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Thread: 20V catastrophic failure

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Posts: 11-20 of 22
2016-12-28 18:44:49
#11
Originally Posted by Agent
I hope this was user era because im boosting mine with a stock bottom end.


You should probably seek out a mechanical timing chain tensioner.
2016-12-28 19:58:46
#12
I this necessary with stock 20v valve train?
2016-12-28 20:25:06
#13
Originally Posted by Agent
I this necessary with stock 20v valve train?


I would say it depends on the amount of power you are wishing to get out of the setup. I see more failures with the great number of HP and TQ values. Staying around stock levels? I would use the stock tensioner, unless I am racing or the purpose of the engine will be to live in WOT, full power all day. I hope some others could chime in.
2016-12-30 11:37:33
#14
I plan on keeping it between 350 and 400whp. Im aware of the paper thin pistons, so I will be using water meth when not on e85. Also going to do my best to drive it responsibly. revving to 8200
2016-12-30 14:21:35
#15
I like the stock tensioners, they are not a known failure mode on FWD or RWD setups making all sorts of power. The only thing I'd do is make sure oil gets to the engine, and maybe hunt down a tensioner with the finer teeth. I think the later the engine, the finer the teeth they had. The 20V timing chain is a completely different beast though, so I don't have details there.
Last edited by BenFenner on 2016-12-30 at 14-24-41.
2016-12-30 14:40:40
#16
Originally Posted by Agent
I plan on keeping it between 350 and 400whp. Im aware of the paper thin pistons, so I will be using water meth when not on e85. Also going to do my best to drive it responsibly. revving to 8200


They are actually pretty thick compared to some pistons. With ethanol I don't think there would be any problems at all. On meth just don't run out, we did that once already and cracked ringlands... Now crappy paper thin pistons are in my Jeep Liberty, Kenne Bell made a blower for it then scrapped the whole project because they couldn't put even 5psi to them. Heck the pistons are failing in N/A stock vehicles! haha crossing fingers because I'm at 90k on mine
2016-12-30 16:05:49
#17
how many psi you running on what turbo? What size turbine housing?
2016-12-30 18:22:23
#18
On the cracked ringlands we were running a GTX3071R tial vband .64 and 24psi. We are just going to run E85 to be safe on the next one and if we use the sprayer again we will just use it for water cooling. I would love to measure and weigh out RR/VE/20V pistons. If I get a set of them out one day I'll probably start logging the info. I find it amazing that we can break 400whp on cast pistons and it last more than a few pulls I know my stock DE @ 26psi was damn close to 400 and probably would have still been kicking if the FPR line didn't fail on me. When I took it apart the pistons were perfect but the connecting rod small ends were showing signs of heat even with water/meth spray. Maybe if it had oil squirters it would have helped cool them better on the bottom side. (Don't know still learning crap about these engines)
2017-01-15 23:16:57
#19
I made 406 whp 297tq on 19psi. E15( 93pump mixed with e85) on 3076r. Gonna turn it down to 12psi to make it last
2017-01-15 23:20:19
#20
.63 ar turbine housing
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