IDT porn now with flow #'s!

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

cool40 wrote:got some #'s on them today...... in..200=176.300=241.400=321.500=400.600=452.700=472.800=486.900=498 ex..200=153.300=204.400=246.500=302.600=334.700=348.800=359.900=368

Frank Kramer wrote:

cool40 wrote:the push rods i dont know about yet,the rest is same as a460.the deal with the valves bee'n so big,as Lem said "big as a cows ass",they get heavy and heavy dont like high rpm.these heads are high rpm or big inch so ti valves are a must or it's a waste.at about the same point the shaft rockers start to look like a good idea too but i'm gona run the crower's for now and see what happens.

I would realy put a set of shaft rockers on them. There is not much difference between studs/ rockers and girdle or a good set of shaft mounted. But the shaft mounted are much better.
How much lift and seat pressure are you going to run?

Frank

rmcomprandy wrote:

Frank Kramer wrote:

cool40 wrote:the push rods i dont know about yet,the rest is same as a460.the deal with the valves bee'n so big,as Lem said "big as a cows ass",they get heavy and heavy dont like high rpm.these heads are high rpm or big inch so ti valves are a must or it's a waste.at about the same point the shaft rockers start to look like a good idea too but i'm gona run the crower's for now and see what happens.

I would realy put a set of shaft rockers on them. There is not much difference between studs/ rockers and girdle or a good set of shaft mounted. But the shaft mounted are much better.
How much lift and seat pressure are you going to run?

Frank

What exactly is it that makes the shaft mounts BETTER ...?

The ones available for an A460 don't flex any less and aren't more stable than good stud mounts with a well made girdle.

They do however look cool, retain their lash when you remove them and replace them and cost a lot more.

BETTER is a very subjective term.

To me, better means more power, less deflection and higher durability and they won't do ANY of those things, especially with high valve spring pressures and big pushrods.

Spend the money to DO the Spintron testing and find out the truth of the matter.

cool40 wrote:

rmcomprandy wrote:

Frank Kramer wrote:

cool40 wrote:the push rods i dont know about yet,the rest is same as a460.the deal with the valves bee'n so big,as Lem said "big as a cows ass",they get heavy and heavy dont like high rpm.these heads are high rpm or big inch so ti valves are a must or it's a waste.at about the same point the shaft rockers start to look like a good idea too but i'm gona run the crower's for now and see what happens.

I would realy put a set of shaft rockers on them. There is not much difference between studs/ rockers and girdle or a good set of shaft mounted. But the shaft mounted are much better.
How much lift and seat pressure are you going to run?

Frank

What exactly is it that makes the shaft mounts BETTER ...?

The ones available for an A460 don't flex any less and aren't more stable than good stud mounts with a well made girdle. thats what i like about these heads,use all the stuff you have already got for your A heads and make the power of a C head!

They do however look cool, retain their lash when you remove them and replace them and cost a lot more.

BETTER is a very subjective term.

To me, better means more power, less deflection and higher durability and they won't do ANY of those things, especially with high valve spring pressures and big pushrods.

Spend the money to DO the Spintron testing and find out the truth of the matter.

rmcomprandy wrote:

cool40 wrote:

rmcomprandy wrote:

Frank Kramer wrote:

cool40 wrote:the push rods i dont know about yet,the rest is same as a460.the deal with the valves bee'n so big,as Lem said "big as a cows ass",they get heavy and heavy dont like high rpm.these heads are high rpm or big inch so ti valves are a must or it's a waste.at about the same point the shaft rockers start to look like a good idea too but i'm gona run the crower's for now and see what happens.

I would realy put a set of shaft rockers on them. There is not much difference between studs/ rockers and girdle or a good set of shaft mounted. But the shaft mounted are much better.
How much lift and seat pressure are you going to run?

Frank

What exactly is it that makes the shaft mounts BETTER ...?

The ones available for an A460 don't flex any less and aren't more stable than good stud mounts with a well made girdle. thats what i like about these heads,use all the stuff you have already got for your A heads and make the power of a C head!

They do however look cool, retain their lash when you remove them and replace them and cost a lot more.

BETTER is a very subjective term.

To me, better means more power, less deflection and higher durability and they won't do ANY of those things, especially with high valve spring pressures and big pushrods.

Spend the money to DO the Spintron testing and find out the truth of the matter.

Adding something I've said in the past about these heads to my last post isn't really beneficial as it doesn't exactly have anything to do with the valve train.

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

G-Code wrote:

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

Does someone make a set that take less set-up than T&D's ?

After running mine I'll run shafts anytime I have the money to do so. When I get around to building my spare engine I'll use my old Crower S/S enduros and Jomar set-up.

G-

c.evans wrote:Nice numbers cool40. Were the exhausts flowed with a test pipe?

Uncle Charlie

BOSS 429 wrote:

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

I USE THE JESSEL ON THE EX 514 HEADS, WELL WORTH IT, FOR THE RPM THESE HEADS NEED TO SEE I WOULDNT RUN A STUD MOUNTED ROCKER

rmcomprandy wrote:

BOSS 429 wrote:

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

I USE THE JESSEL ON THE EX 514 HEADS, WELL WORTH IT, FOR THE RPM THESE HEADS NEED TO SEE I WOULDNT RUN A STUD MOUNTED ROCKER

"WELL WORTH IT" is totally subjective.
I just know your OPPINION is much more conducive than any actual testing on a Spintron could possibly be. After all, YOU SAID SO, lol.

cool40 wrote:

c.evans wrote:Nice numbers cool40. Were the exhausts flowed with a test pipe?

Uncle Charlie

no,that was without.the ex. was better than i thought it would be but intake was a little less.i went back and looked at eliminator's web site and it's not realy clear where the "peak" #'s they speak of are at.we only went to .900 and these things can be bought with springs to go over 1.0 so who knows. the .500 #'s were pritty good i i thought.the guys who flowed them said that a stainless valve would show a better number than a ti. would,becouse of the thin edge on the head? you ever saw that Charlie?

BOSS 429 wrote:

rmcomprandy wrote:

BOSS 429 wrote:

Lem Evans wrote:If/when a guy had an A460 cyl head designed for a shaft rocker deal it'd be cool ......I aint seen one yet.

I USE THE JESSEL ON THE EX 514 HEADS, WELL WORTH IT, FOR THE RPM THESE HEADS NEED TO SEE I WOULDNT RUN A STUD MOUNTED ROCKER

"WELL WORTH IT" is totally subjective.
I just know your OPPINION is much more conducive than any actual testing on a Spintron could possibly be. After all, YOU SAID SO, lol.

I have no doubt that you've tested those bolt down, shaft mounted rockers but, that is not near the same thing as COMPARING the performance of the two different valve train systems using the exact same tests.


-----------------------

LOL, NO NOT SAID IT,TESTED IT, ROCKER IS MORE STABLE AT HIGHER LIFTS AND RPM THAT THESE,AND THE EX514 HEAD NEEDS FOR MOST POWER, THIS ALSO EXTENDED VALVETRAIN,
LIFE. WE HAVE RAN THESE TO 10,100 RPM FROM 27 RUNS,TO 40 SEC RUNS AT A TIME. THIS IS FACT. YOU SAID SOMETHING?

Lem Evans wrote:Wants and needs are not the same thing.

DanH wrote:

Lem Evans wrote:Wants and needs are not the same thing.

if I need a 1.90 ratio -- one guess what I want . hint not 1,80 or 1.73