what rockers should i get?
07-04-2008, 10:35 AM
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what rockers should i get? i'm having trouble deciding what rocker arms to run on my new engine. it's a fairly large LSX (
) that should have TFS245's on it. street/strip car with hydraulic cam....just curious what others are running with/without success and whether i should have adjustable ones or not...
) that should have TFS245's on it. street/strip car with hydraulic cam....just curious what others are running with/without success and whether i should have adjustable ones or not... 
07-04-2008, 11:51 AM
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If you are asking about the ratio, well . . . go as large as possible to get the valves open quicker. I understand they run a 2.0:1 ratio in NASCAR. Personally, I would go 1.85:1 with Jesel brand rocker arms. Very strong and very dependable. But, generally over $1,500.00 for a complete engine, plus pushrods. If you stay at 1.8:1 I believe CompCams and Crane have lower cost alternatives.
I use Harland-Sharp non-adjustable 1.8:1 rocker arms with the Cadillac racing hydraulic lifters.
I use Harland-Sharp non-adjustable 1.8:1 rocker arms with the Cadillac racing hydraulic lifters.
Last edited by Gregory; 07-04-2008 at 12:17 PM.
07-04-2008, 01:27 PM
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i like the Jesels, i just don't like the price. i'm not doing a budget build, but i'm trying not to spend tons of money either. i just want a good quality, lightweight rocker that isn't going to spew needle bearings everywhere or become unstable at higher RPM's...
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07-04-2008, 06:25 PM
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so what are the real world benefits/drawbacks of these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
versus these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
versus these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
07-05-2008, 04:03 AM
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Part numbers for the CompCams Shaft Mount Aluminum Rocker Arm System are:
#1500 GM Gen III/LS1/LS2/LS6 1.7 ratio
#1501 GM Gen III/LS1/LS2/LS6 1.8 ratio
#1509 GM Gen III/LS1 RHS Pro Elite™ 1.7 ratio
No 1.85:1 ratio listed.
#1500 GM Gen III/LS1/LS2/LS6 1.7 ratio
#1501 GM Gen III/LS1/LS2/LS6 1.8 ratio
#1509 GM Gen III/LS1 RHS Pro Elite™ 1.7 ratio
No 1.85:1 ratio listed.
07-05-2008, 04:41 AM
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The second part has less deflection due to the long straight shaft. The force is distributed on the large shaft verses the mounting stud of the first part.
so what are the real world benefits/drawbacks of these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
versus these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
versus these
http://www.byunspeed.com/product_inf...4e46c3c5ba2198
07-05-2008, 12:12 PM
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Jesel's shaft mounts are in my 454 build because I wanted the best and strongest out there.
Then a couple of weeks ago one of the Jesels snapped in half at cruise speeds on the interstate coming home from the Hot Rod Power Tour. And Jesel's response after less than 2,500 miles on the clock was we don't warrant race parts.
So don't buy the hype that Jesel is head and shoulders over all other brands.
Then a couple of weeks ago one of the Jesels snapped in half at cruise speeds on the interstate coming home from the Hot Rod Power Tour. And Jesel's response after less than 2,500 miles on the clock was we don't warrant race parts.
So don't buy the hype that Jesel is head and shoulders over all other brands.
07-05-2008, 02:15 PM
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Jesel's shaft mounts are in my 454 build because I wanted the best and strongest out there.
Then a couple of weeks ago one of the Jesels snapped in half at cruise speeds on the interstate coming home from the Hot Rod Power Tour. And Jesel's response after less than 2,500 miles on the clock was we don't warrant race parts.
So don't buy the hype that Jesel is head and shoulders over all other brands.
Then a couple of weeks ago one of the Jesels snapped in half at cruise speeds on the interstate coming home from the Hot Rod Power Tour. And Jesel's response after less than 2,500 miles on the clock was we don't warrant race parts.
So don't buy the hype that Jesel is head and shoulders over all other brands.
07-05-2008, 05:40 PM
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The 454 setup is hooked to a 6 speed tranny. The shift light is set at 6,800 rpm and by the time I react it turns 7,200 rpm, which is where I want to shift. But as you will find out with the big cube LSX, power is instant and acceleration of rpm is VERY rapid anywhere in the powerband, which in my case is from 3,000 rpm up.
You will hear many on this site complain that a FAST intake will choke this setup....that you should go with sheetmetal....ignore that advice if you plan to run on the street. Your selection of the Trickflow 245's will produce huge power throughout the powerband and the FAST will aid in that approach. Port the FAST and you will be happy with the results.
Just the other evening a friend of mine running almost the same 454 setup in his SS embarassed a new Procharged Z06. The power is there.
You can see my buildup in the link in my signature.
Good luck in your build.
You will hear many on this site complain that a FAST intake will choke this setup....that you should go with sheetmetal....ignore that advice if you plan to run on the street. Your selection of the Trickflow 245's will produce huge power throughout the powerband and the FAST will aid in that approach. Port the FAST and you will be happy with the results.
Just the other evening a friend of mine running almost the same 454 setup in his SS embarassed a new Procharged Z06. The power is there.
You can see my buildup in the link in my signature.
Good luck in your build.
07-05-2008, 05:52 PM
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The 454 setup is hooked to a 6 speed tranny. The shift light is set at 6,800 rpm and by the time I react it turns 7,200 rpm, which is where I want to shift. But as you will find out with the big cube LSX, power is instant and acceleration of rpm is VERY rapid anywhere in the powerband, which in my case is from 3,000 rpm up.
You will hear many on this site complain that a FAST intake will choke this setup....that you should go with sheetmetal....ignore that advice if you plan to run on the street. Your selection of the Trickflow 245's will produce huge power throughout the powerband and the FAST will aid in that approach. Port the FAST and you will be happy with the results.
Just the other evening a friend of mine running almost the same 454 setup in his SS embarassed a new Procharged Z06. The power is there.
You can see my buildup in the link in my signature.
Good luck in your build.
You will hear many on this site complain that a FAST intake will choke this setup....that you should go with sheetmetal....ignore that advice if you plan to run on the street. Your selection of the Trickflow 245's will produce huge power throughout the powerband and the FAST will aid in that approach. Port the FAST and you will be happy with the results.
Just the other evening a friend of mine running almost the same 454 setup in his SS embarassed a new Procharged Z06. The power is there.
You can see my buildup in the link in my signature.
Good luck in your build.
i'm thinking i'll go with the YT ultralites, COMP's shaftmounts aren't in the budget just yet.
my concern now is to go 1.7 or 1.8.....is there any difference in going with one or the other if the lift at the valve is kept constant? i.e. a cam with .383" lobe lift & 1.7 rockers versus a cam with .361" lobe lift & 1.8 rockers? both equate to ~.650" gross lift...would the only difference be less rotating mass on the camshaft itself (due to less material on the lobes), or would the valves open faster or what?
07-08-2008, 05:26 PM
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my concern now is to go 1.7 or 1.8.....is there any difference in going with one or the other if the lift at the valve is kept constant? i.e. a cam with .383" lobe lift & 1.7 rockers versus a cam with .361" lobe lift & 1.8 rockers? both equate to ~.650" gross lift...would the only difference be less rotating mass on the camshaft itself (due to less material on the lobes), or would the valves open faster or what?
anyone?
