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440 HP upgrades

  
Mopar Muscle
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440 HP upgrades

 
scuba1x scuba1x
New User | Posts: 1 | Joined: 09/13
Posted: 09/11/13
12:16 PM

I have a 1966 sports fury 440 with a recent stock engine rebuild, edlebrock performer intake, edlebrock 750CFM carb, and performance electronic distributor.

Car feels like it has 300-325HP at the wheels.

What would be the biggest bang for the buck performance upgrade: headers, cam, ect?

Any recommendation on specific vendors or part numbers?

Thanks  

451Mopar 451Mopar
User | Posts: 220 | Joined: 07/10
Posted: 09/15/13
04:37 AM

IQ52 is doing some comparison tests.
Here is a link

http://www.forbbodiesonly.com/moparforum/showthread.php?58687-Iron-head-test-starting-on-78-440  

IQ52 IQ52
Guru | Posts: 857 | Joined: 06/10
Posted: 09/20/13
08:34 AM

This is flywheel horsepower

..........Stock 7.45:1 compression 440...........change to MP 509 cam

RPM..............TQ/HP..............................TQ/HP

2500......................................................
3000............378/216............................373/213
3200............378/230............................377/230
3400............379/245............................384/248
3600............367/252............................377/259
3800............364/263............................374/271
4000............363/277............................367/279
4200............351/280............................357/285
4400............326/273............................344/288
4600............312/274............................341/299
4800............301/275............................341/312
5000............271/258............................329/313
5200............257/254............................292/289
5400............223/229............................277/284

I am not recommending this camshaft, this is simply what happened when we installed it.

Days later, the same stock engine with some break in time and an additional two degrees ignition timing.

.....back to same stock cam in engine...just change to headers

RPM.............TQ/HP...........................TQ/HP

2500...........414/197.........................426/203
3000...........403/230.........................419/239
3200...........399/243.........................417/254
3400...........391/253.........................406/263
3600...........380/261.........................393/269
3800...........365/264.........................376/272
4000...........350/266.........................368/280
4200...........336/268.........................357/285
4400...........323/271.........................342/287
4600...........304/266.........................318/278
4800...........283/259.........................298/272
5000...........260/248.........................271/257
5200...........231/229.........................247/244
5400...........214/220.........................224/230

Your biggest changes will come with cam and cylinder head improvements. Smaller incremental changes with carburetor, intake manifold and headers.

If you are running the stock type cast iron log exhaust manifolds and change to the HP type cast iron exhaust manifolds you will gain nothing, don't waste your time or money.  

IQ52 IQ52
Guru | Posts: 857 | Joined: 06/10
Posted: 09/24/13
03:11 PM

The last test on the engine was with 516 heads flowing 250 cfm @ .500" lift, 509 cam, stock rockers, M1 single plane intake, 850 Mighty Demon, headers and still at 7.85:1 compression. It went like this.

RPM.......TQ........HP

3000.....434.......248
3200.....457.......278 notice, more HP @ 3200 rpm than at anytime in the first test, well 2 hp short
3400.....462.......299
3600.....447.......307
3800.....443.......321
4000.....450.......343
4200.....461.......368
4400.....461.......386
4600.....473.......414
4800.....467.......427
5000.....459.......437
5200.....453.......448
5400.....428.......440
5600.....407.......434
5800.....391.......431

Nothing fantastic, but it shows what you can accomplish in an afternoon bolting on the junk you have laying around.