'915 440 build How much HP possible?
#2638593
03/29/19 07:28 PM
03/29/19 07:28 PM
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Posts: 1,048 The Great White North
RAMM
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I was looking around the shop and noticed I have almost enough parts to screw a pretty nice 440 together.
There are some stipulations of course: Anything in bold is a must, no ifs ands or buts
446-452 cube stock stroke Stock stroke steel crank (with some love) 6.8-7.1" Con rods 10.5 Comp .600" at the valve and zero lash Solid flat tappet is preferred but a solid roller is optional Rocker arms must comply with Stock Eliminator rules 915 casting cylinder heads ported with no filling of any kind Passenger car headers with a minimum 3.5" collector 950 carb Conventional manifold ( RPM, Super Victor, M1 etc...)
That's pretty much it in a nutshell. Driveability is not really a concern as this is more of a dyno only EMC style build. I'm looking for max RPM capability somewhere close to 7000 if the heads can do it. An unspoken goal is 600-600+hp same or close in torque. J.Rob
Last edited by RAMM; 03/29/19 07:29 PM.
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: BradH]
#2638629
03/29/19 09:57 PM
03/29/19 09:57 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
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The heads can flow enough to make that power.
The rest of it is pretty cut and dried........ then tweak after it’s running.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: '915 440 build How much HP possible?
[Re: Dunnuck Racing]
#2638724
03/30/19 09:06 AM
03/30/19 09:06 AM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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master
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Charlotte, North Carolina
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My first dyno'd race engine was a 440 + .030" 915 heads with 2.14/1.88. Ross domes, Herbert roller, OOTB Team G and 9375 Holley 1050, Hooker 2 1/8" headers. Made 575 hp @ 6,100 rpm, 545 tq @ 5,400 rpm.. I'm sure, since this was so long ago, that better parts are available to well exceed the 600 hp goal that you want.
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Re: '915 440 build How much HP possible?
[Re: RAMM]
#2638726
03/30/19 09:11 AM
03/30/19 09:11 AM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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master
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There are some stipulations of course: Anything in bold is a must, no ifs ands or buts .600" at the valve and zero lash
Except for hydraulic style cams, I don't know where you are going to find a solid flat tappet or roller cam that will work at zero lash.
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Re: '915 440 build How much HP possible?
[Re: sgcuda]
#2638733
03/30/19 09:27 AM
03/30/19 09:27 AM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
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There are some stipulations of course: Anything in bold is a must, no ifs ands or buts .600" at the valve and zero lash
Except for hydraulic style cams, I don't know where you are going to find a solid flat tappet or roller cam that will work at zero lash. I’m sure that spec is for rules compliance checking only.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: '915 440 build How much HP possible?
[Re: sgcuda]
#2638742
03/30/19 09:44 AM
03/30/19 09:44 AM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
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The main questions I have are, if it’s an actual contest build, what is the tested rpm range, and is it a “10.5:1cr” rule?(meaning 10.51:1 is grounds for DQ)
The lowish lift makes the rocker selection easier....... just use 1.5’s.
Part numbered off the shelf headers required?
“950” carb. How is that being determined? Any carb marketed as a “950”?
Seems pretty straightforward....... Get the heads into the 290cfm range........try a couple intake manifolds(carb spacers?), maybe a cam or two.
What’s the oil pan rule? I assume there’s a spec fuel too?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: '915 440 build How much HP possible?
[Re: fast68plymouth]
#2638751
03/30/19 10:08 AM
03/30/19 10:08 AM
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Joined: Jul 2005
Posts: 336 Creston, Iowa
340man4ever
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Creston, Iowa
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Mine:
1974 Dodge Dart 2dr 3300lbs at the line.
440 zero decked w/flat top pistons. Ported 915 heads flow 268/207 peak. 11.25:1 Compression
Mopar 590 Solid Cam
850 HP carb- Wilson Tapered Carb Spacer 1", M1 intake, McCandless/ ProParts Headers
727 trans w/ Dynamic 9.5 converter (hi gear flashes 5100) 4.30 gear, 30x9 slicks
Footbrake @ 1800rpm shift at 6200
Bests so far:
10.77 @ 122.8 mph 1/4
1.47 60 ft 6.80 @ 99.79 1/8th
This is the rundown on my home built 440..........engine dynoed 560 HP @ 6200 and 520lbs torque
Yours would have roller cam, better flowing heads and bigger carb.......less compression
With attention to detail and some Engine Masters tricks I would say 600 plus would be attainable
Good luck with your project
Last edited by 340man4ever; 03/30/19 10:11 AM.
Curator at Adams County Speed Shop
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Re: '915 440 build How much HP possible?
[Re: Cab_Burge]
#2638755
03/30/19 10:13 AM
03/30/19 10:13 AM
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Joined: Feb 2006
Posts: 1,048 The Great White North
RAMM
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If it was me I would have the stock crankshaft offset stroke down to BB Chevy rod journal size along with increasing the stroke to 3.90 or 3.91, which ever your crank grinder can get out of it. This will allow you a lot better choice on the rods and pistons also But I ain't you Stock stroke is in bold, however I do agree and will turn the rods to 2.200" just for the superior rod selection and reduced bearing speed. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: 1Fast340]
#2638759
03/30/19 10:25 AM
03/30/19 10:25 AM
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RAMM
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Many years ago there was an build article in one of the magazines where a iron headed 440 made some 660 hp i wish i remembered more but it had ported production heads. so it can be done thats for sure. That had a tunnel ram and 12.5 comp--so not even close to comparable. It was Dulcich's IronHeaded Air Hammer that you are thinking of I bet. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: fast68plymouth]
#2638760
03/30/19 10:26 AM
03/30/19 10:26 AM
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Joined: Feb 2006
Posts: 1,048 The Great White North
RAMM
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The heads can flow enough to make that power.
The rest of it is pretty cut and dried........ then tweak after it’s running. And how much flow is that? J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: sgcuda]
#2638761
03/30/19 10:28 AM
03/30/19 10:28 AM
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Joined: Feb 2006
Posts: 1,048 The Great White North
RAMM
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OP
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My first dyno'd race engine was a 440 + .030" 915 heads with 2.14/1.88. Ross domes, Herbert roller, OOTB Team G and 9375 Holley 1050, Hooker 2 1/8" headers. Made 575 hp @ 6,100 rpm, 545 tq @ 5,400 rpm.. I'm sure, since this was so long ago, that better parts are available to well exceed the 600 hp goal that you want. I hope you're right but the '915 heads are the limiting factor here. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: krautrock]
#2638763
03/30/19 10:28 AM
03/30/19 10:28 AM
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Joined: Feb 2006
Posts: 1,048 The Great White North
RAMM
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it was a Dulcich build and he ported some 915's and put 2.19 intake valves in them i think. the big HP number was with a tunnel ram also ported, with two holley 9379 carbs...
the article is online, it can be found with a google search. maybe search "mopar 440 9379 915 heads" Correct and it had big compression too. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: '915 440 build How much HP possible?
[Re: RAMM]
#2638764
03/30/19 10:29 AM
03/30/19 10:29 AM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
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I Live Here
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I had some cnc’d ones here that flowed mid-290’s.
No holes, no fill.
Those were the best flowing non-MW factory iron heads I’ve tested.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: '915 440 build How much HP possible?
[Re: fast68plymouth]
#2638766
03/30/19 10:30 AM
03/30/19 10:30 AM
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Joined: Feb 2006
Posts: 1,048 The Great White North
RAMM
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OP
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There are some stipulations of course: Anything in bold is a must, no ifs ands or buts .600" at the valve and zero lash
Except for hydraulic style cams, I don't know where you are going to find a solid flat tappet or roller cam that will work at zero lash. I’m sure that spec is for rules compliance checking only. Correct again Dwayne, I should have been more clear and said .580" the max lift. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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