My combo

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6

69Chrgr

Charger/Cuda
Joined
Jan 29, 2007
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Location
Midlothian, Texas
O.k. guys, can't get to a dyno before I put the motor in my '68 Nothchback, but I value ya'lls (Texas talk) opinions. Please tell me what your honest opinion of h.p. and torque would be with my completed combo.

360 Magnum block bores .030
Eagle 4.00 crank
Eagle I-beam rods
Protru forged pistons
chrome moly rings
block zero decked
Windage tray
Milodon 8 quart pan
ATI Balancer
ARP main and head bolts
Eddy heads out of box, not porting
Hughes custom hyd. roller cam .565 exh., .595 int., 305 duration?
Hughes matched valve springs
crane 1.6 roller rockers
M1 single plane intake

That's all I can think of right now.
Thanks,
Darren
MSD "Ready to Run" ign.
750 double pumper Demon
 
Well, a quick look says to me around 500-520hp, but you're limiting it with the carb and cam choice. I do hope you have those numbers backwards...(int and exh swapped...)
 
I agree with Moper, The cam seems small. what are the duration @.050" specs ?

The stroker would like a Holley 950hp
 
That sounds like an excellent street-strip engine, I would not change a thing. I like the cam, and the carb is perfect for the combo.
 
How can you tell the cam is perfect with out any specs other then the lift ?

Is that lift with the 1.6 ratio rocker your going to use or with the 1.5s its most likely soec for ?
 
Thanks guys. I'll get the exact spec's from my cam card from Hughes. I kind of thought it was a pretty radical cam for street, as Hughes custom ground the cam to the weight of the car, gears, converter, heads, intake and carb. I was thinking more around 450 horsepower, but I'm always conservative. It also has underdrive pulleys as well and 10.5:1 compression. Thanks for all of the input!:D
 
AdamR said:
How can you tell the cam is perfect with out any specs other then the lift ?

Is that lift with the 1.6 ratio rocker your going to use or with the 1.5s its most likely soec for ?
Click to expand...

I told Hughes I had 1.6 rockers, so that should be about right. I'm probably off on the cam specs, I'll post when I get home on more accurate cam specs.
 
What I see odd is the more lift on the intake side. That's radically differemt than anything I've seen or used. You cant tell anythign more wihtout real specs. Duration at .020 ans .050 would help, as will the figuring at 1.5 or the 1.6 you run. You can only lift so fast with a hydraulic roller, so it cant be too radical. But if the durations up there, you should make ok power. Normally, you see cam grinders giving more lift and duration to the exh side on a split duration cam. All that cam would do on most heads is realy hurt the intake to exh ratio. I dont think it would do much to help power, unless the entire exh system was extremely good at it's job. That's why I think you may have the specs right, but the sides wrong...lol.
 
I was thinking 430 - 470 ,used to have a similar combo cam dynamics 565 585 solid around 300 duration only stock stroke but 12.5 to 1 ,figured compression made up for stroking. used kb 191s with .045 quench
 
You will make around 430 - 450 hp. and 500 tq. peak hp will be about 5700 peak tq. will be around 3700-3900
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moper said:
What I see odd is the more lift on the intake side. That's radically differemt than anything I've seen or used. You cant tell anythign more wihtout real specs. Duration at .020 ans .050 would help, as will the figuring at 1.5 or the 1.6 you run. You can only lift so fast with a hydraulic roller, so it cant be too radical. But if the durations up there, you should make ok power. Normally, you see cam grinders giving more lift and duration to the exh side on a split duration cam. All that cam would do on most heads is realy hurt the intake to exh ratio. I dont think it would do much to help power, unless the entire exh system was extremely good at it's job. That's why I think you may have the specs right, but the sides wrong...lol.
Click to expand...

I think you're right about me having it backwards. Gotta find that cam card.
 
O.K., found my camcard
Lobe Separation 110 degrees
Installed centerline 107 degrees
Lobe Lift .350 intak .370 exh.
.525 intake lift
.555 exh. lift
That's spec'd with 1.5 rockers, I have 1.6 rollers
duration @ .050 242 intake 246 exhaust
Hughes sent matching valvesprings.

So what kind of ballpark figure ya'll think?
Thanks,
Darren
 
69Chrgr said:
O.K., found my camcard
Lobe Separation 110 degrees
Installed centerline 107 degrees
Lobe Lift .350 intak .370 exh.
.525 intake lift
.555 exh. lift
That's spec'd with 1.5 rockers, I have 1.6 rollers
duration @ .050 242 intake 246 exhaust
Hughes sent matching valvesprings.

So what kind of ballpark figure ya'll think?
Thanks,
Darren
Click to expand...

With that cam 450-470 h.p....
 
I think somewhere around 430hp but very close to 500 pound feet of torque will be close. If you cant dyno it, run it down the track and get an accurate weight reading on the car and figure it out that way.
 
Is this going to be enough motor to get me into the high 11's, provided the rest of the chassis is setup right? I have a 3200 stall, 998 trans, and 3.91 8 3/4 rear.
Thanks!
 
If you can get everything debugged, certainly. But you may need to go with short slicks, or more gearing. Hard to say with the low first gearing of the trans. Might not be way into the 11s, but it should do it.
 
'64 Cuda said:
69Chrgr,

Was there a big difference in price between a custom grind from Hughes & one of their off the shelf cams?
Click to expand...

Not really sure 64 'Cuda. I had just spoke to people here, and they highly recommended Hughes grind a custom cam, so I did. My custom cam however was pretty pricey.
 
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