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Technical ***September 2023 Banger Meet Thread - Beginning the Ber Months***

Discussion in 'Traditional Hot Rods' started by Jiminy, Aug 31, 2023.

  1. studebakerjoe
    Joined: Jul 7, 2015
    Posts: 1,127

    studebakerjoe
    Member

    @Outback in the Salmson work project pic is that a Curtiss V8 I see behind it?
     
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  2. walls
    Joined: Oct 6, 2005
    Posts: 635

    walls
    Member

    Checking in.
    No progress. Saving money for my engine rebuild.
    I did get a new cam from Jim Brierley though.
    IMG_7765.jpeg
     
  3. Outback
    Joined: Mar 4, 2005
    Posts: 2,331

    Outback
    Member
    from NE Vic

    Yes an OX5 going into a 1913/14 Wolsley, one of my bosses projects
     
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  4. noboD
    Joined: Jan 29, 2004
    Posts: 8,407

    noboD
    Member

    How about keeping us up to speed on that project too?
     
  5. Outback
    Joined: Mar 4, 2005
    Posts: 2,331

    Outback
    Member
    from NE Vic

    Will do, don't think we'll get to until next year, we also have some cyclecars on the go.
     
  6. railcarmover
    Joined: Apr 30, 2017
    Posts: 777

    railcarmover

    Yup.. they may pop, they may not..

    I come from a different time, when we laughed are our ethnicity.. times were better then in my opinion, there was a great limerick about Italian tires back then
     
  7. 35chevmn
    Joined: Sep 21, 2011
    Posts: 10

    35chevmn
    Member
    from mn

  8. Took the Coupe to GOW the other day.
    I do like the way the Blockley tyres grip. 4.50 x 19 out of interest. Pity the picture wasn't in the wet as they're just as grippy.

    [​IMG]

    Me n Roy in the rain.jpg
     
    Last edited: Sep 4, 2023
  9. Outback
    Joined: Mar 4, 2005
    Posts: 2,331

    Outback
    Member
    from NE Vic

    Great photos @hotrodfil looks like a hoot! How well do those Blockley's wear?
     
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  10. Stovebolt
    Joined: May 2, 2001
    Posts: 3,528

    Stovebolt
    Member


    Spoken with a tongue in one's cheek - you're really trying to to talk yourself into buying these tyres!!! ;););)
     
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  11. Outback
    Joined: Mar 4, 2005
    Posts: 2,331

    Outback
    Member
    from NE Vic

    I should just shut up & buy em aye! :D :D
     
  12. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    400 miles on the Burtz block and still going strong.

    20230819_083531.jpg
     
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  13. winduptoy
    Joined: Feb 19, 2013
    Posts: 3,260

    winduptoy
    ALLIANCE MEMBER

    I've got about 1200 on my rev.b now and it seems happy.....so any feedback to offer?
     
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  14. Dan from Oakland
    Joined: Jan 16, 2009
    Posts: 164

    Dan from Oakland
    Member

    "400 miles on the Burtz block and still going strong."

    Did you determine the cause of the piston failure??
     
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  15. At Laguna Seca Raceway; coming down into Turn 11. Though I did set the 4th fastest time of 20 entries in practice; I had a few missteps that put me back in the final tally! First one was the snap ring in the right rear hub (the one we had worked on) came loose; and second, I ran out of fuel on the last lap of our main event! All in all, however, the car ran very fast. This is the best engine we've had in this car. (It was running so fast that i put the rollbar back on the car!)
    2023RMMR(4).jpg
     
  16. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    It wasn't one thing, but the piston got too hot. A combination of lean jetting, timing advanced, and too much oil drawn in through the intake. The oil was drawn in from the PCV set up I installed. There was a lot of carbon build up on the pistons. The lean condition and timing was causing detonation and the carbon was retaining the heat that made the piston swell.

    .
     
  17. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    Feedback on mine? I like it so far. Runs smooth. I've been keeping it under 3000 rpm till it is broken in. With this set up the power really comes in @ 2500 and easily builds past 4000. 4200 is about the most I've seen it. I have an arbitrary 4500 red line set on it in the future but it might see 5000 safely. 70 mph is 3000 rpm in 4th gear. The fastest I've had it is 85mph in 5th. Not the slickest driving vehicle at that speed.

    .
     
  18. Dan from Oakland
    Joined: Jan 16, 2009
    Posts: 164

    Dan from Oakland
    Member

    Mind if I ask what your timing is set at now??
     
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  19. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    28 degrees total

    .
     
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  20. Well - they're warm and tacky in the rain...
    That said, they've been on about 4 years now and clocked up a few thousand miles and still have plenty of tread left.


    Mine heat seized at the top end of Pendine with a lean running problem. In the absence of any spare gaskets or the cash to get any shipped over, I've not been inside to investigate.

    That aside - yeah, very smooth running. I have the Burtz iron head on this one. Been getting around 25mpg (big UK ones...). With the barn like aerodynamics I sat at 75mph for a few miles the other day heading down to GOW, which is only 2250 rpm with my gearing. 55-65mph cruising is a pleasure at around 1750-2000rpm. With the stock A gearbox, 3100rpm in second is around 55 and it spins up there a treat...
     
  21. Commodoreswab
    Joined: Feb 12, 2011
    Posts: 337

    Commodoreswab
    Member
    from West TN

    How's the water outlet fit together? T or A? Jern was a friend of mine before he passed.
     
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  22. winduptoy
    Joined: Feb 19, 2013
    Posts: 3,260

    winduptoy
    ALLIANCE MEMBER

    Oh...I missed this chapter. I had taken a trip to Denver, in the Bertz powered Vicky. I ran the return trip of over 400 miles with a 45 mph headwind at 2:00. The aerodynamics of a brick ....barn per @hotrodfil I kept it wound out in direct and sometimes into third with my foot in it the whole trip home. I had a rear main leak and pulled the engine to address that. I have to pull the OHV first in order to pull the engine and when I did I had scoring from the rings, in the cylinder walls. I suspect that lean condition contributed to the condition along with ring gap, that I had at .018"
    It cleaned up with a .020" cylinder bore, new pistons and rings with the top one gapped at .024" as it appeared to be the only offender. I am running 31 degrees total timing but at higher altitude with no signs of predetonation

    But this is a different story of lean condition.... and it was something else when it came apart.... IMG_20230612_074306207.jpg
     
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  23. AZ_Nick
    Joined: Nov 29, 2015
    Posts: 40

    AZ_Nick

    Here's a shot of the part Neil Jern made to adapt the Ford water pump to Olds/Chevy. For this project I will be using a low mount water pump so I'll just fab something up to make a water neck.
    IMG_7127.jpg
     
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  24. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    Ouch.

    This was my piston issue
     

    Attached Files:

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  25. railcarmover
    Joined: Apr 30, 2017
    Posts: 777

    railcarmover

    Old school vacuum gauge can save you from headaches. It was the engine analyzer for years.
     
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  26. Dan from Oakland
    Joined: Jan 16, 2009
    Posts: 164

    Dan from Oakland
    Member

    I wonder if a different cam grind on the pistons would have helped?? One would assume the piston guys had that all figured out. The pattern sure is even. Does not look like the thrust surface was scored at all. Another thought, as the piston was getting hot, my guess (caution here) would be that the thrust surface would get unhappy long before the piston went out of shape enough for the corners to score like that. I assume you had enough clearance. I've found that with only a partial water jacket, sometimes things need a little more clearance, but this is still puzzling me.
     
  27. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member

    All clearances were good. #1 piston was the only one that had heat distortion and only the skirts. The cylinder walls were still round and the scoring was only piston material transfer. There were no signs that the cylinder was starved of oil from the bottom either. The new pistons have a coating on the skirts to reduce friction.


    .
     

    Attached Files:

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  28. Dan from Oakland
    Joined: Jan 16, 2009
    Posts: 164

    Dan from Oakland
    Member

    "Things hate people" !!!!
     
  29. If I can offer an observation to CDOs piston scuffing
    The dimensions measured after the scuffing would indicate the bottom skirt may not have enough cam in the shape of the piston
    However the dims up closer to the rings may indicate just an overheated piston
    As the piston heated up it expanded along the web of the pin bosses resulting in insufficient clearance
    Once cooled down it returned to shape/size

    Have never witnessed this before it usually ends up with pieces left in the pan or on the track
    In any case he is very lucky to not have had it become terminal

    J
     
  30. Crazydaddyo
    Joined: Apr 6, 2008
    Posts: 3,341

    Crazydaddyo
    Member


    I agree.

    I'm glad I was on a leisurely Sunday drive instead of driving it in anger at the track.


    .
     

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