[austin]

Hi,

Is anyone using these? It says the 1.8 ratio rockers add 20hp.... But they bring the the valve lift to .550... This concerns me as the stock valve springs description reads "max lift .520".. Seems like they would be hard on the stock springs & pushrods, and possibly cause valve float, early valve spring fatigue and perhaps bent pushrods. Has anyone installed them and then dyno tested afterwards. If so, how are they holding up, what were the actual hp/trq gains?

They look simple enough to instal, but he mentions two different torque settings for the bolts which is confusing... He also doesn't mention torquing at TDC, which is further confusing?

https://www.youtube.com/watch?v=Z9zE1dJ-kSQ

 

[Ross L]

Yes, confused me too. But I'm easily confused. The 1.85 rockers *could* be a nice upgrade for a little more top end.

 

[Da V-Man]

If you're putting 1.85 rocker arms on the stock cam, the resulting lift will be 0.522", not 0.550". The factory cam has 0.480" lift.

 

[austin]

If you're putting 1.85 rocker arms on the stock cam, the resulting lift will be 0.522", not 0.550". The factory cam has 0.480" lift.

Mmmmmm..... Well wait4me's rockers as advertised as 1.8 not 1.85... So I guess the lift will be slightly less, but now are they considered safe to use? How can someone with a lot of CTS-V experience come up with .550 for the total lift with 1.8 ratio? The video just seems too confusing.. Not even a mention of proper valve cover torque at the end. I tried to pm wait4me but his mailbox won't accept messages at this time.

 

[Da V-Man]

Mmmmmm..... Well wait4me's rockers as advertised as 1.8 not 1.85... So I guess the lift will be slightly less . . .

0.508"

 

[Tedboss1]

Have look at the past threads on this topic:
http://www.cadillacforums.com/forum...cussion/197219-1-85-rocker-arm-questions.html
http://www.cadillacforums.com/forum...question-wait4me-jesse-about-rocker-arms.html
http://www.cadillacforums.com/forum...ssion/218484-have-set-slp-1-85-rockers-2.html

 

[wait4me]

Sorry old thread, The rockers I had where 3 different types. I had 1.8s, 1.85s, 1.9s, Depending on what the customer wanted for final lift.

For lift values on the camshaft from the lsa engine:
1.7 ratio = .480
1.8 ratio = .508
1.85 ratio = .522
1.9 ratio = .536

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That video was just for people to get the idea of what to do several years back. There are tons of videos out there that are more indepth. The rockers also came with exact instructions, including how to tighten them down and torque specs. Including the order for tightening them and where to put the crank for them to be in the down position. In the video I had set it already, and just didn't mention it. That is why I only put on the first one.

I was in a hurry making that.

As for horsepower before and after, When we tested several cars with no other changes, they all where in the 16-18rwhp gains with the 1.85 ratio rocker and stock springs.

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Back in early 09, I was told that the stock cam was in the 510 lift range stock, which is why I always quoted 550 range numbers on lift, It took half of that year before I finally stuck a stock cam in the camdoctor to see what it actually was. Then I corrected the numbers from then on out..

 

[austin]

Sorry old thread, The rockers I had where 3 different types. I had 1.8s, 1.85s, 1.9s, Depending on what the customer wanted for final lift.

For lift values on the camshaft from the lsa engine:
1.7 ratio = .480
1.8 ratio = .508
1.85 ratio = .522
1.9 ratio = .536

----------

That video was just for people to get the idea of what to do several years back. There are tons of videos out there that are more indepth. The rockers also came with exact instructions, including how to tighten them down and torque specs. Including the order for tightening them and where to put the crank for them to be in the down position. In the video I had set it already, and just didn't mention it. That is why I only put on the first one.

I was in a hurry making that.

As for horsepower before and after, When we tested several cars with no other changes, they all where in the 16-18rwhp gains with the 1.85 ratio rocker and stock springs.

----------

Back in early 09, I was told that the stock cam was in the 510 lift range stock, which is why I always quoted 550 range numbers on lift, It took half of that year before I finally stuck a stock cam in the camdoctor to see what it actually was. Then I corrected the numbers from then on out..

Thank you for replying... So 1.8 seems very safe for the stock springs and 1.85 is close but still under the max lift, although just barely.. Which ones do you recommend.. 1.8 or 1.85.. Will 1.85 cause valve float or kill the stock springs, retainers etc. What is the cost difference between your 1.8/1.85 kits?