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Stock 340 Replacement Cam - I'm beating my head.......
#935351
02/23/11 06:33 AM
02/23/11 06:33 AM
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Joined: Sep 2010
Posts: 33
Top 'O' Texas
hotrod340
OP
member
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OP
member
Joined: Sep 2010
Posts: 33
Top 'O' Texas
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I have beat my head on what to decide....can someone suggest the best replacement camshaft using the stock rocker arms and push rods for a total stock 1969 340 with 10:5.1 compression, stock exhaust manifolds, auto, and 3.23 gears in a 69 Dart? I would like the performance that it had when I had it close to new...strictly street driven, no racing. I have read so much stuff on the subject that I have a headache from hell...and I still don't know what to use.  Thanks a lot! Kenny
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Re: Stock 340 Replacement Cam - I'm beating my head.......
[Re: quickd100]
#935353
02/23/11 08:49 AM
02/23/11 08:49 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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are you looking for high vacuum for power brakes and a smooth stock idle? do you really have 10.5 compression, or is that just what the pistons said?
if you have a true 10.5:1 compression on iron heads, I'd go a few steps over stock for a nice performance gain, you'd gain a nice lope at idle, and a lost more performance over stock. just don't go too many steps over stock, or you'd end up with no bottom end torque and a motor that needs to spin to 7,000 rpm to make peak power, which won't be good with 3.23 gears.
still...I'd consider a few steps bigger than stock if you have a true 10.5 compression
**Photobucket sucks**
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Re: Stock 340 Replacement Cam - I'm beating my head.......
[Re: zrxkawboy]
#935355
02/23/11 10:58 AM
02/23/11 10:58 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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comp XE268 or lunati voodoo 60403
use comp #901 springs or hughes #1110 springs
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Stock 340 Replacement Cam - I'm beating my head.......
[Re: hotrod340]
#935358
02/28/11 12:49 AM
02/28/11 12:49 AM
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Joined: Feb 2003
Posts: 3,691
MO
cdp
master
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master
Joined: Feb 2003
Posts: 3,691
MO
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Bob Karakachian has the correct 1 year only 4spd cam available. As well as other profiles. Before you make a purchase, its worth a an email. I picked up one for my A12-440-6v. Chris mr6pk@hotmail.com
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Re: Stock 340 Replacement Cam - I'm beating my head.......
[Re: HYPER8oSoNic]
#935359
02/28/11 02:38 AM
02/28/11 02:38 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
Quote:
Quote:
I'd try the MP P4452761.
+1...exactly what I was going to suggest!
Ditto here!! Buy the complete camshaft kit, BUT check pushrod lengths and the stock rocker arm setup (condition of wear) for optimum performance from the valvetrain. 
That cam should work nicely with your combination.
Should be OK with the stock springs/rockers.
The more aggressive 268 cams like the comp, voodo or hughes will want stiffer valve spring pressures that are hard on stock stamped rockers.
With any flat tappet cam, make sure to break it in correctly and use a engine break-in additive (Check Hughes or Comp?) and high ZDDP content oil.
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