Does anyone have aftermarket rocker arms in there GP's? I just got mine from Intense. The 1.9 phase 3 rollers made by Harland Sharp. I wanted to know how they are working out and if there are any adjustment issues. Like do they require maintenance.

If they install like any of the other rocker arm setups then you should not have to do anything once they are properly put in.

The important thing to keep in mind is: the bolt holes are not filled with oil when you reinstall (since it might give a false torque reading) and to make sure the bolts are torqued down properly (along with the half turn on some setups).

Good luck!

What are the roller rockers supposed to add as far as performance? Just curious...

They open up the valves to let more air in and out. You want this especially if you're shoving in more air with a smaller blower pulley.

That's kind of what I thought, but wasnt sure how much improvement was noticed on the 3.8; it's set up fairly well from the factory. I've installed these on Mustang 5.0's, where the factory didn't even use rollers to start with. Seeing how GM does things a little better, I wasn't sure of the results.

Roller rockers also reduce stress and friction and allow the engine to rev quicker and smoother than non roller rockers. A full roller cam set-up is the best.

I believe the 3.8's have rollers from the factory, or is it only on the later models?

The 3.x engines use a roller fulcrum with a solid tip. The main advantage of the aftermarket roller rockers is a greater rocker ratio. In my opinion the only real way to increase lift is with the cam. Moving the pushrod pocket around effects valvetrain geometry and puts the pushrod in a less advantageous angle.
The 3.x engines do have a roller valvetrain except for the rocker trunions. I'm not sure about the reducing friction and reving quicker. Maybe only in a boundary lubrication situation or start up. Also, I'm not sold on the theory that roller tips actually roll. I could write a whole page on that but you wouldn't finish reading it do to excessive eye glaze-over.

I forgot to mention, with the slp or stage 3 alum. rockers, less mass is always good. It does wonders for valvetrain stability. That is what I see as the main advantage of aftermarket rockers.

the 1.9 roller rockers are a reasonable tradeoff giving u more lift around 484 but no signifigant effective duration,but its afairly easy swap even for the non pro. u should see about a20hp gain at peak for all out a cam is the way Chico

When I used to install them on the 5.0 Fords, the performance difference was marginal. Maybe a little more high rpm power, but that was it. And those engines didn't even have roller anything from the factory, so there was more of an improvement supposedly made by switching to roller rockers. So, given how much better the 3.8's seem to be from the factory is why I questioned the actual improvement.

I thought all the 5.0's(HO)after 85 were roller motors. Maybe the best motor from ford. Are you sure? I could've sworn they were. I will do a full roller setup on my chevelle when I get an extra grand. They make high lift very streetable.
Jack

Actually, you're partially right. 85 and later 302's had roller lifters, but not rockers. Believe me, the 302 isn't as good of an engine as you might think. Life expectancy is usually not over 140-160,000 miles. At that point, they have low oil pressure, start to burn oil a bit, and compression falls a little. It's a very old-tech engine, and it kind of shows sometimes. You wind up a stock one anywhere past 4500 rpm, and it sounds like the valves are going to go through the hood. But, the easiest and cheapest to modify. That's why everyone loves 'em. Now, I know that next someone is going to post, saying that their buddy had one with like 250,000 miles on theirs. There's always exceptions. The 5.0's are nothing like the 3.8's when it comes to refinement and longevity.

I'm hoping for the longevity thing. I have a friend that I made a Englishtown race track that runs a heavily modded 5.0 with a stock lower end in the nines. All his money went into the top end(heads and such). The cam is different etc...Says the short block is almost indestructable.