Ratio Rockers

Newt Wolfsburg Wizard

478 posts · joined Mar 2008 · 23 Jul 2008, 10:58 pm

#659714

Hi Guys,

Any thoughts on ratio rockers (1.25 or 1.4).

Basically a 2007cc with 40 inlet and 35 exhaust. AP3 cam and a couple of SUs (45mm).

Is there likely to be much bennefit?

Ta

Newt

It is as it is - If you didnt enjoy today, you've missed the opportunity.

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 · 23 Jul 2008, 11:48 pm

#659720

Hi
I know they do make a difference..

1.25 to 1 are fairly common

1.4 to 1 would really open up the valves if you rev Your engine..

If Your cam already opens the valves up more than normal
the 1.25 to 1 should help,,

Lee

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 24 Jul 2008, 6:55 am

#659730

yes there good and cheaper than pulling the engine and fitting a bigger cam

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

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BiX Veteran Volks Folk

2,499 posts · joined Sep 2002 · 24 Jul 2008, 8:35 am

#659749

Make sure the cam you have will take them. I think in most cases 1.25 shouldn't be a problem, but 1.4 with the wrong cam could be an issue.

This is when talking to a good engine builder or a guru (ie dangerous) about cam (duration, lift etc), heads, capacity etc is handy.

But on a stdish motor, 1.25 should be fine and give you a little more flow.

I have no sympathy for my car, only the wallet that pays for it!
Go hard or go home!!!!

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 24 Jul 2008, 8:39 am

#659752

Tell us more about those twin SU's!
We want pics!

The ratio rockers will have more effect with the correct cam,
if your heads have good air flow.
I would consider that area first.

westi wrote:That's mad Alan.

trickysimon 100km/h is only 9 seconds away

1,473 posts · joined Dec 2007 · 24 Jul 2008, 6:46 pm

#659819

What about on a standard 1600DP? Would 1.4 work fine with standard cam or should you only use 1.25s? How much of a gain in hp do ratio rockers actually give?
Simon

Newt Wolfsburg Wizard

478 posts · joined Mar 2008 · 24 Jul 2008, 10:11 pm

#659888

Im confused. How do you upload a 45kb photo.

Though I suspect I will lose all credability with the istalation of twin SU's (though it runs well enough with out flat spots etc - if a little rich on a 1600).

Newt

It is as it is - If you didnt enjoy today, you've missed the opportunity.

Bizarre Moderator The artist formerly known as blue74l

12,785 posts · joined Aug 2002 · 25 Jul 2008, 7:39 am

#659924

trickysimon wrote:What about on a standard 1600DP? Would 1.4 work fine with standard cam or should you only use 1.25s? How much of a gain in hp do ratio rockers actually give?
Simon

Yes - 1.4's work with a standard cam

Futue te ipsum!!!

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 25 Jul 2008, 10:46 pm

#660100

trickysimon wrote:What about on a standard 1600DP? Would 1.4 work fine with standard cam or should you only use 1.25s? How much of a gain in hp do ratio rockers actually give?
Simon

About 2 or 3 hp on a 1600.

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 · 26 Jul 2008, 1:17 am

#660124

I haven't heard of anyone using twin SUs since the old mini coopers were about...

and triumph heralds etc...

do they still make SUs??

small uncomplicated carby compared to others...

Lee

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

bus914 Custom Title Time!

1,230 posts · joined Aug 2002 · 28 Jul 2008, 10:33 pm

#660607

I'm selling a set: forums.aussieveedubbers.com/viewtopic.php?tid=70725

Quote from Aircooled.net aircooled.net/gnrlsite/resource/articles/mods.htm website:

"Install Ratio Rocker Arms: 1-2 hour installation time. If you can adjust valves, you can install these. They MUST be used with shorter pushrods. We recommend 1.4 rockers (which DO work on stock engines). 1.25 rockers give you almost no gain for your work; waste of effort. 1.25's work well with some high performance cam shafts but you have to know what you're doing! 1.4's will really wake up a stock engine, especially if it's a dual port, and if you have additional carburetion."

[img]https://i4.ytimg.com/vi/KOKlJpsfCyk/default.jpg[/img] Click the thumbnail for video👍

vwtyp2 Son of Jim - Creator of Good

2,504 posts · joined Sep 2003 · 29 Jul 2008, 10:06 pm

#660793

can help you out with a set of 1.4 autocraft type 1 rockers if you're looking to buy some.
I was gonna use them, but could use the cash elsewhere on my project.

Most people seem normal, till you get to know them.