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02-19-2009, 02:47 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Claremore,
OK
Cobra Make, Engine: RUCC, 289 c.i. with a T-5 "Living the Cobra Experience"
Posts: 994
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Not Ranked
302 Stroker build
I might be buying a 1970 302 from a guy at work, never been rebuilt. I have thoughts of stroking it to a 331 or a 347. He also has a extra set of 302 heads with 351W valves installed.
What's the advantage of the 351 valves in these heads, make it breathe better? Also wondering if they'd be a good match for either the 331 or 347? He supposed to be getting me the head casting numbers tonight.
Not sure what cam I would use yet, any suggestions? I'm looking for about 350 HP, driven on the street only, no racing.
Any suggestions would be appreciated. 
__________________
Juggernaut
"Living the Cobra Experience"
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02-19-2009, 02:57 PM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: DeLand, FL,
fl
Cobra Make, Engine: ERA FIA #2117; 331 stroker; TKO600
Posts: 588
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Not Ranked
You don't want to build a stroker (either a 331 or 347) and then kill it's performance potential by putting poor flowing heads on it - that's the whole reason for stroking the motor. There are SO many good heads out there for that application -AFR, Trick Flow, Brodix. A set of AFR 165's are perfect for a 331 - that's what I have on my Keith Craft 331. Plenty of power, great on the street, really nice sound.
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02-19-2009, 03:12 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Claremore,
OK
Cobra Make, Engine: RUCC, 289 c.i. with a T-5 "Living the Cobra Experience"
Posts: 994
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Not Ranked
Quote:
Originally Posted by Rickd
You don't want to build a stroker (either a 331 or 347) and then kill it's performance potential by putting poor flowing heads on it - that's the whole reason for stroking the motor. There are SO many good heads out there for that application -AFR, Trick Flow, Brodix. A set of AFR 165's are perfect for a 331 - that's what I have on my Keith Craft 331. Plenty of power, great on the street, really nice sound.
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Good advice, thanks.
__________________
Juggernaut
"Living the Cobra Experience"
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02-19-2009, 03:20 PM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Carrollton,
TX
Cobra Make, Engine: JBL now SOLD
Posts: 1,735
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Not Ranked
No reason not to go with the 347 vs. 331. More cubes, more power.
__________________
6th generation Texan....
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02-19-2009, 03:55 PM
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CC Member
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Join Date: Apr 2004
Location: Scotts Valley,
CA
Cobra Make, Engine: ERA 289 FIA #2108
Posts: 1,882
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Not Ranked
Check your build cost before you buy anything. Machine work is the budget killer. Local builders here (Santa Cruz) were more expensive that buying a pre-built stroker from Keith Craft or Coast High Performance.
Just a thought.
DD
__________________
Dangerous Doug
"You're kidding, right?"
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02-19-2009, 05:01 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Claremore,
OK
Cobra Make, Engine: RUCC, 289 c.i. with a T-5 "Living the Cobra Experience"
Posts: 994
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Not Ranked
Quote:
Originally Posted by Dangerous Doug
Check your build cost before you buy anything. Machine work is the budget killer. Local builders here (Santa Cruz) were more expensive that buying a pre-built stroker from Keith Craft or Coast High Performance.
Just a thought.
DD
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Thats exactly what I was thinking driving home from work. I think I'll just sit back and run some numbers before I do anything.
Time to go check out the Keith Craft website.
Thanks!
__________________
Juggernaut
"Living the Cobra Experience"
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02-19-2009, 05:06 PM
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Club Cobra Member
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Join Date: Nov 1999
Location: Salem,,
NJ
Cobra Make, Engine: ERA 289 FIA #2100 Rio Red Wimbledon White Stripes 302 stroked to 331 Webers Richmond Road Race 5 speed
Posts: 782
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Not Ranked
I did a 68 302 block stroked to 331 with AFR 185 heads. 3.25 Scat forged crank, JE pistons with a 1.250 piston height that were for a 351, and Crower Sportsman rods at 5.315". No wrist pin in the oil ring!
__________________
 Snakebit
Last edited by Snakebit; 02-19-2009 at 05:10 PM..
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02-19-2009, 06:04 PM
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CC Member
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Join Date: Apr 2004
Location: Scotts Valley,
CA
Cobra Make, Engine: ERA 289 FIA #2108
Posts: 1,882
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Not Ranked
Juggernaut: I have a spreadsheet that I made apple to apple comparisons on 302 based engines for my FIA. PM me with your email if you want me to send you a copy.
DD
__________________
Dangerous Doug
"You're kidding, right?"
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02-19-2009, 08:26 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Claremore,
OK
Cobra Make, Engine: RUCC, 289 c.i. with a T-5 "Living the Cobra Experience"
Posts: 994
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Not Ranked
Quote:
Originally Posted by Dangerous Doug
Juggernaut: I have a spreadsheet that I made apple to apple comparisons on 302 based engines for my FIA. PM me with your email if you want me to send you a copy.
DD
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DD, sent you a pm.
__________________
Juggernaut
"Living the Cobra Experience"
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