How HOT is too HOTTTTT ; 428 CJ cam up grade

Make your Cougar run faster, handle better, and jump higher... okay maybe not jump higher. If you feel the need for speed, this is the place.
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bob hess
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How HOT is too HOTTTTT ; 428 CJ cam up grade

#1

Post by bob hess » 15 Sep 2017, 17:01

Any one know how hot a cam Ford ran in the record wining "Cobra Jet" mustangs . ( ie : rice-Holman Ford Car ) ?

Better put : At what point ( lift / duration / over lap etc. ), number wise, should one say ... it's just not street able ?
Too hot a given cam will limit one's " over all " enjoyment ( as in being stuck in traffic trying to get to the car show ) of the car. But lets face it ... we all love the sound of a "race" cam . But lets drive our cars ladies and gentleman !!!!! And NOT make the excuse that "I have to trailer it, .... it's to much to drive in traffic ".

Soooo any one know of the ( numbers ) point of no return ?

Working on a 68" ( org.390 car ) cougar. Now building a 428 CJ ,ram air . Most likely will be using Edelbrock "power Package" : Alum. intake / heads ( just not too sure about the cam that comes in the "Package") , headers, 3 1/2 in. pipes .

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1969XR7Vert
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#2

Post by 1969XR7Vert » 15 Sep 2017, 17:36

Have you checked out Comp Cams Thump'r line of cams?
Isabel, the realization of a seven year long dream:



Canted--Texan on the351cforum: "One of my most impressive attributes is that.......a lot of people don't like me.....or the horse I rode in on"

BAC
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#3

Post by BAC » 15 Sep 2017, 17:43

I have a Lunati 40510 in my 428 powered Mustang and it is as 'hot' as I would be comfortable driving on the street. Key numbers are:

Advertised Duration (Int/Exh): 300/310
Duration @ .050 (Int/Exh): 237/247
Gross Valve Lift (Int/Exh): .559/.572
LSA/ICL: 110/106
Valve Lash (Int/Exh): .022/.024
Cheers,
Brian

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R.B.Phillips
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#4

Post by R.B.Phillips » 16 Sep 2017, 07:48

As a guide, I'd use Ford's offering for a step-up hydraulic cam from 1969, the old over the counter "X" cam. The Super Stock Cobra Jets no doubt used proprietary cams from commercial cam grinders, but the C8AX cam was what Ford told weekend Stock (not Super Stock) racers to use. See page 8 at this link for its lift/duration at .100. Ford's Super Stock cam (or what they sold to you, anyway) is described on page 14, same link, and it was (surprise) solid lifter.)

http://www.mustangtek.com/Library2/HiPerfParts.html

bob hess
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#5

Post by bob hess » 08 Oct 2017, 13:45

Many , many thanks guys. This was exactly the info I needed to make my decision to use the "packaged" Edelbrock cam or not.

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9F91H581221
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#6

Post by 9F91H581221 » 08 Oct 2017, 15:33

235 degrees at .050 is probably about as far I'd want to go for the street. Currently, I run a cam that has 233 @.050 with a 113 lobe separation in a 460 in my 70 Cougar. It has a C-6 with a stock convertor and a 2.75 gear. More gear and higher stall would make it better at the track, but also make is less drivable. More cubes and the wider lobe separation help with drivability.
Is your car automatic or manual trans?

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1969XR7Vert
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#7

Post by 1969XR7Vert » 08 Oct 2017, 15:46

9F91H581221 wrote:
08 Oct 2017, 15:33
235 degrees at .050 is probably about as far I'd want to go for the street. Currently, I run a cam that has 233 @.050 with a 113 lobe separation in a 460 in my 70 Cougar. It has a C-6 with a stock convertor and a 2.75 gear. More gear and higher stall would make it better at the track, but also make is less drivable. More cubes and the wider lobe separation help with drivability.
Is your car automatic or manual trans?
I run 234/238 duration @.050" with 110 lobe separation, .622/.626 lift, hydraulic roller in my 408C. It too is about as much as one would want to run on the street. I use an auxiliary vacuum reservoir to help out the power brake booster, works pretty well.

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Isabel, the realization of a seven year long dream:



Canted--Texan on the351cforum: "One of my most impressive attributes is that.......a lot of people don't like me.....or the horse I rode in on"

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leonbray
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Re: How HOT is too HOTTTTT ; 428 CJ cam up grade

#8

Post by leonbray » 08 Oct 2017, 16:57

Contact Royce Peterson - has has played with a number of different cam grinds in his GTE's and GTs
Designed to be driven

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