Vidar Posted May 12, 2023 Report Share Posted May 12, 2023 have a customer here who realy want sandig still launch controll with pops and bang. whe have tried earlier, resulting in valve lifters/shim came off. no its standing on fuel cut, with -5% retard ignition. but customer thinks its a little boring. so any god suggestion on lunch controll/two step setting that will not destroy walve lifters and cam. eninge is 2jz, built bottom end, bc 264 cams, non vvti, garret gtx3584rs gen 2 turbo, link 1000cc injectors, link g4 supralink. dyno is 620whp on 1.5bar in boost.. boost is 1,5bar at 4000rpm and stable to 8000rpm. no adjustment on cam gears. valve lifters are with shim on top btw. Quote Link to comment Share on other sites More sharing options...
koracing Posted May 12, 2023 Report Share Posted May 12, 2023 Convert to shimless bucket maybe? I usually set to an absolute timing value (-5deg as a start) but I also don't usually do it on stock valvetrain. Quote Link to comment Share on other sites More sharing options...
Vidar Posted May 13, 2023 Author Report Share Posted May 13, 2023 my suggestion too customer was shimless bucket. but has anybody had a success with a noisy(what customer want) 2step/launch controll that dont grenade valvetrain? Quote Link to comment Share on other sites More sharing options...
dx4picco Posted May 13, 2023 Report Share Posted May 13, 2023 noisy = explosion, explosion most likely = banging valves open, =floating lifter and jumping shims. I guess there are no 2 ways about it Quote Link to comment Share on other sites More sharing options...
Vidar Posted May 13, 2023 Author Report Share Posted May 13, 2023 then shimless is way too go. if there is stock buckets, fuel cut is best thing... Quote Link to comment Share on other sites More sharing options...
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