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Author Topic:   Roller Rockers
19J
Dirt Freak

Total posts: 370
posted March 28, 2005 04:58 PM  
I got a set of roller rockers. And 8 are 1.5 and 8 are 1.6 what is the advantages of this and when ordering a cam should you tell them this or does it matter?

leapinlizard
Dirt Freak

Total posts: 402
posted March 29, 2005 07:54 AM  
Yes to all of the above.

mod99l
Dirt Roller

Total posts: 12
posted March 29, 2005 08:39 AM  
The advatage of using 1.6 rocker arms is it will give you more valve lift

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 29, 2005 09:01 AM  
run the 1.6 on the intake for faster valve motion and more lift, helps with cylinder filling.

And yes you should let them know when ordering a cam.

Istock66
unregistered Total posts: 2007
posted March 29, 2005 01:21 PM           send a private message to dirtbuster   Edit/Delete Message   Reply w/QuoteBBBBBB
As mentioned above the higher ratio the faster the valve is off the seat.

camcraft prefers 1.7/1.6 on limited carb motors.

19J
Dirt Freak

Total posts: 370
posted March 29, 2005 01:36 PM  
So which is better 16 1.6 or 8 and 8?????? Whats the advantages of running half and half over just all 1.6? Thanks.

waltonjr1
Dirt Forum Champ
Total posts: 516
posted March 29, 2005 03:15 PM  
Its not always an advantage. It could hurt performance, depends on your cam specs and what your trying to do.


Ego Racing
Dirt Forum Champ
Total posts: 724
posted March 29, 2005 04:33 PM  
When We drag raced we ordered two sets and played around on the motors with them. It seemed like the motors liked there own things. We ran three motors with the same cam, bore, rods, heads and pistons and all seemed to prefer something else. We had one motor that loved 1.5 intakes and 1.6 Exh on the inside cylinders and 1.6 intakes and 1.6 exhaust on the outside cylinders. When we started to run oval we would got the drag strip every year to tune the motor. Start at the same RPM run it up to the RPM you are going to race at and let off. It would let us mess with little things that you don't have time to at the track.
They look at you funny to until you start running them down at half track.

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