Supercharger pulley

[oldestof11]

I love this truck a lot. I think this setup has been on the longest of all your chargers, right?

 

[Tacoclaw]

Thanks, Mark.

You know I'll never stop ****ing with this truck, it's like some sort of disease. This setup is definitely worth the hassle too, after driving it home as a single again I'm ready to just stick it back on with no paint or mods and never take it off. I have no idea how I used to think this '52 was tolerable as a single. LOL


Jon, I think the single S362 was probably the longest so far. It's what I started my 1stgen thread for after all. (Well, it and the cowbell).

I don't foresee me switching anything on this setup though, if this bypass will let the turbo breathe then the only next step I'll shoot for is a Pro52 instead of this Volvo one. With the blower and no bypass I'm stuck at 15psi max. On the way home, with my AFC almost completely cut to nothing, I still hit 45psi. Smoky as hell too. :lolly:

I'm hoping this timing bump will help me out, it's been a long time coming.

 

[Tacoclaw]

Well, here's the *very* early mockup of my bypass. It'll all fit without interference there, it hangs right in front of the oil filter and clears the back of the alternator with plenty of room. I'll probably run a steel 45* from the turbo inlet, short, straight coupler to the TB, then weld a plate to the blower inlet piping that the TB can bolt to, then fill in it's gaps with pieces of cut 4" pipe. All holes will be matched to the 4" pipe going into it.

I know 2 perpendicular corners with no wall to direct the air isn't a good scenario but it's all I've really left myself. I can make a mounting plate for the factory bypass actuator there pretty easily, it's just the horrible flow path that's got me down.

Oh well, it's a VE truck. Not like it's maxing the inlet flow of an HX52 anyways. :lolly:

 

[TURBOLVR]

You're doing it wrong. The way you seem to have it, the bypass will block the SC outlet when closed, and when open it will blow the filter off. The bypass needs to be between the filter and intake and no restriction between the SC outlet and turbo inlet. HTH.

 

[DRAM2500]

looks good

 

[Tacoclaw]

That steel 90* with the white line around it is the outlet of the SC into the turbo, the pipe I've got the TB sitting against is the pipe from the filter to the SC inlet. I drew that line around it so I'd know where my coupler sat when connected. I intend to cut a 4" hole into those pieces of pipe and T the crossover into them as it shows there.

It should (somewhat) keep the boost from the inlet pipe, then open up and bypass around the blower. There may be some pressure against that TB when it opens since I'd like to keep the turbo from pulling a vacuum, but it shouldn't be more than a couple psi. Maybe if I'm lucky I can use it to blow the dust out of my filter everytime it opens. :lolly:



Thanks, DRAM. :Cheer:

 

[TURBOLVR]

I tried that too. With the turbo and SC competing for air from the same filter it didnt do well. 2 separate filters helped fix it.

 

[Tacoclaw]

I see, thanks for the tip!

I've got another filter laying around here but real estate is getting tight on that side of the engine. The bypass filter will end up somewhere around the heater box, right in the heat.

Guess I've finally got an excuse to pull the turbo and put on the other Levi's manifold blanket I've got laying here. :rockwoot: Probably wrap the downpipe as well.

 

[Tacoclaw]

It's fab day again, I stopped for some lunch and grabbed some in-progress pics of my attempt. I'm running the blower inlet back up behind itself, then running its filter up towards the blower pulley. My bypass piping will take its previous place down in the lower fender area.

I'll probably get this blended and welded, mock up a together shot for you guys, then think long and hard about how bad I need a cold beer. If I can talk myself out of it I'll then try to plumb the throttle body and mount it's actuator, but since it won't get me driving it by Monday it's gonna be tough.

 

[Tacoclaw]

Quitting for the day, I suppose I'll but the TB in that stretch of pipe between the blower and the rubber 45*. There isn't much room for it and all its BS anywhere else.

All the little weld bubbles/spatter will be cleaned up, the whole ordeal is getting blasted and painted before it goes on for the final time.

Couple of options for the filter placement, I'll probably go out towards the pulley so it isn't sandwiched between the fender lip and the blower. I'll make a bracket off the blower body to hold the piping in place.

 

[Tacoclaw]

Well, any questions, comments, things you notice that I completely ****ed up, feel free to let me know.

Otherwise, I'll be back next week.

 

[Headcase98002]

What air filter is that, 2790? A 6637 is only 8 1/2" wide compared to the 11" wide filter to give you a little more room.

 

[TURBOLVR]

Looks like you got a handle on it.

 

[Tacoclaw]

No idea on the actual number, it's the AFE prodry that's the same dimensions as the BHAF.

That is good thinking, it would be nice to get that filter back some so it won't be a huge ordeal to get to my lights/other filter that's going to be buried under there. I need to go peruse the AFE website, it would be easier than trying to build around what I've got.

Then again, building around what I've got is what I always do. :lolly:

The lower filter is a smaller one, but I wanted to run the bigger one there since I assume the truck will use it 99% of the time. That lower filter was also what I ran when I just had the 24v breather puking blowby all over the front of my engine. That poor filter sucked up as much of it as it could.

 

[Tacoclaw]

It's pulled apart for a tooth-jump and paint/fab, so I grabbed a couple pics of my ghetto idler setup so you can see how it all mounts. I'm off for a couple lunch beers, then I can start the actual important fab, as it should be. :lolly:

Here's the bracket I made for the accessory drive, it bolts to the bottom holes where the fan idler used to be.

I welded in the verticle angle for extra support, then faced the back of it so it would sit flat against the block.

 

[Tacoclaw]

Also a shot of the two filters I'm running, one is BHAF sized and the other has a slight taper to it. You can see how crappy of a life the smaller one has had, those ProDry elements are usually white. LOL

 

[Tacoclaw]

The rest of my progress today, if I had another 4" straight coupler I'd have been testing out how this bypass worked...


I'm going to try having manifold boost run to the lower port and interstage boost run to the upper one. I'm not sure of how well it'll work since that thing has such a weak spring, but until I start messing with regulators and whatnot it'll have to do.

[ame="http://www.youtube.com/watch?v=YMr6HbkB_5Q"]http://www.youtube.com/watch?v=YMr6HbkB_5Q[/ame]

 

[Tacoclaw]

TIME!!!

Of course I put my dirty-ass hand right on the freshly painted compressor housing, so I'll have to repaint that someday, but everything else seemed to stay decent.

I've got to work on the control for the TB. It's nice down low, but once you're up and moving it likes to hang open and that's no bueno. With the timing bump this turbo went from "meh" to "yeah ****ing right" on spool time.

I may just try a simple return spring on it too, try different tensions and see if I can get it to a point that I can tolerate.

 

[Dazed&Confused]

Like I said good work.

 

[Ghostman]

Cool, video running/driving?