Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Stock cam in a worked 304?

MR.HG

Donating Member
Joined
Dec 12, 2010
Messages
177
Reaction score
12
Points
18
Location
Brisbane
Members Ride
HG Brougham, VS Ute, VR SS
It seems I have wiped an exhaust lobe, cylinder 2 on my crow 286 cam. I have worked 59cc heads with 130lb springs, big pacies into 3 inch x pipe (2.5 inch dual over the diff) , 25lb bluetop injectors, port matched bananas, soon to have installed flat top pistons (about 10:1 compression) lightened flywheel hd clutch bw t5.
My question is..... do you think the stock cam will still perform well? I have the motor out doing rear main seal, rings and bearings and the wiped lobe is making me lose sleep. I dont have the coin to replace the cam however the stock one I removed is still in good condition.

Thoughts?
 

EYY

Well-Known Member
Joined
Mar 6, 2011
Messages
5,412
Reaction score
1,465
Points
113
Location
Vic
Members Ride
VS Statesman
Too much comp for a stock cam in a cast iron engine. 9.5 comp would be absolute max for stock cam on 95 with a decent tune I’d say. I wouldn’t chance putting a second hand cam back in either. Better off spending the $400 and doing it properly otherwise it’ll cost you more in the long run if it pings and does damage
 

MR.HG

Donating Member
Joined
Dec 12, 2010
Messages
177
Reaction score
12
Points
18
Location
Brisbane
Members Ride
HG Brougham, VS Ute, VR SS
Given the specs listed above, do you have a grind in mind? Looks like another month off the road. I dont really want to pull the inner springs back out for break in either so maybe I should go solid?
 

EYY

Well-Known Member
Joined
Mar 6, 2011
Messages
5,412
Reaction score
1,465
Points
113
Location
Vic
Members Ride
VS Statesman
Go the camtech version of the 286 if you want something similar again.

Don’t really need double springs with a hydraulic like that - and excessive spring pressure may have contributed to the camshaft damage.

Do the break properly and you won’t have any dramas. Seems pretty rare these days to wipe a lobe if the installation and run in are done properly
 

Deuce

Super Stock
Joined
Feb 5, 2012
Messages
3,037
Reaction score
1,840
Points
113
Location
Snobs Rock (or so the locals say)
Members Ride
'94 VR SS V8
What is intake close deg @50? That will determine if the came is too short to run in a 10:1 combo.
Still not the best plan, but if you have to run it then it's best to check first (before it pings its head off)
 

gtrboyy

Well-Known Member
Joined
Jan 25, 2006
Messages
3,153
Reaction score
1,514
Points
113
Members Ride
vt ss & lc gtr
Stock cam won't save you coin if it still needs a retune & want to ping due to other mods listed so may as well do it all now instead of again later on.

I'd actually prefer smaller 284 if staying with banana manifold...more comp,better intake than 286 or similar solid will be nice.

Don't forget shorter diff gears.
 

MR.HG

Donating Member
Joined
Dec 12, 2010
Messages
177
Reaction score
12
Points
18
Location
Brisbane
Members Ride
HG Brougham, VS Ute, VR SS
Thanks guys for your input. I've decided to go with a 280 (crow 603) has even lift and duration with 110 deg separation.
 

MR.HG

Donating Member
Joined
Dec 12, 2010
Messages
177
Reaction score
12
Points
18
Location
Brisbane
Members Ride
HG Brougham, VS Ute, VR SS

EYY

Well-Known Member
Joined
Mar 6, 2011
Messages
5,412
Reaction score
1,465
Points
113
Location
Vic
Members Ride
VS Statesman
Top