Stock Cam recommendation

[Sonny]

I’m looking to install a new cam and roller lifters. I want a cam similar to what would have come in a hp 440. Don’t want a wild rough idle cam, looking for smooth idle and 17-21” vacuum for power brakes and stock power. thanks

 

[turbine68rt]

I used a Comp 21-305-4 but with hydraulic flat tappets. Maybe you could contact them to see what the roller equivalent would be.

 

[PRHeads]

I doubt you’ll find what you’re looking for in a catalog.
You’ll likely have to have one ground for you....... if you can find a supplier that has a suitable core/blank for the application.

For the criteria you’ve outlined, keep the duration modest and the lsa kinda wide.

Edit- I take that back.
The Howard’s 723515-12 would fill that criteria(well...... it would have a “smooth-ish” idle).

A related discussion:
https://www.forbbodiesonly.com/moparforum/threads/cam-question-for-67-gtx.238943/

 

[zyzzyx]

Why roller on such a docile grind? Wasting alot of money!

 

[Sonny]

Why roller on such a docile grind? Wasting alot of money!

I just wiped a flat tappet cam lobe and lifter and have to rebuild my low mile motor. I’m done with them.

 

[Lefty71]

just wiped a flat tappet cam lobe and lifter and have to rebuild

More detail about what happened and who's parts you were using may save a lot of grief after the new cam goes in.
Have the cam bearing's alignment been checked since the failure?? Was everything oiling properly all the way up??

***EDIT** I missed the part where we are talking damaged HYDRAULIC lifter. I thought the OP had said mechanical,,,my bad.

 

[zyzzyx]

I've been listening to all kinds of stories on both sides of the fence and wonder what I'm missing?
They still make flat tappet cams & lifters. They make rollers too, but they are more mechanically
complex and are more prone to fail/more parts/heavier. So, to make things a little more slippery
is not doable? Everyone please explain. Valvoline VR1 and some ZDDP won't do it?

 

[Nate S]

I've been listening to all kinds of stories on both sides of the fence and wonder what I'm missing?
They still make flat tappet cams & lifters. They make rollers too, but they are more mechanically
complex and are more prone to fail/more parts/heavier. So, to make things a little more slippery
is not doable? Everyone please explain. Valvoline VR1 and some ZDDP won't do it?

Now you’ve done it. You’ll hear all about the quality of today’s lifters and cam blanks, then about ZDDP, then various analysis of what the OP did wrong etc. most of this stuff is at least partially true, (possibly not including the OP mistake part).
Sometimes the materials seem suspect, haven’t seen any testing but it’s certainly a common sentiment. Most people figured out the ZDDP thing 15 years ago but it does still trip people up. Plenty of people are successful with flat tappet cams even today. Gotta say though, if I was the OP I’d be bullshit and looking at roller cams too!

 

[1 Wild R/T]

Just like every "improvement" you make, you'll eliminate some problem & create other problems....
Fuel pump pushrod will still but a sliding contact, What is the current best option to solve that? The brass tipped pushrods get eaten up pretty quick, Chevy cams are offered with a fuel pump eccentric made of different material that eliminates the problem, last I heard no such fix for Mopar...
Distributor/oil put drive gear, theres great stuff out there these days if your building a Chevy... But last I check Mopars were still having problems... If you drive 500 miles a year & like working on your engine more that you drive it great but for those of us who prefer to drive allot have the problems been addressed for Mopar as much as they have for Chevys?

 

[Sonny]

More detail about what happened and who's parts you were using may save a lot of grief after the new cam goes in.
Have the cam bearing's alignment been checked since the failure?? Was everything oiling properly all the way up??

Check my other post “possible blown head gasket” from the other day.

 

[Sonny]

So it sounds like this conversion requires new:
Push rods
Oil pump drive gear
Adjustable rockers?
Mods to my 452 heads?
Valve springs
Cam and lifters
Timing chain and stiffer cover
Button
Jesus. Maybe zyzzyx is right? Stock hyd flat tappet cam and don’t use comp cams again.

 

[Tman100]

I’ve always run flat tappet cams. I have heard that lately the comp cams lifters are suspect not the cams themselves. I’ve the last 15 years I’ve been running lunati cams and had excellent luck with their Voodoo cams. I’ve put these into stock engines with massive luck. The smaller Vodoo like;
Voodoo Hydraulic Flat Tappet - Chrysler 361-440 253/258
works really well ina stock 440 without having to do any head mods. Just need to change your valve springs. If you have a lower compression engine I really like this cam. If you have 10:1 and you cut your guides down to accommodate more lift then I’d choose a bigger cam then this one…. Just my 2 cents.

 

[WileE]

My current flat-tappet engine I rebuilt over 10 years ago... fine. Check with the guys at Hughes engines, they'll set you up. Have great experience with them A+

 

[Sonny]

I’ve always run flat tappet cams. I have heard that lately the comp cams lifters are suspect not the cams themselves. I’ve the last 15 years I’ve been running lunati cams and had excellent luck with their Voodoo cams. I’ve put these into stock engines with massive luck. The smaller Vodoo like;
Voodoo Hydraulic Flat Tappet - Chrysler 361-440 253/258
works really well ina stock 440 without having to do any head mods. Just need to change your valve springs. If you have a lower compression engine I really like this cam. If you have 10:1 and you cut your guides down to accommodate more lift then I’d choose a bigger cam then this one…. Just my 2 cents.

Thanks my engine has 9:1 compression with kb pistons. I’ll check them out!!

 

[F4R/T]

Call Bob K., aka Mr. Six Pack and buy one of his cams.. A wealth of knowledge and very friendly.. One heck of nice guy he also builds engines too! He was / is Tom Hoover and his sons good friend and neighbor.. A true legend. Just a cool guy!

 

[1 Wild R/T]

A suggestion, if your gonna run a flat tappet consider running lifters that oil the lifter face and cam lobe....

Running solids most smart guys these days run lifters with an .005 oil bleed hole burned through the lifter face, the process is done by Electrical discharge machining (EDM) Unfortunately that's not an option on Hydraulic lifters..

Crower cam saver lifters are a variation of the EDM solid lifter... You can't have a EDM hole on a hydraulic lifter, it would bleed down and the valve train would make lots of noise....

So instead Crower cuts a .002 groove in the outside of the lifter from the oil ring down to the lifter face..

For some reason Summit doesn't list them for Mopar, but Jegs does...

https://www.jegs.com/i/Crower/258/6...wv872bGi-tlYNVk1GnZ2dh5-94k0f1shoC8NcQAvD_BwE

If your a Summit only guy call & ask, I'm sure they have access to them, they sell the Cam Savers for Chevy & Ford... Not Mopar...

 

[Challenger340]

I will be Testing the following on the Engine Dyno pretty soon....

I will be using the SUMMIT 6401 Hydraulic Flat Tappet Cam ($92.)
used with
Sealed Power HT976-16 Hydraulic Flat Tappet Lifters ($110.)
installed in....
a pretty basic resto style .030 over 440 targeting 5,000-5,200 rpm

* ICON 9953 Pistons, 5/64" 5/64" 3/16" Rings
* 906 Heads(ours end up around 90+ CC's when finished), and we use 8519PT Head Gaskets.
* HP Exh Manifolds and Factory 1968/69 Cast Iron Intake.

The SUMMIT 6401 Cam is ground on a 115* lsa which should provide a very good Idle/Vacuum characteristic even with the 224* @ .050 Intake Pattern.... and I expect nothing more than a very light 'musclecar' style Exhaust note.

But the real kicker....
I can't see the reason for any more than 290'ish 'over the nose' V/Spring pressures on this Cam for easy break in ?


Any bets how much power/trq we'll see ?
I think we can get close to 420 hp with 510 Ft/lbs with our iron head 2.08" valve prep/angles/bowls

 

[PRHeads]

I’d be curious to know what part number cam the OP was using that he had the problem with?

 

[Sonny]

I’d be curious to know what part number cam the OP was using that he had the problem with?

 

[PRHeads]

Fast rate hyd cam........ not really my favorite..........But that’s what sells.

Although that’s not a real big one.