1.6 rockers?

[beardeddummy]

I was looking at doing this is have a tune, headers, ported and polished heads. I was wondering what all I would have to do to make it work. and how much gain could I see?

 

[skylark]

Get narrow body, 3/8 stud and they set up like any other rocker. I liked the Scorpions that I had in our old Denali. I went with them because roller rockers can be noisy and I never saw complaints about them. I was happy. Just a minor gain but I actually picked up quicker rpm and .5 mpg in town untuned.

 

[Supercharged111]

Don't need a tune for the rockers, you need a tune because the stock one is GARBAGE. I had to drill my pushrod holes, some don't. I went with Comp Pro Magnums, the chromoly ones. Massive overkill, but I wanted stock longevity. These are also very quiet. I wouldn't bother porting the heads, I don't think there's much to be had. Stick a marine cam in there instead.

 

[beardeddummy]

Don't need a tune for the rockers, you need a tune because the stock one is GARBAGE. I had to drill my pushrod holes, some don't. I went with Comp Pro Magnums, the chromoly ones. Massive overkill, but I wanted stock longevity. These are also very quiet. I wouldn't bother porting the heads, I don't think there's much to be had. Stick a marine cam in there instead.

I already did all I did was gasket match the intake ports and smoothed out the short side radius on the exhaust and gains were better than the tune, headers, and exhaust combined.

 

[beardeddummy]

Get narrow body, 3/8 stud and they set up like any other rocker. I liked the Scorpions that I had in our old Denali. I went with them because roller rockers can be noisy and I never saw complaints about them. I was happy. Just a minor gain but I actually picked up quicker rpm and .5 mpg in town untuned.

Did you have to clearance the pushrods?

 

[Supercharged111]

I already did all I did was gasket match the intake ports and smoothed out the short side radius on the exhaust and gains were better than the tune, headers, and exhaust combined.

Pics? I'd heard that these, like Ford's GT40P didn't respond well to porting. If there's more low hanging fruit out there, I'm all ears.

 

[Supercharged111]

Did you have to clearance the pushrods?

I don't think the rocker brand is everything, I think there was a point where GM started casting bigger holes.

 

[skylark]

No issues with the push rod holes.

 

[Supercharged111]

No issues with the push rod holes.

Since you were lucky I'm curious how you concluded there was no contact? I colored a pushrod with magic marker, installed the rocker, and rolled the motor over a couple of times and it scraped the marker off.

 

[beardeddummy]

Pics? I'd heard that these, like Ford's GT40P didn't respond well to porting. If there's more low hanging fruit out there, I'm all ears.

Unfortunately I don't have any but I can tell you there is alot of gain to be had but only gasket match the intake side.