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Any significant hp gain on this 440 rebuild?

Started by R6red4spd69RT, April 28, 2009, 07:14:12 PM

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R6red4spd69RT

April 28, 2009, 07:14:12 PM
Hi guys,

I'm getting back to being involved with my ride (life stuff) and was wondering about what I actually ended up with on my 69 440 HP engine rebuild. I went the route of "close to original with a little kick" awhile back and was curious if there was any significant power gain I really came up with in hp terms. I know a dyno would reveal this but I thought I would consult the Mopar brain trust.

Intake and exhaust are stock along with the heads, and there's an edelbrock 1407 sitting on it.

I was also curious what you all thought the max safe RPMs are on this thing.

The Comp cam listed is duration 270/270 and lift is .470/.470. I believe the "Hyp. pistons" refers to hypereutectic pistons.

It feels strong to me but the car wasn't running before the restoration and rebuild so I can't compare it to what it was before.

Thanks

Rolling_Thunder

#1
April 28, 2009, 07:45:59 PM
well you probably picked up a couple lb-ft of torque down low but that cam and everything else is so close to stock it is pretty much the same as the factory output.    :Twocents:
1968 Dodge Charger - 6.1L Hemi / 6-speed / 3.55 Sure Grip

2013 Dodge Challenger R/T - 5.7L Hemi / 6-speed / 3.73 Limited Slip

1964 Dodge Polara 500 - 440 / 4-speed / 3.91 Sure Grip

1973 Dodge Challenger Rallye - 340 / A-518 / 3.23 Sure Grip

firefighter3931

#2
April 28, 2009, 09:29:03 PM
 :iagree: Basicly a stock rebuild with a slightly better than stock cam profile.


Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

R6red4spd69RT

#3
April 28, 2009, 10:47:00 PM
Thanks guys,

I appreciate your input, looks like I accomplished what I was trying to achieve. Though I'm still wondering about the approx max RPM for a very close to stock 1969 440 Magnum.

 

mopar_nut_440_6

#4
April 28, 2009, 11:30:15 PM
5000 - 5500 rpm is all you will need anything more is just noise.
1968 Charger R/T 440 
2004 Dodge Ram 2500 680 HP Cummins with attitude

Rolling_Thunder

#5
April 29, 2009, 01:45:52 AM
~5500rpm is where that cam would peak
1968 Dodge Charger - 6.1L Hemi / 6-speed / 3.55 Sure Grip

2013 Dodge Challenger R/T - 5.7L Hemi / 6-speed / 3.73 Limited Slip

1964 Dodge Polara 500 - 440 / 4-speed / 3.91 Sure Grip

1973 Dodge Challenger Rallye - 340 / A-518 / 3.23 Sure Grip

R6red4spd69RT

#6
April 29, 2009, 10:13:20 PM
Somewhat of a side note here, I've been considering changing out the stock intake for the Weiand 8009 because I like the stock appearance and low profile. Do you think it's a good swap over the stock intake for performance?

green69rt

#7
April 29, 2009, 10:22:15 PM
Quote from: Rolling_Thunder on April 29, 2009, 01:45:52 AM
~5500rpm is where that cam would peak

I don't know about peak but I would limit to 5500 RPM to keep the engine together..  With your specs I think you will be way over the horsepower curve at that point.   Anybody got the HP/RPM curve for a stock 440 engine??
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