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Roller Rockers for 6

Started by _gtrtorana_ , Aug 15 2006 11:21 AM

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12 replies to this topic

#1 _gtrtorana_

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Posted 15 August 2006 - 11:21 AM

I'm thinking of placing YT bolt on 1.5 roller rockers to my Torana and was just wondering would I expect to feel an improvement in performance or will it just be a reliability improvement as I have snapped a few std rockers.

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#2 _draglc_

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Posted 15 August 2006 - 01:58 PM

You def wont snap any, well depends what rpm your always driving at!

Better valve response, i beleive therefore a cleaner, crisper sounding head. If theres no hp gain from that ill eat my hat!

Also the ability to rev the engine higher and harder, with more reliability.
Def worth getting!

A1

Edited by draglc, 15 August 2006 - 01:58 PM.

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#3 _Aquarius - LC_

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Posted 15 August 2006 - 02:14 PM

^^ I second Andrews comments !
Engine will be Quieter & smoother aswell

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#4 boomfunk

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Posted 15 August 2006 - 02:44 PM

yeah i would say they do seem to make it run better, AND if you have a solid cam its a needed part having roller rockers....

too say they dont break um well they do, ive never broken one but people do

i was at a dyno on the w/end and he broke 2 and 4 the other day so yeah, by the way it was a 1300hp machine, he was up to 850hp at the wheels then bam it broke

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#5 _gtrtorana_

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Posted 16 August 2006 - 07:36 AM

Sold. Thanks for all your advice. Will hopefully purchase some at the Yella Terra sale in 2 weeks.

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#6 TerrA LX

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Posted 16 August 2006 - 11:56 PM

fyi if your rocker ratio is around 1.6 atm then going to 1.5 you may seea decrease in performance.
rocker ratio should be an important conciteration when upgrading.

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#7 _gtrtorana_

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Posted 17 August 2006 - 07:51 AM

I have the std rockers at the moment, not sure what ratio they are but I gather they would be 1.5. They are the adjustable ones to suit 186. Can anyone confirm the std ratio?

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#8 warrenm

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Posted 17 August 2006 - 08:21 AM

Std rocker ratio for a Holden 6 is 1.5:1.

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#9 _gtrtorana_

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Posted 17 August 2006 - 08:38 AM

Thanks for that. So if thats the case, the ratio will be the same for the rollers to the original rockers.

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#10 Litre8

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Posted 17 August 2006 - 12:22 PM

Are you running a big cam? Have you tried to work out why you currently break the standard rockers? Is the valve train geometry correct?

I went through this same exercise in 1975, kept on breaking standard rockers, so I put on a set on Crane rollers. Then I started breaking studs.... If the head has been machined/surfaced or you are running a big cam with standard springs then you may be getting geometry issues or coil bind.

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#11 _gtrtorana_

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Posted 17 August 2006 - 12:46 PM

I am running a big cam, I have a YT head and have checked for spring bind and found nothing. Motor revs to 6700rpm so I think that may be an area that roller rockers would help in.