ls1charged

iTrader: (8)

hey just wanted to know whats the better way to go, 1.5 or 1.6 roller rockers, what kind of gains can u see between the two and what kind of idle difference is there between the two, let me know what u guys know or have found from experience, thanks

96capricemgr

iTrader: (1)

depends on future plans and if you think there will be an idle difference you are thinking too hard.

ls1charged

iTrader: (8)

thats what i heard,( idle diff.) thats why i asked.

ls1charged

iTrader: (8)

Anybody?

the_merv

iTrader: (88)

I have never heard of any idle difference, then again I have a Cam, so it is completely tuned different. 1.6's will get you appx. 15 rwhp. They are a definate inprovement from the stamped steel rockers, they move alot easier. Actually pivot instead of slide.

ls1charged

iTrader: (8)

im gonna have a cam too, im doing a complete rebuild of my motor, stock rockers are 1.5's right?,but there not roller right?, how much of a gain could i see if i got 1.5 RR'S?

the_merv

iTrader: (88)

You mean 1.6RR's... appx. 15 rwhp, and a full-roller valve train, which is alot better than the standard Stamped Rockers. You will be able to get higher RPMs and build more power when you are up there over the stock ones. That depends on the Cam also...

sdm1234

iTrader: (8)

no he means 1.5 roller rockers. he's asking if there will be an improvement with the rollers instead of the factory stamped rockers.

the_merv

iTrader: (88)

With 1.5's, I would say a more stable and easier moving Valve Train. The 1.6's will open up more power capability.

ls1charged

iTrader: (8)

exactly thank you, so would it be worth it to get the 1.5 RR's or should i pay the extra $ to get 1.6's?

so knowbody has noticed a diff. in idle, or more of a lope?

the_merv

iTrader: (88)

I would get the 1.6's. They really don't change anything with idle..

sdm1234

iTrader: (8)

Get the 1.6RR's only if you plan on getting a cam eventually that will support 1.6's.

ls1charged

iTrader: (8)

its going to be something like a 224/230 cam.

1989GTA

If you have the clearance than by all means the 1.6RR's. Remember lift is your friend when searching for horsepower.

ls1charged

iTrader: (8)

a lil off topic but does anybody know where u can get valve springs tested so i can make sure there rated to what there supposed to be?

Captainofiron

iTrader: (1)

The 1.6 ratio open up the valve usually 30-50 thousandths of an inch more than the 1.5 so its bearly more, it will definitly not affect the sound of your idle, alot of people report a difference in idle because they dont set their valve lash correctly and the poor idle is because of the change in the lash, not the higher lift on the valve.

Captainofiron

iTrader: (1)

You can buy the tool from a speed shop and do it your self or go to a machine shop and see if they have the tool, its called a valve spring tension or pressure tester or if you are looking to see how much the valve goes down then you need a valve spring height micrometer

ls1charged

iTrader: (8)

ahh, thanks

LT1BRN

iTrader: (1)

do the valve covers need to be changed?

Im installing hot cam kit that inclueds the 1.6rr's, do i need to get new valve covers?

94EvilZ28

No you can clip out the inside part of the covers and they will work. No need to buy new ones...