Id like your input/thoughts

The stack injection moved the Torque Curve 500 rpms Lower Grumpy & increased VE to 97 %.
I can see the Ram Tuning working.
Or as I like to call it Finate Amplitude Waves at work.
 
Sorry Grumpy.
Skewed again.

I keep losing the Crower Cam Specs.
Make an induction change & defaults back to Base cam in program.
I recall baseline computer is ISKY cams profiles.
Have to redo...
 
5ZQSq4e.png



Crower 290R.
2800 CFM Stack Injection.
 
Desktop Dyno 2000 is finding better Cam profile Picks Grumpy Automatic.
All Isky Cam Based I recall reading.
Have the Book By Curtis Levington.

Early on tonight the Crane Cam Pick of Yours showed about 100 HP more bumping compression from 9.3 to 13.5 :1.
 
The Crower 290R I think is Engineered to soften the Hard Hit Blow of a 540 BBC Grumpy.
Tame it down.
Still a Beast.
I don't think its Scavenging correct as we want.
Intake valve is closing early along with exhaust valve closing early.
Not enough Blow down time for sure.
I Retarded the Crower Cam camshaft in - 2 degree increments.
To -12 degrees.
Each time HP Picked up.

Advancing the cam brought or fattened up the torque curve.
Well over 800 ft/lbs down low.
Never ever hookup up without a 16 point rollcage.
Full Back halved.
Chrome Moly 4 Link coil over shocks.
Race Turbo 400 or Jerico 4-speed required.
 
There are a Few Crower Cams that can Deliver 100%-112 VE I have tried in the past DD2000 Grumpy.
They Have the Skull & Cross Bones next to profiles in the Crower Catalog.....DEATH.
You know these Big Inch Stroker BBC Better than I do yet.

I know which ones work in a Pontiac 455.
Crower.
Isky....Danger Zone Emergency Power Just in case built in.
 
I am seeing a 5 -7% V.E. Gain using Stack Injection I.R. Tuning Induction on Average Grumpy despite 2800 cfm airflow falling short what the 540 BBC wants.
Its an Air & Fuel thirsty Beast.
 
what your overlooking and the software dyno is overlooking and can,t show properly is that stack injectors are air flow rated at a steady flow similar to how they measure carb flow rates
, but stack injection has a long individual column of air suspended over each individual intake runner, once the rpms increase at some point ram tuning is induced and that column of air has weight and inertia,
the flow rate, just like a carb increases to match the demand and its not limited to the rated flow its artificially assigned or rated at, I don,t know any software that adequately shows the true effect.
Id also point out that exhaust scavenging works far more effectively with stack injection

https://www.hotrod.com/articles/hrdp-9907-ram-tuning-guide/

http://garage.grumpysperformance.com/index.php?threads/mechanical-constant-flow-injection.4502/
exhaustpressure.jpg

EXFLOWZ4.jpg
 
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Grumpy said:
what your overlooking and the software dyno is overlooking and can,t show properly is that stack injectors are air flow rated at a steady flow similar to how they measure carb flow rates
, but stack injection has a long individual column of air suspended over each individual intake runner, once the rpms increase at some point ram tuning is induced and that column of air has weight and inertia,
the flow rate, just like a carb increases to match the demand and its not limited to the rated flow its artificially assigned or rated at, I don,t know any software that adequately shows the true effect.
Id also point out that exhaust scavenging works far more effectively with stack injection

https://www.hotrod.com/articles/hrdp-9907-ram-tuning-guide/

http://garage.grumpysperformance.com/index.php?threads/mechanical-constant-flow-injection.4502/
exhaustpressure.jpg

EXFLOWZ4.jpg
Click to expand...
Maybe just Pipe Max Grumpy.
I don't have that.
 
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I think youll find 3300 cfm is a more realistic value too use, in the soft ware,and an 18"-20" back of the intake valve to stack bell flare stack length, to get a more realistic expectation on that stack injection, I spent about 15 years tuning a crower constant flow stack injection on a 13.7:1 compression 496 BBC, its got a lot more potential than many people that don,t have tuning skills ever realize.
doing the math certainly won,t hurt, certainly adequate to supply a cylinder head port that flows into a cylinder head port that flows near 415 cfm on a 540 displacement engine

crowers stack injection has a 2.9" diam stack thats roughly 6 sq inches of cross sectional area

http://www.wallaceracing.com/runnertorquecalc.php

http://www.wallaceracing.com/intake-runner-length.php

http://hilborninjection.com/faq/common-plenum-vs-individual-runner/

https://www.borlainduction.com/351-427-fuel-injection-systems.html

https://www.enginelabs.com/news/video-the-difference-between-dual-quads-hilborn-8-stack-on-a-hemi/

http://www.eightstack.com/frequently asked questions.html

http://www.superchevy.com/how-to/engines-drivetrain/1305-hilborn-efi-system-testing/


read this thread
http://garage.grumpysperformance.com/index.php?threads/mechanical-constant-flow-injection.4502/
shar1.png

stacklm.png


Wave%20Pulse%20RPM%20Chart.jpg
 
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Grumpy said:
I think youll find 3300 cfm is a more realistic value too use, to get a more realistic expectation on that stack injection
Click to expand...
Try it again after work Grumpy.

I understand Ram Tuning.
Seen it opposite on Exhaust side Pontiac V8 1st hand.
Hooker Super Comp 4202 Big Tube 2.00" Round Ports headers.
 
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