1.9:1 ratio rockers to suit Buick (non ecotec) V6's

[crazybiker]

What does the booster upgrade really do?

I've noticed that mine pulls up fantastic with the booster and M/C (But the V8 ones).

 

[MACE]

What does the booster upgrade really do?

I've noticed that mine pulls up fantastic with the booster and M/C (But the V8 ones).

The brake booster upgrade makes it easier to apply the brakes. More of an issue when you start playing around with master cylinders

Cheers
Steve

 

[vr1uz-fe]

Mines still sounding very rattly. Im just about out of ideas. Im taking it to a couple of mechanics that I know to get them to have a listen.

Ive Changed the oil to 20W50
Checked lifter pre load with original gear and mace 1.9:1 rockers both about 1.5 turns.
Checked PTV clearance by getting piston at TDC and removing valve springs and dropping valve onto piston. There was ~10mm clearance here so its definately not an issue.
Checked for coil bind very hard to tell but I don't think they are binding.

Has anyone else on here fitted the crow valve springs with these rockers?
They are a single spring with and dampener (which is like a flat internal spring).

Ryan

to check coil bind a paperclip should fit through the gaps of the spring

 

[MACE]

In LX_HATCH, there was a slight manufacturing variance in the pushrods and the tight tolerances of our rockers which caused the ticking noise. This will be sorted shortly though.

Cheers
Steve

 

[LX_HATCH]

Thanks for the heads up steve, could you please contact me via email once you have a set ready.

Cheers

 

[MACE]

Definitely

Cheers
Steve

 

[rob_rob]

wat are the tourque specs to bolt these down??

 

[MACE]

25Nm of torque for the job would do the trick

Cheers
Steve

 

[MEESEN]

Hey mate are these roller rockers? not non-rollers?

 

[Raptorsc]

Click on the picture in this post

http://forums.justcommodores.com.au...rs-suit-buick-non-ecotec-v6s.html#post1457648

And you have your answer