1.8 Rockers With A Z06 Cam

[vj72ct]

hey guys and gals building my 6.0 for my swap and sendin the heads out for some porting and change my springs for a vette z06 cam.i was wondering if i swapped the rockers for 1.8s if i would have any gains?also im using a set of lingenfilter beehive springs they are good for 580 lift i believe and wasnt sure if the rockers would max those out?thanks for the help..VJ

[Jeff@lingenfelter]

hey guys and gals building my 6.0 for my swap and sendin the heads out for some porting and change my springs for a vette z06 cam.i was wondering if i swapped the rockers for 1.8s if i would have any gains?also im using a set of lingenfilter beehive springs they are good for 580 lift i believe and wasnt sure if the rockers would max those out?thanks for the help..VJ

Hi VJ,

You will be about .583 on the intake and .579 on the exhaust lobe. You are right on the borderline, and I would consider going with a set of comp cams 918 springs to be safe. If your heads are going to be ported, the 1.8 rockers wouldn't be a bad way to go. We always recommend doing it with the cam to take the stress off the rockers, but lots of guys go this way.

Jeff

[vj72ct]

thanks for the info Jeff u must have a hell of a job.all those crazy cars u guys build!!one more question what kinda of horspower gain would i see by going with a set of 1.8s??im startin to get cheap on the build cause i wanna do some cosmetic mods to the truck too and have to spread the lil money around

[Jeff@lingenfelter]

thanks for the info Jeff u must have a hell of a job.all those crazy cars u guys build!!one more question what kinda of horspower gain would i see by going with a set of 1.8s??im startin to get cheap on the build cause i wanna do some cosmetic mods to the truck too and have to spread the lil money around

Thanks VJ. Depending the port work in how well it flows, will really compliment the camshaft/rocker combination. My 10,000 foot guess is that with the heads and rockers, you will probably pick up about 20-30 HP. I hope I am wrong and you get a lot more though!

[Smoky02]

Hell that's definitely better having to buy and change the entire cam.

[txarkitekt]

Yeah, but the ratio is only .1 more. Adding rockers will get more lift out of your cam, but only marginally.

What year Z06 cam? You know the 01 is different than the 02+, right?

[dared2k]

Each .1 you go up on rocker size equals roughly 30 thousands lift. Divide your lift by the stock rocker ratio then multiply it by the new rocker size and you should have it

[Jeff@lingenfelter]

Each .1 you go up on rocker size equals roughly 30 thousands lift. Divide your lift by the stock rocker ratio then multiply it by the new rocker size and you should have it

2001 LS6 - 205/212 0.519/0.519 with 1.7 rockers - Lift with 1.8 rockers is .550/.550

2002-2004 LS6 - 204/219 0.551/0.547 with 1.7 rockers - Lift with 1.8 rockers is .583/580

[jetmech]

Each .1 you go up on rocker size equals roughly 30 thousands lift. Divide your lift by the stock rocker ratio then multiply it by the new rocker size and you should have it

Correct you are sir! I think we got a math guy on our hands here

[vj72ct]

thanks for all the info my cam is the 02 up version.