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86 4kq restoration "restomod"

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 Post subject: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 4:58 pm 
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Hey everyone, I haven't been active on the forums in quite some time. I'm finally retiring my daily driver 4kq to undergo a slowish full restoration and I wanted to document the progress somewhere. The future holds a lot for this old car. Full bodywork and paint, complete interior restoration and upholstery, 5 lug and big brake upgrade, still undecided on power plant options. I have been dying to start this project for some time now and I'm sure I'll have tons of questions as progress is made.

ImageIMG_0770 by Jesse Wilson, on Flickr

ImageIMG_0771 by Jesse Wilson, on Flickr

I am still debating internally about whether to keep the 10vt with the CIS to keep it more originalish, do an EFI swap on the 10v, or to just bite the bullet and find a 20vt and do away with the 10v all together. I know the cost of going EFI and a bigger turbo on the 10v isn't going to be much different than just building a 20v.

Whatever the motor, it is getting a complete rebuild, which at that point, I feel like the 20v would just be better.

After a fair bit of trouble and struggle, ITS OUT!!

ImageIMG_0797 by Jesse Wilson, on Flickr

ImageIMG_0807 by Jesse Wilson, on Flickr

ImageIMG_0804 by Jesse Wilson, on Flickr

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1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 5:14 pm 
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Nice to see another 10vt in a small chassis, even if it was just to see it out in the next pic.

As far as EFI goes, it doesn't have to be expensive. With VEMS you can buy an econoseal unit for fairly cheap, and that will work with the flywheel sensors you already use with the MAC11. I'm running on MS3X, and pushing 22psi from a K24. I should be right around 300hp at the crank, and it's a lot of fun in my 80q.

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1991 Audi 80 quattro (10vt project)
1991 Audi Coupe Quattro (my first 20v)
2007 Mitsubishi Raider(Dakota in disguise)
2019 Chevy Cruse Hatchback RS (wife's new ride)


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 6:31 pm 
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interior removal beginning, all the carpet and seats out, trunk lining out. Replacing vacuum lines and removing all the original sound deadening materials. The old stuff was nice and crunchy after 30+ years. Putting in new dyno mat on the floors, trans tunnel, doors, and trunk.

ImageIMG_0740 by Jesse Wilson, on Flickr

ImageIMG_0744 by Jesse Wilson, on Flickr

ImageIMG_0760 by Jesse Wilson, on Flickr


Going to cut out access to the window assembly to fix the passenger side motor, I'll probably find something to put in for a vapor barrier in place. Any suggestions? Otherwise its gonna be some plastic sheeting and caulk :-)

ImageIMG_0742 by Jesse Wilson, on Flickr

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1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 6:48 pm 
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DE80q wrote:
Nice to see another 10vt in a small chassis, even if it was just to see it out in the next pic.

As far as EFI goes, it doesn't have to be expensive. With VEMS you can buy an econoseal unit for fairly cheap, and that will work with the flywheel sensors you already use with the MAC11. I'm running on MS3X, and pushing 22psi from a K24. I should be right around 300hp at the crank, and it's a lot of fun in my 80q.


I've been feeling that if Im not going to restore the current CIS system and keep the car more true to its roots, then I'm just going to have to build it for bigger power. I've always wanted to build a set of headers and this would be a great opportunity to try that out. I've been kicking around the idea of a custom intake manifold too. But at this point is where it makes more sense to just swap to a 20v I suppose. I have just grown fond of the 10v I guess.

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1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 7:22 pm 
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Don't get me wrong, a 20vt is a fast track to more power, but the sound of a modified 10vt is like nothing else. After putting my 3" exhaust on, I have yet to find anything comparable.

I'm about to start working in the sound deadening of my CQ. How did you remove the old stuff? Also, how did you decide to go with the kilmat? It does seem to rate highly on most of the sites I've seen, and price seems to be quite reasonable as well.

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"If you can't find one, make one"

Dallastown, PA
1991 Audi 80 quattro (10vt project)
1991 Audi Coupe Quattro (my first 20v)
2007 Mitsubishi Raider(Dakota in disguise)
2019 Chevy Cruse Hatchback RS (wife's new ride)


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 7:38 pm 
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I decided to finally do something about the sound quality of the factory set up speakers. I figured the best way is to box the speakers in the back. I will never be carrying much anymore as it will pretty much be a strictly show car usage vehicle. After doing some volume calculations, I decided that for space sake, I would do a single box separated and sealed individually.

ImageIMG_0749 by Jesse Wilson, on Flickr

2"x 4.75" ports in each chamberP

ImageIMG_0755 by Jesse Wilson, on Flickr


Mounted the crossovers and all wiring internally.

ImageIMG_0754 by Jesse Wilson, on Flickr

6.5" Polk Audio speakers, I actually reused the factory tweeter plug and mounted it to the face of the box so I can plug in the tweeters that are mounted on the rear deck insert. I sealed the two chambers off with some caulk sealant.

ImageIMG_0758 by Jesse Wilson, on Flickr

My measurements were pretty close, just a little trimming and it's in. The speakers sit pretty close to where the factory speakers sat. To not look weird, I'm going to just mount the speaker cover on the deck insert and cover the underneath with black speaker cloth.

ImageIMG_0761 by Jesse Wilson, on Flickr

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1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun Oct 20, 2019 7:43 pm 
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DE80q wrote:
Don't get me wrong, a 20vt is a fast track to more power, but the sound of a modified 10vt is like nothing else. After putting my 3" exhaust on, I have yet to find anything comparable.

I'm about to start working in the sound deadening of my CQ. How did you remove the old stuff? Also, how did you decide to go with the kilmat? It does seem to rate highly on most of the sites I've seen, and price seems to be quite reasonable as well.



I decided on the kilmat after a little research. The kilmat material is butyl rubber, thicker than most, and pretty decently priced. I've driven it since installing the mat and it makes a pretty big difference for sure.

As for removing the stuff, most of it just peeled off and the rest that was still in good condition I left and put more may over it. What's important is trying to the stuff to contact as completely to the metal as possible to reduce sound transmission. I used the rounded back of a screwdriver to press it into the different stamped steel contours.

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"I like to go fast and have fun"

1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Mon Oct 21, 2019 4:57 am 
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Cool project! Following along.

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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Tue Oct 22, 2019 3:13 pm 
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Throwing this out there for consideration is to put a 7A 20v in. Almost a 50% HP increase with minor work


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Tue Oct 22, 2019 5:09 pm 
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quattrofan wrote:
Throwing this out there for consideration is to put a 7A 20v in. Almost a 50% HP increase with minor work

Not from the 10vt that was in there.

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"If you can't find one, make one"

Dallastown, PA
1991 Audi 80 quattro (10vt project)
1991 Audi Coupe Quattro (my first 20v)
2007 Mitsubishi Raider(Dakota in disguise)
2019 Chevy Cruse Hatchback RS (wife's new ride)


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Tue Oct 22, 2019 5:23 pm 
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DE80q wrote:
quattrofan wrote:
Throwing this out there for consideration is to put a 7A 20v in. Almost a 50% HP increase with minor work

Not from the 10vt that was in there.



Didn't see it was a turbo.


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun May 17, 2020 5:56 pm 
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Welp, I've got my act together and purchased an 200 with a 3b for my donor car. Picked it up from Telluride and drove it all the way back to Denver with 311k miles on the odometer. Wouldnt build boost for some reason but still made it over the pass at 60 mph. Burns some oil too. Not really worried as its getting a full tear down and rebuild anyway.

Image586 by Jesse Wilson, on Flickr

Image624 by Jesse Wilson, on Flickr

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"I like to go fast and have fun"

1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun May 17, 2020 6:06 pm 
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Got the engine out and mostly disassembled this weekend.

Imagemotor out 001 by Jesse Wilson, on Flickr
Imagemotor out 002 by Jesse Wilson, on Flickr

I think I lucked out on no cracks in the head. Its kind of hard to tell. There's some pitting in cylinder #1 where there would be a crack, but I think its just pitting and not actual cracks.

Imagehead 008 by Jesse Wilson, on Flickr
Imagehead 007 by Jesse Wilson, on Flickr

I broke two studs from the water manifold off in the head, even with heat and sitting in some PB blaster. And had to cut a head off of the middle lower exhaust manifold because it had rounded off. Snapped one other manifold bolt off in the head. :frustrated:

Imagehead 010 by Jesse Wilson, on Flickr

Found a dead spider in a cavity in the head

Imagehead 009 by Jesse Wilson, on Flickr

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"I like to go fast and have fun"

1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Sun May 17, 2020 8:50 pm 
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And a other 200 gone


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Mon May 18, 2020 5:12 am 
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quattrofan wrote:
And a other 200 gone


To be fair, it was in reeeal rough shape and rust holes through the frame lol. Still kinda sad.

On another note. Anyone need any parts from a 200?

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"I like to go fast and have fun"

1986 Audi 4000cs (current restoration project)
1994 Mazda Miata "Caddiata" 4.9L v8 Lemons car
2019 VW Golf R


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 Post subject: Re: 86 4kq restoration "restomod"
PostPosted: Mon May 18, 2020 8:35 am 
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To be fair also, I also use a 91 200 as a donor for my URQ. Have parts also. Not much market for parts sicnce all the cars are coming off the road.

I'd like to find a decent 200 at a decent price. I'm covered if anything breaks :)


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