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Author Topic:   Cam install
BAD67FUN
Journeyman

Posts: 55
From:
Registered: Feb 2002

posted 05-02-2002 02:52 PM     Click Here to See the Profile for BAD67FUN     Edit/Delete Message   Reply w/Quote
Okay, it's obvious I can't afford a whole new engine at the moment. But I'd really like a little more pop outta my 289. I don't want to put too much money into it. It currently has Hooker Comp headers, an old Holley Street Dominator manifold and a Holley carb I honestly don't know what CFM it is. I'm first going to put a set of 3.73's with an Auburn out back behind my C4. It appears that the Comp Cam 270S and H are the popular cam choices, but which? And what else should I minimally do when installing the cam? Lifters, right? Do I have to do rockers? Don't want to spend any more than needed. Just want a nice lopey fun ride until I get money for more cubes. Please help...

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SteveLaRiviere
Administrator

Posts: 32655
From: Saco, Maine
Registered: May 99

posted 05-02-2002 06:07 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
New lifters and matched valve springs will be needed. But you can use your current rocker arms with the 270H cam. {a hydraulic cam won't need the adjustability the mechanical cam will}

With an older engine, you'd be better off with a milder cam, like the 268H.

Also, if you look up the list # on your choke horn, we can tell you what your carb is.


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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

The secret of success is sincerity. Once you can fake that, you got it made.

[This message has been edited by SteveLaRiviere (edited 05-02-2002).]

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ice'68
Gearhead

Posts: 127
From: Fresno, CA
Registered: Apr 2002

posted 05-03-2002 02:35 AM     Click Here to See the Profile for ice'68   Click Here to Email ice'68     Edit/Delete Message   Reply w/Quote
I have almost the same exact setup, only I plan to swap in an Edlebrock Performer RPM Intake and Cam Kit. I've recently had a valve job done on my heads, would I need to replace the valve springs on my heads if I installed that size cam? (224 int./234 exh. duartion at .050"). And yes, my 289 is healthy.

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Stang28965
Gearhead

Posts: 383
From: Webster New York USA
Registered: Mar 2001

posted 05-03-2002 06:38 AM     Click Here to See the Profile for Stang28965   Click Here to Email Stang28965     Edit/Delete Message   Reply w/Quote
How many miles do you have on your heads? You need to make sure the springs you have now can handle .501" of lift w/o binding.

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-Jeff
1965 Mustang with a 289 bored .030" over. The 289 has a Holley 600cfm 4bbl, 302 heads, tri-y headers, Elgin cam .448int. 204deg, .472 exh 214deg. Eagle connecting rods, As for the drivetrain, I have a 4speed with 3.55 gears in the back. http://members.cardomain.com/stang65

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65351w
Journeyman

Posts: 4
From: Bellevue Ne US
Registered: Feb 2002

posted 05-03-2002 07:15 AM     Click Here to See the Profile for 65351w   Click Here to Email 65351w     Edit/Delete Message   Reply w/Quote
Any one running an Edlebrock Performer RPM cam, and how is your Idle with this cam? I have heard that it has a mild to rough idle to it.

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BAD67FUN
Journeyman

Posts: 55
From:
Registered: Feb 2002

posted 05-03-2002 08:27 AM     Click Here to See the Profile for BAD67FUN     Edit/Delete Message   Reply w/Quote
Great, thanks Steve. I'll see if I can get that number this weekend. It'd be nice to know what CFM I have. As for the 268H, my engine seems to be pretty stout. As stout as I can expect with 120K miles/35 years old. Does the 268H give a nice lope to it? I kind of figured if the 270H hurts my engine bad, I'll have an excuse to change the whole engine. You'll know what I mean if you're married.

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SteveLaRiviere
Administrator

Posts: 32655
From: Saco, Maine
Registered: May 99

posted 05-03-2002 07:45 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
In addition to making sure the springs will clear the lift without binding, you also need to know if they have the spring pressure the cam maker requires.

The 268H does have a nice lope, and the lesser valve lift will be easier on your old valve stems and guides.

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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

The secret of success is sincerity. Once you can fake that, you got it made.

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ice'68
Gearhead

Posts: 127
From: Fresno, CA
Registered: Apr 2002

posted 05-03-2002 10:58 PM     Click Here to See the Profile for ice'68   Click Here to Email ice'68     Edit/Delete Message   Reply w/Quote
My heads have about 500 miles on them since the valve job. And my engine has about 75,000 on it. Although it is 34 years old. I think I'll go ahead and replace the springs anyways. Also, could I use a 268H cam or 270H cam with my current springs? Thnx guys.

[This message has been edited by ice'68 (edited 05-03-2002).]

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SteveLaRiviere
Administrator

Posts: 32655
From: Saco, Maine
Registered: May 99

posted 05-04-2002 04:32 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by ice'68:
Also, could I use a 268H cam or 270H cam with my current springs?

Exactly what springs do you have?

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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

The secret of success is sincerity. Once you can fake that, you got it made.

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ice'68
Gearhead

Posts: 127
From: Fresno, CA
Registered: Apr 2002

posted 05-04-2002 09:05 PM     Click Here to See the Profile for ice'68   Click Here to Email ice'68     Edit/Delete Message   Reply w/Quote
They're the stock springs... which means they'll likely have to be replaced =(. Oh well. Quick question about the 268H. Does it have a noticeable idle? I'd like something a little more noticeable then what I have now (stock). Other than that, I think the 268H would do just fine. Thnx Steve.

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johnmustang
Gearhead

Posts: 4088
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001

posted 05-05-2002 01:08 AM     Click Here to See the Profile for johnmustang   Click Here to Email johnmustang     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by ice'68:
Quick question about the 268H. Does it have a noticeable idle? I'd like something a little more noticeable then what I have now (stock). Other than that, I think the 268H would do just fine. Thnx Steve.

I also would like to know how this cam will idle.

JOHN

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65 2+2 FASTBACK
68 COUPE
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
Member:Vancouver Island Mustang Association
M&M #1710
MyPhotoPage
MY TRUCK

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V8 Thumper
Gearhead

Posts: 3267
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 05-05-2002 03:28 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
It will have some idle chop , nothing unbearable

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ice'68
Gearhead

Posts: 127
From: Fresno, CA
Registered: Apr 2002

posted 05-05-2002 06:01 PM     Click Here to See the Profile for ice'68   Click Here to Email ice'68     Edit/Delete Message   Reply w/Quote
Well, I just ordered a Performer RPM Intake from Summit, and I've also chosen to go with the Comp Cams 268H Cam, Lifters and Valve Springs.

Next on my "wish list" is an Edelbrock Carb. and TCI Torque converter.

[This message has been edited by ice'68 (edited 05-05-2002).]

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SteveLaRiviere
Administrator

Posts: 32655
From: Saco, Maine
Registered: May 99

posted 05-05-2002 08:37 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I used the 268H in a old 351C 2V, and new 351C 4V in my Sprint, and a new 351C 2V in a F-150. It worked well in all configurations. The idle has a mild chop, but it's tame enough to provide decent vacuum.

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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

"Doubt is not a pleasant condition, but certainty is absurd."
- Voltaire

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