292 comp cam

[CamKing]

Better mileage...that is an important part of todays mild builds for me..And longevity.

One we use a lot on SBC 350's for milage is our 204/208@.050" with .443"/449 Lift.
It'll make 350hp @5,200rpm, and we use a spring with 115# on the seat, and 280@ max lift.

What LSA? Just curious.

What kind of flow numbers and compression are you using to get 350hp? I'd love to hear more details on the combo.

Between a 110 and 112 LSA
9-9.5:1 compression
Intake port : 240cfm
Exhaust port: 175cfm

[levisnteeshirt]

I can recall Hot Rod Magazine pusblishing a 355 ci engine combo that used 882 heads, flat-top pistons, 2101 intake and a Comp 292H cam way back around 1988. A whopping 300-325 hp combo, with poor vacuum and drivability. Ugh! The dark days of performance....

John Ligenfelter back then did a 383 with the 305 magnum cam , with crap for heads , and got 425 ,,, the 292 cam will need a converter to shine , they'll never do as good as a small cam without a converter ,,,

there was plenty of fast cars back then , i assure you

most likely ,a 355 , with those heads , with a flat top , i doubt they set the deck clearence , would be lucky to have 9.0-1 compression

people use CI to get power now , back then it was RPM and a nice big gear

[novadude]

I can recall Hot Rod Magazine pusblishing a 355 ci engine combo that used 882 heads, flat-top pistons, 2101 intake and a Comp 292H cam way back around 1988. A whopping 300-325 hp combo, with poor vacuum and drivability. Ugh! The dark days of performance....

John Ligenfelter back then did a 383 with the 305 magnum cam , with crap for heads , and got 425 ,,, the 292 cam will need a converter to shine , they'll never do as good as a small cam without a converter ,,,

there was plenty of fast cars back then , i assure you

most likely ,a 355 , with those heads , with a flat top , i doubt they set the deck clearence , would be lucky to have 9.0-1 compression

people use CI to get power now , back then it was RPM and a nice big gear

There were fast cars back then, no question. I can recall doing some street racing in the early 1990s, and the really FAST guys were running 11's - If you ran 12's, you really had a strong runner. 12s isn't much to brag about these days.

A 425hp 383 built with more modern parts will make better vacuum, get better mpg, and all-around be more "street freiendly". a 425hp 383 with a monster 305H cam is hardly an efficient combo in today's terms.

[levisnteeshirt]

eh , prolly true ,, but with smog heads , it did a decent number ,

i just sold a set of small dome pistons i had , for a 327 ,, he was scared they would need race gas , with the dome it still had just around 10.7-1 , so a flat top in a 355 with 76 cc heads , would be dead with a 292 cam

it takes more than throwing a cam in something to get it to work , first thing too big kills it , when its a 355 street motor

[Amilcar]

Not want to hijack the thread....
I`d like a help from Mike(camking) or someone else who already had this checked.
I´m refreshing a SBF302 that has the old crane HMV-272/284@.004 216/228@.050 .484/.512 lift. 112LSA
The engine will work with an Performer intake, lightly ported heads and headers for a daily driver Galaxie 3 speed stick with 3.54 gears. The goal is to keep the RPM`s under 5500/5600 so I decided to look for a little faster lobe action.
Whas thinking on the XE262 or Lunati Voodoo series but to honest, I`m not sure how faster than the currently crane they are. I´m about taking the time to check the this Crane and a XE268(have here for another engine) with a degree wheel to compare both. Will I waste my time or they´re really far different?
Would like to hear an option from you too Mike.

[CamKing]

Not want to hijack the thread....
I`d like a help from Mike(camking) or someone else who already had this checked.
I´m refreshing a SBF302 that has the old crane HMV-272/284@.004 216/228@.050 .484/.512 lift. 112LSA
The engine will work with an Performer intake, lightly ported heads and headers for a daily driver Galaxie 3 speed stick with 3.54 gears. The goal is to keep the RPM`s under 5500/5600 so I decided to look for a little faster lobe action.
Whas thinking on the XE262 or Lunati Voodoo series but to honest, I`m not sure how faster than the currently crane they are. I´m about taking the time to check the this Crane and a XE268(have here for another engine) with a degree wheel to compare both. Will I waste my time or they´re really far different?
Would like to hear an option from you too Mike.

I'd go with the Lunati 250/256 VooDoo cam

[F-BIRD'88]

The Crane 272/284 cam will check approx 264/276 @.006" .Now you can make a valid comparision.

The HMV series of cams are a fast action Hyd cam design . But quiet at idle. They are more agreessive than the numbers seem to show.

If you are looking for more low rpm torque and daily driver fuel efficiency try a new cam with less .050" duration, regardless of Brand.
EG: Crane 363501 (Z-256-2) or 363901 (H260-2) Little 302's are very easy to over cam.

The XE262H-10 would actually be a bigger cam than the one you got now.
the XE268H-10 is a good bit bigger.
Your 302 will want aggressive rpm, gears (4.10's++) and compression for this cam.

If you have the time check it at .004" lifter rise to compare to a Crane hyd cam of equal duration @.050".

The advertised durations are at different checking heights .004" vs .006".

[Orr89rocz]

One we use a lot on SBC 350's for milage is our 204/208@.050" with .443"/449 Lift.
It'll make 350hp @5,200rpm, and we use a spring with 115# on the seat, and 280@ max lift.

What LSA? Just curious.

What kind of flow numbers and compression are you using to get 350hp? I'd love to hear more details on the combo.

Between a 110 and 112 LSA
9-9.5:1 compression
Intake port : 240cfm
Exhaust port: 175cfm

Nice little cam! A good stock replacement cam for a 305-350 TPI motor perhaps? Can you get it in hyd roller? I made 254whp on stock L98 with just bolt ons and intake manifold swap, still EFI. Ran very lean tho so probably had 260's maybe 270 in it. Not to shabby for a 207/213 .415/.430" 117 or so lsa cam and heads that flow 190s cfm. Tad bit of port work and you'd never know a cam was in it but it would make near 300whp

[CamKing]

Nice little cam! A good stock replacement cam for a 305-350 TPI motor perhaps? Can you get it in hyd roller?

The HR version is 208/212@.050", and either a .469"/.465" lift or a .490"/.465" lift.

[cv67]

Remember the 280 cams...ran an old SSI regrind from PAW. In a 11:1 327 it ran pretty good.
The Isky mega 280 was an all time favorite way back then loved the way it ran..

Wonder what the 280....and that old 292 cam would do with a modern pair of cyl heads on it?
Would befun to see the difference. Id bet 80 hp but what do I know. The Isky 505 for a HFT cam ran real well too but you really needed some gear and a light car to make it work.

Wish the SFT cams didnt have the wear issues today. Would be half tempted to take a power loss if it meant never having to worry about a lifter wheel failing.

[Amilcar]

Not want to hijack the thread....
I`d like a help from Mike(camking) or someone else who already had this checked.
I´m refreshing a SBF302 that has the old crane HMV-272/284@.004 216/228@.050 .484/.512 lift. 112LSA
The engine will work with an Performer intake, lightly ported heads and headers for a daily driver Galaxie 3 speed stick with 3.54 gears. The goal is to keep the RPM`s under 5500/5600 so I decided to look for a little faster lobe action.
Whas thinking on the XE262 or Lunati Voodoo series but to honest, I`m not sure how faster than the currently crane they are. I´m about taking the time to check the this Crane and a XE268(have here for another engine) with a degree wheel to compare both. Will I waste my time or they´re really far different?
Would like to hear an option from you too Mike.

I'd go with the Lunati 250/256 VooDoo cam

Thanks Mike,

I see now the VooDoo series for SBF is only avaliable in 351W firing order, which I see no problem. I`m sorry if it wasn´t clear but, i wish i could get a little bit more power with a possible faster lobe without decrease down low. That 250/256 you mentioned, is a way smaller than the current one(207/213-.466-.483-112LSA). Sure it will be better at lower rpms but is this that "fatter" that will outperform the Crane at 5400/5500rpm ? I see there the next one is 213/219-.483/.499-112LSA which appear pretty closer.

[Amilcar]

The Crane 272/284 cam will check approx 264/276 @.006" .Now you can make a valid comparision.

The HMV series of cams are a fast action Hyd cam design . But quiet at idle. They are more agreessive than the numbers seem to show.

If you are looking for more low rpm torque and daily driver fuel efficiency try a new cam with less .050" duration, regardless of Brand.
EG: Crane 363501 (Z-256-2) or 363901 (H260-2) Little 302's are very easy to over cam.

The XE262H-10 would actually be a bigger cam than the one you got now.
the XE268H-10 is a good bit bigger.
Your 302 will want aggressive rpm, gears (4.10's++) and compression for this cam.

If you have the time check it at .004" lifter rise to compare to a Crane hyd cam of equal duration @.050".



The advertised durations are at different checking heights .004" vs .006".

Thanks F-BIRD"88"

That´s why I asked around here, looking only by # of degrees and lift, it`s hard to say how much these XE or VooDoo series are faster than the HMV(if they are).
I aware this 262H-10 is a bit bigger than the Crane(plus they are 110LSA) and I would only measure the XE268H-10 for the purpose to get a way to see it`s lobe shape. Sure this 268 wont be used in this aplication.
The gas around here has about 20% alcohol, so running 10:1 is not a problem.

[F-BIRD'88]

The gas around here has about 20% alcohol, so running 10:1 is not a problem.
then I would raise the compression ratio of the motor.
Shave the heads, deck the block, thinner had gaskets.
The Crane cam you got can well use a 10:1 cr ++ with good gas.
As long as the local fuel will support it:
Compression is your friend. All the more critical on a small CID motor with a cam.

All these cams are variations of a common design theme . asymmetrical lobe.
If you were to paper plot the lobe lift curves and lay them on top of one another you would see they are actually more a like then different. Two of the cams you mentioned were designed by the same guy.
they all seem to work very well when applyed correctly.

You could plot the cams at .004, .006 .050" .100" .200" and .300" to full lift and get a idea of the lobe shape, area under the lift curve and the difference between the opening side and the closing side of the lobe.

I would not change the cam at all. A Galaxie is a big heavy car. If you want more go when you rug it ...Its really hurtin for some 4.30's.
Now the lil stick 302 will haul the freight around.

I would degree in the crane cam you got to verify the .050" timing events. It may need correction.

Changing the engine compression ratio and swapping the gears in your galaxie will make a ton more difference than a minor change in camshaft profile . Again that big heavy car is really hurtin for gears.

You'll have a whole different opinion on that motor's performance.

[levisnteeshirt]

these bloody chaps from england , liked their 292h cam so much , they posted a video of their dragster with one in it ,,, it sounds ok , , sounds pretty mild in this 383

http://www.youtube.com/watch?v=8cljM9jR ... e=g-user-u

http://www.youtube.com/watch?v=UD-l6mzI ... el&list=UL

[CamKing]

That 250/256 you mentioned, is a way smaller than the current one(207/213-.466-.483-112LSA). Sure it will be better at lower rpms but is this that "fatter" that will outperform the Crane at 5400/5500rpm ?

Yes, it'll make more power everywhere, from idle to past 5,500. That's why I suggested it. The 302 doesn't need much duration. I have a grind that's the size of the next bigger Lunati cam, but I think you're better off with that 250/256.