5.0 update

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Old 11-03-2006, 12:23 AM
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5.0 update

So I have now got a 85 HO Non roller motor out of a 85 mustang Gt.
I have c9oe 351 heads to put on it, an Edelbrock Performer 289 Intake. The new ford hei equivalent dizzy
Hooker Long tube headers, Hushpower II Mufflers. C6, Dana Posi 3.73.
Do i stick with the stock cam? Being a daily driver bottom end seems more practical than top end.
Which carb? Right now i have a Carter 4 barrel.
This is going in my 66 short box stepside.
I would like it to scoot along but i have to consider fuel economy.
How will this do?
Thanks
 
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Old 11-03-2006, 08:58 AM
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No, don't stick with the stock cam. The CFI motor had to use a cam that would work with the CFI system, and that may not be as healthy as you would want on your carb'd combonation. Use a good flat tappet, from the aftermarket, to better fit your overall combonation.

Also, cc the heads.

My personal prefrence is Holley type carbs, with anular discharge venturis, but that's just a personal prefrence. The Carter AFB, AVS, or Thermoquad, are good.
 
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Old 11-03-2006, 09:26 PM
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Stupid question but define cc the heads?
Thanks


No, don't stick with the stock cam. The CFI motor had to use a cam that would work with the CFI system, and that may not be as healthy as you would want on your carb'd combonation. Use a good flat tappet, from the aftermarket, to better fit your overall combonation.

Also, cc the heads.

My personal prefrence is Holley type carbs, with anular discharge venturis, but that's just a personal prefrence. The Carter AFB, AVS, or Thermoquad, are good.
 

Last edited by TigerDan; 11-04-2006 at 10:56 AM.
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Old 11-04-2006, 11:02 AM
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CC'ing the heads is a process where you seal off the combustion chambers one at a time with a flat plate of (usually) plexiglass with a small hole in it, and using a burette you fill the chamber with fluid, (usually rubbing alcohol since it has a lower surface tension than water) noting exactly how much fluid it takes to fill each chamber. There can be small discrepancies as cast.

Then you do a slight bit of grinding in unobtrusive places around the chamber to equalize them, which in turn equalizes the compression in all 8 cylinders.
 
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Old 11-05-2006, 09:06 AM
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I was thinking more in the context of just making sure of what the chamber volume actually is, but going through the extra steps is highly reccomended.
 
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Old 11-05-2006, 10:10 AM
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Well, leave it to me to give the long answer...

I'd certainly want to know, but if going through the effort to find out I'd then be hard pressed to leave it alone and not equalize the chambers. I'm just sort of **** that way...
 
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Old 11-05-2006, 03:04 PM
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Thanks

I went to the performace shop today and they reccomended i put in a
Comp Cam # XE 262 H
The part # is 31-282-3
They matched the lifters and springs to this cam.
Being a daily driver they felt it was the biggest cam i could put in without having to use a stall converter.
Before I actually order it what do you guys think?
 

Last edited by 6T6Shorty; 11-05-2006 at 03:07 PM.
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Old 11-06-2006, 09:31 PM
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Oops Cam specs are

1300-5600 Rpm
262* Intake 270* Exhaust
Duration @ .050" Lift 218* Intake 224* Exhaust
Valve lift (1.6 Rockers) .493" Intake .500" Exhaust
Lobe seperation 110*
 
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Old 11-07-2006, 08:49 AM
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Looks like a good cam for a performance improved truck motor to me. It's got enough duration to make a difference, and not too much lift. It should'nt have too much overlap, and it should work fine with a stock converter.
 




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