W124 build
W124 build
05-15-2018, 01:23 AM
#102
(04-24-2018, 01:21 PM)whipplem104 Well rough bit finally hit. Prechamber dropped the tip off and damaged the piston and bent a valve but upon disassembly all the rods appear to be bent. Slight scuffing on the cylinders from side load. Overall I am super impressed it has lasted this long. Even though the miles have not been many. All of them have been at near fulll throttle. So I was thinking about 3-4 tanks of fuel. So around a 800-1000 miles of full tilt. Either dyno testing or track time. And quite a few around the blocks.
Looking at solutions for the problems. Maybe redo piston rod profile and looking into some options on prechambers from coating to new design.
I think you may just want to lower the compression to reduce the peak cylinder pressure. 21:1 is a lot to multiply 40psi by. Maybe just buy some slightly shorter autoverdi rods or similar; lots of places seem to sell them. Perhaps shoot for 16 or 17 to 1.
Seems like timing is pretty important on the whole peak pressure thing also. Can't recall where you were set on the start of injection with your pump.
And aren't the prechamber failures usually due to leaky injectors?
This post was last modified: 05-15-2018, 01:28 AM by atypicalguy.
atypicalguy
05-15-2018, 01:23 AM #102(04-24-2018, 01:21 PM)whipplem104 Well rough bit finally hit. Prechamber dropped the tip off and damaged the piston and bent a valve but upon disassembly all the rods appear to be bent. Slight scuffing on the cylinders from side load. Overall I am super impressed it has lasted this long. Even though the miles have not been many. All of them have been at near fulll throttle. So I was thinking about 3-4 tanks of fuel. So around a 800-1000 miles of full tilt. Either dyno testing or track time. And quite a few around the blocks.
Looking at solutions for the problems. Maybe redo piston rod profile and looking into some options on prechambers from coating to new design.
I think you may just want to lower the compression to reduce the peak cylinder pressure. 21:1 is a lot to multiply 40psi by. Maybe just buy some slightly shorter autoverdi rods or similar; lots of places seem to sell them. Perhaps shoot for 16 or 17 to 1.
Seems like timing is pretty important on the whole peak pressure thing also. Can't recall where you were set on the start of injection with your pump.
And aren't the prechamber failures usually due to leaky injectors?
Messages In This Thread
W124 build - by whipplem104 - 04-30-2015, 06:38 PM
RE: W124 build - by raysorenson - 04-30-2015, 08:27 PM
RE: W124 build - by Repetitio - 05-01-2015, 02:19 AM
RE: W124 build - by whipplem104 - 05-01-2015, 10:35 AM
RE: W124 build - by whipplem104 - 05-04-2015, 06:03 PM
RE: W124 build - by whipplem104 - 05-06-2015, 08:10 PM
RE: W124 build - by maxypriest - 05-06-2015, 09:46 PM
RE: W124 build - by whipplem104 - 05-06-2015, 11:31 PM
RE: W124 build - by whipplem104 - 05-07-2015, 01:46 PM
RE: W124 build - by raysorenson - 05-07-2015, 08:16 PM
RE: W124 build - by whipplem104 - 05-08-2015, 02:02 PM
RE: W124 build - by whipplem104 - 05-25-2015, 11:00 PM
RE: W124 build - by Hario' - 05-26-2015, 07:33 AM
RE: W124 build - by whipplem104 - 06-19-2015, 06:33 PM
RE: W124 build - by Turbo - 06-22-2015, 01:13 AM
RE: W124 build - by whipplem104 - 06-30-2015, 06:43 PM
RE: W124 build - by whipplem104 - 07-01-2015, 08:09 AM
RE: W124 build - by Hario' - 07-01-2015, 11:41 AM
RE: W124 build - by whipplem104 - 07-02-2015, 07:25 PM
RE: W124 build - by whipplem104 - 07-02-2015, 07:38 PM
RE: W124 build - by raysorenson - 07-03-2015, 09:10 PM
RE: W124 build - by whipplem104 - 07-04-2015, 06:15 AM
RE: W124 build - by whipplem104 - 07-22-2015, 03:36 PM
RE: W124 build - by Booster - 07-23-2015, 01:50 AM
RE: W124 build - by whipplem104 - 07-23-2015, 06:32 PM
RE: W124 build - by whipplem104 - 07-28-2015, 02:52 PM
RE: W124 build - by Turbo - 08-11-2015, 02:35 PM
RE: W124 build - by whipplem104 - 08-11-2015, 05:31 PM
RE: W124 build - by whipplem104 - 08-27-2015, 12:43 PM
RE: W124 build - by whipplem104 - 10-03-2015, 02:02 PM
RE: W124 build - by whipplem104 - 10-04-2015, 06:08 PM
RE: W124 build - by whipplem104 - 10-05-2015, 09:22 PM
RE: W124 build - by erx - 10-15-2015, 10:42 AM
RE: W124 build - by whipplem104 - 10-16-2015, 11:52 AM
RE: W124 build - by whipplem104 - 12-11-2015, 07:59 PM
RE: W124 build - by whipplem104 - 02-04-2016, 05:12 PM
RE: W124 build - by atypicalguy - 02-12-2016, 07:11 PM
RE: W124 build - by whipplem104 - 02-15-2016, 11:42 AM
RE: W124 build - by whipplem104 - 02-19-2016, 11:50 AM
RE: W124 build - by Sultzi - 02-19-2016, 02:04 PM
RE: W124 build - by whipplem104 - 02-19-2016, 04:17 PM
RE: W124 build - by whipplem104 - 02-19-2016, 07:44 PM
RE: W124 build - by whipplem104 - 02-21-2016, 12:16 PM
RE: W124 build - by whipplem104 - 02-23-2016, 02:58 PM
RE: W124 build - by whipplem104 - 03-03-2016, 05:12 PM
RE: W124 build - by whipplem104 - 03-11-2016, 02:07 PM
RE: W124 build - by whipplem104 - 03-18-2016, 11:25 AM
RE: W124 build - by atypicalguy - 03-22-2016, 04:44 AM
RE: W124 build - by whipplem104 - 03-22-2016, 11:16 AM
RE: W124 build - by atypicalguy - 03-24-2016, 05:30 AM
RE: W124 build - by whipplem104 - 03-24-2016, 10:24 AM
RE: W124 build - by whipplem104 - 03-24-2016, 02:36 PM
RE: W124 build - by SurfRodder - 03-24-2016, 03:21 PM
RE: W124 build - by whipplem104 - 03-24-2016, 03:58 PM
RE: W124 build - by atypicalguy - 03-24-2016, 11:22 PM
RE: W124 build - by whipplem104 - 03-25-2016, 08:12 AM
RE: W124 build - by atypicalguy - 03-25-2016, 03:47 PM
RE: W124 build - by whipplem104 - 03-25-2016, 04:10 PM
RE: W124 build - by atypicalguy - 03-25-2016, 04:27 PM
RE: W124 build - by whipplem104 - 04-10-2016, 12:54 PM
RE: W124 build - by erx - 04-11-2016, 01:47 AM
RE: W124 build - by whipplem104 - 04-11-2016, 07:57 AM
RE: W124 build - by erx - 04-11-2016, 09:12 AM
RE: W124 build - by whipplem104 - 04-11-2016, 12:45 PM
RE: W124 build - by erx - 04-11-2016, 01:19 PM
RE: W124 build - by whipplem104 - 04-11-2016, 01:35 PM
RE: W124 build - by Sultzi - 04-12-2016, 03:28 AM
RE: W124 build - by whipplem104 - 05-27-2016, 08:29 AM
RE: W124 build - by erx - 06-14-2016, 02:19 PM
RE: W124 build - by whipplem104 - 06-14-2016, 03:17 PM
RE: W124 build - by whipplem104 - 07-06-2016, 03:47 PM
RE: W124 build - by whipplem104 - 11-13-2016, 10:55 AM
RE: W124 build - by atypicalguy - 11-13-2016, 01:30 PM
RE: W124 build - by whipplem104 - 11-13-2016, 02:24 PM
RE: W124 build - by erx - 11-13-2016, 03:26 PM
RE: W124 build - by whipplem104 - 11-15-2016, 02:14 PM
RE: W124 build - by erx - 11-15-2016, 02:51 PM
RE: W124 build - by whipplem104 - 11-15-2016, 04:50 PM
RE: W124 build - by erx - 11-15-2016, 05:31 PM
RE: W124 build - by R-3350 - 11-15-2016, 07:58 PM
RE: W124 build - by atypicalguy - 11-15-2016, 10:33 PM
RE: W124 build - by whipplem104 - 11-16-2016, 04:56 PM
RE: W124 build - by erx - 11-17-2016, 04:11 AM
RE: W124 build - by atypicalguy - 11-17-2016, 08:53 PM
RE: W124 build - by atypicalguy - 11-17-2016, 09:03 PM
RE: W124 build - by Mr_Robs - 12-25-2016, 08:01 PM
RE: W124 build - by whipplem104 - 12-26-2016, 12:38 PM
RE: W124 build - by atypicalguy - 03-24-2017, 03:29 AM
RE: W124 build - by whipplem104 - 03-24-2017, 08:13 AM
RE: W124 build - by atypicalguy - 03-24-2017, 09:51 AM
RE: W124 build - by whipplem104 - 03-24-2017, 07:12 PM
RE: W124 build - by whipplem104 - 04-28-2017, 08:01 AM
RE: W124 build - by Turbo - 04-29-2017, 01:04 AM
RE: W124 build - by whipplem104 - 04-30-2017, 01:44 PM
RE: W124 build - by whipplem104 - 09-24-2017, 12:52 PM
RE: W124 build - by maxypriest - 09-25-2017, 09:00 AM
RE: W124 build - by whipplem104 - 09-25-2017, 12:09 PM
RE: W124 build - by atypicalguy - 11-20-2017, 10:14 PM
RE: W124 build - by whipplem104 - 11-20-2017, 11:31 PM
RE: W124 build - by whipplem104 - 04-24-2018, 01:21 PM
RE: W124 build - by atypicalguy - 05-15-2018, 01:23 AM
RE: W124 build - by MFSuper90 - 04-24-2018, 06:53 PM
RE: W124 build - by atypicalguy - 10-07-2018, 09:27 PM
RE: W124 build - by whipplem104 - 10-09-2018, 10:24 PM
Users browsing this thread:
8 Guest(s)
8 Guest(s)
Users browsing this thread:
8 Guest(s)
8 Guest(s)