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-   -   "Old School" Stocker Cams (https://classracer.com/classforum/showthread.php?t=75027)

Alan Nyhus 01-02-2020 08:35 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by impstocker (Post 605226)
I am just going to be happy racing again! Will Lamprecht
G/H/I Stock 65 Impala 396/325

Now that's a racer! :) -Al

astikhossw 01-02-2020 12:25 PM

Re: "Old School" Stocker Cams
 
1 Attachment(s)
One is a stocker and they both have the same lift and duration.

Mike Jones 01-02-2020 01:31 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by astikhossw (Post 605246)
One is a stocker and they both have the same lift and duration.

Same duration?

impstocker 01-02-2020 03:33 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by astikhossw (Post 605246)
One is a stocker and they both have the same lift and duration.

OK..I think I get it now..the lift is the same..the duration being the same amount of degree's the valve is open as the stock cam..but with the square lobe the "dwell" time of the valve stays open is the big difference. ? right?

Is this a actual old stocker cam you show..another words those old cams had square lobes too?

The cam in my 396/325 is square lobe..but has more duration built into it, right?

Did they also change the LSA, lobe separation angle of the race cam compared to the stock cam too? More overlap for higher RPM?

Thanks for the lesson! I think it makes more sense to me.

Will Lamprecht
65 Imp...

Dwight Southerland 01-02-2020 03:58 PM

Re: "Old School" Stocker Cams
 
Maybe not more measured duration from open to close, but more "effective duration" due to opening the valve quicker and closing slower so that the valve is further off the seat for a longer period of time and thus allows more air to flow. "Area under the curve"

Terry Cain 01-02-2020 04:06 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Frank Castros (Post 604917)
Rollers for everyone! Cost effective and makes sense for everyone based on on the the current evolution on the rule book.

Hasn't been a flat tappet motor produced in 20 yrs or more but still the flat tappet racer wants to have a dis-advantage over the newer cars. SMH

Mark Yacavone 01-02-2020 09:01 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Dwight Southerland (Post 605274)
Maybe not more measured duration from open to close, but more "effective duration" due to opening the valve quicker and closing slower so that the valve is further off the seat for a longer period of time and thus allows more air to flow. "Area under the curve"

Right..and the duration specs were listed as .001 to .001 or less :-0
It's hard to compare those specs to .."@ .050, today, because that term was not part of the mix.

gmonde 01-02-2020 10:57 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by impstocker (Post 605226)
I started this thread just to learn what made a Stock "cheater cam" different than a factory cam using the same lift and duration..

I see it evolved into a discussion about roller cams in stock.

I am running the same 396/325 HP engine I ran in my 68 Impala back in 2003-2006, at that time the index was 12.50 in I/S which I ran. I would go 11.70-11.80's , 6 to 7 tenths under. I used stamp steel rocker arms which was the rule then. "Everybody" told me BBC always broke rocker arms..in over 100 passes with that motor never broke a rocker arm. I used Crane rocker arms, nothing special, not even "long slot" since I only have .398 lift.

"Everybody" also told me the car would be a parts breaker running a stick in a heavy car...(4095 lbs in I/S) I broke one set of gears, that was only because I used a set of street gears 4:88 at first, swapped to Pro gears, never had a problem after that.

Since then the index has been changed to a quicker 12.20..3 tenths quicker. Running the same motor in my 65 Impala now, do I think roller rockers, or lets say a roller cam, will make up that 3 tenths difference? I don't think so.. I decided to go back to running a stick too..same set up I had back in 2003-2006 I know I still left some ET on the table with my clutch settings and 60ft times.

So most probable you will see low valve covers with stamped steel rocker arms under them. I do have a set of "chinese" roller rockers I can use, but rather spend my $ right now getting rest of stick stuff I need..bellhousing, shifter, Z-bar, pedals ect. instead of a good set of roller rockers..plus need to get longer rocker studs for those. Plus I still will be using Shubeck "hydraulic" lifters..even though I guess I can use true solid lifters now. oh, I also need to buy a trailer too, just "refurbished" my 1977 Chev C30 to tow with, which I used back in 2003-2006

So I guess my point is you can allow me to use upgraded stuff like roller cams, but for now I will be showing up with a "old school" motor that instead of running 7 tenths under I should go 3 to 4 tenths under..another reason to run a stick. Less heads up then.

I am just going to be happy racing again!

Will Lamprecht
G/H/I Stock 65 Impala 396/325

Now that's what I call working on your stuff,,,,

doug schriener 01-03-2020 11:48 PM

Re: "Old School" Stocker Cams
 
Impstocker-you have a PM

jimi 01-04-2020 05:19 AM

Re: "Old School" Stocker Cams
 
I’m not opposed to roller cams in stock and some cars already have them, NHRA has given everything else like a super stocker in stock and in my opinion there is no hp advantage or durability advantage. I also have never had a single valve train problem with my Hemi. It’s not the roller lifter that allows the working rpm range it’s the cam profile.
New billet steel cam $1000 , proper flat tappet lifter for said cam $850 , new set of push rods $400 , about the same price as the roller. If I’m going to upgrade from a cast cam I’d prefer the roller( not that we can have it). I’d also like to eventually run my cam/car through the traps at 85-8600 not so sure we will ever get there with the flat tappet stuff.

20+ years ago I wrote a letter to Nhra asking for roller cams , roller rockers , better springs, aftermarket rods , aftermarket brakes etc... with my opinion why we should do it. I never got an answer but eventually everything except the roller cams has come to pass. I get it Billy And Todd both like the little of what’s left , the purity of stock racing but it has moved so far away who really gives a **** anymore? $3500 stainless headers $6500 transmissions, $5000 torque converters ? Some stocker engines are approaching $30000. not much STOCK anymore for a long time now! This argument has been going on since 1987 when the cam rules changed and it has not gone backward since.

Race Clean 01-04-2020 04:38 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Terry Cain (Post 605276)
Hasn't been a flat tappet motor produced in 20 yrs or more but still the flat tappet racer wants to have a dis-advantage over the newer cars. SMH

What is your reasoning, shouldn't engines come as produced in Stock?
It's the hp factors thats the problem!

Billy Nees 01-04-2020 04:51 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Terry Cain (Post 605276)
Hasn't been a flat tappet motor produced in 20 yrs or more

Going by that reasoning maybe we should have a "20 year rule" again in Stock Eliminator.
(does anybody on here even remember that?)

davidhuff 01-04-2020 05:25 PM

Re: "Old School" Stocker Cams
 
Sure was fun to read all this information from posts by real Class Racers!

Dave Noll 01-04-2020 06:25 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Billy Nees (Post 605459)
Going by that reasoning maybe we should have a "20 year rule" again in Stock Eliminator.
(does anybody on here even remember that?)

No. Please enlighten

older racer 01-04-2020 08:01 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Billy Nees (Post 605459)
Going by that reasoning maybe we should have a "20 year rule" again in Stock Eliminator.
(does anybody on here even remember that?)

yes, I remember, lost a lot of good cars to that, some racers quit , also. nhra wanted to get rid of older cars, eventually, it was set at 1960 and newer. recently, it was changed to 1955 and newer, only chevys are allowed.

Todd Hoven 01-04-2020 09:55 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Terry Cain (Post 605276)
Hasn't been a flat tappet motor produced in 20 yrs or more but still the flat tappet racer wants to have a dis-advantage over the newer cars. SMH

Name one roller cam combo that has an advantage over a flat tappet cam combo with the way the cars are classed now?

No we want to race our cars the way the stock rules were intended. We like stock, not super stock. For all you people that think your problems, reliability, and monetarily will be completely solved with allowing your combo to run a roller cam it won’t be. You will still be slow and break parts. Roller lifters break. Ask guys that race Super Stock.

Terry Cain 01-04-2020 09:58 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Billy Nees (Post 605459)
Going by that reasoning maybe we should have a "20 year rule" again in Stock Eliminator.
(does anybody on here even remember that?)

OR maybe a Vin tag?

Billy Nees 01-05-2020 08:19 AM

Re: "Old School" Stocker Cams
 
The mind is a terrible thing. Of course I meant the 15 year rule that was put in place to remove all of the 55-57 Chevys from Stock Eliminator.

Steve Sullivan 01-08-2020 02:02 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Dan Fahey (Post 605213)
Let’s see.....started out as G/PS
Ran 13.65 on 14.10 index in heat, 13.20 on good day.
Drove to countless bracket race events on the East Coast for 20 years.
Including all the IHRA races and Class Nationals.
Empire, Pittsburgh, Richmond, Budds Creek, Lebanon Valley, Island Dragway, Numidia, Beaver Springs, 75&80, Mason Dixon
Changed all 4 wheels to racing tires and wheels.
Back to street to go to motel and back to racing set next day.
Mounted Street tires and back home.
Because that is what I had.

Last Three years tow with a 1994 Caprice wagon and Featherlight trailer.
Took a bit to make it safe and reliable.
Oh and the discoveries of towing, owning and maintaining a trailer.

Just before trailering moved up to F/PS.
Every year found 2 tenths improvement and documented it.

F/PS index 13.75..! Best 12.47 at 107 mph on a good day.
Hot days can run within 2 tenths of the K/SA index, Atco, Cecil a 10th.
Still has a couple more in it too..and going to find them..
Always fiddling and finding incremental improvements..
Goal is to run the 12.65 index on a hot day set up as a Pure Stocker.

But Guess you are right again..!
I do not spend 10 cents, 10 dollars or thousands on anything !
I invest !

I have a real Stocker...you have a Super Stock Light car..
Or is it Called Modified Stock now...!?

At least my car is not so sensitive that it cannot be bracket raced.
Doesn’t need special gas, new harnesses every wink of an eye.
Or Wheelie Bar, Cage, or that fancy sputter putter take off technology.

As for spending money?
How come you are not racing a REAL race car ...
...... like a AA Fuel Dragster or Funny car? :eek:
What is the matter you cannot spend the money?

Life is short...I am out to have fun..you are not part of the arithmetic!
I attend S/SS association and Club races where I am welcomed.

I am not here on this planet to meet someones pathetic specious concept...
I do things my way..and been damn successful..

If NHRA doesn’t want my business it goes elsewhere.
And I will invest in those Races..!

I do not need NHRA. .....they need US!

D

So Mr. Legend in his own mind (and nobody else's), if we tell you that your annoying, long winded posts are not welcome hear, you promise to go somewhere else? Your attempt at being provocative on this forum has become very tedious. Please STFU!!

Dan Fahey 01-08-2020 03:44 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Steve Sullivan (Post 605710)
So Mr. Legend in his own mind (and nobody else's), if we tell you that your annoying, long winded posts are not welcome hear, you promise to go somewhere else?
Your attempt at being provocative on this forum has become very tedious. Please STFU!!

I think you meant ..."you are" or "you're"..and..."welcomed here !!"
Try again !

d

bykr 01-08-2020 04:09 PM

Re: "Old School" Stocker Cams
 
I don't have a dog in this fight, but roller cams in Stock, really?? Getting kinda ridiculous.

Dan Fahey 01-08-2020 09:36 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by bykr (Post 605749)
I don't have a dog in this fight, but roller cams in Stock, really?? Getting kinda ridiculous.

Many car from the 90’s on have them .

D

Billy Nees 01-09-2020 08:26 AM

Re: "Old School" Stocker Cams
 
Then race a car built "from the 90's on".

Jeff Stout 01-09-2020 09:30 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by bykr (Post 605749)
I don't have a dog in this fight, but roller cams in Stock, really?? Getting kinda ridiculous.

88 Olds 307 came standard with roller cam

Billy Nees 01-09-2020 09:36 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Jeff Stout (Post 605802)
88 Olds 307 came standard with roller cam

"Certain" 88 Olds 307's came standard with roller cams.

Jeff Stout 01-09-2020 12:45 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Billy Nees (Post 605803)
"Certain" 88 Olds 307's came standard with roller cams.

Your right. I had someone question my motor and had to show the different 307 on Dwight's page

rick winchester 01-09-2020 05:51 PM

Re: "Old School" Stocker Cams
 
I don't know if its old school enough but a Lunati 930b 390/410 h was the best sounding cam I ever had. Seemed to run real good in good air but fell off a lot when it got hot Rick.

Greg Reimer 7376 01-09-2020 08:24 PM

Re: "Old School" Stocker Cams
 
Was that a '68 327/250 horse combo? Mine does that. I've used Lunati and Bullet cams in them as well.

rick winchester 01-10-2020 12:31 PM

Re: "Old School" Stocker Cams
 
It was a 71 350/270/278 hp Isa camaro.

Cbrinson47 10-19-2020 09:04 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Terry Cain (Post 604792)
They actually checked lift and duration. Also checked springs.

Those were the type of cams and valve springs allowed in IHRA's Pure Stock classes !

Cbrinson47 10-19-2020 09:15 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Todd Hoven (Post 605087)
Listen, it’s a bad idea. When guys are breaking flat tappets and other valvetrain parts it’s time to get help from someone who knows what they are doing, because they don’t . Or they need to ramp up their maintenance program. Changing the rules for racers that can’t build reliable engine is stupid. I’ve made about 200 runs with the Coronet. It has a flat tappet cam as per the rules, and we have never broken a valvetrain part during my time as the driver. It’s a Hemi in that with not the best valvetrain geometry. So there is a great example of when something is assembled with the right parts how good the reliability can be.

Not really worried about an internet discussion how I’m perceived about this. I think it’s a bad idea and I spoke up about it.

So you think just allowing roller lifters is going to make this a cheap sport and make everybody reliable? You don’t think anybody’s going to exploit that and make the engines run harder than they do right now with these new parts? Then we all have to buy a roller lifters and roller cam to keep up. Then we all have to buy roller lifters and roller cams to keep up. How many good Stock eliminator racers are looking for a roller lifters for their engine? More or less than 10? Wie will have 10,000 RPM 396s, then how much money are we going to spend to keep up with them? BTW, you can get quite a bit of performance out of lower valve spring pressures if the right parts are used.

NHRA screwed up stock when they allowed any spring pressures.

GTX JOHN 10-20-2020 04:27 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Dan Fahey (Post 605746)
I think you meant ..."you are" or "you're"..and..."welcomed here !!"
Try again !

d

I believe "your" is correct in the context it was used.

However, I graduate High School in mid 60's.

Also ( As my X Wife would explain to you ) =
I am generally wrong all the time!

Stan Weiss 10-20-2020 04:03 PM

Re: "Old School" Stocker Cams
 
1 Attachment(s)
I dug up some old data. This is the lifter raise for a Lunati sticker cam for a 302 Z28 from the mid '70s.Let me add that by the time I got to check the cam it was used.



Stan

GTS340 10-20-2020 04:17 PM

Re: "Old School" Stocker Cams
 
I remember we put what was called a 7000 plus Cheater cam in a 1868 Dart GTS 340. This was around 1975. Best camshaft way back that I had was a G K that McElroy had something to do with. That was around 1980.
Had Rhodes lifters and 273 adjustable rocker arms. With some pencil neck pushrods compared to todays. Those good old days when tuning was an art and records were set.

Paul Haszlauer

SSDiv6 10-20-2020 06:54 PM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by GTS340 (Post 626199)
I remember we put what was called a 7000 plus Cheater cam in a 1868 Dart GTS 340. This was around 1975. Best camshaft way back that I had was a G K that McElroy had something to do with. That was around 1980.
Had Rhodes lifters and 273 adjustable rocker arms. With some pencil neck pushrods compared to todays. Those good old days when tuning was an art and records were set.

Paul Haszlauer

General Kinetics 041/560 grind number, the best Mopar cam grind before the rules were changed. You could balance the lifter on the lobe. It was designed by the Don Twelles, the owner of GK, one of the brightest cam designers ever and was a former Ford engineer. He designed also the cams for Grumpy Jenkins in the early days of Pro Stock.

Ralph A Powell 10-20-2020 07:41 PM

Re: "Old School" Stocker Cams
 
And Gapp and Roush. I herd that he was working for Roush after he closed his shop.

Mike Taylor 3601 10-20-2020 09:51 PM

Re: "Old School" Stocker Cams
 
I can say,I have ran under the old style rules spring pressure and lift, duration and overlap and it having to check.... and I have and do run under current rules....
I would pick current rules on cam,lifters and springs...been there done the stock pressure spring,which was checked...and duration overlap....
my IHRA pure stock combo 305/160/230 ABSOLUTELY ate springs and valves and it LOVED the taste of them... if nothing went wrong about 35-50 runs heads were coming off for valve job, valves and springs....

present rule stocker... I have one right now in D3 with 3 seasons on engine and same springs... had one with 500 runs on cam and lifters...had 300+repeatedly

I will take current rules on springs...
however if I built another stocker it would be a roller cam car... no other reason than eliminating cam break in...

James L Miller 10-21-2020 01:32 AM

Re: "Old School" Stocker Cams
 
2 Attachment(s)
Any of the Mopar 340 guys ever run either of these cams? I think the Lunati is from the 1990s, GK maybe the 1970s?

Cbrinson47 10-21-2020 09:39 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Terry Cain (Post 604792)
They actually checked lift and duration. Also checked springs.

You forgot.......they also checked overlap !

Cbrinson47 10-21-2020 09:50 AM

Re: "Old School" Stocker Cams
 
Quote:

Originally Posted by Dwight Southerland (Post 605102)
If the valve spring pressure were reduced, after a period of adjustment there would be no more carnage than allowing roller lifters and it would be a whole lot cheaper for the majority of racers.

I would say 150 lbs seat pressure and 350 lbs open pressure max !


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