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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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 Posted: Fri Jan 12, 2007 12:48 pm Post subject: |
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| flosho wrote: | Interesting.. so its either 330 now, and 1000 later, or 1000 now...
That kinda sucks I hoping for it to be a direct drop in. How premature are we talking? Like 30000 miles? Even that would be ~2+ years down the road.. |
no idea for certain on how premature, just like, how long will a cam last if you don't break it in properly? ....
But I'm not really willing to test how long, I've got a stage 2 integral camshaft sitting in the closet waiting for those lifters.
Min
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1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Fri Jan 12, 2007 12:52 pm Post subject: |
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Yeah, I don't think it's worth messing around with. We've all seen pictures of catastrophic wear on cab lobes. It's not guaranteed to happen, but if it does you are back at square one.
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Fri Jan 12, 2007 1:24 pm Post subject: |
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Ouch.. 8 lifters, at like ~80 a piece?
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Rasta Monsta
Joined: 12 Jul 2006
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Location: PacNW
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| Posted: Fri Jan 12, 2007 5:01 pm Post subject: |
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yep, cam plus followers=one G
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Sat Jan 13, 2007 1:38 am Post subject: |
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931 stock valves should be hand lapped, never ground according to the factory shop manual.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Sat Jan 13, 2007 1:09 pm Post subject: |
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personally I'll be looking at getting a set of solid lifters, that adjust via shims. They are about a third the weight of the stock item (I have a set for one of my cars sitting waiting for other stuff).
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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Rasta Monsta
Joined: 12 Jul 2006
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Location: PacNW
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| Posted: Sat Jan 13, 2007 4:41 pm Post subject: |
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| Min wrote: | | personally I'll be looking at getting a set of solid lifters, that adjust via shims. |
Could you elaborate?
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simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
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| Posted: Sun Jan 14, 2007 12:24 am Post subject: Lifters |
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Piper make solid lifters, ie the buckets do not have the screw adjustment but use a shim on the valve stem which can be ground to get the correct clearance. I have been told they are very light.
Cheers
Simon
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Sun Jan 14, 2007 2:19 am Post subject: Re: Lifters |
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| simsport wrote: | Piper make solid lifters, ie the buckets do not have the screw adjustment but use a shim on the valve stem which can be ground to get the correct clearance. I have been told they are very light.
Cheers
Simon |
that would be them, have a set out in the garage. Unfortunately last I checked they were out of stock, and I don't honestly know if they are planning on making more. They are very light, and they cost less than stock replacements.
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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Paul
Joined: 02 Nov 2002
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Location: Southeast Wisconsin
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| Posted: Sun Jan 14, 2007 5:50 am Post subject: |
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The new Carrera GT uses this type of lifters on it's 40 valves. To adjust them one must first remove the motor. Then each of 4 cams have to be removed (assuming at least 1 valve under each cam needs a different shim).
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Sun Jan 14, 2007 5:51 am Post subject: |
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Yeah, the fun part would be "adjusting" them at install time, then "adjusting" them again after break-in. . .
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Min
Joined: 04 Nov 2002
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Location: Vernon, British Columbia, Canada
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| Posted: Sun Jan 14, 2007 8:31 am Post subject: |
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| Rasta Monsta wrote: | | Yeah, the fun part would be "adjusting" them at install time, then "adjusting" them again after break-in. . . |
for half the price of the stock item, I'll live.
Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Sun Jan 14, 2007 9:18 am Post subject: |
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Rasta,
I have the Piper followers in my engine. Once they are shimmed up, you're good to go. No need to reshim after a run in, as long as good quality shims have been used.
Regarding the weight issue, they really are super light, but be careful as to their fitment intot he valve sockets. I had to have my follower sockets bored a fraction as the clearences were too tight. As for running the cam in, just run the engine at 2000rpm for 20-30 minutes, and you should be set.
Regards,
Steve |
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Sun Jan 14, 2007 9:19 am Post subject: |
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The advantage to them being lightweight is less stress and ability to rev higher possibly? Is there any other advantage other than cost?
Maybe if we got 5-10 people go in and commit to buy they would do another run of them?
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Sun Jan 14, 2007 9:22 am Post subject: |
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Count me in.
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