So ive decided to jump back into TDs. I want to make some quality youtube content and really show the world what we are all about.
Now introducing... My new 1985 Omni GLHT! Gold dust with a red interior swap. Mostly stock. 109k miles. Little rust. Shitty paint. And a lot of charm. Hasnt run in 4+ years, but thatll be solved soon.
I cleaned up and pump pulley and primed it up for paint, but the weather isn't playing along. Otherwise, I pulled out the rest of the brackets and hardware to be reinstalled soon hopefully.
The original engine tote is all but empty. At least all of the parts that remain are easy to ID as not going to be reused.
I cannot believe I have missed this thread. Man I love all the details and photos you are providing to this community! Sadly the only engine I ever built was a Ford DOHC 4.6 so this thread is full of great information and tips!
Great job on the build, and I can't wait to hear Gold Dust rocking its new heartbeat!
Hell ya. Thank you for the appreciation. It definitely helps to know that there are people out there digging it.
I can't wait to take my first lap around the neighborhood, but wow is there still so much to do. The rebuild is one thing, but biting off the megasquirt conversion at the same time is daunting.
I'll be happy with an actual start and preliminary tuning. Worst cast scenario, the pistons are rattling in the bores so badly that I need to pull it out again to put some slugs in it... Even still, there would be so many wins by that point.
Hey Mark,
Little FYI in case you didn't notice this bolt hole (circled) penetrates the waterjacket. Needs some thread sealant on it. Many people miss it. On the CB's this hole is blind, not so on the early blocks. Pulling this bolt out of the chassis on L-bodies is sometimes difficult, as it wants to run into the framerail before backing all the way out. I usually modify the
alternator bracket a bit so it cannot hang me up. Also careful not to overtorque this bolt too, I've seen a few people have to heli-coil this bolt hole. A beatch when in the car!
Oh nice! Thank you for the heads up. Ya I was diddling that lil hile after I had installed the water pump. There are quite a few holes that I need to plug yet, including the water stuff for the turbo.
I'll dry fit my motor mounts and alt bracket next just to prove where they are supposed to go at this point...
Hey hey! I believe I got my exhaust studs from TU when I got some of the other fasteners. I'll back track through the thread and see if I documented when I got them. I'm pretty sure that I got them from him since he was the only one that offered the square tooth cam sprocket at the time.
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Fellas! Time for some updates! I have been working way too many hours since August, and have finally been able to scratch my itch to get back on the Omni!
Randy, that Citristrip gel description is hilarious. The stuff did reasonably well for me.
Looks awesome and I need to do that to my dipstick as well as oil distribution block while my engine is at the machinist. I will follow it up with something called Shark Hide to prevent corrosion and dulling.
This is after I sanded the ribs 2 hours after painting because I am thrashing irresponsibly. Fortunately I did not run the fresh paint job with my carelessness.
Thar be some contact between the wastegate bracket and the intake.
So I came about a spot of a problem. I tested the Holset wastegate and it is either a 2.5 bar or 3 bar can. Obviously that's not going to cut it. So I will be grafting a large can from one of our garrets on.
Hurdle #1: create a mounting solution.
Hurdle #2: build new linkage that fits the tight confines between the turbo and intake manifold.
I like the adjustable actuator on the Holset unit, but it is too darn chunky. I made a new actuator rod from a .25" stainless rod and piece of 1/8" stainless sheet that I had In the garage.
This setup Fits pretty well without touching or catching anything.
Tomorrow I'll attack the mount as well as Frankensteining onto the Garrett can.
So, what are yalls thoughts. The actuator "flag" has changed the geometry of the actuator linkage, which reduces the total needed stroke of the actuator. This reduces leverage of the actuator can, thus reduces the amount of force the exhaust gasses will need to exert to push the flapper open themselves...
My thoughts:
1) extend the actuator a good 1/2 through its stroke when I weld it all up to maximize the effect of its internal spring.
2) weld a seat to the actuator rod that will let me put springs in between the can and the rod so I can increase spring pressure if required.
So I had the night to think about how to make a mount for the Garrett wastegate can. I decided that I wanted a solution that would allow me to swap/replace the Garrett can with another like unit with the least amount of effort as possible.
I have settled on and fabricated bracket bolted to the Holset mount, and also bolts up to the Garrett can.
There are a lot of funny angles at play with the way that the mounts built, so getting the right angle with the adapter was a chore. I mocked up the multiple piece with vice grips to dial in the angle.
Once the adapter bracket was welded and bolted up, I cut the new linkage to length and marked an index line on both rods to be able to reorient them for welding. I did shorten the length of the assembly by 1/4" to preload the wastegate spring.
Burned together and test fit.
Rattle can rebuild.
Finish install. Actuator cracks at 5psi and full open at 11psi.
I was surprised that I still had my old 2piece rail from TurbosUnleashed. 2004ish maybe? 2003? I thought I had sold it in the last 5 years. It still has the "gussets" that I burned to the flimsy mounts that came with it. The original mounts allowed the rail to push away from the injectors and cover the engine in fuel when I had it in my 89 Shelby Daytona. I thought the car was going to burn down that day...
Test fit (after cleaning of course).
When I bought the injectors, I only sized the manifold side. I didn't care about the rail side because I had accepted that I would be making a rail. But here we are! It is a nice surprise.
And they slide into the manifold just fine. Even though my janky stainless rail mounts bolt up... I will be making new mounts. I have some 3/16" 6061 begging to be put to use.
And my last project for the day was to get the TB cleaned and ready.
I definitely did sell my old 52mm TB a few years back. And since the 2 piece intake was wollered out for a 52mm, I picked up another. It was and eBay junkyard pull off.
Broke it down. And gave it a proper kerosene bath.
Huge difference. The staining and nasties came right out.
Clean the guts.
I was only slightly motivated to do the screw trim and bore/plate smoothing... but then that motivation left as the sun went down. I'll just turn the boost up a little more in compensation. This engine will not surpass 325hp, if it lives to make it there. That'll be my cut off to get into the next engine.
Looks nice Mark, Well done! Way back in the day there was a guy that still used a stock 46mm throttle body on his race only GLHT. Almost dipped into the 10's using that puny little thing. Not saying that is the way to go, but bigger fish to fry. It's like if you need to go faster, you just change the set of car keys right (lol)?
I also made all my own fuel rail mounts. When it comes to fuel systems, I don't mess around cutting corners or using questionable parts.
Thank you! Ya I'm deep in it again. Eating and sleeping TD again lol.
I agree, when I was fussing about the "mods" to the 52, I just reminded myself that G.Donovan felt that the differences were negligible between the 46 and 52.
I actually bought my 2 piece from Gary in 02 or 03 and it didn't come with the rail...
Funny story, I called Chris at TU for a clutch and we went down memory lane a lil. He asked if I had purchased from him before, and I told him about a few parts including my fuel rail...
Me: " I bought one of the first 2 piece rails that you sold."
Chris: "One of the ones with TurbosUnleashed anodized in?"
Me: "No. One with flimsy sheet metal mounts."
Chris: "One bend or two bends in the mount?"
Me: "One. And it was trash, almost burnt my car down."
Chris: "Oh wow, that was one of the first 10 that we sold before we realized the the mounts were garbage and changed suppliers. I'll send you new mounts."
So that's cool. I no longer need to make mounts. Chris is sending me a new aluminum set. Score!
Otherwise, I ordered a Black clutch with 6 puck spring less friction +10% diameter. Also, a TU header, unmachined on the turbo flange which I'll use for the next engine, and then I snagged some poly mounts.
Routing versus threaded holes was less than desirable so I opted to try hack-a-fabbing some mounts. I liked the outcome except for the fact I bent them the wrong way which revealed the hammer marks...
I just flattened tubing and bent it over, then welded to a washer.
Cheater tube so that you can ascertain the dimension from bender toe to back of 90. This is critical to know to layout your bends.
Making some moves. Rolled an offset around the spark plug, and then back-to-back 90 around the head.
Completed tube.
Installed with the Tee for relocating my quality guage sending unit, not that I don't trust the guage in the dash...
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