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Old 07-07-2004, 00:22   #1 (permalink)
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Rocker cover gasket with 1.7 roller rockers

I wanna whack some 1.72 roller rockers on my AU at some stage down the track. I was wondering what Gasket have you used afterwards as you need extra clearance right? ALso was there much gain to be had from just fitting the roller rockers? I'm thinking go rockers now and get a cam later instead of saving up for both.
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Old 07-07-2004, 00:28   #2 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

I used my original rocker covers with YT rockers and a 2031 cam, and one rocker did hit.
I installed some valve cover gaskets ( 5/16 thick SCE136076) from www.highperformanceworld.com.au ,worked a treat.
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Old 07-07-2004, 05:43   #3 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

Yep they often hit oil baffle which needs to be taken out or changed somewhat..
An aftermarket alloy such as Edelbrock are o/k... Carefull going with too tall covers as some don't fit under inlet manifold...
The advantage of 1:72 r/rockers is rocker ratio and better valve guide life[set up right]...There are realy no other performance gains like less friction. Yes there is less but imo not enough to notice...They are stronger and more reliable.. Especially the shaft/ stud type...
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Old 07-07-2004, 06:43   #4 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

My YT 1.72 rockers didnt touch the oil baffle, but one did rub against the top of the cover, which sounded like a freight train on start up and I crapped me dax, as I thought I had no piston to valve clearance for a sec after the cam change...learned a lesson there.
I do understand that some rockers do hit the oil baffle and this can be modified for clearance.
The 1.72 rocker upgrade is one of the easiest performance upgrades. It makes the stock cam act bigger with more lift ect, with out doing a cam change. And the stock cams profile is pretty good for a near stock motor.
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Old 07-07-2004, 07:19   #5 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

So is it worth doing the roller rockers now and then do a cam later on or just do the cam and roller rockers all at once? I just want a little bit more oomph as I'll probably be a while before i do a cam as I don't have the cash.
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Old 07-07-2004, 07:29   #6 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

So just do the rockers then. A cam change means Gaskets, Timing chain, Valve springs etc, etc.And a lot more labour!
The rockers are the easy way out, and as you have an auto, the 2031 crane cam would be an ideal choice for a cam later on, as it is for 1.7 rockers (but there are other cams for 1.7's too).
Try VPW, they did have a good price for the YT 1.72 rockers.
http://www.vpwmailorder.com.au/ieframeset.html
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Old 07-07-2004, 18:34   #7 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

How much power could you gain out of just the roller rockers on the stock engine? 4-5rwkw?
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Old 07-07-2004, 21:50   #8 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

Quote:
Originally Posted by Cobra
So is it worth doing the roller rockers now and then do a cam later on or just do the cam and roller rockers all at once? I just want a little bit more oomph as I'll probably be a while before i do a cam as I don't have the cash.
The rocket cover gasket is rubber. Its not that necessary to replace it. Just make sure your orginal gasket is still in tach. If its cactus, then id replace it. I left my original one on. Go for the rockers mate. Should take you an afternoon to fit. Your gonna need to remove the alternator as the cover wont come off on the R/H side
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Old 07-07-2004, 22:00   #9 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

Or its the rubber laminated Steel version.. Just dont ask ford how much they charge for a new one Im not kidding..
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Old 07-07-2004, 23:45   #10 (permalink)
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Re: Rocker cover gasket with 1.7 roller rockers

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Originally Posted by MustangNicko
How much power could you gain out of just the roller rockers on the stock engine? 4-5rwkw?
Yell Terra claim 10% more power. The rocker ratio moves up from 1.5 or 1.6 to 1.72 and makes the CAM act like it's bigger than it is. Apparently, well worth the effort.

Do AU1 XR8's (185kw version) come with 1.7 ratio rockers in the first place - I thought they did. perhaps not - perhaps this is one of the differences between the AU1 and AU2 motors???
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