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zredbaron

NA 3.1L=>head & camshaft questions. No shortcuts, max

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On ‎7‎/‎14‎/‎2018 at 10:04 AM, munters said:

A question where did you find the throttle lever with a hole (screw through) and idle adjustement for the left carb side?

Thanks Marcel

 

Hi Marcel. I'm not sure I'm following you. 

 

I do have custom throttle levers with a set screw. The purpose is to hold position throttle arm angle on the round throttle bar, and not slip. Metal tabs were welded and tapped, and then the arms were custom coated to match OEM Weber.

 

They do not have adjustments for idle. Idle speed is controlled by the carburetor idle speed screws (1 per carb) and the adjusting the lengths of the connecting links between the custom throttle levers and the carburetor throttle.

 

It isn't the best design / best welds. I broke one of the welds too easily. Very disappointing after all that effort. Now it all has to come off and be resynched...IMG_4268.thumb.JPG.17998ef56dc3bf859b8d1148433071ba.JPGIMG_4372.thumb.JPG.63860832c9e277a991c44a28c9d43f36.JPGIMG_4985.thumb.JPG.f201b1347e6571c902ba9c0961c468b5.JPG

 

 

Edited by zredbaron

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1 hour ago, rustler753 said:

Really looking forward to the data you are willing to share. I am heading towards a new setup with 38mm or 40mm chokes on my weber 45s so I am very curious about all your jet settings. I asked early about a few things like your idle jets but I'd love a bigger picture to see the direction you went with each jetting option we have available. 

 

Prior to my velocity stack hacks, I would have advised the 40mm venturis exclusively for drag/road racing (38mm for all else).

 

If you are ok with the coin required to upgrade and possibly partially/fully mod your intake parts (three options), you will not be disappointed by 40mm venturis fitted with 47-49mm ID stacks.

 

I apologize for being vague. (I want to make sure I have my notes in front of me.)

 

My dyno date was rescheduled, not due to my schedule. So it goes. I'm not sure when the reattempt will be. I'm racing almost every weekend until October, so it might have to wait until fall. I don't remotely lack for torque or power, so it won't impact my racing as much as a throttle cable upgrade might.  :2thumbs:

 

I've been carrying around a folder with pages of my jet settings. I need to organize it and figure out how to best present the highlighted data.

 

I'll deliver.

Edited by zredbaron
Parenthetical Details

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21 hours ago, zredbaron said:

 

Prior to my velocity stack hacks, I would have advised the 40mm venturis exclusively for drag/road racing (38mm for all else).

 

If you are ok with the coin required to upgrade and possibly partially/fully mod your intake parts (three options), you will not be disappointed by 40mm venturis fitted with 47-49mm ID stacks.

 

I apologize for being vague. (I want to make sure I have my notes in front of me.)

 

My dyno date was rescheduled, not due to my schedule. So it goes. I'm not sure when the reattempt will be. I'm racing almost every weekend until October, so it might have to wait until fall. I don't remotely lack for torque or power, so it won't impact my racing as much as a throttle cable upgrade might.  :2thumbs:

 

I've been carrying around a folder with pages of my jet settings. I need to organize it and figure out how to best present the highlighted data.

  

I'll deliver.

 

Absolutely no worries, I am a patient man.

 

Our motor setups are similar, but I have been finding upper end power a little lacking with my 36mm venturis so its exciting for me to do a comparison between the two. I have been planning for some time for an exhaust/intake update so the more data I have the better. You put it well; there is certainly a lot of coin involved if you are going through all the jet settings so I want to try to get it right. Only major glaring difference I see between your testing environment and mine is elevation as I am at 5,000 ft up so I will definitely keep that in mind when you present your data. 

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@zredbaron

 

Sorry to be a bother, but I have been messing with tuning my Z recently and was hoping I could reference some data you have gathered. It's been a few months since I asked so I figured I would check back in and see if you would be willing to divulge what you have learned and data you gathered during your trials with chokes, jetting settings and velocity stack tryouts. 

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Bah! My apologies good sir. I burnt myself out trying to keep the car in working order and finishing the racing season.

 

Tell you what... PM me and we can coordinate offline / phone call that way you aren't waiting for my presentation! No one wants that. 

 

I haven't forgotten and still plan on at least one dyno session this year with some of the data that I didn't collect last time. Evidently L6 intake data remains high on my list to contribute to the S30 community!

 

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Posted (edited)

For those that aren't big on reading, I'll put this first! I'm not big on social media, so the following invite to this YouTube premiere has not been advertised anywhere online. This thread is the first online announcement.

 

I invite you all to join me in watching my racing film (2017 memoir) this Saturday, July 13, 2019 @ 0930am PST (GST -8) on YouTube.      

  • 125++ hours editing (24 minute film).
  • 19+ years of dedication (21 years now in 2019)
  • 3"+ of receipts
  • Seriously-satisfying images and sounds
  • I don't care much if the video goes viral, but I would enjoy watching it live with those who are available.
  • It's a major life event for me.... Cheers! I hope you can make it, and if not, I know you will enjoy it whenever you have the time.  :2thumbs:

 

Ok. For those who like updates.... sorry it's been so long! I have delayed mostly because I'm a perfectionist and lately that results in inaction more often than activity. So it goes.

 

I ordinarily would post pictures but I'm just not organized enough right now. Better to at least check in...

 

  • Ok, so... belated update... but 2018 was a dope ass racing season!
    • (I didn't share. I don't really do social media much. I'm starting to crawl out of my turtle shell again. Thanks for the canvas to express.)
    • It was a wild success, even though I didn't really experience it as pleasant at the time. (Depression? Blood, sweat and tears? Same same?)
    • I didn't win anything other than a couple man-fridge magnets in classes too small... attendance prizes in truth.
    • I beat only one of my targeted peer benchmarks (a B Prepared 80s Corvette), but I felt like I had a few wins on several other non-timed categories. LOL
      • Most eye appeal (usually tech inspectors missed things because of shiny vintage)
      • Best sound (too loud for many but still top notes to a surprising high % of people that just had to say so)
        • (credit to the legendary L6, John Coffey's R&D, and of course Joe Harlan the builder!)
      • Most fun ("crisp horsepower," "smooth skating" (end of season),  "what just happened," "now my adrenaline is up (faster driver+car)"
      • Purist / vintage award
  • Racecar upgrades included (photos one day when I organize offline stuff from last year):
    • Welded frame rails
    • Custom front frame swaybar mounting [system?]
      • Photos one day when I organize my offline photos
      • 2 Plates welded to both top and bottom of frame rails
      • 2 additional plates for clamping:
        • One plate had a long hollow finger that passes through the frame rail
        • and conically fits into other side
      • Long stud through all of it and holding pillow blocks at the bottom
    • Front Brake rotors
    • Custom aluminum driveshaft (third party vendor via MSA... anyone know? nice product.)
    • 350/300# springs and later 400/350# springs (and a lot of rear rebound adjustments!)
  • Racecar problems included
    • Drivetrain ripped apart
      • Wolf Creek CV kit:
        • Excessive play
        • Adapter plate loose.
      • Retightened.
        • Happened again.
        • Found walleyed adapter.
      • rebored
        • Larger bolt, higher torque
        • safety wire interior adapter (yes! impossible labor)
        • safety wire exterior adapter (again, new custom bolts)
        • safety wire driveshaft
        • safety wire inboard adapter (diff side, still)
      • Halfshalfts restored, CV axles are trash
        • Axles literally developed play between the shaft and the splines (not a solid piece!?) - unacceptable!
        • 300bhp through a 4.37 Quaiffe on 245mm Hoosiers
        • U-joints  Survived even with ATB (!)
      • R180 rebuild #1
        • Play can be felt between OEM stub axle splines and Quaiffe
        • After the rebuild, it behaved like a welded diff - spinouts caught me off guard but powersliding was way easier - I'm used to ATB!
      • Moustache bar snapped
        • Straight up sheared in half (!)
        • got torque?
        • stock halfshafts with spicer u-joints still intact (NOTE FOR BUDGET RACERS!!!)
        • Holy R180, batman!
      • R180 rebuild #2
        • New donor ring and pinion (4.37, 1982 Datsun 720 King Cab 4x4)
        • There's a reason the Quaife is warrantied for lifetime under racing conditions!
        • Evidently too much Loctite was the cause of the ATB behaving like a welded diff
        • Blew my mind, and that of the AAMCO staff
        •  
      • Quaife wins this round!
    • Slicks died - twice
      • Brake bias a major issue
      • Aggressive driver a more major issue
      • 2 bias proportioning valves installed (1 removed)
    • Tachometer died
      • Can only blame my younger, amateur self since I was the one whoinstalled it
    • Season end
      • I miss a "very high speed" autocross event in Montana (Top Gun) 
      • I literally hauled 10 hours and fly my father from out of state to attend
      • I miss a "high speed" autocross event in Spokane, WA (Octocross)
  • What's Next?
    • I haven't driven my car in 2019 yet
      • Will focus on seat time for remainder of summer
      • Intake R&D (air horns, venturis, etc.) is still pending -- for this upcoming winter (no foreseeable overhauls for once)
    • Fabrication nearly complete:
      • Ermish Racing CV axle conversion (chromoly stubs and outers, no adapter plates anymore)
      • Custom Woodward steering column upgrade
      • Throttle cable upgrade, including a fine-idle speed adjustment cable implemented via OEM interior choke handle
      • Rear brake line and e-brake cable repairs
      • Rear sway bar installed for first time since 2009
    • Will perform hot leakdown test to confirm engine health
    • First ever time-trial / HPDE for the car (and driver) on 8/3/19 (engine builder Joe Harlan will be an instructor on his home course, Portland Int. Raceway)

 

 

Edited by zredbaron

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7 hours ago, Ereschkigal said:

Nice video

Is it still the Datsun or Subaru R180?

 

Glad you liked it.  :)

 

At the time of the video:

  • OEM Driveshaft
  • Datsun R180, OEM carrier and stubs
  • Datsun 4.37 Ring and Pinion, from 1980 Datsun 720 King Cab 4x4 (front R180)
  • Quaife ATB differential

 

Now:

  • Aluminum driveshaft
  • CV stubs (and outers) are American chromoly directly into the Quaife (no adapters).
  • Different CVs now, too. (Ermish Racing 2.0 kit)

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