Id like your input/thoughts

This must be a Blast from the past Crane Cam Grumpy Recalls using 1st Hand.
Crane & Isky were the 1st to use .050" timing events.
In conjunction with Smokey Yunick.
Mid 1970's.
 
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What is amazing is that over 100 % Volumetric efficiency was achieved.
And the Dynamic compression ratio is low enough to run on 87 pump octane gas.
A true daily driver street engine.

Impossible to do the same LS & Turbo power adder on 87 octane.

I don't think it can be done on 87 octane Pontiac 455.
Maybe 480 stroker.
But not likely for same cash outlay.
 
yes its a well known old school crane hydraulic roller cam, and one of the first ones I ever tried,
its decent if you have at least 500 cubic inch displacement, a light car and manual transmission, it really prefers 11:1 compression.
Ive seen it perform decently in 9.5:1 compression 572 bbc engines before,
so I figured you could use it in a similar build,
to kill off some lower rpm torque and make a manual trans car operate on pump gas.
it originally had a slightly different crane catalog part number but specs were the same
crane changed some part numbers in the 1970s
 
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yes its a well known old school crane hydraulic roller cam, and one of the first ones I ever tried,
its decent if you have at least 500 cubic inch displacement, a light car and manual transmission, it really prefers 11:1 compression.
Ive seen it perform decently in 9.5:1 compression 572 bbc engines before,
so I figured you could use it in a similar build,
to kill off some lower rpm torque and make a manual trans car operate on pump gas.
it originally had a slightly different crane catalog part number but specs were the same
crane changed some part numbers in the 1970s
I will have to save the Crane Cam Profile Part Number Grumpy.

That was Fun Yesterday.

Really are not many left that recall how these Big Block Chevys Run in stroker 496-540-572 Race Mode.
A Long Rod 454 Runs like a Bat out Hell on Fire too with A Big Shot of Nitrous.
I Passed Frankie with his 1969 National Wheel standing Camaro 454 Long Rod.
Not really fair because we were all cruising.
About 40 cars.
I was all the way in the back with my 70 TA.
I told them all what I was going to do.
I passed all.
Going by Frank & he was on it All motor.
I blew By him.
'Up Front Leading.
 
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I had one guy send me a personal note saying he was rather impressed with this thread, but asking," what
I WOULD HAVE SUGGESTED IF THE CAR WAS A WEEKEND TOY AND THE ENGINE WAS TWEAKED TO PROVIDE NOTICEABLY MORE POWER?"

as a reference, heres what was suggested originally

well the first thing you want to do is understand power increases basically are the result of , more efficient use of the fuel/air mix being compressed and burnt at a higher average rpm,
or increasing the volume of fuel/air mix being burnt and compressed, in those cylinders, and under higher compression, with more efficient cylinder scavenging.
if your going to switch to higher octane fuel, you can do a bit of research and youll find that you see a rather consistent boost in torque from increased compression,

if you do some research youll find theres a rather consistent power increase as the compression ratio is increased (as long as you can stay well below the detonation threshold)
up to about 13.5:1 compression, with race octane gas as a fuel, change the fuel to 85% ethanol alcohol, or methanol and a bit higher compression can be beneficial, but I'll suggest strait race gas here too start off.
you can frequently see about a 2%-3% boost in torque for each step in boosted compression, or put a different way, jump the engines compression from 9.5:1-to 11.5:1 or two steps should result in about a 5% boost in power.
so if this is to be a racing engine ID change the compression to 13.5:1 rather that the pump gas friendly 9.3:1
crpower.gif

http://victorylibrary.com/brit/compression-c.htm

https://www.hotrod.com/articles/0311em-power-squeeze/

http://hpwizard.com/engine-horsepower-calculator.html

http://www.superchevy.com/how-to/en...ssion-increase-danger-mouse-part-twentythree/

http://www.wallaceracing.com/hp-cr-chg.php


a cam like a crower 01486 is a much better match to a 540 BBC with 13.5:1 compression.
theres several other changes required , but just those two would have pronounced effect on the engines power.


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At a glance the 13.5 to 1 static compression and Crower Cam should Put HP at 900 Grumpy.
DD200O when I get home.

The Torque power curve will be strong enough to twist and crack any GM frame.

Where I see modern turbocharged often better.


Drag race chassis needed.
 
The 540 with the Crower Cam & 13.5:1 static wants a Tunnel Ram Intake Manifold.
A Pair of Holley Dominators up on Top. 2400 CFM combined total.
946 HP at 7500 RPMs.

Sinlge plane Intake & 1150 cfm Dominator Power is about 850 Hp.

Exhaust system mufflers in place knocks down Peak HP 80-100 on all combos thus far.
Only a Corvette you can possible get away with Open Sidepipes all the time.

Pontiac V8 takes a big hit with Mufflers too.
Less than a BBC does.
 
I have to redo this engine simulation.
I skewed it up.

4 degrees advance ground in.
This is a High end street performance cam profile.
Very unusual for Crower.

Comp Cams is famous for that unless you go with the 305H. Full drag on the street.

Solid lifter cam. Subtracted lash prior.
 
remember its a solid roller cam,
and as a race engine it would run open headers,
yes a tunnel ram with dual quads would help
, but given a choice ID select a stack injection that flows about 2800 cfm-3300 cfm
Crower_Injectors.jpg
 
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remember its a solid roller cam,
and as a race engine it would run open headers,
yes a tunnel ram with dual quads would help
, but given a choice ID select a stack injection that flows about 2800 cfm
Crower_Injectors.jpg

I will try it Grumpy.
Getting tired.
3 hour roundtrip commute to work.
8 hr workday.
Been up since 4am.
 
2800 CFM total airflow is not enough Grumpy.
Stack injection..
2800/8= 350 cfm per cylinder.

Better for 496 ci BBC I think.

IT WANTS A BIG BO 2000+ CFM BO LAWS BLP RACING CARB.
I THINK.

SAVE AND POST WITH STACK INJECTION FOR YOU.
 
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