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Underbody braces, turbos and more!

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 Post subject: Re: My T3 project
PostPosted: Tue Jul 03, 2012 5:25 am 
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Posts: 784
Location: Palmdale, Ca
Transmission mount is done. I used an Energy Suspensions GM trans mount.

I made a plate to bolt to the trans to take the place of the stock mount.
image_id: 21876

The GM mount is much shorter than the stock mount. So to space it right and make it easier the attach the mount to the plate we welded bolts to the plate and used two washers to make it the same height as stock.
image_id: 21877

The mount and preload plate bolt right on now.
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Mounted on the trans.
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Cross member installed.
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I'm waiting for a backordered part for the turbo because I decided to change the setup a little. So the header will have to wait until the part comes in, 3-4 weeks :( But there's still more work to do. Next will be the dogbone trans mounts. Those should be simple enough to make replacements. Then maybe the panhard bar.

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1987 Chevrolet Sprint Turbo under construction


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 Post subject: Re: My T3 project
PostPosted: Tue Oct 16, 2012 5:17 pm 
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Location: Palmdale, Ca
Well, I've finally got something to update. I had ~1-1.5" clearance between my battery box and my panhard bar. And since I lowered the car and plan on lowering it more, I needed an adjustable panhard bar anyways. So I started with a 5' stick of 1" dom tubing, stainless center adjuster, 1.125" energy suspension bushings, 1" sleeves for the bushings, a pair of 3/4" taps (RH&LH), and a pair of 3/4" jam nuts.
image_id: 22287

Cut two 14" pieces of the dom tubing, drilled, and tapped the holes.
image_id: 22286
image_id: 22285

Next I bent the ends to 40 degrees to give me another ~2.5" of extra clearance for my battery box and had the sleeves welded on.
image_id: 22284

I'm happy with how it came out. Now if I want to drop the back an extra inch or two I'll still have plently of clearance and be able to re-center the rear axle. I'll powdercoat the bars black and have the center adjuster polished.

I also brought the rear axle home so I could work on it during the week.
image_id: 22283

So I'm not sure exactly how low the panhard bar will be to the ground until I get the rear axle work done and bolted back on. I have plently of tubing left and I'll remake it if I need to.

Here's a little teaser of what I'm planning for the rear axle though :D
image_id: 22282

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1987 Chevrolet Sprint Turbo under construction


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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 4:12 am 
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Location: Palmdale, Ca
Just wanted to leave a little teaser update pic :D

image_id: 22545

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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 9:39 am 
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Joined: Tue Feb 13, 2007 10:28 pm
Posts: 1175
Location: So Cal, USA
You have a water cooled turbo?


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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 1:15 pm 
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Joined: Thu Aug 16, 2012 8:53 am
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Location: Northwest
That manifold looks potent! What max psi are you planning on running?


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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 3:02 pm 
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Location: Palmdale, Ca
JamalSpelling wrote:
You have a water cooled turbo?

Yep, GT2560R. Jard recommended that turbo to me. I have a water cooled wastegate too :wink:

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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 3:25 pm 
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Location: Palmdale, Ca
XAWAX wrote:
That manifold looks potent! What max psi are you planning on running?

That I'm not sure of yet. I will only be running 10lbs around town and we'll see we'll see how much boost it'll make before it puts out too much heat for the intercooler for the times I want to turn it up :twisted: I imagine with the methanol injection, ~25psi.

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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 9:07 pm 
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Location: Palmdale, Ca
We finally got started on the header. It's been a long time waiting for a big update, I know. And this is a BIG update :D

I had decided to go with an external wastegate instead of the the internal wastegate the turbo came with. I also wanted to go with an external wastegate housing instead of gutting the wastegate out of the internal wastegate housing. So I had to wait a few months while it was on backorder to get the right housing.
image_id: 22515

It uses the larger t3 flange instead of the t25 flange the old housing had. Also the round 4 bolt downpipe flange makes the downpipe easier to fit and make.
image_id: 22516

image_id: 22517

Got the A/C compressor mounted and entended all the way it's bracket. Then laid the turbo in there so it clears the compressor.
image_id: 22518

I had a flange water jetted a long while ago, don't have a pic of it. Got a few 1.5" 180 degree 2" radius stainless mandrel bends.
image_id: 22505

Only took three of the bends. each tube is a small straight and two 90's.
image_id: 22507

Each tube is roughly the same length. With #1 being little longer to clear the A/C compressor.
image_id: 22508

image_id: 22509

The downpipe was easy enough to make and clears everything pretty well.
image_id: 22510

image_id: 22511

For my external wastegate I went with a Tial MV-S 38mm. It's very small, only 3.7" tall. I chose it because it was small, water cooled, I found it much under listed price on ebay, and I was impressed on how well they work in extreme conditions. There's a youtube video of the non-watercooled MV-SA (which is the same wastegate but with extra cooling fins instead of the water cooling) and they're pumping 2050 degrees through it at 60psi. The housing and stem is glowing red hot and after regulating 60psi for 17,000 cycles it's still holding up and the head temp is only 194 degrees.


Plus, it look damn cool :ez_cool:
image_id: 22512

image_id: 22513

image_id: 22545

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1987 Chevrolet Sprint Turbo under construction


Last edited by 1987TurboSprint on Fri Feb 15, 2013 9:57 pm, edited 1 time in total.

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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 9:47 pm 
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Location: So Cal, USA
Youre seriously embarrasing the rest of us. :oops:


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 Post subject: Re: My T3 project
PostPosted: Fri Feb 15, 2013 9:56 pm 
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I also got my rear air suspension done!! :D

I got two firestone 800lb air bags. They're used for helper bags for leaf spring trucks but they're overkill for my Sprint.
image_id: 22514

I started by making sure I had enough room to work with. The bags want to be 6" tall at ride height and it looked really close so I used a 6" tube to measure the top mounts height and to get an idea of where the lower mount would need to go.
image_id: 22519

image_id: 22520

Then I cut off the spring perches.
image_id: 22548

To mount to lower plate to the rear axle I used a two inch hole saw to cut the perches the lower plate would be welded to.
image_id: 22526

image_id: 22547

Then welded it them to the axle.
image_id: 22491

image_id: 22492

For the upper mount, I cut the upper plate round to fit up inside the upper spring perch. Then welded a 4" tube to that for the stock spring isolator to fit in.
image_id: 22493

image_id: 22495

Then bolted the rear end back in.
image_id: 22497

Also the shocks keep the bags from extending all the way when the back is jacked up so I don't need a limiting strap. You can see the panhard bar turned out pretty good.
image_id: 22499

I just have an old AirLift compressor jury rigged to it for now. Later I'll get a good compressor. Also no tank for now. I have a momentary switch on it for now. The switch turns on the compressor and that fills the bags and the other side of the switch opens a dump valve to lower it. So both bags are tied together but eventually they'll be independently controlled.
image_id: 22498

All the way down :ez_cool:
image_id: 22501

All the way up :shock:
image_id: 22500

And about where I want it for going down the road
image_id: 22503

image_id: 22504

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 Post subject: Re: My T3 project
PostPosted: Fri May 24, 2013 8:41 pm 
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Location: belleville ont
great build! do you plan on bagging the front?


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 Post subject: Re: My T3 project
PostPosted: Fri May 24, 2013 9:31 pm 
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Yes, there's a company in Arizona that says they can make any strut an air strut and I think it was around $400. But I'll probably look into the VW strut housing swap first.

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 Post subject: Re: My T3 project
PostPosted: Fri May 24, 2013 9:49 pm 
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Location: belleville ont
1987TurboSprint wrote:
Yes, there's a company in Arizona that says they can make any strut an air strut and I think it was around $400. But I'll probably look into the VW strut housing swap first.



VW strut housing swap? care to share? never heard of that one before


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 Post subject: Re: My T3 project
PostPosted: Sat May 25, 2013 9:52 am 
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Apparently mk1 Golfs or Rabbit front struts are very close and can be swapped and Koni makes adjustable inserts for them. I'm hoping to do that then bag them so I have air bags and adjustable dampening.

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 Post subject: Re: My T3 project
PostPosted: Sat May 25, 2013 10:08 am 
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Location: belleville ont
1987TurboSprint wrote:
Apparently mk1 Golfs or Rabbit front struts are very close and can be swapped and Koni makes adjustable inserts for them. I'm hoping to do that then bag them so I have air bags and adjustable dampening.


nice i have not heard of that one yet.


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 Post subject: Re: My T3 project
PostPosted: Thu Jul 18, 2013 11:50 am 
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Joined: Tue Jul 16, 2013 12:54 pm
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Location: Añasco, Puerto Rico
Looking Good...

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