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Re: Approximate Horsepower
[Re: elmor353]
#1763042
02/26/15 12:15 AM
02/26/15 12:15 AM
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Joined: Dec 2008
Posts: 2,782
USA
JoesMopar
master
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master
Joined: Dec 2008
Posts: 2,782
USA
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Re: Approximate Horsepower
[Re: elmor353]
#1763043
02/26/15 12:28 AM
02/26/15 12:28 AM
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Joined: Nov 2007
Posts: 21,824
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,824
Kirkland, Washington
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Your Pistons must be close to zero-deck? Are you sure about the 10:1? If so, I will estimate a little higher...425. Ported heads could get you to 450. That's assuming you can get a decent tune (36 degrees mechanical all in at 2500 or so on pump gas that I am assuming you are running)
You'll be on the ragged edge with today's crap gas and a true 10:1 iron head, but with quench, it can certainly be done.
Last edited by Pacnorthcuda; 02/26/15 12:31 AM.
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Re: Approximate Horsepower
[Re: Pacnorthcuda]
#1763044
02/26/15 12:30 AM
02/26/15 12:30 AM
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Joined: Jun 2006
Posts: 5,162
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,162
CT
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450 with a good valve job
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Approximate Horsepower
[Re: elmor353]
#1763045
02/26/15 12:33 AM
02/26/15 12:33 AM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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We dyno'd a newly done 440 that was in my Belvedere & it made 428 hp & 468 torque without a tuned carb & adjusting. I expect it to make 450 HP at this weekend's dyno session & then its up for sale.
67 HP block, Mopar forged crank, SRP pistons, Eagle rods, stock 906 heads w/ 1.7 Source roller rockers & big purple shaft hyd cam,
RPM dual plane & Holley carb. I was amazed it made that HP with unported 906 heads & no tune. All we did was check everything out, break in the cam, put on a shop carb & go. Build sounds close to yours & we're at almost 5,000 ft elevation, so I would think you're close to these numbers.
Last edited by Triggerfish; 02/26/15 12:34 AM.
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Re: Approximate Horsepower
[Re: Triggerfish]
#1763046
02/26/15 12:57 AM
02/26/15 12:57 AM
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Joined: Dec 2008
Posts: 2,782
USA
JoesMopar
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master
Joined: Dec 2008
Posts: 2,782
USA
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Quote:
We dyno'd a newly done 440 that was in my Belvedere & it made 428 hp & 468 torque without a tuned carb & adjusting. I expect it to make 450 HP at this weekend's dyno session & then its up for sale.
67 HP block, Mopar forged crank, SRP pistons, Eagle rods, stock 906 heads w/ 1.7 Source roller rockers & big purple shaft hyd cam,
RPM dual plane & Holley carb. I was amazed it made that HP with unported 906 heads & no tune. All we did was check everything out, break in the cam, put on a shop carb & go. Build sounds close to yours & we're at almost 5,000 ft elevation, so I would think you're close to these numbers.
Where did you get that stand? I like it. 
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Re: Approximate Horsepower
[Re: Pacnorthcuda]
#1763048
02/26/15 08:53 AM
02/26/15 08:53 AM
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Joined: Feb 2005
Posts: 4,314
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,314
Prospect, PA
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Quote:
Your Pistons must be close to zero-deck? Are you sure about the 10:1? If so, I will estimate a little higher...425. Ported heads could get you to 450. That's assuming you can get a decent tune (36 degrees mechanical all in at 2500 or so on pump gas that I am assuming you are running)
You'll be on the ragged edge with today's crap gas and a true 10:1 iron head, but with quench, it can certainly be done.
If he is at zero deck with a flat top piston, he'll be close to 11:1 and probably not be able to run pump gas.
If he has the 1.99" CH pistons he will probably be in the 10:1 range but without quench. Could work with that cam I think.
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Re: Approximate Horsepower
[Re: BSB67]
#1763049
02/26/15 04:09 PM
02/26/15 04:09 PM
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Joined: Aug 2003
Posts: 43,180
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,180
Bend,OR USA
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There is no way I would put together a 10.0 to 1 pump gas iron headed motor for street use with todays fuels  9.5 or lower to 1 works very well with a cooler spark plug at 2500 ft above sea level, the lower you go in elevation the easier it is to detonate a iron headed motor  My last pump gas 906 iron headed motor (512C.I. low deck 400 stroker) had 9.25 to 1 compression ratio with a six pak, it made 612 HP at 5500 RPM and 644 Ft. Lbs at 4500 RPM on a DTS engine dyno in Ontario, CA on there 91 octane non ethanol pump swillback in 2003  As far as your results, they will depend on your tuning ability, that carb is pretty small, same thing on the cam  The more air and fuel sucked into the motor the more power it will make Your deal in Reno should make 400 + hp and more torque than HP Isn't most of Reno, Sparks and the surrounding areas 4000+ Ft above sea level? If so you may be good with your compression ratio, be careful in the summer though  EDITED, I just saw that the OP is in Oregon, not Reno NV  OP where are you in OR, PM me if you want If your west of the Cascades and or below 1500 ft. elevation, be careful on the total timing and spark plug heat range
Last edited by Cab_Burge; 02/27/15 02:37 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Approximate Horsepower
[Re: Cab_Burge]
#1763052
02/27/15 12:21 PM
02/27/15 12:21 PM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Cab, the op is in oregon but yes, Reno's almost 4800 ft elevation
& our 91 pump gas sure isn't the best stuff. Hopefully, we'll dyno my 440 tomorrow & see what numbers it makes with a good tune & carb we just rebuilt. I don't know the cam specs, but it is a purple shaft hyd & didn't pull a lot of vacuum the first go round, so it may be bleeding off some compression as it didn't show any signs of detonation. Of course, everything is new in the motor, so there's no carbon build up in the heads yet. Anyway, maybe we'll measure the cam & do a cyl pressure test. I was pretty amazed that an iron (906) head 440 made that kind of power, but that 512 6 pak motor you built made some impressive power. I would think the op's 440 should be close to what mine made since he's at lower elevation.
Also, I do remember a few yrs back, a 426 iron head Hemi I had was close to 10:1, had a big cam & didn't ping in Reno, but sure did at sea level.
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Re: Approximate Horsepower
[Re: Steve Bryant]
#1763056
03/02/15 04:14 AM
03/02/15 04:14 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
My 440 dyno'd at 390 HP with a somewhat similar setup.
440 Bored .30
Eddy RPM Alum Intake
Holley 750 and Eddie 750 (Holley got 5 more HP)
Cam .462/.470 Lobe 110
Mopar temmplate port job on steel 452 heads with backcut valves
Cast HP Exhaust Manifolds
I think my compression calculated to about 9:1
We spent a little more time and money to get the heads opened up and it really helps my 440 to breathe.
-Steve
Has this combo ever been down a track? If so, what MPH and car weight?
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Approximate Horsepower
[Re: Von]
#1763057
03/02/15 04:17 AM
03/02/15 04:17 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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I cant see that being a 400 plus HP combo.
I threw together a stupid mild combo that according to the Wallace calculator (by 1/4 MPH and car weight) made 403HP. Similar to the OP's combo, but not exact.
I'll say it makes in the honest 350-375 range. With a "good" tune...it might get 400.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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