I sure will gonna be approx 2 weeks before the procharger is ready for pickup. I already am setup for a gen I sbc so it is cheaper for me to reuse some things for the new 421. Going with the F1A all polished with (red) open race bov and competition carb bonnet.

 

I run a similar sbc dart little m block 406 245 afr heads sm blower cam vortex v7 cog Ysi makes gobs of power.

 

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Duration at .050 int,254 ex, 262 114 separation lift 582 in/ex

 

69 nova rossler terminator 2 turbo 400 w a brake 12 bolt 35 spline axles

 

Honestly just a badazz street car had a little trouble with ignition early on but made no passes yet

 

Hello Jason!

How much do your heads flow at atmospheric pressure?

Roger

 

[email protected] lift not using all of it my solid roller is only in the low .600 but with the blower they really breath as u get up in the Rpms with zero low end issues.

 

Jason,

For a good flow number ratio for heads, figure 1 cfm of intake flow for every 1 cubic inch of displacement. NASCAR used this formula for years and is now above this figure. My all aluminum 427 SOHC Ford Cammer is running aftermarket custum raised intake and exasust ports with a custom CNC port that is flowing 450 CFM at 0.800 lift, and that is what I plan on running under my huffer.

Still, your 421 sbc should make good power for the street, I am just not a fan of long arm Small Blocks, a 427 BBC is going to have a larger bore with shorter stroke, this has the benefit of unshrowding the valves, running a better rod length and angle, and the engine is not side loading as much and trying to rip the block apart. All else being equal, the bigger bore / shorter stroke engine will make more horsepower

Roger

 

Don't mean to correct but it's a 406 sbc i mean no disrespect by saying that and your probably wright but it's just kinda a bad azz street car that seems to really work well.

 

And those flow numbers only exists if your in that lift number and can create maximum volumetric efficiencies rarely happens.

 

No disrespect intended from me or received by me.... Only trying to share information to increase each others knowledge base

Roger

 

o

Jason,

Available aftermarket 427 SOHC Cammer Cams go up to 0.700" lift at the valve. Custom Bilet cores can be ordered and used with stock rockers up to 0.750" Lift.

By changing the cams base circle and custom modifying aftermarket lifters, 0.800" lift is possible!

I am going to be running the custom Billet cam cores with modified base circle and modified rockers to achieve 0.800" lift on a 2.350" Titanium intake valve with Berylium seats.

Current plan is to overdrive a 10/71 with Bird Catcher hat on Alcohol on the street

Running an aftermarket Big Bore, Siamese cylinder optioned Shelby / Arias block with lifter valley webbing and 6 bolt, cross bolted and stud located billet steel main caps, Windberg billet crank with 2.0 diameter SBC Carrilo rods.

Shifts will be at 8,000 RPMs for starters with motor hitting over 10,000 RPM between shifts.

Liberty Trans.

Roger