slayer61 finally has a Dune buggy!

[oprn]

Type 1 engines don't have head gaskets...

But yes a leak like that would sound like a bad lifter. When my Bus engine was still in the Bus and I drove it I expected to find a very loose tappet. It sounded like a .015" or .020" valve lash but when I checked they were all good. Turned out to be a cracked head.
_________________
Our cars get old, we get old but driving an old VW never gets old!

[slayer61]

My wife has super human hearing. She can hear stuff that the dogs can't hear. On our last outing she says

[slayer61]

So, a bit of an update... I guess.

I've had a hell of a time trying to tune the carb on this thing. Pig rich, fouling plugs on the low speed circuit, difficult to start no matter what jets are in it I was ready to give in and called Ron Lummus about a 4bbl carburetor and would it be any better on the street? He asked about my turbo and says I have the wrong turbo, not the wrong carburetor! It should be able to sit there and idle all day with carbon seal turbo with a 3" compressor inlet. Long story short, there's a new Garrett turbo coming from Ron Lummus.

The last couple of times I checked the valves, most of them were tight. Dammit... The valves are tuliping or the seats are being pounded into the heads. Either way, they won't last, so I got on to the waiting list for Greg Tims to make me a proper set of turbo heads. My credit is resting for a while
_________________

[slayer61]

My new air/fuel meter from Summit came in yesterday. I purchased the Autometer brand... it matches the rest of my gauges. But the cable that runs to the sensor, is shorter.
The biggest part was building the cable extension to reach the back of the car. I think I finally have big enough idle jets in it to actually start "tuning" the carb.

Stay tuned!
_________________

[slayer61]

Thanks John.
That's interesting about the o2 sensor. I'd not heard that before. I'll have to look into it. I knew i didn't want it to close to the end of the exhaust, so I had it put in the collector.

I didn't smoke the sensor, (yet) the damage was self inflicted

Be well. Paul
_________________

[NJ John]

I liked and subscribed your video!
I used to have my O2 sensor before the turbo. Everyone told me that the pressure is a sensor killer. So I moved it. I can’t remember, but I think mine did fail. I does stick having it in the short exit pipe.
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage

[slayer61]

Update, Sunday afternoon.

I made it back to the shop and cleared up the wreckage of my morning attempt to get some gas. Removed the damaged cord and sensor element. I plugged the port in the exhaust and taped up the lose wires associated with the afr and set off to try again.

This time I saw the boost gauge hit 5.5 psi. (Keeping in mind that the boost controller is set to 7 psi right now) This is just stupid fun. Like an old dope fiend, I've had my first hit of a mind altering drug, and I want more!


Sadly, no more "tests" until I get a new afr gauge.

Have a great Sunday guys
_________________

[rayjay]

Turbos are definitely the cat's behind!! I had never even ridden in a turbocharged car until I bought a new Z last year. These things are setup with 2 small turbos that start making boost very low in the rev range. In the brochure torque is shown as "350lb/ft from 1800 to 5400 rpm" [ the numbers make be a tiny bit off, going from memory here ]. This thing pulls like a big block V8 from low revs and is a banshee over 4500. It hits an upshift at 100 mph that snaps your head back. I got the 9 sp auto so I could experience paddle shifting. It's pretty cool with some minor downsides.
.
I had hoped to eventually turbo/EFI my 74 Beetle but life has intervened and ALL the VW stuff has found new homes and the Z is my last awesome car. So keep updating this thread!!!

[slayer61]

Sunday morning update!

I've been struggling with the jetting of the 45 DCOE on the turbo. At idle it peaks out the afr gauge and dies. I've upped the idle jets to "almost there", but it ran pig rich once i get it off idle. I put in some smaller mains and, again, it's "almost there". Enough so that it's time to go to the gas station, before I run it out of gas in the shop



Gently and quietly down the street, and out onto the highway. In second gear with 3 pounds of boost it's spinning the back tires and hauling ass... I get third gear and instantly a huge racket that matches engine rpm. I know this can't be good...

Turns out it sucked the afr cable into the fan!!! Aarrrgghhh! I mean YYAAAYYYY! It's not engine damage! Trouble indeed, but easily fixed.

Be well guys
_________________

[slayer61]

I think I have successfully loaded a video to YouTube. Not very tech savvy

https://m.youtube.com/shorts/HKFugOIZB4k
_________________

[67rustavenger]

[slayer61]

[67rustavenger]

Good job getting the PR tube to seal.

I did try to explain the process you used above. I guess I didn't do a very good job of spaining.
_________________
I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!

There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!
2003 Astrovan? GFYS again, Xevin!
Don't let your bad ideas remain, ideas!

[slayer61]

So it seems that getting push rod tubes to seal, is just a matter of holding your tongue right. I used my patent pending push rod tube compression tool (a short length of mule tape half hitched onto the tube) to compress and re seat a couple of tubes with enough success to stem the flow of oil hemorrhaging out! Huzzah

Now I just need to sort out my DCOE accelerator pump's failure to do it's intended task.
_________________

[slayer61]

I have a suitable work bench my engine stand is on, I just don't have a run stand yet

And yes. My work bench is almost as tall as the buggy roll bar.
_________________

[rayjay]

It's niggling issues like this that made me a believer in test stands. Tall test stands so no bending over. Comfortable working height when standing.
.

.

.

[slayer61]

That's a lot of work for nothing. I really wanted to see a smoking gun ruptured cooler, or something

It could have been worse... I could have been working on a sedan or van or something!
_________________

[slayer61]

Thanks for your input. I have JayCee push rod tubes. One of them wasn't seated when I experienced the first leak. I replaced the seal and reset the tube, but the leak continues. I pulled the fan and shroud to inspect the dog house cooler and it's clean and dry.

_________________

[67rustavenger]

Well, the oil leaks are disappointing, as you well know.

What pushrod tube are you using?
My 2276 leaked like a sieve when I fired it off a few years ago. The pushrod seals were leaking.
I use JayCee PR Tubes. I pulled the tubes loose against the springs and wiggled the tubes and seals a bit to get the seals reseated. No more leaks.

Unless you didn't tighten the oil cooler well, you may have jostled the seals a bit but, that's not a likely scenario.

I wanna hear/see a video of that thing running.
_________________
I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!

There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!
2003 Astrovan? GFYS again, Xevin!
Don't let your bad ideas remain, ideas!

[slayer61]

Turbo update
My turbo drain hose, from RAD showed up yesterday and got installed this morning. Check. Game on.

Motor filled with Valvoline's finest 10-30. Done.
Removed plugs and disabled the ignition. Done
Turned on ignition to fire the fuel pump and bench set the fuel pressure regulator to 3 PSIG. Also tightened up fuel inlet so fuel leak would stop.
Cranked engine over until oil showed up at the end of the turbo oil feeder line and hooked it back up.

Plugs back in and ignition enabled.

Time for test fire fingers crossed

It fires and sounds bad ass! it has an oil leak... dammit

It appears to be running out of one of the push rod tube seals

Smoking gun found and replaced

Now it's leaking like the Exxon Valdez
Double dammit
Now I'm wondering if I didn't upset the oil cooler seals when josteling the fan shroud on and off...

ALSO dammit I found that the rubber 45 degree hose from the turbo collapses under vacuum

Long story short, I expect it's coming back apart to redo the cold side tubing and inspect the oil cooler and seals

_________________