Cam Choice in a 396 - Chevelle Tech
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  #1  
Old Jan 16th, 08, 9:45 AM
onabudget onabudget is offline
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Rob
 
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Default Cam Choice in a 396

I'm working on Dom's (blue Chevelle on TC) 396. He forgot his password so I'll post the details for him.

Looking for a STREET cam for this stock 396 (specs below). Hydraulic or Solid. Car will see 95% street miles. Goal is lots of low end. Must be a stoplight to stoplight animal BUT must be able to handle some Highway trips... several hours at 70 MPH. Hydraulic is perferred but not opposed to a solid if it gives a better punch.

68 CE Replacement 396, Low Miles, stored over 25 years and recently ressurected. History unknown, but is running well with good compression, no oil consumption. Pings like mad on 93 with the small stock cam.

Heads are 1965 206's with shim gaskets. With those small chamber heads, the shims, and the small dome 396 piston...I'm guessing about 10-10.5 CR. The cranking compression is at 190-200 max.

Aluminum 180* Dual Plane Manifold
Holley 3310, 750 Carb
Electronic Ignition

Vehicle is a 72 'velle
TH400 with a 2200 Stall
10 Bolt BOP, gear will be changed to a 3.23
Rear tire is 255/60/15 which measures to about 27" Tall.

Looking fo a cam that can be swapped in without degreeing and will not have any piston-vlave clearance issues.

Thanks in Advance.
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  #2  
Old Jan 16th, 08, 10:01 AM
mr 4 speed mr 4 speed is offline
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Default Re: Cam Choice in a 396

Hi Rob,Years back,I had a very similar 396 that ran very,very well with the one of those Crane Energizers 228/228 @.050 .544/.544 112 LSA
It was in a 68 Camaro,2400 stall and had a 10 bolt posi w/3.08's
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  #3  
Old Jan 16th, 08, 10:37 AM
pdq67 pdq67 is offline
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Default Re: Cam Choice in a 396

For an about 10 to 1 CR'd engine...

I'd like to suggest either CC's 270S or their 282S solid lifter cams b/c they both will be darn good street engine cams.

270 more grunt, 280, more topend sorta deal is all..

And if you don't want to lash, then their 270 and 280 Magnum cams.

Note, nothing fancy at all here.

You want SOTA, then look into UDHarold's cams and the VooDoo line

pdq67
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  #4  
Old Jan 16th, 08, 10:41 AM
SWHEATON SWHEATON is offline
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Smile Re: Cam Choice in a 396

Not surprised at all that your stock 396/3225hp pings like hell on 93,that motor has very short camtiming resulting hi cyl pressures resulting in ping.

I had that same exact crane cam in my 396 for many yrs prior installed straight up/dot to dot and as Chris suggested it would be a very good inexpesive choice for a good perf cam.

My motor was a bone stock 396/325hp with stock 10;25:1 comp with m20 & 307 geared 12 bolt at the time and that cam alone really woke that motor up a lot.

The stock 396/325hp cam is somewhere like 198/198 deg dur @.05,.398/.398 lift on 114(?) deg lsa & the 396/350hp cam is 214/218 deg dur @.05,.461/.480 lift,114 or 115 deg lsa.

Now compair those stock gm cams to the crane cam (228/228 @.050 .544/.544 112 LSA)and you can see it's definately more agressive but not wild.

That cam had approx 13" vac at idle and when the motor just warm enouhg to come off the choke but not fully up to op temp yet it would idle kink ratty/souonded hot but after motor and oil was up to full op temp it would idle farily decent @850-900rpm in neutral with a slightly coppy but authoritative sound letting you know something was under the hood.

Run approx 18 deg inital/18 deg mech adv in dist in by 2800 with auto trans for 36 total.Also run a vac adv with approx 12-14 deg additional timing thats fully activated at idle for better idle,throttle resp,and fuel economy .

Thats the timing curve and vac adv setup i ran with that crane cam in my 396 and it didnt ping on 93 fuel.

But when i camed it down a smidge in recent rebuild to comp 222/224 deg dur @.05,.525/.525 lift,112 deg lsa with approx 9:8-10:0 comp thats when it would ping under WOT with 36 deg total,but under normal driving part throttle cond even with vac adv it would not ping.

But i guess reducing the dur @.05 by approx 6 deg was just enough to push the motor over the edge ceating a tad more cyl pressur being just enough to ping,i cut it a little to mild on cam. (DANG!!)

Motor runs great with that comp cam and i just run some kemco to allow me to still run the full ign timing curve.

Scott
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Last edited by SWHEATON; Jan 16th, 08 at 11:12 AM.
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  #5  
Old Jan 16th, 08, 10:47 AM
pdq67 pdq67 is offline
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Default Re: Cam Choice in a 396

OK!!

I have always liked this old Crane cam so how will it run??

Their old PowerMax H-278-2 spec'd at;

278/222/290/234, 114/109, .529"/.525" lift hy-cam.

Heck, can it be installed on 106???

pdq67
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  #6  
Old Jan 16th, 08, 10:52 AM
dreis454 dreis454 is offline
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Default Re: Cam Choice in a 396

Quote:
Originally Posted by pdq67 View Post
I'd like to suggest either CC's 270S or their 282S solid lifter cams b/c they both will be darn good street engine cams.

270 more grunt, 280, more topend sorta deal is all..

And if you don't want to lash, then their 270 and 280 Magnum cams.

Note, nothing fancy at all here.


pdq67
nope just out-dated old techology CC no quality controlled junk
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72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
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Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #7  
Old Jan 16th, 08, 10:56 AM
mr 4 speed mr 4 speed is offline
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Default Re: Cam Choice in a 396

Paul,thats funny you mentioned the 278 Powermax..that is the cam we removed when we put in the 228/228 grind...the combo liked the 228 @.050 cam better..back in day Crane called it the "Fireball 302H" and the Fireball 272H was the 216 @.050 .515 110 LSA
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  #8  
Old Jan 16th, 08, 10:56 AM
pdq67 pdq67 is offline
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Default Re: Cam Choice in a 396

DD,

That's funny b/c like I said, nothing fancy at all and I bet there's been a P/U load of these two cams ran in engines just like his through the years FINE!!!!

pdq67
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  #9  
Old Jan 16th, 08, 11:05 AM
dreis454 dreis454 is offline
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Default Re: Cam Choice in a 396

Quote:
Originally Posted by pdq67 View Post
DD,

That's funny b/c like I said, nothing fancy at all and I bet there's been a P/U load of these two cams ran in engines just like his through the years FINE!!!!

pdq67
how many engines have you run these cams in?

I can say that I've used both of them & after seeing how they ran vs the newer tech stuff & the quality of CC's latest stuff, I would not be suggesting those 'old' cams when there are much much better choices out there.
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #10  
Old Jan 16th, 08, 11:09 AM
BillsCamino BillsCamino is offline
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Default Re: Cam Choice in a 396

Rob,
I run a Lunati-Harold grind UHB-276-286 with 221/230 duration at .050, and .515" lift on 110 lsa in my otherwise stock 396/325 hp (402 actually after rebuild) in the wagon.
Stock iron intake, Q-jet carb and cast exhaust manifolds...runs great on 87 octane.
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  #11  
Old Jan 16th, 08, 11:13 AM
pdq67 pdq67 is offline
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Default Re: Cam Choice in a 396

I know there's better out there but still, all in all, they do fine imho..

That's all, and like I said, they are nothing fancy but they will still run fine.

And thank's Chris for the info.

pdq67
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  #12  
Old Jan 16th, 08, 11:41 AM
onabudget onabudget is offline
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Default Re: Cam Choice in a 396

Quote:
Originally Posted by dreis454 View Post
I can say that I've used both of them & after seeing how they ran vs the newer tech stuff & the quality of CC's latest stuff, I would not be suggesting those 'old' cams when there are much much better choices out there.
So what do you suggest... as far as 'the new stuff'
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  #13  
Old Jan 16th, 08, 11:46 AM
onabudget onabudget is offline
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Default Re: Cam Choice in a 396

Quote:
Originally Posted by BillsCamino View Post
Rob,
I run a Lunati-Harold grind UHB-276-286 with 221/230 duration at .050, and .515" lift on 110 lsa in my otherwise stock 396/325 hp (402 actually after rebuild) in the wagon.
Stock iron intake, Q-jet carb and cast exhaust manifolds...runs great on 87 octane.
Bill,
Are you still running the 'old' compression of the 396/325? Dom would love to run 87. How does it feel compared to the stock cammed 396?

He is already complaining about using 93, but he'll deal with it for the umph, but a nice low end feel and 87 he'll really be happy. All else considered if the Crane that Chris and Scott reccomend will give him more he'll definately open the wallet for 93 octaine.
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  #14  
Old Jan 16th, 08, 11:47 AM
dreis454 dreis454 is offline
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Default Re: Cam Choice in a 396

Quote:
Originally Posted by onabudget View Post
So what do you suggest... as far as 'the new stuff'
i'd go with the cam that you have in your car, the 60202 or the 60203
Crane does also have some similar choices in the 'powermax' line.

the cam that Bill is using also looks like a good choice.

the idea is........a split duration cam will work better for a street driven car in my experience, 'specially if it has ex. manifolds.
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #15  
Old Jan 16th, 08, 12:11 PM
68_RATPOISN 68_RATPOISN is offline
 
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Default Re: Cam Choice in a 396

What about the Lunati 60204 cam?
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