Topic: Crane Camshaft for cb750 - anyone ever run one?

[PeWe]

Note the recommended 5000 rpm minimum on the fat 400 unit

No sh!t......the valves never close. I wouldn't recommend that thing for the street (unless you start off with a ton of static compression).

min 5000 rpm, must be idle! Or when engine runs stable
for the strip, must be impossible to ride that cam on the streets.

[BPellerine]

salt flats maybe?bill

[dragracer]

Definitely a  cam for high rpm use only. The valve springs would need to be replaced quite often because they'd get beat to hell during every run.

[PeWe]

Win the race, it cost a few engines that sponsors gladly can provide when their visible names sells products. I understand that formula.

It would be nice with a chart where different cams are runned in same engine on dyno.
Different displacements and CR too.
To visualise the extra hp and torque the added amount of pain on engine and wallet will give except for less durability.

[corky]

Hey BPellerine,

i actually found the cam card for that crane cam you have.  Here it is.  Sorry for the late reply.

Thanks,
Daniel

[BPellerine]

thanks ,I never did know the specs on it,found in a stock motor,where the valves were just kissing the pistons.bill

[PeWe]

They made a lot of different cams for the CB750.
A very popular bike!

[Tracksnblades1]

thanks ,I never did know the specs on it,found in a stock motor,where the valves were just kissing the pistons.bill

Did you get to hear it run...?    🙏

[BPellerine]

no never heard it run,motor was apart.bill

[Tracksnblades1]

no never heard it run,motor was apart.bill

😩

That's to bad....

Once tore down a 350sbc, everything wrong by the accepted rule...
Big Crane .670 intake .625 exhaust...286@ .050 lift,  roller...1.5:1 crane roll rocks with double bar girdle
Stock cast iron Qjet intake with adapter to square 850 Holley DP...
Stock 8.5 cast pistons........
Stock 1.74 intake 1.50 exhaust 78cc cast iron heads bowl ported below valves w/ screw in studs and big 1.437 or 1.500 valve springs....
Unmatched header adaptors to Schoenfield 1 3/4 headers.....
Variable pitch stock th400 converter with manual body th400...

Ran like a screaming chicken....idled very decent @ 900....power brakes worked at stop sign...
Smoke the 3.73 posi street 60's anywhere anytime....
Still have the Crane Cam #...and still offered......

Do you want to sell it....?

[BPellerine]

don"t think I would sell it to anyone,looks to be some wear,might be ok might not be.bill