Need cam opinions please

65fastbackresto

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Apr 13, 2007

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Sep 18, 2007

#1

• Sep 18, 2007

• #1

Knowing nothing about cams, I let my engine builder select one for me. I told him I wanted it to lope at idle, and yes I have a stall convertor. Can any of yall tell with these numbers what I can expect from this? I have 10 to 1 compresion, 1.6 roller rockers, and milodon pushrods with anti pump lifters. If u need any other info just ask.

Cam Specs

Dur at .050
Int 214
Ex 224

Advertised duration
Int 280
Ex 290

Lift Int 472
Ex 496

LSA Int 107
Ex 117

Power Range 2000 rpm to 4500 rpm.

Firing order 13726548.

 

blown65

Founding Member

Jul 7, 1999

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Queen Creek Arizona

Sep 18, 2007

#2

• Sep 18, 2007

• #2

Stock heads?

 

65fastbackresto

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Apr 13, 2007

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Sep 18, 2007

#3

• Sep 18, 2007

• #3

Edelbrock Performers

1.90 intake, 1.60 exh. Performer intake, Patriot Try-Y headers, MSD Dist and 6AL Ig box. Edelbrock 600 cfm carb.

 

rbohm

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Apr 12, 2002

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tucson,az

Sep 18, 2007

#4

• Sep 18, 2007

• #4

that is a decent cam for street use. i would recommend using 3.25 to 3.55 gears and a 2500-2800 stall speed torque converter for best performance. i would also suggest using an AOD to maintain decent highway manners as ell.

 

SoCalCruising

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Sep 18, 2007

#5

• Sep 18, 2007

• #5

What size motor? 302/331/347 ... I don't remember.
Flat tappet cam, right?

 

65fastbackresto

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Apr 13, 2007

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Sep 18, 2007

#6

• Sep 18, 2007

• #6

yea 302 bored 30 over

Hypertetic pistons and flat tappet cam.

I`m kinda wondering how much hp I`ll have approx and if it`ll lope at idle. I been working on this thing for months and its maybe a week tops till starts up.

 

SoCalCruising

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Sep 18, 2007

#7

• Sep 18, 2007

• #7

You'll have a 306ci motor. That cam will lope some, but it won't be bad. I would think that you will be in the 325-350hp range. Should be fun.

 

65fastbackresto

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Apr 13, 2007

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Sep 18, 2007

#8

• Sep 18, 2007

• #8

Heck yea

If its 325 to 350 I`ll be in heaven. I wanted it to scare me a little, it sounds like it might....

 

Cobain03

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Aug 27, 2003

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Lexington, Ky

Sep 18, 2007

#9

• Sep 18, 2007

• #9

thats one step above mine and i can notice a lope, although im ideling at 600.

 

6

66ccode

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Sep 10, 2007

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Sep 18, 2007

#10

• Sep 18, 2007

• #10

SoCalCruising said:

You'll have a 306ci motor. That cam will lope some, but it won't be bad. I would think that you will be in the 325-350hp range. Should be fun.

Click to expand...

I don't think you will be quite that high without aftermarket heads. Also your Performer intake is barley above a stock 4bbl. Im guessing you will be in the high 200s with your combo.

 

D

D.Hearne

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south louisiana

Sep 18, 2007

#11

• Sep 18, 2007

• #11

If you really wanted a lopey cam, you got one that's too small. That's an RV style grind. It will be slightly choppier than a stock cam, but it won't have the lope you probably wanted. Get something with a 108-110 LSA (your machinist's pick is a 112) and a .500-525 lift and a 230-240 duration and you'll have a killer sounding cam. That cam WILL be a torquey one though and give you tire melting performance from off idle. But it'll give out at 4000-5000 rpms.

 

SoCalCruising

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SoCal

Sep 19, 2007

#12

• Sep 19, 2007

• #12

I believe he is running Edelbrock Performer or Performer RPM heads. That's why I put the hp est. above 325hp. There is also a lot of split in the cam duration, which usually helps make hp at a slightly higher RPM, also helping peak numbers (if not overdone and killing backpressure).

 

jikelly

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Jul 9, 2003

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Lubbock Tx

Sep 19, 2007

#13

• Sep 19, 2007

• #13

oops double post.

 

jikelly

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Lubbock Tx

Sep 19, 2007

#14

• Sep 19, 2007

• #14

I love this article I found in Popular Hotrodding about choosing and understanding camshafts.

http://www.popularhotrodding.com/tech/0607phr_camshaft_basics/index.html

 

65fastbackresto

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Sep 19, 2007

#15

• Sep 19, 2007

• #15

I read that article it was good

If I got it right, ideal for my motor with the performer heads is a 109 to 111 LSA, and 286 duration, I didnt really understand the 286, but thats where the math landed.

 

SoCalCruising

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SoCal

Sep 19, 2007

#16

• Sep 19, 2007

• #16

Yeah, but the optimal LSA for peak power does not produce the flattest power curve. They tend to be more peaky. Fine for a race motor with a limited RPM band, but street cars benefit from flat power curves. I think thats why many engine builders use a wider LSA than what would produce max. peak power. Customers are happier with performance across a wide RPM range on the street. BTW, Vizard provided me with most of what I know about cams (from his writings). The custom grind in my 331 has an LSA of 111 degrees. Believe me, it makes buckets of power over a wide range. 112 on a 306 is fine.