Iron Headed 306 Build
Thread Starter
1st Gear Member
Joined: Dec 2006
Posts: 84
From: North Carolina
Iron Headed 306 Build
Alright, I have searched for hours on the net without any success, so I'm just going to ask on here and hope I can get an answer. I am in the process of building a 302 with a .030" overbore and ported/polished 351W heads with around a 10.5:1 compression ratio. A Comp hydraulic flat tappet camshaft with .534"/.534" lift and 244/244 duration at .050" lift.will be used. Do any of you have any experience or knowledge of what kind of power this engine will be capable of producing, given that all of the other necessary modifactions for an engine of this caliber are performed.
6th Gear Member
Joined: Apr 2007
Posts: 10,468
From: California
RE: Iron Headed 306 Build
That's gonna depend on heads and induction/exhaust. If all's good it should be able to easily put out 375-400hp though,maybe more. If the heads weren't done well it may not run well. It's hard to tell you when you have ported/polished heads, that doesn't really say anything about how they perform
2nd Gear Member
Joined: Jun 2006
Posts: 283
From:
RE: Iron Headed 306 Build
ORIGINAL: 67mustang302
If all's good it should be able to easily put out 375-400hp though,maybe more.
If all's good it should be able to easily put out 375-400hp though,maybe more.
it can happen but i dont see it as much. im thinking like 325 ish at the flywheel
5th Gear Member
Joined: Sep 2005
Posts: 2,505
From: Wasilla, Alaska
RE: Iron Headed 306 Build
That sound a little too generous in the horsepower department for that 306. I'd say in the low 300's, maybe a tad more. Need more details. Valve size, intake used, carb, headers, gears????
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6th Gear Member
Joined: Apr 2007
Posts: 10,468
From: California
RE: Iron Headed 306 Build
My 307 is putting out around 350 at the flywheel(calculated based on trap speed and vehicle weight)through a 570cfm carb at less than 6krpm with no type of cold air induction. That engine has a bigger cam, but it is gonna come down to the heads. If the heads were done very well it could easily put out over 400hp, if the headswere done likecrap, it may put out less than 300 and produce bumpkiss for torque. The heads can make or break an engine. But 10.5:1 static compression with a beefy cam can make a crapload of power with good heads and the induction to match
5th Gear Member
Joined: Jun 2006
Posts: 4,089
From:
RE: Iron Headed 306 Build
Mine estimates around 400hp with a smaller cam, but 2 points more compression. Based on a 120mph trap speed in a 3300 pound car. It actually estimates more...but use the more conservative number.
6th Gear Member
Joined: Jan 2007
Posts: 5,469
From: AR
RE: Iron Headed 306 Build
ORIGINAL: sixty5mustang289
Alright, I have searched for hours on the net without any success, so I'm just going to ask on here and hope I can get an answer. I am in the process of building a 302 with a .030" overbore and ported/polished 351W heads with around a 10.5:1 compression ratio. A Comp hydraulic flat tappet camshaft with .534"/.534" lift and 244/244 duration at .050" lift.will be used. Do any of you have any experience or knowledge of what kind of power this engine will be capable of producing, given that all of the other necessary modifactions for an engine of this caliber are performed.
Alright, I have searched for hours on the net without any success, so I'm just going to ask on here and hope I can get an answer. I am in the process of building a 302 with a .030" overbore and ported/polished 351W heads with around a 10.5:1 compression ratio. A Comp hydraulic flat tappet camshaft with .534"/.534" lift and 244/244 duration at .050" lift.will be used. Do any of you have any experience or knowledge of what kind of power this engine will be capable of producing, given that all of the other necessary modifactions for an engine of this caliber are performed.
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