WHAT CAUSED THIS ROCKER ARM TO BE BEAT UP

Quote:

---

Originally Posted by donovan

yup, when I went from 1.7 to 1.6... I saw only a slight change, not even 1 percent..

They are only opening the valve slightly more, you are not going to see significant changes till you open them longer or change the LSA.

DD

---

ok... it is no secret that I'm ignorant when it come to motors so I'll go ahead and ask... what is LSA???

http://www.lsadc.org/

I love google

jb

JB ... you are over the top, sometimes.

Lobe Separation Angle

Aggressive LSA is what gives that tell-tale sound at idle

Quote:

---

Originally Posted by mitchntx

JB ... you are over the top, sometimes.

Lobe Separation Angle

Aggressive (smaller number...) LSA is what gives that tell-tale sound at idle

---

Playing with the LSA and general lobe timing, especially with the closing of the intake valve can help make SICK power from an N/A high compression motor. split lifts, split durations and tight LSA's can help make a motor that pulls like a truck down low and breathes like a high strung motor on the top end...

there are so many things you can do with camshafts now days compared to the e-cam which was developed in the 1930's.... :roll: CMC's got to be the suck for that kind of stuff...? :oops:

Quote:

---

Originally Posted by mitchntx

JB ... you are over the top, sometimes.

---

Sarry.
Wus the pante fums tokin.
jb

9.5 to 1.

Removed .050" from the heads. Eric had removed .010" at the last rebuild.

I got the heads back today. Start assy. tomorrow. I will have to shim the rockers and get different pushrods. This is getting expensive. Shortblock, oil pump, timing gear and chain, head work, headers, gasket set, water pump, oil pan, and cam, plus all the little stuff like plugs, oil and filter (two times) and other misc. crap. I hope the added compression will get me to the numbers. The old motor was sick!

JJ

Jerry - using the stock steel rockers is SO simple and cheap, it's ridiculous. You can find excellent used rockers w/fulcrums for ~$20-$30. Bolt them into place, torque the bolts correctly, and go race. Hell, I think I have 3 sets laying around.

FWIW, I've gone back and forth about RR's, and decided awhile ago not to use them. Since we aren't permitted to do them properly (screw in studs, guide plates and hardened pushrods), I won't install a set at all, and stick with the stock steel units. Check them once a year for wear, retorque, go out and race. Does it get any easier?

Remember - KISS. ;)

Quote:

---

Originally Posted by jeffburch

Quote:

---

Originally Posted by mitchntx

JB ... you are over the top, sometimes.

---

Sarry.
Wus the pante fums tokin.
jb

---

All I got outta that was "tokin" :shock: did i really say that??? :oops:

Quote:

---

Originally Posted by Adam Ginsberg

Jerry - using the stock steel rockers is SO simple and cheap, it's ridiculous. You can find excellent used rockers w/fulcrums for ~$20-$30. Bolt them into place, torque the bolts correctly, and go race. Hell, I think I have 3 sets laying around.

FWIW, I've gone back and forth about RR's, and decided awhile ago not to use them. Since we aren't permitted to do them properly (screw in studs, guide plates and hardened pushrods), I won't install a set at all, and stick with the stock steel units. Check them once a year for wear, retorque, go out and race. Does it get any easier?

Remember - KISS. ;)

---

Adam,

I would still have to shim the rockers and buy shorter pushrods.....right?


JJ

Quote:

---

Originally Posted by mitchntx

JB ... you are over the top, sometimes.

Lobe Separation Angle

Aggressive LSA is what gives that tell-tale sound at idle

---

you mean when the motor has a "lope"??... I remember back in high school when guys thought they were cool and said "sounds like its got a cam in it"... no shit sherlock :P