to know if this can is a good cam that will make 450+HP
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
05:13 PM
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And I have done a light port job to the heads gasket mached intake and heads also and has a two in carb spacer with Holley 650dp
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
05:34 PM
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Wesley welcome to CHP:
XE274-10 .230/.236 degrees duration @ .050
.490/.490 lift with stock 1.5 rocker arm ratio
3 things you need to do.....
1.You need a set of matched valve springs for that cam! Thats a must 
2.A good CLOYES double roller timing chain...
3.Comp Cam suggests a 2200RPM torque conv. With your rear gears us a 2800 to 3000RPM stall torque conv. If you don't use a higher then stock torque conv. Your engine will not idle when you put it in gear....  
What are you using your engine in?
All your pieces will be okay. Except you may run out of carb. You may need a 750CFM Holley
Bob
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
05:40 PM
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I don't bielive it is the 4-7 swap but those don't really make a purpose if your not running high rpm and would I beable to run 1.6 rockers to get more lift And I am going to get another carb for it I'm just going to use the 650 on the street and throw a bigger carb when I go to the truck pulls and pismo
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
06:00 PM
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Wesley
I dug into the P/N further. IT'S NOT A 4-7 SWAP... It would have been nice though The number you gave came up with 3 different cams. Good old Comp Cam. It also showed a big block cam with that number. Stay tuned I have some more things for you...
Bob
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
06:18 PM
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What is the P/N for your heads?
Are they Aluminum or cast Iron?
I have a listing of 5 different heads and all bare castings...
This will help you get a set of valve springs. If the V/S pocket is big.
They have bare cast iron straight plug 64cc 23* for 2.02 and 1.6
Then 2 cast iron 72cc and 50cc angle plug iron casting all bare castings
Then 1 Aluminum 64cc straight plug head, and 1 Aluminum 64cc angle plug head all bare castings.
Let me know.
Bob
Bob
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
06:44 PM
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Wesley
Do you have the spec card for the cam. That 4-7 swap popped up again.
The P/N you gave us EX274H-10 is incorrect. It's 12-660-47 Grind Number XE274H-10
You need to get those numbers correct!
There's (3) cams with that number. It's the preface number thats throwing the curve
If your going to run the 650 on the street, keep an eye on your plug colors.
I can't help you if you don't help me.
Bob
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skyeking
Addict
| Posts: 2583
| Joined: 08/09
Posted: 10/10/12
06:47 PM
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Hi People,
To get the 450hp you want then a B/G Demon would be a choice..Skyeking
skyeking
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
06:49 PM
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It is the aluminum casting with straight plugs 200cc intake 64cc I am going to run it in a 84 Chevy 4x4 2500 and am going to rebuild the tranny and put a new converter in it
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
06:51 PM
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I don't have the number in front of me right now but I will be home in a bit and put it up here
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
07:23 PM
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Okay now we can get somewhere. Take your time a 1/2 day won't hurt either of us...LOL...
Yeah are the heads bare?
Later, and like I said take your time...
Bob
Noel: How's the Lemonade in Australia?
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/10/12
07:50 PM
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12-246-3 and the heads are bare castings I still have to get all the springs valves rockers and push rods
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/10/12
11:27 PM
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Wesley are there any other numbers on those heads?
Here's what I show for Aluminum Heads
Part Number RHS12054
Description"Pro-Action" Head Bare
Intake Runner 200cc
Combustion chamber 64cc
Plug Angle Straight
Valve Angle 23*
Intake Valve 2.020
Exhaust 1.600
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Wesley
New User
| Posts: 9
| Joined: 10/12
Posted: 10/11/12
04:15 AM
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Ya that would be number to the heads I baught them off my buddy for 500 new he ended up going with afr heads are these heads that I have any good
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pepsi1
Guru
| Posts: 1661
| Joined: 09/11
Posted: 10/12/12
11:35 AM
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Wesley
"Not that it matters OKay". I can't find that part number.I have RHS catalog. I went on their WEB-SITE. Ask your buddy how old those heads are? The number that closely comes nar that is #12054..Just some very friendly advice get those heads pressure checked, and have the valve guides checked. You may need to install a bigger valve in both the intake and exhaust.
They are good heads, for Bracket racing according to their literature. Good street heads for a muscle car, and a Pro Street Car. Street Hot Rod. They are machined for a 1.550 Valve spring.
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