[roy381]

Hi folks. I have a 461 that I picked up for a great deal. previous owner ran it for about 6 months, he said it wipe out a HFT cam (COMP CAM XE284H) after few hundred miles. I'm going with a roller cam. Street car only no track.

let me preface that I have very limited knowledge of cam profiles. I am looking for good low end

67 gto
400 block
4.25 eagle crank
eagle H Beams
dished ross pistons to get to 9.2 compression
16 heads with mild port
1.65 rockers
th400- trans coming out for refresh also
3.23 rear
dougs headers to pypes 2 1/2 exhaust
66 tripower

Butler recommended these 2 cams and lifters

https://butlerperformance.com/i-3164...tegory:1272239

https://butlerperformance.com/i-3164...tegory:1272239

any input is much appreciated

[Steve C.]

SAME CAM EXCEPT THE LOBE SEPARATION ANGLE (LSA), NOTE THE EFFECTS OF CHANGING LOBE SEPERATION ANGLE ACCORDING TO COMP......

https://www.compcams.com/cam-timing-...paration-angle



.

[vertigto]

Not to beat a dead horse, but consider letting Tim Goolsby at Bullet/Ultradyne figure it out for you (662-893-8022 x102)...mucho Poncho experience.

[pastry_chef]

Originally Posted by roy381

https://butlerperformance.com/i-3164...tegory:1272239

https://butlerperformance.com/i-3164...tegory:1272239

any input is much appreciated

Are you limited on how much valve lift you can run?
If you have the clearance I'd suggest more valve lift than those offerings.


Target for 463 at 5300 RPM

[steve25]

First off you had better, if you don’t already know find out what is it about that motor that wiped out the cam. Like is it something with the way those heads are set up?

[roy381]

After talking to my builder he said the cam lobes looked ok he said the bearings were the problem , he thinks maybe the engine was build too tight. Everything else was fine lifters valves rockers pistons etc.

[66sprint6]

Curious as to the spec on the lobe separation. 112+4, or 114+4? What does that mean?

[Gary H]

The +4 is 4 degrees advance built in to the ICL. Example: 112+4 is 112 lobe separation angle (LSA), that theoretically would degree in at 108 intake center line.

[roy381]

Any thoughts on these cams would be greatly appreciated. Are these cams on the mild side with my setup?

Thanks again

[Steve C.]

I believe on the intake side it is Comp XE lobe 3315

Tappet duration 282
0.020 257
0.050 230
0.200 151
.3400 lobe lift

The exhaust lobe should be lobe 3316

They are custom in that Butler orders the cam with a wider 112 or 114 lobe separation rather than Comps typical 110.

As a comparison Dave Bisschop's revised "Stump Puller" uses Comp lobe 3194B on the intake side.

281
230
157
.3890 lobe lift
Ground with a 112 LSA. With 5 degrees advance ground in.

More aggressive with more .200 duration and more lobe lift.
His exhaust lobe is 3196B


.

[redhawk44]

I am currently in the process of a new cam. It was recommended to me from a member here he has used . 239/243 on 112 degree LSA. If your still searching for the right cam after I get done I will let you know what I think.
It is a Hyd. Roller from Lunati Voodoo, and it is special order

[Cliff R]

"They are custom in that Butler orders the cam with a wider 112 or 114 lobe separation rather than Comps typical 110."

They started offering those cams shortly after I had a brief discussion with them and sent them the dyno sheet below (first pic). Until then their typical "go-to" HR cam was either the XR276HR or the two larger XE offerings on 110LSA's.

One of my customers recently used this cam in a 455 build with unported #16's and dished pistons recently and made great power with it:

https://butlerperformance.com/i-2936...tegory:1272239

This is the cam I would use in a 455 build with small chamber heads, dished pistons (low to mid-9's for compression) and lower compression.......Cliff

[pastry_chef]

Originally Posted by Steve C.

They are custom in that Butler orders the cam with a wider 112 or 114 lobe separation rather than Comps typical 110.

From David Butler (speaks like a very honest man).

The cams actually came from customer requests for hyd roller versions of some of the popular factory cams. And we also expanded that into the flat tappets to give an option other than Melling.
Cam choice is subjective based on a given customer's expectations as well as specific to each engine combo. But the fact is there's always more than one cam choice that will work well in almost any engine.

[Cliff R]

You left out the part that they moved away from the XR-276HR cam on a 110LSA and started offering the 112 and 114LSA HR cams right after I had a discussion with them and sent the dyno chart above. Coincidentally one of their cams is EXACTLY the same one I dyno'd in a 455 Super Duty build and another one they offer is based on the Old Faithful clone ran against the XR-276HR, 236, 242, 114LSA.......FACT.

Coincidence or not it's a good move for the community. Folks are now making more power, better idle quality, improved street manners and not pounding all the rod bearings out of their engines right on the dyno.

Since you've made it your mission to follow me around on here and emailing folks that I deal with you might as well get the information right.

Maybe one day you'll actually do something like port a head or build an engine vs just having bad cases of diarrhea of the mouth......FWIW.

Anyhow, back to more important things that pissing around with trolls.

With the right cam one can take a set of unported heads, a little over 9 to 1 compression and make nearly 500hp and 600ft lbs torque with a pretty "basic" 455 build and you don't have to deal with rough idle, stinky exhaust and detonation on pump gas to do it..........

[kyle_blake]

If I may ask, without hijacking the thread, just curious if the cam mentioned above :

Butler/Comp SP Street Performance Billet Roller Cam (HR) 288/294, 236/242, .521/.540, 114 LS (Std Firing Order/ Std Journals)

Can one order that cam except in hydraulic flat tappet version? I guess one would have to call and ask to get it made that way, they don't sell it already available?

Wondering if this cam has been used in 400's with 10 or 11 : 1 compression or is really just suited for 455?

[Steve C.]

That hydraulic roller cam Butler features uses Comp lobes 3316 & 3317 except again they are custom in that Butler orders the cam with a wider 114 lobe separation.
Not a recommendation but for conversation here, on the intake side note Comp Magnum Hydraulic flat tappet lobe 5208 is somewhat similar.

286
236
148
.3270" lobe lift

As often typical the flat tappet lobe does not have the extra .200 duration and lobe lift. That said, a search of other flat tappet lobes might be 'closer'.
Same for an exhaust lobe. Once determined a custom cam can easily be ordered, from numerous sources.

Example, see page 2 here:
https://www.compcams.com/lobe-catalog


.

[Stan Weiss]

Originally Posted by kyle_blake

If I may ask, without hijacking the thread, just curious if the cam mentioned above :

Butler/Comp SP Street Performance Billet Roller Cam (HR) 288/294, 236/242, .521/.540, 114 LS (Std Firing Order/ Std Journals)

Can one order that cam except in hydraulic flat tappet version? I guess one would have to call and ask to get it made that way, they don't sell it already available?

Wondering if this cam has been used in 400's with 10 or 11 : 1 compression or is really just suited for 455?

Yes that valve lift profile could be made as a hydraulic flat tappet cam. But without having a Cam Dr file of those lobes and being able to look at the lifter velocity. One would not know if it would work with the Pontiac diameter hydraulic flat tappet lifter need a bigger diameter lifter.

Stan

[Cliff R]

"Butler/Comp SP Street Performance Billet Roller Cam (HR) 288/294, 236/242, .521/.540, 114 LS (Std Firing Order/ Std Journals)"

This is a smaller roller profile, at least if you compare it to the Old Faithful that SD sells. It wouldn't be hard to duplicate it's performance with a flat cam. If I were wanting one done I would look here:

https://www.bulletcams.com/Masters/u...nemasters.html

......Cliff

[Steve C.]

To somewhat align with Stan's comment, from Comp Cams... "With thousands of active lobes in the COMP library, the combinations are infinite for any given engine."

Here Comp XFI hydraulic flat tappet lobe 5088. To be 'closer' to the hydraulic roller lobe, more aggressive in the .200 duration and lobe lift. But as expected the seat duration is much shorter to do so. This with the .842 min diameter.

280
236
150
.3450"
0.518" lift.

.

[Half-Inch Stud]

SUM-2821 Flat HYD