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Camshaft selection......

 
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h250es
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Joined: 15 Apr 2011
Posts: 4
Location: Mt. Pleasant, Mi
239.42 points



PostPosted: Fri Apr 15, 2011 6:20 pm    Post subject: Camshaft selection...... Reply with quote

Hello!! I am fixing up my mud truck. I am rebuilding my 454 and trying to decide on the correct camshaft. I have a F250 chassis with 5.38 gears and and an automatic, I am putting a Ranger body on it to make it lighter. Approx. weight will be 5000 lbs.
I contacted comp cams they told me to use a 11-235-3, extreme 4x4 cam shaft. It seems a bit small. My target rpm is 5800 max. But do not want the engine to "nose" over too soon. I have a Edelbrock performer intake and headers, Sad part is I will be using the 1976 truck heads.

So I am looking for a second opinion.

Thanks,
Joe
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Big Dave
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Joined: 04 Dec 2005
Posts: 2547
Location: Tampa Florida
116113.74 points



PostPosted: Fri Apr 15, 2011 8:33 pm    Post subject: Reply with quote

Camshaft won't be your limiting factor your choice of heads will be. No cam lobe profile I know of will make a Peanut port 195cc runner perform as well as the earlier 230 cc 396 heads will. (A better choice is the Chevelle head 3964290 = 396/402/427/454 ,69-70 ,2.06/1.77 ,100cc Oval port, or the 3993820 402/454 head from 1971 with 2.06/1.75 valves 113cc open chamber Oval port. You can find these heads for about $250 a set, but plan on rebuilding them (and inquire about returning them if cracked). Install 2.25 Intake and a 1.88 exhaust valve with a nice five angle valve job then ask about which cam to use.

By the way what is wrong with the Ford 460 motor with a set of better heads on it.

Big Dave
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Skunkworkx
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Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Fri Apr 15, 2011 9:49 pm    Post subject: Reply with quote

VORTECPRO@GMAIL.COM (mark jones) is very good at porting GM heads and makes peanut port heads flow great.
I think he mainly likes the 731? heads...unsure.
Drop him a line or call him for some input...great guy making serious HP/TQ using GM heads...aftermarket heads and the numbers are wild Very Happy

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10sec.et
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Joined: 29 Mar 2006
Posts: 3227
Location: Houston,Texas
338691.72 points


1969 Oldsmobile Cutlass

PostPosted: Fri Apr 15, 2011 11:44 pm    Post subject: Reply with quote

Big Dave wrote:
By the way what is wrong with the Ford 460 motor with a set of better heads on it.

Big Dave


hell yeah!!! if you want a Chevy, get a Chevy......... just sayin


BTW, welcome to SMOKEmUP Cheers

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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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h250es
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Joined: 15 Apr 2011
Posts: 4
Location: Mt. Pleasant, Mi
239.42 points



PostPosted: Sat Apr 16, 2011 10:18 am    Post subject: Reply with quote

Thank u for the ideas. I realize the heads are my limiting factor, at this point. But must work at it one step at a time. But my search is on for better heads.

As for the 460, I need Horsepower and have a budget......... Currently has a 1975 455 buick in it w 1970 heads, 10:1 and a 268h cam, not quite enough.... Had a 1970 472 Cad in it, but not enough rpm, plenty of torque tho!!

Joe
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Skunkworkx
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Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Sat Apr 16, 2011 10:30 am    Post subject: Reply with quote

It's funny this came up about the 460 Smile

We (friends truck) had an 86 Ranger on a custom body lift on a 60's Bronco frame with 9" ? of suspension lift and a 460BBF no shortage of power IMO.
Was called Danger Ranger and we raced at New Egypt Speedway,Cecil County mud hop,Budd's Creek (MIR)....fun days.
Back before Beef-T-Blue went pro we were neck and neck every month Smile
ran it in 3 classes (mini truck, 36" tire class,and 44" tire class)
I stand at 6' tall and the headlights were eye to eye with me and the 36's on...with the 44's you were looking eye to eye with kids on school busses....fun times LOL

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h250es
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Joined: 15 Apr 2011
Posts: 4
Location: Mt. Pleasant, Mi
239.42 points



PostPosted: Tue May 03, 2011 6:18 pm    Post subject: Reply with quote

I located a set of 781 heads. Price was right, and a set of .260 dome pistons, so Open chambers are a must now.. Hopefully my combo will work out good!!

Thank you,
Joe
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af2
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Joined: 01 Sep 2003
Posts: 5399
Location: grassvalley, ca
66517.86 points


1933 Willys Coupe

PostPosted: Tue May 03, 2011 8:20 pm    Post subject: Reply with quote

Joe,
Get the heads done and have them flowed. Plug all the #'s(CI RPM FLOW #"S ETC) to any good cam company and they will inform you what you need.

Don't try and pick a cam then find out it is not the one.
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jeep_406
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Joined: 12 Sep 2002
Posts: 1637
Location: Tewksbury, Mass 01876
52267.92 points


1972 Chevrolet Nova

PostPosted: Tue May 03, 2011 10:11 pm    Post subject: Reply with quote

Welcome to SMOKEmUP.com
I'd follow Adam's advice & select a cam after you know what parts you'll be using.
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