was wondering if someone could explain the dirrence and applications of these rockers im pondering of purchacing

http://www.cranecams.com/master/goldrace.htm

Chevrolet V-6 80-94, 173 (2.8L) and 189 (3.1L) cu.in.
Non-Self Aligning, Narrow Body Rocker Arms
Stock ratio with special stud diameter 99795- 1.50 3/8” 25750-12d
Increased ratio with special stud diameter 99795- 1.60 3/8” 25759-12d

whats the increased ratio change over stock?

 

The stock rockers are 1.5 ratio the second set are 1.6's.
Stock cam and stock ratio 1.5 rockers you will get:
.394 lift on the intake
.401 lift on the exhaust
( )
Stock cam on the 1.6 rockers will getthis is the difference over stock 1.5's)
.420 lift on the intake
.437 lift on the exhaust side

I would only push those stock springs to .440''(and thats pushing it), at .475'' stuff breaks.
If you ever wanted to put a bigger cam in I could tell you how to get around .510'' and all you would need is $90 of parts and a $15 tool.

 

i wouldnt do it.

 

hmm


i would just love to hear you explain all this

i dont know if i will be replaceing my cam anythime soon, if its a tough job to do on a 2.8, if i should replace the springs, the car will rpolly roll over 100,000 kilometers this week

i dont want to do an engine swap ever on this car, im buying an iroc next summer.

i just want it to be reliable, relitivly gutsy, and reliable. iuts the berlinetta so its got all the fancy digital crap. my friends love the 'starship' things in it

but im interested in roller rockers