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Puffwagon's Territory Adventures


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I finally pulled the trans out and the input shaft had sheared off. I'll drop off the 6r80 input shaft and converter this week for machining and measuring etc. I reckon I'll get a GM converter modded to match the zf height, so I can get a higher stall speed to take care of any big turbo/big cams issues.

 

Anyhow here's a pic with a finger for scale

 

Xh9aFfx.jpg

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Did some tuning today. Apparently gapping the plugs did the trick cos straight away it ran up 605awkw with no tune changes.   I frigged around with fuel and boost and this and that, and mana

Here's the graph. I had to run it in 3rd to get a number as I was hitting a speed limiter in 4th and was too tardled to work out how to remove it. I disabled it in the vid block, changed it in the tun

Got to the dyno today and it went pretty much as I expected. The exhaust showed to be a huge restriction but we all knew that anyway. The first run right off the bat showed 367awkw on 16psi and

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well, it's only supposed to rotate about it's main axis, not any other axis and it'd be pretty freakin' strong in that direction, but not so much in the minor axes.

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Is that a slight twist in the shaft with the Barcode and number or was it stamped off center?
I feel at ease raping mine with its puny power... I do have a spare but I think it'll be all rusted by now!

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That's the shift I usually don't do unless street light racing as it's the shift that I can get the huge continuous misfire until I get off the throttle...
There's a heap of tuned mustangs around now but haven't managed to pull up next to one at the lights yet as they are to busy boy racing through traffic instead!

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14 hours ago, bjc said:

Is that a slight twist in the shaft with the Barcode and number or was it stamped off center?

Damn good eye! Didn't notice that till you pointed it out. Pretty clear that its twisted.

 

Very impressed with your efforts puff 😋

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13 hours ago, bjc said:

the huge continuous misfire until I get off the throttle

Sounds like you're hitting the old boost cut there mate.

 

9 hours ago, biddie_fiddler said:

Very impressed with your efforts puff 😋

Cheers mate hopefully I can get some fark off launches from hell happening soon :devil:

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There's about a 6 week wait to get my stuff sorted so I'll be able to get most of it done on the weekends, then finish it up when I get the input shaft and converter back.

 

Edit: I'm still waiting for my bush driver set too.

Edited by Puffwagon
M'bush
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So yerp pulled the 6r80 down today. Nothing looks too rooted in it, not that I'm a seasoned trans builder or anything. All of the steels are in good condition and all of the shafts/gears etc look and feel alright too. I'll get to measuring later in the week to confirm stuff.

 

The car that the trans came out of had a torque converter failure and had put some metal into the trans which is why I only paid $50 for it. I pulled the trans pump apart to have a look, as that will be where the metal starts it's journey into the trans. Sure enough the small inner gear has some damage and the pump cover has some damage too. It's not so farked that it wouldn't work at all but I'd rather do things more proplyer so will address it. I reckon I'll swap out the stator shaft from the 6r80 into one of the zf pumps and use that, otherwise I can get a 6r80 pump for about $500, or there might be something else I can do with parts/gear swapping etc.

 

The bushes in it need replacing so I'll go for a bronze bush kit, along with a couple of other bits to recon the zf valve body, replace needle roller bearings as one had fallen apart, and whatever else needs replacing apart from seals, as they will all get done anyway.

 

So yeh that's about it really. Will drop off the input shaft and converter on Wednesday and see how we go from there. I was thinking about cryo treating the output shaft too just for more peace of mind. I'm leaning toward keeping the stock converter now as it has a better lockup than a single disc gm converter but I'll see what the trans guy reckons, as it might not be up to the power level I'm going to throw at it. Haha one part of me wants to just buy a built trans but I'll have a crack at it myself first and if I fark it up, I'll reevaluate then.

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  • 1 month later...

So yeah nothing much been happening lately but...

 

Last time I drove the car, the turbo was making a zinging noise. Today I figured it was time to do a few more things to the wagon and fixing the turbo was on the list. Long story short, the bolts that hold the compressor housing backing plate on had all come loose and the back of the compressor wheel was rubbing on it. I whacked a small amount of loctite on the bolts, did them back up and whaddaya know, the turbo was magically fine again.

 

I also chopped the vband off the comp housing and welded a cast alloy bend in there. Now the intercooler piping will go a shorter and neater route and will let me install my 5 inch intake pipe. I'll frig around with the intake pipe tomorrow and weld a fitting to it for the catch can and it should be sweet.

 

Pics

 

SSdIjKs.jpg

 

23dH6nC.jpg

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Here da more pics. So basically cut the vband off the turbo, welded the cast alloy 3 inch bend to the comp housing, then welded the chopped off vband on to the cast alloy bend, which then has a 2.75 to 2.5 reducer welded to the other half of the vband, to fit the cooler piping. Does that make sense?!

 

tmfgOS1.jpg

 

JaECyYD.jpg

Edited by Puffwagon
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On the topic of IC piping sizes... Is there any information on diameter size and power handling?
 

I.e. 2.5" piping is good for up to xxxkw. 2.75" is good for up to xxxkw etc.

 

Companies sell different sizes as "stages". Wondering if the piping size is realllly that important?

@PuffwagonI take it then you're using 2.5" piping on the hot side? Assuming the same is for the cold side too?

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I'm using 2.5 in and out right now and I'm still using the stock throttle body. I'd only consider changing the pipe size if I swapped a whole bunch of other parts to take it past 1000awkw. Currently it all works at 700awkw so that's where it'll stay for now.

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