1.8 RATIO, SLP roller rockers

[9t8z28]

I was wondering if I put SLP's 1.8 ratio rockers on my 98 Z28, with a proper tune, would I have any problem passing PA emissions tests?

[Hi-Po]

I dont beleive so. But why put them on at all? Put your money into something else IMO.

[Redphoenix1998]

stock rockers are fine and for the price, invest in something else

[Transam388]

As the others have said, stick with the stock rockers. I had gotten the 1.8 Crane roller rockers but then if you go to a more aggressive cam you have to start worrying about clearnance issues both with valve / pistons and valve covers. I went back to 1.7 and don't think 1.8's are worth it IMO.

[mrr23]

no tune is needed if you go larger ratio rockers. while it can be a high doller per hp gain, for those that want more without changing a cam, it's a good direction to go.

as far as cam selection goes, so long as your springs can handle it and you have proper piston to valve clearances, there won't be a problem.

[nhraformula]

i had the slp 1.85s and sold them.
save the money for a cam kit or headers.

[GatorSS]

If you can pass the emissions test now, you'll still pass it with the new rockers.

[vettenuts]

Larger ratio rockers will increase the overlap triangle, is it a sniff test?

[nhraformula]

Larger ratio rockers will increase the overlap triangle, is it a sniff test?

still pass