Comparing Mech To Hyd Cam Adv/.050” Durations

But that all changes around 6500 where a solid flat just runs away but my car is 90% Street and if I was building an engine for the strip solid would be the only way to go ( roller)

Howards list has most SFT cams .006 and .020 duration listed.

Kooser
you visited Howards
Do they use a NMC grinder instead of steel masters?
If so that's how they are able to offer so many profiles
just load the profile and the nmc grinder does all the work
accurate, fast, no human intervention to amount to anything
Most of you may know that Rick Jones "Controlled Induction" program can generate custom intake and exhaust, opening and closing sides lift files based on your unique requirements and build
back when we were lucky to get a lift table to 3-4 decimal places then rough it out resulting in a series of flats which were then smoothed with file then optics were used to reflect off the flats and the "master" touched up
some people still love these cams- (but they have been remastered for CNC)
Remember when Harvey Crane offered to "Computer smooth" competitors cams
I do not know if anyone took him up on it but it served to advertise his quality
Harold Berkshire used a 8 bit pre PC/ Apple computer to design his cams- much better than the HP35 we used
Then ISKY with his use of the IBM "Mainframe" a big step up in computer power
his Polydine cams with Poly the parrot-
Those using steel masters now can use a cnc grinder to utilize more numerical precision
so newer masters can be better than those done on a mill

OP What YR said above
your compression fixed
you know your head flows
so do what yR says to maximise your low end mid range get the seat duration set right to maximise the amount of dynamic compression your fuel can take
then use the .904 lifter to get the area under the curve and maximise your heads
you may have to do the low end- top end trade off which you do based on your gear drop of off the corner requirements or...
but you will be doing it at a higher level than you can possibly get with a .842 limitation
you can always lift limit if you have to due to spring or other
I do not like really pointy cams just to get a little more lift- they do not wear well
but if you are in a heads up class sometimes you have to do it and put up with the high maintenance

K.O. SWINGER said:

But that all changes around 6500 where a solid flat just runs away but my car is 90% Street and if I was building an engine for the strip solid would be the only way to go ( roller)

Click to expand...

No, again...a correctly sized solid lifter cam will KILL and hydraulic lifter cam at any RPM. Period.

Hydraulic lifters, like the powerglide, were developed for people who think your engine should be quite as a church mouse. Even the "modern" hydraulic lobes are noisy so you can't even claim the noise factor.

As we've become a more chucked nation, people thought lashing valves was a chore. Women didn't want to deal with it. It's along these lines that world respected sociologists spent millions of dollars to learn that by the early 1970's, women were making most do the car buying decisions. Sorry, just a FACT.

And to that FACT, car manufacturers decided to make the cars more "female" friendly. Automatic transmissions, lights and buzzers instead of gauges, vanity mirrors in the visors and glove box...**** like that and more. And the hydraulic lifter fits that category.

I'd you are building a performance engine, there is no reason to run a hydraulic lifter. Unless you don't want to lash the valves. To say you are using a hydraulic lifter because it makes more power is insane. And wrong.

what yr said
you are limited with a hyd because the all collapse, some more than others
but all more with a high rate cam - so camgrinders limit acceleration (there are race only hyd profiles where this is compensated for)
IMHO a proper solid will pick up throughout the rpm range
even given that I do not think that an .842 solid will run with a .904 hyd till you really rev it up
The newer tight lash solids are pretty stable lash wise
not so in the 60's when we had to set the lash after every run- that was in a not so sbc with stock rockers and the "400" degree cam
of course it was not 400 at usual lash- but we did do a major tighten to kill the low end for a top fuel and top gas win AHRA nationals

and then there's this;
I run my hydros with just .020 preload. I used to run .010
in both cases I still had to readjust them occasionally..... so.. WTH, I shouldda just run solids to start with. lol.
I bet, in the long haul, I may have adjusted my hydros nearly as often as I wouldda had to adjust solids. But the thing is, the hydros always tell me when it's time,lol.

Let me get this straight so what you're telling everyone is Chrysler Corporation dropped mechanical lifter camshaft in about 1967 in every high performance motor package available so women didn't have to adjust their lifters that's pretty funny, and furthermore there wasn't one solid lifter 350 Chevrolet that could get in front of my old piece of crap hydraulic 4-speed Speed Dart huge power Advantage LOL

K.O. SWINGER said:

Let me get this straight so what you're telling everyone is Chrysler Corporation dropped mechanical lifter camshaft in about 1967 in every high performance motor package available so women didn't have to adjust their lifters that's pretty funny, and furthermore there wasn't one solid lifter 350 Chevrolet that could get in front of my old piece of crap hydraulic 4-speed Speed Dart huge power Advantage LOL

Click to expand...

I tried to add some depth to the topic, because evidently, you weren't tracking well.

Your claim: a hydraulic lifter cam will out horsepower a solid lifter can until 6500 RPM and above.

My response: BULLSHIT.

Simple really. The rest I added to try and get you to change your incorrect thinking, so maybe you will stop publishing nonsense.

And yes, women mostly pick the cars they drive. That science has long been proven. Most men are cucks. To that end, we have more than just hydraulic lifters. We have idiot lights, seat belts, air bags, anti lock brakes and a whole host of junk no one who can drive really needs. Or better yet, we don't need the government telling us what we need.

For the rest of you, you have Uncle Sam to tell you how to live.

Again, a hydraulic lifter anything will never make more power than a solid lifter anything. Ever.

Doesn't mater how many times you say it.

That's my point.

If you want to say that the hydraulic lifter makes less noise, I'd let that slide. Until you get to a lobe worth having, then the hydraulics ain't so quiet.

If you want to say you can bolt the valve covers on and not take them off, I'd agree. Until the lifters make noise and you have to screw with them.

If you say I'm doing a dead stock deal, with stock rockers and I don't want to screw with it, and horsepower makes no never mind to you, then by all means, use a squish lifter.

Just don't say they make more power. They don't.

And Chrysler went to all hydraulic lifters because they can use a cheap assed stamped rocker. And the tolerance is so big, a blind man can put the heads together and have a 98.75% success rate.

But they don't make more horsepower.

Wyrmrider said:

Kooser
you visited Howards
Do they use a NMC grinder instead of steel masters?
If so that's how they are able to offer so many profiles
just load the profile and the nmc grinder does all the work
accurate, fast, no human intervention to amount to anything
Most of you may know that Rick Jones "Controlled Induction" program can generate custom intake and exhaust, opening and closing sides lift files based on your unique requirements and build
back when we were lucky to get a lift table to 3-4 decimal places then rough it out resulting in a series of flats which were then smoothed with file then optics were used to reflect off the flats and the "master" touched up
some people still love these cams- (but they have been remastered for CNC)
Remember when Harvey Crane offered to "Computer smooth" competitors cams
I do not know if anyone took him up on it but it served to advertise his quality
Harold Berkshire used a 8 bit pre PC/ Apple computer to design his cams- much better than the HP35 we used
Then ISKY with his use of the IBM "Mainframe" a big step up in computer power
his Polydine cams with Poly the parrot-
Those using steel masters now can use a cnc grinder to utilize more numerical precision
so newer masters can be better than those done on a mill

Click to expand...

Very interesting!