557 stroker carb size advice

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  #16  
Old 09-21-2004, 03:18 PM
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What Hyd roller cam was this and how would you ever keep the drive line together with those #s?

Also, thanks alot guys for whetting my appetite to lighten up my wallet, both for the parts and the fuel!
 
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Old 09-21-2004, 03:32 PM
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Originally Posted by Brad Johnson
tmyers - I ran the sim above using a plain hydraulic lifter. I reran it with the hydraulic roller profile. You will likey

RPM HP / Torque
2000 227 / 596
2500 290 / 609
3000 352 / 616
3500 416 / 624
4000 476 / 625
4500 528 / 616
5000 563 / 536
5500 575 / 592
6000 557 / 549
6500 527 / 488

Brad
Brad can you post the grind for that again, please. Ty
 
  #18  
Old 09-21-2004, 03:51 PM
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I used your cam numbers above, but just plugged in a roller profile instead of a flat-tappet profile. The Crane Cam 325-2S-12 hydraulic roller piece produced similar numbers.

Brad
 
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Old 09-21-2004, 04:02 PM
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What Hyd roller cam was this and how would you ever keep the drive line together with those #s?
The tranny should hold it, as should the rear end. U-joints are a weak link in the late 70's stuff. I'm not so sure what the transfer case will take. Someone else will have to chime in here.
 
  #20  
Old 09-21-2004, 04:55 PM
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NP 205 TC is all gears (no chain) and cast iron and some feel it's one of the strongest out there.
 
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Old 09-22-2004, 01:25 AM
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Please correct me if I'm wrong here but I'm assuming that a hydralic roller, with published specs similiar to a std hydralic cam, will produce quite a bit more HP and torque because the lobe ramps are steeper from .050, over the nose and, back to .050.
 
  #22  
Old 09-22-2004, 10:06 AM
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I'm starting to lean towards the middle of the three Crane hydralic rollers now. I think it's the same one Brad listed above. From my research, Crane produces the only hydralic roller for the 460.
 
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Old 09-22-2004, 02:18 PM
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The more aggressive roller profiles will make more power at the same overall duration and lift. It results from the better airflow characteristics at partial lift. You also get a free couple of HP in the reduced parasitic power loss. The downside is the overall extra cost, but in the dollar-per-HP catagory it's a pretty good deal.

Brad
 
  #24  
Old 10-04-2004, 12:54 PM
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Originally Posted by rheacox
I'm starting to lean towards the middle of the three Crane hydralic rollers now. I think it's the same one Brad listed above. From my research, Crane produces the only hydralic roller for the 460.
Cam Research Corp custom grinds all types of cams in house and only for the BBF. He is a specialist and makes some fantastic lobes. If you have not yet ordered the Crane (Crane is a very good cam manufacturer as well!) Please go to Cam Research's (The Thundermaker Camshafts) website and call him up. Scott is a great guy and will take the time to talk about the engine in great detail and come up with the very best cam grind for your exact combination. Try it, your gonna like it.
 
  #25  
Old 10-12-2004, 11:09 AM
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np205

The last thing you'll break is the 205. I'd say the axle shaft is probably the weak link.
 
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