Advantages/Disadvantages of solid roller
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Joined: Oct 2002
Posts: 6,518
jonaddis84,
Yeah we are talking about something in the range of a 954 or 943 Comp spring. The 954's are less expensive and have less seated pressure, so they will not beat up your lifters as much. The cost matters too since the springs should be checked at 10,000 and the 954's need to be replaced then. The 943 PacAlloys can go a longer haul, but have more seated spring pressure which means that the lifters will need to be rebuilt more often. So there are trade offs. 954-16 runs around $135 where the 943-16 runs about $290, and beats up on lifters faster. And your not going to get 2 times the life out of the 943's
LT1Brutus,
The ramps are going to beat up on springs, but the lift is really what kills them. The ramps require the stronger springs and the lift eats them up.
Brent,
The 383 you guys have really shouldn't run a Solid Roller anyways. The RPM and power that the Solid Roller makes is going to really take it's toll on that setup. Not saying that it's not good, but your pushing it's limits then.
When you can't run a knock sensor then you can run less compression both static and dynamic and not worry about knock. A good chamber and a revearse cool head is not going to get you in trouble as fast as SBC so 11:1 to about 11.5:1 is really safe with a solid roller and the DCR you normally work with there.
Or you can study plugs, but as Fred says that takes one hell of an eye and experience to look at.
IMHO the big advantage of the SR is the 6000+ rpm range where you don't have HR lifter problems. It allows the motor to just work up there. Alot of LT1 HR graphs you'll see power just die above 6,000 or never grow. One reason why I'm a fan of smaller HR cams, because you are fighting a uphill battle over 6,000 where the larger durations shine, and on top of that losing TQ below 6,000 where the LT1 intake is killing you.
As for a daily driver SR, I'm still up in the air about that. The SS is looking for a new motor and i'm still debating about a SR or a HR because I put enough miles on it in a year to warrant at least one set of new springs a year.
Bret
Yeah we are talking about something in the range of a 954 or 943 Comp spring. The 954's are less expensive and have less seated pressure, so they will not beat up your lifters as much. The cost matters too since the springs should be checked at 10,000 and the 954's need to be replaced then. The 943 PacAlloys can go a longer haul, but have more seated spring pressure which means that the lifters will need to be rebuilt more often. So there are trade offs. 954-16 runs around $135 where the 943-16 runs about $290, and beats up on lifters faster. And your not going to get 2 times the life out of the 943's
LT1Brutus,
The ramps are going to beat up on springs, but the lift is really what kills them. The ramps require the stronger springs and the lift eats them up.
Brent,
The 383 you guys have really shouldn't run a Solid Roller anyways. The RPM and power that the Solid Roller makes is going to really take it's toll on that setup. Not saying that it's not good, but your pushing it's limits then.
When you can't run a knock sensor then you can run less compression both static and dynamic and not worry about knock. A good chamber and a revearse cool head is not going to get you in trouble as fast as SBC so 11:1 to about 11.5:1 is really safe with a solid roller and the DCR you normally work with there.
Or you can study plugs, but as Fred says that takes one hell of an eye and experience to look at.
IMHO the big advantage of the SR is the 6000+ rpm range where you don't have HR lifter problems. It allows the motor to just work up there. Alot of LT1 HR graphs you'll see power just die above 6,000 or never grow. One reason why I'm a fan of smaller HR cams, because you are fighting a uphill battle over 6,000 where the larger durations shine, and on top of that losing TQ below 6,000 where the LT1 intake is killing you.
As for a daily driver SR, I'm still up in the air about that. The SS is looking for a new motor and i'm still debating about a SR or a HR because I put enough miles on it in a year to warrant at least one set of new springs a year.
Bret
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Joined: Apr 2003
Posts: 1,591
From: PA
Originally posted by SStrokerAce
Brent,
The 383 you guys have really shouldn't run a Solid Roller anyways. The RPM and power that the Solid Roller makes is going to really take it's toll on that setup. Not saying that it's not good, but your pushing it's limits then.
Brent,
The 383 you guys have really shouldn't run a Solid Roller anyways. The RPM and power that the Solid Roller makes is going to really take it's toll on that setup. Not saying that it's not good, but your pushing it's limits then.
My dyno bombdives after 6k
Thats fine since i didn't want to spin that high anyways. Not that i'm going in there to switch them, but in theory how much of a difference would ccompR lifters have made with my setup above 6k rpms?-Brent
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Joined: Oct 2002
Posts: 6,518
Brent,
All depends upon the springs you are using. You have XE ramps and they usually like either a Hydra Rev or a heavier spring to make them work, and that coupled with the Comp R's will keep the HP peak up till 6,500, and the hydra rev usually a little more than that.
As for the 383, you really need a bottom end that can hold 600hp because with good heads and the rest of the setup done right that's going to happen. So unless you have a 4 bolt block, good pistons and rods (i'd still run a Scat Cast, since it's a street car and stays below 7K) then you can do it.
Bret
All depends upon the springs you are using. You have XE ramps and they usually like either a Hydra Rev or a heavier spring to make them work, and that coupled with the Comp R's will keep the HP peak up till 6,500, and the hydra rev usually a little more than that.
As for the 383, you really need a bottom end that can hold 600hp because with good heads and the rest of the setup done right that's going to happen. So unless you have a 4 bolt block, good pistons and rods (i'd still run a Scat Cast, since it's a street car and stays below 7K) then you can do it.
Bret
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Joined: Oct 2002
Posts: 1,639
From: Toledo, OH
So what Im getting out of SStrokerace and 94formulas conversation is unless i want to rev way above 6500 then there is no reason to go with a SR setup. Now if I want to rev all the way to 6500 and maybe 6600 or so, you are saying to really get any power above 6000 Ill want heavy seat pressure springs, and possibly a hydra rev kit? Im planning on an XE grind, not sure what yet, so what do you think my valvetrain setup should be?
Since Ive got some really intelligent guys in this post ill ask now, I know its a cliche question that there is no one answer, but you guys can kinda guide me. I dont know what cam yet, my first thought was the XE236/242, but now that I hear SStrokerace saying he does not like high duration cams since they are really high rpm cams, what is something that will give me killer torque from way down low, im not really looking for peak hp #s over 6500, it is an all street setup and I loved the down low torque my XE224/230 produced. Maybe I should look more into maybe the 230/236 with the high lift grind, over .600 on both i think?
Since Ive got some really intelligent guys in this post ill ask now, I know its a cliche question that there is no one answer, but you guys can kinda guide me. I dont know what cam yet, my first thought was the XE236/242, but now that I hear SStrokerace saying he does not like high duration cams since they are really high rpm cams, what is something that will give me killer torque from way down low, im not really looking for peak hp #s over 6500, it is an all street setup and I loved the down low torque my XE224/230 produced. Maybe I should look more into maybe the 230/236 with the high lift grind, over .600 on both i think?
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