LiveWire,

OK, here are all of my specs that I think you need to do this.

426W
Bore= 4.032
Stroke= 4.190
CR = 10.55:1 could be a little higher with the 58cc heads, but thats ok.
AFR 205cc heads

Cam Small base circle Crane hydraulic roller. Part # 44hr00027
Grind # HR-230-359-2s-12-rf
Lift is 574 intake, 595 exhaust.
rocker arm 1.60
advertised duration is 294 / 302
duration @ 050 is 230 /238

I run a single plane Super Victor Jr manifold,
750cfm holley mechanical secondaries.
MSD distributer
Jacobs pro street ignition.
1 3/4" headers.

If I left anything out, let me know, I have my cam sheet with me today.
And thanks for the info!
That should do it!

Thanks again

 

Thats not an exact match to your cam because I couldnt find the right numbers for it online. Can you check the part number or try and find a link on Jegs or Summit or Crane?

 

LiveWire,

thanks for your efforts. It doens't appear that my cam is made anymore, maybe it is a special order one?

Here are my other specs on the cam sheet.

cam timing @050
Intake Opens 8 btdc closes 42abdc
Exhaust Opens 56 bbdc closes 2 atdc
Max lift is 107/117

Timing @ tappet
Lift .004
intake opens 36 btdc closes 78 abdc 294 duration
exhaust opens 84 bbdc closes 38 atdc 302 duration

All based on zero lash as well.
I hope that helps or check the Cam below.



This Trick Flow cam has the exact same lift just a little more duration than mine.

TFS-51402002 in summitt. that one would be better I think.

 

Those are the numbers I needed thanks

 

Nice numbers

 

Holy Crap! I hope those are close to reality once this thing is back together!

There are a few chevy loving freaks that need to go down around here....

I will take it to the chasis dyno and we can compare numbers again after that.

Thanks again,

Joe

 

those are flywheel numbers so you should assume about 20% drivetrain loss but still very nice numbers

 

Yeah, but we should be able to see how close the program is. I have considered taking the motor to a engine dyno first, then I would know it is setup right. But I am not sure if I have enough $$$ to get that done.

Thanks again!

 

Also I guess swapping out the cam is no longer in question...Those numbers look great.

 

In my opinion Desktop Dyno is a little optimistic, at least thats what I found with my (much milder) build. This is a 357W (bored only), with 9.5:1, perf-rpm heads and intake, holley 750, 1-5/8 long tubes, 224/236 .506/.506 110O hyrdraulic.




Drivetrain parasitic loss can vary greatly, if you have a standard, and with such high output you could well see less than 20% loss. I am expecting 20+% on mine, the 9-inch rear and the AOD are gonna stink some ooomph for sure.

 

I'm sure those numbers are if all things are just right and perfect. I was hoping for around 550hp so I still think I will be in the ballpark.
It's just nice to see that grapgh...

 

Couldn't agree more! I was expecting about 420fwhp from mine, not the 445 DTD showed.