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1979 L48 slow build thread - 4 speed

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Old Feb 22, 2020 | 03:55 PM
  #41  
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Originally Posted by Jokerb90
Secod coat
Fin. Not perfect, but much better. If I was to do it again, I would apply the paint with a syringe for each color. While they can be scraped, a needle and toothpick would have worked better
Thanks for posting this, and suggestions to do it better! I need to do this on my 79.

Originally Posted by Jokerb90
Next up. One cardboard box. Any guesses? Should be fun in a tiny garage...
Under the door side moulding panels?
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Old Feb 22, 2020 | 06:05 PM
  #42  
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Thanks for the kind words, would love to have new, but she’s a driver. And, the $$$ save on emblems can go for cardboard boxes...
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Old Feb 22, 2020 | 06:11 PM
  #43  
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Speed jack it is not

Crunchy. Pre sprayed last night, fingers crossed

Hmmm....stock? Me thinks not.

Yep, cat already gone. Might as well do it up right

Any excuse to buy a tool must be 100% exploited.

I swear officer, it just fell out.

Shiny, new toys. She might be a L48, but this should sound a little better.
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Old Feb 22, 2020 | 06:29 PM
  #44  
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Snapped two of the six exhaust studs, d’oh..gonna try double nut if they’ll go on, then vice grips and prayers. If they snap again — likely new jegs ram horns.

hope I can get ‘em, drilling out never ends well for me.

what is the passenger side valve thing about? Mine was rusted free, but the rod and what it attaches to is still there. It’s not likely to go back, what emissions purpose does it serve and how to best eliminate?




Last edited by Jokerb90; Feb 22, 2020 at 06:35 PM. Reason: Pics
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Old Feb 22, 2020 | 06:37 PM
  #45  
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The valve is the heat riser. It closes off the passenger manifold until the car comes up to temperature, and forces the exhaust up through the intake manifold, which helps to warm up the carb. It should fail open (vacuum holds it closed), but sometimes they rust shut in the closed position and cause all sorts of crazy problems.

There is zero reason to have it in your car. There are spacers available (both 2" and 2 1/2" inches diameter, depending on which rams horns you put in) if you need it to make your exhaust fit vertically.

If your downtube does care, and you use 2 1/2" collector rams horns, and your downtubes are 2 1/2" as well, I would think you'd need this:
https://www.zip-corvette.com/62-69-2...pe-spacer.html

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Old Feb 22, 2020 | 07:38 PM
  #46  
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My nemesis. 5 out of six. This one is stubborn. No good way to oil, tried double nut — threads are so gone the nuts just spin on each other. Vise grips - not much room. Had to walk away, will go to bat again tomorrow....
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Old Feb 23, 2020 | 03:24 PM
  #47  
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Moved starter for room, Bubba wuz here...not even a crimp.

Yep, that happened

Slow speed, high pressure has always worked best for me.

Jumped to every other bit, can’t get too greedy

Next up, my own “bubba” - will update
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Old Feb 23, 2020 | 05:16 PM
  #48  
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Drivers’ side sat.

Loose fit for now

And on to the next.

Should of tapped it, but didn’t think it would hold (drill went off center). Plus, wrong studs. Allens’ exhaust doesn’t need the riser. If (when) it leaks I’ll know where to look....
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Old Feb 23, 2020 | 05:20 PM
  #49  
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Would really like to get new ram horns and do it right, but if (when....) I snap a exhaust bolt in the head I‘d be really up a creek.

Last edited by Jokerb90; Feb 23, 2020 at 05:21 PM. Reason: Spelling
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Old Feb 25, 2020 | 05:15 PM
  #50  
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Better - think this will hold. Got the non heat riser studs for 2, then used 1 heat riser stud. The extra length worked with the nut on top, and I will be able to stabilize to tighten it up with the lower stud. Now just waiting on parts (bracket).
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Old Feb 29, 2020 | 03:27 PM
  #51  
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One bracket

Stock

Installed

Straight back

And out

I was hesitant about Allen’s chambered exhaust, I thought it would be obnoxiously loud — and yet — it’s not. Only test fired, idled, and a couple of revs, smooth sounding. Hope to take her out next week, but still need to adjust e-brake and likely swap speedo gear.
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Old Feb 29, 2020 | 03:30 PM
  #52  
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Speedo only works on deceleration, when I quickly let off the gas it will jump to speed, then fall off. GPS phone speed isn’t the best...
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Old Mar 7, 2020 | 11:05 AM
  #53  
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Was going to pull and lubricate....

But, this might cause some drag..

And this too.
Oh well, parts hunting I go. At least the black plastic speedo gear is good.
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Old Mar 11, 2020 | 07:46 AM
  #54  
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Well, new speedo cable failed drill test. Will likely road test tomorrow, but not expecting much. Good gear, good cable (now). Guess I will dig deeper....

Speedo works, gps tested, accurate. Suspect failed drill test due to key off — d’oh! Hall effect...

Last edited by Jokerb90; Mar 12, 2020 at 03:25 PM. Reason: Update
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Old Mar 13, 2020 | 04:26 PM
  #55  
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So I have logged some miles -12- now the trip odometer works too. Next up, turn signals. Hazards work, swapped flasher with working hazard - no change. Have new switch, will have to dig into the column a bit, from my you tube and forum searches.
but - need tool E4C0. Some kind of puller - before I dig that deep, I think I might try to hook up the switch before pulling the wheel and such, just to confirm. Don’t know if it’s do able or not, but thinking it might be after staring upside down under the dash for the speedo....will update as able

as always, input appreciated, thanks!
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Old Mar 13, 2020 | 04:50 PM
  #56  
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Originally Posted by Jokerb90
Well, new speedo cable failed drill test. Will likely road test tomorrow, but not expecting much. Good gear, good cable (now). Guess I will dig deeper....

Speedo works, gps tested, accurate. Suspect failed drill test due to key off — d’oh! Hall effect...
i also did allens
reused the cat and pipe heat shields to protect speed cable and body...not critical as it dont het as hot as a cat..

here is my thread..
https://www.corvetteforum.com/forums...79-4speed.html


Heat shield reused n duals from single

Last edited by interpon; Mar 13, 2020 at 05:11 PM.
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Old Mar 13, 2020 | 05:13 PM
  #57  
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Very Nice! Keep it up!

I would also like to know what that loose wire under the center console.
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Old Mar 14, 2020 | 03:08 PM
  #58  
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Floating turn signal switch test failed. It likely needs a ground, but I did not want to rig one where I thought it should go and cook something else. I don’t know how they git the magic smoke in them wires, but if ya let it out it never works right again...
this helpful video talks about E4C0 about the 8 min mark, but haven’t found yet. Any suggested sources appreciated.

steering wheel lock tool has many hits, just not E4C0, and I don’t want to buy the wrong one

Last edited by Jokerb90; Mar 14, 2020 at 03:12 PM. Reason: Ebay
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Old Mar 16, 2020 | 12:26 AM
  #59  
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just make sure its got the 9/16 thread,

https://www.ebay.com/sch/i.html?_fro...+tool&_sacat=0
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Old Mar 16, 2020 | 10:24 AM
  #60  
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Thanks! Should be here Friday. More weekend fun.
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