Re: 430hp 440
[Re: B1MAXX]
#3229755
04/28/24 03:33 PM
04/28/24 03:33 PM
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Joined: Jan 2003
Posts: 31,082 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,082
Oregon
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Come on guys a 440 with a 509 back in the day were everywhere running brackets at 11.00 somethings with stock heads, a ported set of heads and you were in the 10's, some around here were in the 9's. Have we really forgotten how to get things to go without spending 3 grand? OP hasn't spelled out what he is trying to do. A 509 cam in a low compression 440 might run okay between 3000 and 5000 rpm, but it will be a pain on the street with daily driver gears. Rough idle, smell bad, bad fuel economy, etc. OP didn't say he had a race car or a tow truck or a daily driver. The Weiand dual plane and 750 vac secondary carb are clues that he isn't going racing.
Last edited by AndyF; 04/28/24 03:34 PM.
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Re: 430hp 440
[Re: AndyF]
#3229807
04/28/24 07:24 PM
04/28/24 07:24 PM
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Joined: Jan 2003
Posts: 657 Berlin NJ
scottk
mopar
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mopar
Joined: Jan 2003
Posts: 657
Berlin NJ
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[quote=B1MAXX]Come on guys a 440 with a 509 back in the day were everywhere running brackets at 11.00 somethings with stock heads, a ported set of heads and you were in the 10's, some around here were in the 9's. Have we really forgotten how to get things to go without spending 3 grand? . Rough idle, smell bad, bad fuel economy, etc. Ah yes..................
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Re: 430hp 440
[Re: AndyF]
#3229863
04/28/24 11:57 PM
04/28/24 11:57 PM
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Joined: Jan 2003
Posts: 4,760 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,760
Moved to N.E. Tennessee
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Come on guys a 440 with a 509 back in the day were everywhere running brackets at 11.00 somethings with stock heads, a ported set of heads and you were in the 10's, some around here were in the 9's. Have we really forgotten how to get things to go without spending 3 grand? OP hasn't spelled out what he is trying to do. A 509 cam in a low compression 440 might run okay between 3000 and 5000 rpm, but it will be a pain on the street with daily driver gears. Rough idle, smell bad, bad fuel economy, etc. OP didn't say he had a race car or a tow truck or a daily driver. The Weiand dual plane and 750 vac secondary carb are clues that he isn't going racing. The .509 was never intended for a car with 3.23 gears, 12" converter. Iron manifolds, no compression. It would be a dog in that combination. Don't do it. But with 4.10 gears, 10" converter, headers, and true 10:1 compression it actually runs pretty well. As said by B1MAXX, with decent tires high 11's are easy, 10's are possible if you throw some more money at it. 100's of cars proved this in the 1970's. Are there better cams now? Certainly, almost everything else has been improved since then as well. Edit: I will add here that advancing the cam at least 4° and recurving the distributor to have about 18-20° at idle and 36 total will also help clean up the idle and exhaust stink.
Last edited by GomangoCuda; 04/29/24 10:07 AM.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: 430hp 440
[Re: AndyF]
#3229888
04/29/24 07:03 AM
04/29/24 07:03 AM
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Joined: Feb 2005
Posts: 4,321 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,321
Prospect, PA
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But it only made 390 hp with stock heads. Once IQ52 ported the heads it picked up a bunch more. Not sure if IQ52 is alive anymore, haven't seen him post in a number of years but I do know that he stopped porting cast iron heads a long time ago. Too much work is what he told me. That was at least 10 years ago. Exactly. Everyone gets excited about the performance of this low compression 440 in this post. I see it as an acknowledgement that low compression kills a good motor. What a crappy street motor IMO. And, that was fresh, not inexpensive motor. To the OP, if you’re out of budget, put it together and enjoy it.
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Re: 430hp 440
[Re: B1MAXX]
#3229941
04/29/24 11:55 AM
04/29/24 11:55 AM
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Joined: Aug 2006
Posts: 2,537 God's Country Maryland
GODSCOUNTRY340
master
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master
Joined: Aug 2006
Posts: 2,537
God's Country Maryland
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Use the 516 heads but first, remove the valves and remove the ridge just below the valve seat, that is the main restriction on these Mopar heads. Mother Mopar put 2.08 intake valves in them but the opening below the seat is only 1 /3/4", grind it off with a carbide burr. If you really want to wake those 516 heads up install 1.74" exhaust valves, stock is only 1.60".
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: 430hp 440
[Re: GODSCOUNTRY340]
#3230002
04/29/24 03:17 PM
04/29/24 03:17 PM
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Joined: Aug 2003
Posts: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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The first stock stroke pump gas 440 motor I built that I had dyno tested in SO CA made 430 HP at or close to 5200 RPM, it had a set of forged Speed Pro, TRW, six pack .030 over 4 valve releif piston with a set of mifdly ported stock valve size 906 heads and a cast iron six pack set up off of 1970 440 six pack motor with stock jetting The 2nd motor I dyno built and dyno tested was for his younger Brother, a 400 block with a stock stroke 440 crank in it with a set of blueprinted LY rods, cheap build it was it had a set of mildly ported 906 heads with bigger valves and an Eddy B motor Performer RPM intake and a Holley 750 Vacuum secondary List # 3310, not sure which dash number it was, CRS That motor made right around 470 HP at or close to 6400 RPM, sorry for not remembering the torque values and RPMs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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