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Feb 25, 2014 | 05:32 PM

#41

C3 Stroker

Safety Car

Joined: Oct 2004

Posts: 3,926

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From: Youngstown Ohio

Quote:

Originally Posted by 71frameoff

Called Comp Cams and they suggested for a hyd roller to use - the extreme energyXR288 HR. dur 236/242, lift 520 intake and 540 exhaust. 110 lobe separation with a small base. Pn# 08-433-8. Sound about right?? then what carb? 750~850?

.....That seems like too small a cam.....500hp 383s with AFR 195s use more cam than that.

Take full advantage of your 427 cubes; also think 950 QuickFuel or Holley Ultra carb.

Feb 25, 2014 | 05:33 PM

#42

StraubTech

Drifting

Joined: Jul 2013

Posts: 1,299

Likes: 93

From: Tri-Cities TN

[QUOTE=71frameoff;1586261610]

Quote:

Originally Posted by StraubTech

This is based on a 4" stroke engine with a set of 210s?[/QUOT

Yes, or would it be better with a set of 220s

YOu have to base the cam off the heads. Cant select the cam until you decide on heads.

Feb 25, 2014 | 05:42 PM

#43

63mako

Race Director

Joined: May 2005

Posts: 10,674

Likes: 122

From: Millington Illinois

St. Jude Donor '08-'09

Quote:

Originally Posted by 71frameoff

That is the cam Im running in my 10.4 to 1 383, 195 eliminator competition ported heads with a wider LSA for nitrous. 527 HP @ 6200.

Feb 25, 2014 | 06:51 PM

#44

71frameoff

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Instructor

Joined: Feb 2014

Posts: 228

Likes: 2

[QUOTE=StraubTech;1586261673]

Quote:

Originally Posted by 71frameoff

YOu have to base the cam off the heads. Cant select the cam until you decide on heads.

from the general opinion here it looks like I should get the AFR 220s

Feb 25, 2014 | 10:04 PM

#45

garygnu

Burning Brakes

Joined: Sep 2012

Posts: 818

Likes: 0

From: coon rapids mn

get the cam last .then measure and order the push rods last .what hood will you be using ?take your time don't rush any decision .

Feb 25, 2014 | 10:33 PM

#46

71frameoff

Thread Starter

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Quote:

Originally Posted by garygnu

get the cam last .then measure and order the push rods last .what hood will you be using ?take your time don't rush any decision .

I will have to read up on how to measure for push rods. the hood, what ever I need to use, don't care.

Feb 26, 2014 | 10:49 AM

#47

71frameoff

Thread Starter

Instructor

Joined: Feb 2014

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does anyone know how to measure for push rods. looking at the catalogs didn't see different lengths??

Feb 26, 2014 | 11:44 AM

#48

bluedawg

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Joined: Jan 2009

Posts: 3,736

Likes: 56

From: anchorage ak

Quote:

Originally Posted by 71frameoff

does anyone know how to measure for push rods. looking at the catalogs didn't see different lengths??

There are some good videos on YouTube. Its not that difficult.

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Feb 26, 2014 | 12:23 PM

#49

resdoggie

Had a 1976 L-82, 4-sp

Joined: Mar 2011

Posts: 5,338

Likes: 1,213

From: Some days your the dog and some days your the hydrant.

Royal Canadian Navy

I bought a Howard's retro HRC and bought the pushrods they recommended for that cam. The length was spot on.

Feb 26, 2014 | 12:56 PM

#50

63mako

Race Director

Joined: May 2005

Posts: 10,674

Likes: 122

From: Millington Illinois

St. Jude Donor '08-'09

Quote:

Originally Posted by 71frameoff

does anyone know how to measure for push rods. looking at the catalogs didn't see different lengths??

Pushrod length is determined by your choice of cam base circle, lift, valve length, rocker choice, valve face to deck distance. Each custom build is different. You need to assemble your build and use a pushrod length checker to determine the correct length. Going with the pushrod in the "kit", recommendation of the cam manufacturer or what worked in someone else's build will not get you what you need for your specific build. Correct valvetrain geometry is crucial for durability.

Feb 26, 2014 | 02:04 PM

#51

StraubTech

Drifting

Joined: Jul 2013

Posts: 1,299

Likes: 93

From: Tri-Cities TN

A combination of parts makes for a good running engine. A bunch of parts makes for a bad running engine. Your goal is to build a combination that achieves your goals.

Feb 26, 2014 | 04:59 PM

#52

71frameoff

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Instructor

Joined: Feb 2014

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Really need some help with the cam. AFR 220 heads. need as much cam as I can use and still be streetable and able to cruise on the freeway (but still nasty).