Id like your input/thoughts

This 540 would not be real practical street driving today Grumpy.
$10 Per gallon race Fuel.
Crower stack injection with no air cleaner.
Suck dust in all the time.
Rain a problem for sure.
Radical race cam.
Going to drink fuel like crazy.

Kinda neat to see past tech though.
 
the first engine suggested was designed for the street and transportation,
the second engine configuration with changes was clearly suggested as a race only engine.
 
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the first engine suggested was designed for the street and transportation,
the second engine configuration with changes was clearly suggested as a race only engine.
2nd one I consider Vintage Race Build and improved with 315 CC AFR heads.

Turbo (s) + Big Block Chevy are expensive.

Goals and cash outlay must be considered.
 
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the first engine suggested was designed for the street and transportation,
the second engine configuration with changes was clearly suggested as a race only engine.
Back at it Grumpy.
I tried IR Stack injection with 3300 cfm total flow.
Falling way short of expectations.
To get near 1000 HP Normal Aspirated takes some careful planning.
Theory and race math.

Best I have so far is 900 Hp NA.
I let the program pick the cam.
104 degrees Overlap advertised.

Just a difficult engine to get 100 % VE or more.

Thinking it has to do much with piston speeds present.
Likely get better with 4.300" stroke or 4.500".
Guestimating for now there.
 
The Large Bore of a 540 BBC maybe has alot to do with cylinder fill rates.

Alot easier to do with a Pontiac 455 in past for me.
Smaller bore size.
4.21" stroke.
Of course Power output is lower than a 540 BBC.
 
cylinder fill efficiency is a compromise, your engine design is forced to make selecting the way components are matched,
the factors of cam timing compression and exhaust header tuning all must be selected carefully too fall in the same 3000 rpm power band and ideally in the same 1500 rpm range to maximize power.
the choices between cam timing and compression ratio, and head and intake flow rates, valve size and valve lift and duration,
has a huge effect on,exhaust scavenging and while most people think the port flow rate is mostly the result of the piston dropping away from TDC,
lowering the cylinder pressure , thus drawing in the intake runner charge, this is not the major factor once the engine rpms increase significantly.
its exhaust scavenging during the valve over lap , being well matched to the engine displacement and cam timing, header diameter, and length, and collector design,
and intake ram tuning that can significantly boost cylinder fill and cylinder scavenging efficiency rates.
OK, first fact! the piston can,t compress anything being trapped in the cylinder by the piston compressing it as it raises,until both valves seat & seal

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http://garage.grumpysperformance.com/index.php?threads/calculate-compression.9162/#post-32706

http://garage.grumpysperformance.co...lsa-effects-your-compression-torque-dcr.1070/
 
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The 540 With the Crower Cam liked the stepped headers option Grumpy.
Need Pipe Max or actual Logarithms or Calculas formulas and do it ling hand on paper.
Definitely wants lots of Cam Overlap.
It will be tamed down alot by large cubic inches present.
 
yes theres little question, that a 13.5:1 compression 540 bbc engine,
built to use stack injection and effective cylinder scavenging should have a cam with about a 103-104 lsa,
too maximize the cylinder scavenging, during valve over-lap, and cylinder fill efficiency.
finding one without having to pay for a custom grind cam can be rather difficult
certainly you do the math and tweak the parts selection as required.
your correct, the cam should have a tight 103-107 lsa and at least .650 lift,
to work correctly with individual stack injection in a 13.5:1 compression 540 BBC.
If I was building it for personal use,
Id sit down and figure out each factor,
but the ball park configuration I listed,
was used to show what a couple changes in the parts list can do,
to change the engines power curve.
 
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yes theres little question, that a 13.5:1 compression 540 bbc engine,
built to use stack injection and effective cylinder scavenging should have a cam with about a 103-104 lsa,
too maximize the cylinder scavenging, during valve over-lap, and cylinder fill efficiency.
finding one without having to pay for a custom grind cam can be rather difficult
certainly you do the math and tweak the parts selection as required.
your correct, the cam should have a tight 103-107 lsa and at least .650 lift,
to work correctly with individual stack injection in a 13.5:1 compression 540 BBC.
If I was building it for personal use,
Id sit down and figure out each factor,
but the ball park configuration I listed,
was used to show what a couple changes in the parts list can do,
to change the engines power curve.
Alot of ways to compare Grumpy.
I like the Crane Grind best.
Makes it a Street engine.
Otherwise a 540 is a go for broke race engine.

Thinking a 572 is better.
A few different ways to build as you know likewise .
 
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