Cam card info

[Knight rider]

Where does 1 find camshaft specs other than the usual @50, max lift, LSA etc

I'm trying to compare cams but can't seem to find opening and closing info or ramp rates etc is this become a secret now, compcams used to have more info on there site but not now. I'm mainly looking a lunatic and Howard cams at the moment cheers

[Knight rider]

Maybe I should let you guys pick me a cam- this is what I'm looking at
Engjne 393 Cleveland
Heads 3v 235cc flow 280@600
11.5-1 comp
4-1 Pacemaker 1 3/4 headers
3.89 diff
Stall TC 3000 to 3500rpm still working on the auto
Custom intake
Holley terminator EFI

ZG Fairlane 3500lbs
Street/strip


https://www.howardscams.com/hydraulic-r ... -230335-10

https://www.lunatipower.com/voodoo-retr ... 2-300.html

This is what I have now

https://www.compcams.com/magnum-245-245 ... ductattach

[GARY C]

Comp's new site sucks... Here is there lobe catalog if that helps.
https://www.carid.com/images/comp-cams/ ... atalog.pdf

[CamKing]

What RPM do you want to make peak HP at ?

[Racer71]

I had a 396 solid roller motor but trick flows I’ll see if I still have the cam card might get you some ideas, shop that did my machine work specced it out. It was pretty big lift iirc.

[Knight rider]

Thanks for the replys so far.
Max hp rpm 6000 but I can shift at 6500 or so but from what I've seen its actually faster or as fast to shift earlier.

What I'm thinking I'd like is a cam with less overlap but with the same lift or a little more, I did find the specs on the compcam I have
Exh closes 38atdc intake opens 48btdc

Exh opens 86bbdc intake closes 78abdc
244@50 and valve lift 612

In my mind I'm thinking I'd see more benifits from delaying the intaking opening and maybe increasing the intake closing with the intake manifold I have which has straight tall runners ? More ram effect ? Cheers

And yes compcams new site is far from ideal

[CamKing]

Here's what I recommend.
Cam# F351c, HR74365-75365-110
288/292 @.006"
242/246 @.050"
.365"/.365" Lobe Lift
110 LSA
107 ICL

[Knight rider]

Here's what I recommend.
Cam# F351c, HR74365-75365-110
288/292 @.006"
242/246 @.050"
.365"/.365" Lobe Lift
110 LSA
107 ICL

Thanks appreciate it, is that one of your cams ? A Custom grind or OTS cam cheers

[CamKing]

That's one of our custom grinds.

[Knight rider]

That's one of our custom grinds.

Thanks, don't know how I'd go getting one of yours being Down under and also the time frame it might take, but i'll think about the options would be nice to have a custom cam cheers

Is there options to have one of my cam's I ready have reground over here to your specs - happy to pay for the service just don't know if that's a done thing ?

[CamKing]

Just see if you can find a cam as close to my specs as possible.
We ship cams to Australia all the time, but it's expensive.

Check with SCM Engine Development in Ballarat, and see if they have something close.

[Knight rider]

Just see if you can find a cam as close to my specs as possible.
We ship cams to Australia all the time, but it's expensive.

Check with SCM Engine Development in Ballarat, and see if they have something close.

Thanks so yours has more duration on the exh ? Cheers

Edit
So is this correct for your specs cheers

[CamKing]

Thanks so yours has more duration on the exh ? Cheers

Edit
So is this correct for your specs cheers

No. Those opening and closing numbers are for a cam that's 242 on the intake, and 288 on the exhaust.
It looks like you used the .050" intake duration for the intake numbers, and the .006" Intake duration for the exhaust numbers.

Here's the opening and closing numbers for my cam.
At .050" Lobe Lift
IVO: 14 BTDC
IVC: 48 ABC
EVO: 56 BBC
EVC: 10 ATDC
Overlap = 24

At .006" Lobe Lift
IVO: 37 BTDC
IVC: 71 ABC
EVO: 79 BBC
EVC: 33 ATDC
Overlap = 70

[Knight rider]

Thanks so yours has more duration on the exh ? Cheers

Edit
So is this correct for your specs cheers

No. Those opening and closing numbers are for a cam that's 242 on the intake, and 288 on the exhaust.
It looks like you used the .050" intake duration for the intake numbers, and the .006" Intake duration for the exhaust numbers.

Here's the opening and closing numbers for my cam.
At .050" Lobe Lift
IVO: 14 BTDC
IVC: 48 ABC
EVO: 56 BBC
EVC: 10 ATDC
Overlap = 24

At .006" Lobe Lift
IVO: 37 BTDC
IVC: 71 ABC
EVO: 79 BBC
EVC: 33 ATDC
Overlap = 70

Thanks for info great stuff cheers

[David Redszus]

Thanks so yours has more duration on the exh ? Cheers

Edit
So is this correct for your specs cheers

No. Those opening and closing numbers are for a cam that's 242 on the intake, and 288 on the exhaust.
It looks like you used the .050" intake duration for the intake numbers, and the .006" Intake duration for the exhaust numbers.

Here's the opening and closing numbers for my cam.
At .050" Lobe Lift
IVO: 14 BTDC
IVC: 48 ABC
EVO: 56 BBC
EVC: 10 ATDC
Overlap = 24

At .006" Lobe Lift
IVO: 37 BTDC
IVC: 71 ABC
EVO: 79 BBC
EVC: 33 ATDC
Overlap = 70

Mike,
Do you factor in valve diameter into the lift determination?