just want some reassurance on combo choices

Rick theres some, or several factors in that software thats not working correctly,
the combo should have zero problem reaching 500 ft lbs and 550 hp plus
Ive built too many engines to see and expect less with that combo
think about this
your similar combo runs a crower 00471 cam with 236 intake duration and ,adding 4 more degrees of intake duration certainly won,t drop the dynamic compression to 7:1
look closely at the cam cards they list a single degree difference at.050 lift for the intake close point, and only 3 degrees more duration at the intake opening
http://garage.grumpysperformance.com/index.php?threads/small-base-circle-cams.3810/#post-72526
crower00471.jpg


crn119651.png

keep in mind this is a small base circle cam with asymmetrical cam lobes you must use the .050 lift and duration numbers in calcs,
the difference in effective duration while small,
yet it aids upper rpm breathing slightly,
it certainly has minimal effect on dynamic compression,
thats one reason I suggest installing it at split overlap,
the extra 4 degrees retarded timing helps reduce any tendency toward detonation.
you know that your 406 SBC with its 00471 crower runs well and its
compression is just under the detonation threshold,
if properly tuned.
the crane 119651 will be similar, but should add about 400 rpm
crane119651.jpg

https://www.summitracing.com/parts/...MIisTdgsuL3QIVlrjACh0EnAAjEAAYASAAEgKCTvD_BwE

read link
http://www.hotrod.com/articles/hrdp-1010-what-you-need-to-know-about-mechanical-fuel-injection/

http://www.borlainduction.com/200094-v8-kit-chevy-big-block-35mm-air-horn.html

https://watermanracing.com/product-category/pumps/

https://kinsler.com/Shop/
 
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XWoGbNJ.png


Ran the Keith Black Dynamic Compression calculator.
The Isky HR 272/282 is a Real Nice Cam for the Street.
It will allow 87 Octane Pump Gas operation from what I am seeing.
Make Stellar Power & Care Free Driving with No Detonation issues.
Decent idle & not fuel foul out the spark plugs.
Use With Air Conditioning compressor also.

Make for 1 badass 400 SBC.
True Street Racer.
 
I found a few High Lift modern Isky Profiles too.
Isky Website has.
Need the Main Paper Back catalogues I have to get the Grind Numbers.

Moderate lift.
87 octane gas.
Have a Race Car engine that will last 100,000 miles +.
Just Like Pontiac Motor Division used to build.

High Lift should add 50 Hp or more.'Crack 600 HP.
Valvespring life will be shortened though on the street.
 
Isky HR272/282 does it with Dinky Tube Headers also. Used 1-5/8".

No one off 2 inch primary tubes that cost $5,000 -1oK to have made and own them.
 
Lots of ways to look at things Grumpy.
Since everyone is cruising most of the time 87 octane gas operation makes most logical sense.
Its $2.80 per gallon local 87 octane.
Shell Nitro 93 Octane is about 3.99 per gallon local.

Not Racing Hellcats or New Demons.

Only I can do that.
Must have Aero for speeds 140-200 mph.
70TA.

Rick does not stand a chance with his T.
Float and go off in a ditch.
He will be dead.
 
Maniacmechanic1 said:
I don't see many Dyno sheets that plot every 100 Rpm.
Test rpm starts at 4,000.
Race Shop Dyno.
Few can do pulls from 2000 rpm up.

I was thinking you had a 350 - 355 -358 sbc.
Its a 400 SBC.
Be more flexiable cam picks.

How Much power do you want ?
It does not matter ?

750 Hp can be done with a 400 SBC with good heads.
Have sing the RPMs & have real good parts.
Be Full Race.
Click to expand...
It was from a race shop, but that's all I have as for a street 406 build with the exact same head and 10.5 compression. 550hp/550hp would suit me.
 
Super cased Muncie M-21 with the higher 2.20:1 gear. It's not the easiest gear to start out on without being rough on the clutch. My other car I opted for the autogear M-23. Much easier with the lower 1st and the 505ci motor. Definitely have 3.42s.
 
Fair idle you would know it's not stock but would not have idle issues if you look at pics Brian posted the info is in the catalog.
 
Christopher Williams said:
I want a good lope, not a chop. But a really good lope. That comp 294hr sounded about what I am looking for
Click to expand...
Have to E85 a simul
Strictly Attitude said:
View attachment 10642
Click to expand...
At work now.
See if you can find exact IVO, IVC, EVO, SVC on that CC XR294 Cam John.
EVC+IVO= Overlap.
Give him what he wants.
85-100 degrees Overlap.
Shoot for a Super Brute Force Mega Hit Peak Torque at 4000 rpm.
See what is there at 2000RPM DD.
Try and get it in at 6500 peak Hp.
Lobe centers 100- 106 Target.
Going to need to slip the clutch at 4k to get moving.
 
Race Cam.
See if 8.0 dynamic can be done.
Have Race grinds in mind by Crower.
Isky.
Comp Hi Tech Drag Race.
Circle Track Race.
 
Grumpy said:
Rick theres some, or several factors in that software thats not working correctly,
the combo should have zero problem reaching 500 ft lbs and 550 hp plus
Ive built too many engines to see and expect less with that combo
Click to expand...
Like I mentioned, I suspect that DynoSim5 does not know how to handle a camshafts with asymmetrical
lobes. If I change the ICL, it changes the valve timing and vice versa, I cannot make all the numbers match
the Crane cam card.

Can you tell if the lobes are asymmetrical?
 
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