 threw another #3 rod, how to prevent this from happening again. |
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| crash914 |
 Oct 29 2019, 03:17 PM
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its a mystery to me  Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region  |
So blew up my #3 rod. wondering what caused this. lack of oil, due to rpm? poor return? oil pump sucking air?
last time it was #2 rod. I really don't want to live with this again. Motor specs, Dual oil coolers with full flow plumbing 102 bore by 80mm stroke long rods, ham heads and valve train. Running to 6800 rpm g loads to 1.5 windage tray modified at pushrod tubes for oil flow tuna can with 1/2 extra oil Pics of horror below. First are this failure, then old failure.     |
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Posts in this topic
crash914 threw another #3 rod Oct 29 2019, 03:17 PM
Chi-town What kind of rod is that? Looks aftermarket?
Odd ... Oct 29 2019, 04:38 PM
wndsrfr With the stroker crank, do a really thorough inspe... Oct 29 2019, 07:31 PM HAM Inc Man that sucks!
I think the rod bearing seized... Oct 29 2019, 04:57 PM crash914 I did get some warning (that I ignored) running h... Oct 29 2019, 06:14 PM HAM Inc
I did get some warning (that I ignored) running ... Oct 30 2019, 07:35 PM Superhawk996 Not trying to be a jackass . . . but sometimes i... Oct 29 2019, 06:28 PM Superhawk996 On a more constructive note.
Play with this cen... Oct 29 2019, 07:12 PM Chris914n6 I can't think of a motor with nearly a 4... Oct 29 2019, 11:14 PM rick 918-S
I can't think of a motor with nearly a 4... Nov 1 2019, 06:49 AM GregAmy
:agree: check your connecting rod ratio to assi... Nov 1 2019, 07:00 AM falcor75 Pushing an engine with low oil pressure and knocki... Oct 29 2019, 11:46 PM crash914 I accept the responsibility for the failure. No ne... Oct 30 2019, 10:53 AM jd74914
I accept the responsibility for the failure. No n... Oct 30 2019, 12:28 PM ClayPerrine
I accept the responsibility for the failure. No n... Oct 30 2019, 12:59 PM mepstein Regarding bearings, I’m curious why 6800 is hig... Oct 30 2019, 11:33 AM crash914 Exactly what I thought also. That the valve train... Oct 30 2019, 11:50 AM johnhora Herb..
20 hours is pretty good for MTTF
were both... Oct 30 2019, 11:50 AM crash914 I will know more after the post. Engine is ready ... Oct 30 2019, 12:40 PM sixnotfour
Clay that's a 66x95 2.8....76 911 66x90 2.5+.... Oct 30 2019, 01:55 PM ClayPerrine
Clay that's a 66x95 2.8....76 911 66x90 2.5+... Oct 30 2019, 01:56 PM sixnotfour All I Know is; Type Four Sale :idea: :lol4: :dr... Oct 30 2019, 02:01 PM crash914 oil temp was elevated due to the rod bearing failu... Oct 30 2019, 07:45 PM jd74914 Thinking out loud here...Why are you running high ... Oct 30 2019, 08:16 PM yeahmag I had to rebuild two motors before switching to a ... Oct 30 2019, 09:30 PM crash914 actually my CR is higher, more like 10:1. I hate ... Oct 31 2019, 05:18 AM HAM Inc Don't vent the heads. Oil pools in vented T4 h... Oct 31 2019, 06:21 AM VaccaRabite
Don't vent the heads. Oil pools in vented T4 ... Oct 31 2019, 09:57 AM crash914 Good read. Thanks Len.
For things to note, I did ... Oct 31 2019, 08:29 AM HAM Inc
Good read. Thanks Len.
For things to note, I did... Oct 31 2019, 03:56 PM yeahmag I employed Lens and Jakes work on the current moto... Oct 31 2019, 08:43 AM crash914 Len, just so I am clear, plug the head vents, don... Oct 31 2019, 03:59 PM HAM Inc
Len, just so I am clear, plug the head vents, don... Oct 31 2019, 05:02 PM GregAmy Totally taking this off-topic a bit further...last... Oct 31 2019, 04:10 PM HAM Inc
Totally taking this off-topic a bit further...las... Oct 31 2019, 05:20 PM GregAmy
Greg you don't need anymore oil incidents... Oct 31 2019, 05:39 PM HAM Inc
[quote name='HAM Inc' post='2758607' date='Oct 31... Oct 31 2019, 06:20 PM GregAmy The NOLA "Jackie Stewart" commentary is ... Nov 1 2019, 05:08 AM HAM Inc
The NOLA "Jackie Stewart" commentary is... Nov 1 2019, 07:35 PM Superhawk996
I would spend in the neighborhood of a 100 hours... Nov 2 2019, 01:53 PM cuddy_k Curious...could unbalanced components accelerate t... Oct 31 2019, 04:10 PM yeahmag Greg,
Just make sure that you increase the chimne... Oct 31 2019, 05:23 PM GregAmy Just make sure that you increase the chimney vent ... Oct 31 2019, 05:42 PM crash914 I did run it to failure. Before this last event t... Nov 1 2019, 07:14 AM Mark Henry To me 6800 rpm is really pushing the limits of a s... Nov 1 2019, 12:46 PM crash914 Thanks Mark, I was hoping to get your insite.
Try ... Nov 1 2019, 01:38 PM dirk2056 When I had my heads reworked the machine shop clos... Nov 1 2019, 02:23 PM crash914 It sounds like it was a good idea. Nov 1 2019, 02:41 PM GregAmy Dat's purdy work up there...if you're bore... Nov 3 2019, 06:15 AM HAM Inc Colin Chapman was a genius. He would have gun dril... Nov 3 2019, 08:50 AM type2man One thing no one else has asked is how were the ot... Nov 3 2019, 12:21 PM crash914 Engine is out, I won't have a chance to split ... Nov 3 2019, 07:53 PM HAM Inc Herb, based on the picture of your crank I'd b... Nov 4 2019, 07:10 AM GregAmy FWIW, the prior owner of my car kept losing rod be... Nov 4 2019, 07:29 AM crash914 Oil starvation makes sense. More to come. The que... Nov 4 2019, 07:34 AM GregAmy The question will be how to address it without bre... Nov 4 2019, 12:29 PM HAM Inc Herb are you running an accusump?
I'm of the... Nov 4 2019, 06:52 PM GregAmy Nice, Len!
I, too, have been thinking about t... Nov 4 2019, 07:08 PM HAM Inc The CB pump is okay, but it has an internal cross ... Nov 4 2019, 07:33 PM HAM Inc Some more pics.
Opening the scavenge port in the c... Nov 4 2019, 07:46 PM Superhawk996 :rotfl:
Laughing at all the work that that goes ... Nov 4 2019, 07:53 PM GregAmy I'm amazed at the work that went into this dev... Nov 4 2019, 08:25 PM HAM Inc
I'm amazed at the work that went into this de... Nov 5 2019, 07:20 AM crash914 I do have and run a tuna can. I do not have an acc... Nov 4 2019, 09:18 PM Superhawk996
Don't think I will use a 80mm crank though.
... Nov 5 2019, 05:55 AM crash914 But what a fun motor! Light up the tires whene... Nov 5 2019, 06:31 AM Superhawk996
But what a fun motor! Light up the tires when... Nov 5 2019, 06:27 PM crash914 The tires I light up are 225 45 15 Hoosier A7... Nov 5 2019, 07:05 PM crash914 Motor is disassembled. See below for some picture... Nov 10 2019, 03:43 PM crash914 A couple more pictures.
Nov 10 2019, 03:45 PM crash914 case GA000277 is history.. Nov 10 2019, 03:46 PM VaccaRabite I have a 2L case you are welcome to.
Zach Nov 12 2019, 08:41 AM crash914 Thanks Zach! I might take you up on that offe... Nov 12 2019, 08:45 AM  |
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