I am looking at a 60 over 455, J heads, ported and polished, forged 10:25-1 pistons, cross drilled nodular crank, Lunati 224/225dur. 496-523 lift cam, torker intake, 750 holley. Any guess on approx. hp and torque numbers?

Thanks

 

475hp/525tq.
And if not all, virtually all N cranks are cross drilled on journals 1, 2, and 4. And that's not a good thing.

 

Interesting,cutlassefi...I remember you thinking that a .060 455 with Edlebrock heads,Full roller.Mondello Cam 540/540 236/244,using a performer intake wouldn't make 450hp with a 750 holley.I guess that torker with the 750 makes a bigger difference that I realized..Pistons I use are forged 10.3 There have been many opinions in regards to ported/polished vs Aluminum heads.I would think what I use are as good as the ported/polished J's.Reason I post is I was shooting for those 475/530 numbers also,and thought I came up way short.

 

Well it also depends on if you're talking measured hp or corrected hp. For his estimate I averaged both.
You'll make 500 corrected, but most likely about 450-460 measured in real world conditions.
Look at Edin (70cutty) dyno sheets. His made 456 measured in crappy fl air, but 493 corrected.
Maybe I was mistaken, or there's something else that influenced my estimate for your build. Sorry.

 

why is a cross drilled crank a bad thing?... i remember joe mondello saying all his performance cranks were fully cross drilled

 

Here's one of many articles on it. Scat quit doing it to most of their cranks years ago as well.
http://rehermorrison.com/tech-talk-5...calls-part-ii/

Couple that with the full groove mains that Clevite sells for 455's and you're fighting for oil volume everywhere in the bottom end imo.
I don't use the Clevite mains anymore. I use the Federal Mogul 3/4 groove race bearing now with great luck. It's part number 108M.

 

No thread hijack intended, but this is a question complimentary to the build HP discussion here. Could Mark and/or some or the other BBO build experts speak to the benefits of performer vs torker? The stuff I found on line is outdated or mostly based on opinions of people I don't recognize. One question I'd like to know is; in a build similar to the two motors in this thread, how much HP is on the table relative to the intake (performer/torker)? My build is similar with a little more duration and .640" lift. I have a Performer and a Holley 850 and ported "C" heads. I value street performance but if I'm ignoring 50 HP, I would probably swap.

Thanks

George

 

Always value your opinion and appreciate your real world results.Thanks Mark.

 

I'd be surprised if you're sacrificing more than 20hp at peak but that will come at the expense of low end power.
The combination and overall rpm level will dictate the type of manifold used, single plane vs dual plane. Personally I think the Performer is underrated. I've found it to make comparable power in all but the more strip only oriented builds.

 

http://rehermorrison.com/tech-talk-5...calls-part-ii/Holy displacement, Batman!

 

Thanks Mark,

I,ll stick with my current setup then.
Plan is to take her to the strip next Sat. first time.

George

 

I have to agree with Mark. I am no expert and posting because i have used both in street car conditions as well as racing. The performer is better for street and torker for track. The hp sacrifice depends on many factors besides just intake. I am talking is the engine getting air and how. Also headers can make a difference as to what brand and size. When in doubt ask Mark i have found his info input to be very good.

 

I mis spoke about the heads. They are actually ported and polished E heads.
Does this help or hurt? I have a set of reworked C heads I can swap if it would be better...

 

The heads have similar flow in stock form, and once ported (if done well) it doesn't really matter which casting they are.

 

All depends on the port work done, depends on what was done to both heads. The J heads have a terrible exhaust port, stock E or C would be an improvement over all but max ported J heads.

 

I do not like answering these, it is only a guess, and many other things need to be addressed for maximum output.
Ignition Timing/ timing curve/total timing
Your altitude/ jetting of the smallish (for a 455 -my opinion) 750
Is crossover plugged, or filled?
Headers? What kind? Mufflers and exhaust pipes? Length of all?
Accessories? Power steering, A/C, water pump?
Cooling system/ fan type/ pulley sizes?
Car Craft did a test and found 45 hp going from mech fan to electric.
Carb spacer? 1/2", 1'', 2'', open or 4 hole/ plastic or wood?
Cool can? Clothespins on steel fuel line, or a real heat sink? Line shrouding?
Ram air, factory aircleaner, or chrome 14x3. 1 or 2 filters?
What kind of oil?

There could be way over 100 hp in just the items I mentioned, and we have yet to even talk compression, pistons, head gaskets, cam advance, let alone valve angles, sizes or clearances.

Anything with info posted is a WAG.
Good luck.

 

Do you know the part number for this cam?