Seeing more ST knock on stock tune versus diablo tune - Page 2 - Cherokee SRT8 Forum
WK2 SRT8 Tuning/CMR/Dyno/DataLogging/Gauges This section is for all WK2 SRT8 specific discussions related to hand held tuners, CMR tuning, Dyno tuning, Data Logging & Gauges.

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post #11 of 32 (permalink) Old 12-25-2012, 10:45 AM
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How does the catch can help with the knock?


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post #12 of 32 (permalink) Old 12-25-2012, 10:47 AM
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How does the catch can help with the knock?


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Catches excess oil from getting into the heads and cylinders


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post #13 of 32 (permalink) Old 12-25-2012, 10:55 AM
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From my understanding oil induced into the cylinders lowers the o fans rating of your gasoline and hence increased knock. The goal is to reduce the amount oil induced into the cylinders.

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post #14 of 32 (permalink) Old 12-25-2012, 07:15 PM
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Catches excess oil from getting into the heads and cylinders


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What he said /\


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post #15 of 32 (permalink) Old 12-31-2012, 06:45 AM
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I pulled off as a unit the pvc hose,metal tube and the 90 degree rubber fitting where it goes into the manifold and there was NO oil at all in the metal tube or even in either rubber fittings and the jeep has 6200 miles on it. Im just wondering if the 6.4 WK2 PVC unit is a lot better than the 6.1? I did order a BT catch can just to be on the safe side. You have to remember that the 6.4 has a higher compression raito than the 6.1 ( 6.4 10.9 to 6.1 10.3) and like us in CA we only have 91 octane with 1.8% oxy.

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post #16 of 32 (permalink) Old 12-31-2012, 07:06 AM
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I catch quite a bit Jim, I wouldnt say as much as my 6.1 but close.


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post #17 of 32 (permalink) Old 12-31-2012, 07:19 AM
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I catch quite a bit Jim, I wouldnt say as much as my 6.1 but close.
Well thats why i ordered my catch can just to be on the safe side. You have to remember im a lot older than you JOHN so i drive a looooooooooot slower lol.
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post #18 of 32 (permalink) Old 12-31-2012, 07:28 AM
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Well thats why i ordered my catch can just to be on the safe side. You have to remember im a lot older than you JOHN so i drive a looooooooooot slower lol.
Your not fooling anyone, maybe with your grand kids in the car you do...haha
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post #19 of 32 (permalink) Old 12-31-2012, 09:42 AM Thread Starter
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Ordered my catch can from billet this past week. Will see how long it takes to get here. Vehicle did fine on the trip back. Only saw knock about as high as 3.5 or 4. I've got a little over 10,000 miles on the rig. Would it be a good idea to clean the manifold and throttle body once I go to install the cc?
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post #20 of 32 (permalink) Old 12-31-2012, 09:57 AM
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I installed my catch can at like 20 miles and was catching oil with the WK2. I get about a 3/4 full can every oil change around 3-4,000 miles. 21k miles on the rig now.


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