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Common Piston Failures. http://www.youtube.com/watch?v=Q1mRCNmYmGM

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Old 03-12-2018, 10:49 PM   #61 (permalink)
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Common Piston Failures.

http://www.youtube.com/watch?v=Q1mRCNmYmGM
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Old 03-13-2018, 02:54 AM   #62 (permalink)
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What a great video. Learned something new, now I have question I can ask
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Old 03-13-2018, 08:10 AM   #63 (permalink)
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Yeah, good videos.
A question that I have (and probably tight lip info per engine builder) is ring gap setting.
As the oem VQ37VHR has a ring gap of .0091” on 1st & 2nd ring.
As the VQ isn’t normally boosted & looking over boosted recommendations of similar engines, such as a VR38DETT, ring gap setting on e85 is (bore x .005) 1st & second rings- up to 15lb boost & (bore x .006) 15-30lb. That’s (.018-.022) on 1st & 2nd rings.
Make you wonder how boosting stock bottom ends & making big power over long periods of time is capable...engine must be very forgiving.
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Old 03-13-2018, 08:38 AM   #64 (permalink)
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I am looking for info on a closed deck block. The benefits and pitfalls. Maybe I can find something good here also.
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Old 03-13-2018, 08:47 AM   #65 (permalink)
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I am looking for info on a closed deck block. The benefits and pitfalls. Maybe I can find something good here also.
There are few good videos on line. I did a search a couple of years ago. If nothing else there is a reason GTR motors are closed deck from the factory. Maintaining cylinder bore tolerances/block strength and heat dissipation are couple of reason in my memory serves me well this morning. Hopefully I'm not have one of my moments again lol.
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Old 03-13-2018, 09:29 AM   #66 (permalink)
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Need phunk to chime in. He would have the answers most likely.
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Old 03-13-2018, 09:10 PM   #67 (permalink)
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Old 03-13-2018, 10:12 PM   #68 (permalink)
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What compression ratio was your engine?
I have built both a 9:1, and an 11:1 comp ratio engine for my car now. Spent 3 years running down the 3.7L open deck block record at 850whp on my 9:1 engine. I tried literally everything. Different head gaskets, thicknesses, gasket coatings, clamping loads, had the heads O-ringed(final engine was a culmination of the three.). 8 head gasket sets, 2 blocks, and 8 connecting rods later I called it quits July of Ď17; when I lost another head gasket set after the dyno in may. Finally broke down, and invested in a closed deck block. Wasnít until I took a stone to my old deck surface that I realized the there indeed are very noticeable high and low spots that form from cylinder expansions that are happening under high boost pressures. At the end of the day Iím telling you, one memeber to another, I donít care who says what or what they think they know; your car WILL blow head gaskets over 800whp if you choose not to support the cylinder from shifting in some shape or form. 1Life the dynosty built haltech car did it at 820whp which is why he had his engine rebuilt, and purposefully turned back to 780-790.

FYI Charles is not looking to push Justinís built car without some sort of cylinder reinforcement(whether that be dowels, inserts, or a block fill time will tell); they are merely using Justinís car as a test bed to run the GTR head bolts which are currently being used on R35s well into the 12-1300whp realm. Not too bad considering the set of 16 can be bought for less that $100.
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Old 03-13-2018, 10:41 PM   #69 (permalink)
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That's some nasty gas cutting there. Wonder where the line was before needing cylinder reinforcement.
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Old 03-13-2018, 11:36 PM   #70 (permalink)
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Rid3_Famous, that is exactly what I needed. Data. Guess I will be opting for a closed deck block.
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Old 03-14-2018, 12:28 AM   #71 (permalink)
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Rid3_Famous, that is exactly what I needed. Data. Guess I will be opting for a closed deck block.
It's insurance. Why take chances for your power level.
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Old 03-14-2018, 12:52 AM   #72 (permalink)
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It's insurance. Why take chances for your power level.
Rabbit hole.

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Old 03-14-2018, 01:09 AM   #73 (permalink)
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Rabbit hole.

.
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Old 03-14-2018, 02:06 AM   #74 (permalink)
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Originally Posted by Rid3_FaM0uS View Post
I have built both a 9:1, and an 11:1 comp ratio engine for my car now. Spent 3 years running down the 3.7L open deck block record at 850whp on my 9:1 engine. I tried literally everything. Different head gaskets, thicknesses, gasket coatings, clamping loads, had the heads O-ringed(final engine was a culmination of the three.). 8 head gasket sets, 2 blocks, and 8 connecting rods later I called it quits July of Ď17; when I lost another head gasket set after the dyno in may. Finally broke down, and invested in a closed deck block. Wasnít until I took a stone to my old deck surface that I realized the there indeed are very noticeable high and low spots that form from cylinder expansions that are happening under high boost pressures. At the end of the day Iím telling you, one memeber to another, I donít care who says what or what they think they know; your car WILL blow head gaskets over 800whp if you choose not to support the cylinder from shifting in some shape or form. 1Life the dynosty built haltech car did it at 820whp which is why he had his engine rebuilt, and purposefully turned back to 780-790.

FYI Charles is not looking to push Justinís built car without some sort of cylinder reinforcement(whether that be dowels, inserts, or a block fill time will tell); they are merely using Justinís car as a test bed to run the GTR head bolts which are currently being used on R35s well into the 12-1300whp realm. Not too bad considering the set of 16 can be bought for less that $100.
I think we are all interested in phunks experiment.
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Old 03-14-2018, 04:02 AM   #75 (permalink)
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We have theories and ideas. None of it is worth more than anyone else's until it is accomplishing something.

I am not opposed to the closed deck conversion. I might prefer to try it with the support structure resting a bit below the deck rather than right at it.

I believe that there is a problem deeper in the block, literally. Cutaways of a VQ demonstrate IMHO some concerning lack of girth and doubt about its ability to hold its shape under extreme torsional loads. There is no limit to what can be done to address it, but the real question is, how little can we get away with?
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