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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 12-18-2009, 07:55 PM   #21
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I believe they are 1.6:1 and not roller.
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Old 12-18-2009, 09:35 PM   #22
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The stock timing chain:
http://www.zzperformance.com/grand_p...ts1.php?id=119

Sometimes people on ClubGP.com buy these stock chains but then realize they should use double rollers. I got mine used with 10K on it for a total of $15 with shipping. You should expect shipping plus $15 for one that isn't used.

The stock rockers are simply smooth on the bottom, and they glide over the valve stems. No one so far has evidenced that this slows down our cars, but it is sort of understood that deflection may bring them down into the mid-1.5s or lower. Aluminum 1.6 roller rockers are said to deflect much less, so hardcore stock rocker enthusiasts may splurge on those every now and again.

And Bill, please no more boxes!
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Old 12-18-2009, 11:58 PM   #23
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apparently ZZP heard soap box. It'* now $37
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Old 12-19-2009, 12:02 AM   #24
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You can get a never-used chain for $15, as long as it'* GM stock, but if you get the same thing in aftermarket form, it'* about $50 then. Just have to buy online but away from ZZP. I'll try to go find one for you out on ClubGP. Their sale section is just way too large.
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Old 12-19-2009, 12:04 AM   #25
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yeah I've been searching defiantly going for the stock change
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Old 12-19-2009, 12:27 AM   #26
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This is the first time I have won a forum debate!

I feel so happy I could almost just mail you a stock replacement chain.... Almost...
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Old 12-19-2009, 12:35 AM   #27
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y6u feel a big difference with the L67 TB and 26 UIM?
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Old 12-19-2009, 01:00 AM   #28
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Yes, it simply feels more correct. The L26 UIM is very nice for looks and durability, too. The main things I like are that the L26 UIM has a longer "snout" to the TB, plus it needs an L67 to Gen V M90 adapter plate. That with an L67 throttle body is a pretty nice setup. It'* expensive though. The adapter plate is about $100 if you buy it new, though I'm sure ClubGP'* insane sale section should come through. I'm not advertising the forum, just the sale section. I have all my forums bookmarked to go the front page, except ClubGP'* bookmark takes me straight to the classifieds.

I think in all this mess I forgot to recommend going to an L67 throttle body. Look inside your throttle plate. It'* crazy! It'* a bent plate so that it'* over 1/4" thick even at WOT. The L67 version has a much larger opening that is also pretty much perfectly round, and the throttle plate is very thin and flat. For starters, you could pick up an L67 TB and see if you can make it fit on your UIM, cutting a larger hole as you go. If you find that it'* much easier to pick up an L26 and adapter plate setup, go for it then. That way could save you money, mostly over how the L36 & L67 share the same TB bolt pattern.
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Old 12-19-2009, 03:47 PM   #29
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sweet are teh sensors the same I found a 67 with no sensors can I use my 36 sensors?
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Old 12-19-2009, 08:59 PM   #30
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You could easily transfer over your TPS and IAC. The MAF sensor should transfer over, but still you would have to tune the car for it because of the larger opening around the sensor.
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