(Note: LANDRACING.COM donations are not tax deductible)


This is a public forum. The opinions expressed here don't
necessarily reflect the feelings of The Folks That Run The Site (that's us)
unless we explicitly say so, ok?


Author Topic: Inline-four crankshaft  (Read 213835 times)

0 Members and 2 Guests are viewing this topic.

Offline Stainless1

  • Administrator
  • Hero Member
  • ***
  • Posts: 7371
  • Age: 68
  • Location: Near Furley and Kechi KS
  • Robert W. P. "Stainless" Steele
Re: Inline-four crankshaft
« Reply #435 on: October 02, 2018, 11:25:13 AM »
I'm pretty sure we were able to see egt and afr while running Max's bike.... That is all Max wanted to see live when it was to run on the dyno... didn't get it done fast enough to run on the dyno,
I watched live data while it ran on the salt.
Keep at it, you are getting there  :cheers:
Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #436 on: October 03, 2018, 12:37:58 AM »
Yes, I can have all data on the screen simultaneously. But it's somewhat cluttered, so I'd rather have a simple display of air/fuel ratios for a crew member to watch closely.
Also- for live display of all data we had to run two copies of AQ-1, since AQ-1 makes you choose either AEMnet (air/fuel) or the other channels (EGT, etc.). I haven't yet determined whether there might be a problem with two programs both trying to create a log file at the same time.
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline Stainless1

  • Administrator
  • Hero Member
  • ***
  • Posts: 7371
  • Age: 68
  • Location: Near Furley and Kechi KS
  • Robert W. P. "Stainless" Steele
Re: Inline-four crankshaft
« Reply #437 on: October 04, 2018, 10:25:25 AM »
Did I mention a laptop in the area of the motor to watch live may need to have a solid state drive.  Acoustic vibration (read loud motor noise) can cause a spinning hard drive to lock up... therefore the computer locks up and becomes unresponsive.... don't ask how I know  :-o
Keep learning... sooner or later it will be fun  :cheers:
Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #438 on: October 05, 2018, 01:13:30 AM »
Yes, I got the loan of a laptop with solid-state "hard drive".
If the weather cooperates, we might test-run it this weekend.
« Last Edit: October 05, 2018, 01:15:49 AM by Jack Gifford »
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #439 on: October 07, 2018, 11:09:59 PM »
Good test run! No leaks, bad noises, etc. Great throttle response- almost instant 6,000RPM on half-throttle jabs (6,400 per log). Boost pressure didn't log (software? hardware?), but all else did. Boost gauge showed ~10 PSI, so blower drive is at least in the ballpark. Air/fuel ratios were all a little fat as planned, and log data will help balance port nozzles better.
I'm finally ready to schedule another dyno session.
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline jacksoni

  • Hero Member
  • *****
  • Posts: 1202
  • Age: 75
  • Location: Annapolis, Maryland
Re: Inline-four crankshaft
« Reply #440 on: October 08, 2018, 06:50:06 AM »
 :cheers: :cheers: :cheers:
Jack Iliff
 G/BGS-250.235 1987
 G/GC- 176.245  2018
 G/GMS-182.144 2019

Offline RidgeRunner

  • Sr. Member
  • ****
  • Posts: 797
  • Location: Ashfield, in the Territories of Western Massachusetts
Re: Inline-four crankshaft
« Reply #441 on: October 08, 2018, 07:41:35 AM »
     Congratulations!

     All the best for as fun a trip to the dyno,  :cheers:

            Ed

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #442 on: October 11, 2018, 01:07:02 AM »
Dyno session Friday 10/26/18 (and Saturday if necessary). :-)
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline wobblywalrus

  • Hero Member
  • *****
  • Posts: 5039
  • Age: 66
  • Location: backwoods Oregon
Re: Inline-four crankshaft
« Reply #443 on: October 11, 2018, 06:45:31 AM »
Jack, this is what was told to me by the experts when I do this.  First, use dyno power curves to determine the richest stoich ratio that produces best power.  Consider the air/fuel mixture instrument reading for this to be "indicated optimum mixture."

Set the timing to the most retarded setting that produces the best peak torque.

Record the EGT for best mixture and timing. Consider this to be "indicated optimum EGT."

I am sure you already know this.  It seems to work well for me.   

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #444 on: October 13, 2018, 01:10:05 AM »
Jack, this is what was told to me by the experts when I do this.  First, use dyno power curves to determine the richest stoich ratio that produces best power.  Consider the air/fuel mixture instrument reading for this to be "indicated optimum mixture."

Set the timing to the most retarded setting that produces the best peak torque.

Record the EGT for best mixture and timing. Consider this to be "indicated optimum EGT."

I am sure you already know this.  It seems to work well for me.    
If I get the opportunity to do all of the above, that will mean the engine has survived a number of dyno pulls- which in itself would be cause for celebration!
« Last Edit: October 21, 2018, 10:31:36 PM by Jack Gifford »
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #445 on: October 31, 2018, 11:02:19 PM »
Well, it almost survived. After three days of quite a lot of dyno running (could you believe 13 gallons of alky?), I thought it might come home undamaged. But today #3 cylinder died with a head gasket leak- probably not merely the gasket. So one more time it's got to come all apart. :-(
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline Sumner

  • Global Moderator
  • Hero Member
  • ***
  • Posts: 4067
  • Age: 75
  • Location: Blanding, Utah
  • Blanding, Ut..a small dot in the middle of nowhere
    • http://purplesagetradingpost.com/sumner/sumnerindex.html
Re: Inline-four crankshaft
« Reply #446 on: October 31, 2018, 11:46:30 PM »
Admire your engineering and perseverance on the build  :cheers:  Hoping for a smaller setback than you anticipate,

Sumner

Offline Stainless1

  • Administrator
  • Hero Member
  • ***
  • Posts: 7371
  • Age: 68
  • Location: Near Furley and Kechi KS
  • Robert W. P. "Stainless" Steele
Re: Inline-four crankshaft
« Reply #447 on: November 01, 2018, 09:57:06 AM »
Well it sounds like you were running it like it was Bonneville....  :-o
I hope the data will help you figure out what happened... With any luck it is just a head gasket issue, keep us informed
 :cheers:
Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #448 on: November 02, 2018, 01:34:55 AM »
Robert- the air/fuel ratio data was helpful. Unfortunately the borrowed laptop had an "SD card error" which prevented logging. But I was able to watch live display of air/fuel ratio while the dyno logged everything else. Using both EGTs and air/fuel we were able to tweak port nozzles for good balance of all four cylinders. Didn't make a lot of power (too long a story to attempt here) and I don't yet have a copy of the dyno logs.
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline Jack Gifford

  • Hero Member
  • *****
  • Posts: 1318
  • Age: 79
  • Location: Phelps, NY
Re: Inline-four crankshaft
« Reply #449 on: November 06, 2018, 12:04:33 AM »
Easy to see what happened, with it apart now. The dyno "incident" last spring (cylinders 2 & 3) had lifted the center of the head, which I hadn't noticed when repairing the torched spot in #3. Had to cut the head deck .0125" today to get it flat again. No damage done this time other than the gasket.
M/T Pontiac hemi guru (or does guru status expire after 30 years?)