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My v8 Mk1 Part two

25K views 112 replies 30 participants last post by  paul woods 
#1 · (Edited)
Continued from part one which is here http://mr2oc.com/showthread.php?t=346142

I got my exhaust system finished completely today, i changed my rear tail pipe type to these, turned out i just did not have the space for the larger twin silencers...





With the system tacked i took it off for seam welding...



I then got the wideband lambda bosses welded in along with my EGT probe boss.I am also wrapping my whole system to try and minimize heat in the engine bay/boot.



Just two more pipes to wrap and it is ready for final fitting, hopefully the noise levels will be acceptable!
 
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#29 ·
Wow, very impressive work.

Considering that the MKI engine bay is kinda short and wide, and the MKII engine bay is a little longer and narrower, I wonder how well this would fit in a MKII... I'm sure that it would still have to protrude into the passenger compartment, but I wonder how much...
 
#31 · (Edited)
paul woods said:
If you search MikeH's posts here you will see his Mk2 version.It only protrudes into the cabin by a little from what i can tell by his pics.
Thanks. I don't frequent the V8 forum enough to know all of the projects that are going on :)

I probably will never atempt something like this myself, but it sure is fun to read about. :thumbup

EDIT: I take that back. I found the thread, and it turns out I actually had posted in it, I had just forgotten about it :clumsy:
 
#34 ·
After studying the audi cooling system (as it would be on the S8) i discovered an Mr2 coolant filler point was not going to work, the highest rated cap i can find for the Mr2 is a 1.5bar Sard cap, and the S8 runs closer to 1.7bar max pressure.... so using the mr2 filler neck was binned off.

So i needed to look at the VAG way of doing things, and took a punt on a VW golf custom expansion bottle, this will plumb up correctly to the V8 system and will have the S8 stock 22psi cap fitted, it's also a bit of eye candy in the engine bay.



 
#35 ·
More test running, this time with a fully sorted cooling system, twin 11" spal fans on my radiator, hooked up to the stock Mk1 rad switch/relays and VW expansion bottle with 22psi cap.

It ran for 15 minutes with no fans on, then when it hit 88* at the EFI temp sensor the rad fans came on slowly (first stage), the temp then climbed to 92* over the next 15 minutes (no revving at all so just letting it heat soak as much as possible), no water pump hurling the coolant round quickly, just idle.At 92* the fans kicked in to their second stage and stayed on, the temp rose to 94* at the EFI sensor for 2 minutes before dropping back to 92*, fans went back onto their first stage and the cycle repeated itself.

After this idle heatsoak test passed i let it get to 92* and then revved the throttle and the temp instantly dropped back to 88* so my cooling system is perfect for handling this v8.

Here is my second test running video, this was early on during the warmup, EFI only at 50* or so.Everything in the bay is still dummy rigged so if things look in an odd place it is only temporary.

http://www.youtube.com/watch?v=iwZLbNwc7_U

I am still getting bad trigger errors during cranking and oddly at no other time? but this will be rectified soon.
 
#41 ·
I have started work on the rollcage/chassis stiffeners part of the project, all tubing is 42mm OD 3mm thick, so far i have made the roll hoop section and door bars which have all been tack welded in place, pics to come after the holidays but in the meantime here is the design i am going for.



Note the triangulation back to the rear strut towers, this is where i think it will be needed most.
 
#48 ·
Pics of the first work that has been done on my rollcage... just basic tacking together and getting it to follow the contours of the body for now, i am going to remove the whole thing and pretty it up before final fitting.







Also need to extend two bars backwards to the strut tops, and also thinking of tieing this into the v8 "box" section.
 
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