You will surely need new springs!!!
1.8 ratio rockers
Thread Starter
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
1.8 ratio rockers
I've read that there is some power increases to be had by switching to 1.8 ratio rockers. I have a couple of questions on this subject.
Car is a 04 Z06 CE, long tube headers, Vararam CAI, 160 tstat, cat delete, MSD wires, Tune, RevTech catch can. Last dyno was 390 WHP.
1. Can I use original springs and push rods?
2. What power gains could be expected from this?
3. Would a new tune be needed?
4. Any negatives to doing this, or is it just not worth it?
Thanks for any input you guys might have.
Car is a 04 Z06 CE, long tube headers, Vararam CAI, 160 tstat, cat delete, MSD wires, Tune, RevTech catch can. Last dyno was 390 WHP.
1. Can I use original springs and push rods?
2. What power gains could be expected from this?
3. Would a new tune be needed?
4. Any negatives to doing this, or is it just not worth it?
Thanks for any input you guys might have.
Former Vendor
Joined: May 2013
Posts: 290
Likes: 1
1.8 rockers is more of a Small block trick. Small blocks require allot more labor to do a cam swap and the upgraded rockers are a very inexpensive way to get the feel of a larger cam.
Cam swaps on LS1,2,3,4,5,6,7,8,9 is allot simpler. Most times we find that a cam swap costs almost as much as rocker swaps. The final result can get a cam with a grind for your car. That result is better but, for almost the same money as cnc rockers.
Give us a call; we can give you free tech on finding the right cam for your car. 770-919-7774
Cam swaps on LS1,2,3,4,5,6,7,8,9 is allot simpler. Most times we find that a cam swap costs almost as much as rocker swaps. The final result can get a cam with a grind for your car. That result is better but, for almost the same money as cnc rockers.
Give us a call; we can give you free tech on finding the right cam for your car. 770-919-7774
Last edited by Johnny@MTI; Jul 8, 2013 at 03:20 PM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
See below in red One place this modification has yielded some pretty good results is when the rockers compliment the ASA or Hot Cam.
I've read that there is some power increases to be had by switching to 1.8 ratio rockers. I have a couple of questions on this subject.
Car is a 04 Z06 CE, long tube headers, Vararam CAI, 160 tstat, cat delete, MSD wires, Tune, RevTech catch can. Last dyno was 390 WHP.
1. Can I use original springs and push rods?
No, hence the cost when comparing to a cam swap.
2. What power gains could be expected from this?
Maybe 10 hp
3. Would a new tune be needed?
Probably not
4. Any negatives to doing this, or is it just not worth it?
Been there, done that, have the T-shirt. IMO, no, not worth the cost as a stand alone modification
Thanks for any input you guys might have.
Car is a 04 Z06 CE, long tube headers, Vararam CAI, 160 tstat, cat delete, MSD wires, Tune, RevTech catch can. Last dyno was 390 WHP.
1. Can I use original springs and push rods?
No, hence the cost when comparing to a cam swap.
2. What power gains could be expected from this?
Maybe 10 hp
3. Would a new tune be needed?
Probably not
4. Any negatives to doing this, or is it just not worth it?
Been there, done that, have the T-shirt. IMO, no, not worth the cost as a stand alone modification
Thanks for any input you guys might have.
Thread Starter
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
So if I was going to do a cam change at some point in the future would it be ok to do a valve spring and rocker change to the 1.8 ratio now and do the cam at a later time?
Former Vendor
Joined: May 2013
Posts: 290
Likes: 1
think of it this way
1.8 rockers $400 + good springs, retainers, locks and seals- $400 + custom grind cam to adjust for the higher ratio rockers $600. = $1400
or MTI V3 cam with proven hp increases+ springs rockers and seals, a comp camshaft, lock plate, and a fresh gm performance 3 bolt cam gear $1100
you will be spending Less for more performance with just a cam swap.
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Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Instructor
Joined: Dec 2011
Posts: 188
Likes: 0
From: Fredonia Wisconsin
I previously wanted to try this trick and thought about the 8-12 horse
would be a nice addition..I ended up swapping in an EPS 218/226 cam
and picked up roughly 35 ponies with no loss in drivability.
would be a nice addition..I ended up swapping in an EPS 218/226 cam
and picked up roughly 35 ponies with no loss in drivability.