User Login    
 + Register
  • Main navigation
Login
Username:

Password:


Lost Password?

Register now!
Fast Search
Slow Search
Google Ad



Browsing this Thread:   1 Anonymous Users





do roller rocker arms add HP +++++ ?
Home away from home
Joined:
2008/3/30 12:52
From RSA
Group:
Registered Users
Posts: 387
Offline
I was watching engine masters and saw this test and saw this https://youtu.be/TvQHgt-tF7Y The two alu rockers were different ratios and produced diff results so how do you know what the correct ratio is for your A series. Just by the way there was also this https://youtu.be/8VjFZMKvEwY How does the rocker ratio and cam /cam lift etc work together? I see yellaterra also has diff ratio's

Posted on: 2018/1/8 13:21

Edited by nismo1 on 2018/1/8 16:04:49
Transfer the post to other applications Transfer


Re: do roller rocker arms add HP +++++ ?
Home away from home
Joined:
2011/1/31 2:06
From melbourne
Group:
Registered Users
Posts: 804
Offline
A 1.5:1 rocker will move a valve 1.5 times the lift of the cam. A 1.6:1 rocker / 1.6 times which equates to roughly a 5 to 6% increase in valve lift thus gaining a few extra hp. Dont think it affects duration but do put less load on the valve and add to longevity / friction.. Worth it ?? Just depends on engine setup and how you value your motor. A-series have a pretty tough rocker from factory. I am using them which needed a higher tower. My motor is not fully assembled yet so no testing too.

Posted on: 2018/1/8 17:49
Transfer the post to other applications Transfer


Re: do roller rocker arms add HP +++++ ?
Home away from home
Joined:
2008/3/30 12:52
From RSA
Group:
Registered Users
Posts: 387
Offline
So if i understand you,you also using roller rockers.If i may ask where did you get them cos i see there is quite a few places that sell them.

Posted on: 2018/1/8 18:43
Transfer the post to other applications Transfer


Re: do roller rocker arms add HP +++++ ?
Home away from home
Joined:
2008/3/30 12:52
From RSA
Group:
Registered Users
Posts: 387
Offline
Check this out a DIY head job making 92hp more than std. Extra large intake by making changes to the head ---How they change the pushrods then? https://youtu.be/aijyLKCvbU8

Posted on: 2018/1/8 18:49
Transfer the post to other applications Transfer


Re: do roller rocker arms add HP +++++ ?
No life (a.k.a. DattoMaster)
Joined:
2002/8/11 8:22
From Perth
Group:
Registered Users
Posts: 2689
Offline
I run rollers
I get alot more lift from them as I run 1.65 ratio
However... the rocker is heavier... so I don't rev it as hard and try to keep my redline around 7600
People with std rockers can run higher rpm... but I get alot more valve lift and airflow than most

Mine are yella terra
Don't think you can get them anymore unless special order

Posted on: 2018/1/9 11:50
Transfer the post to other applications Transfer






You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.

[Advanced Search]