Well she lives!!!
Working on it all day to get it started, fitting the oil drain and alternator on was more fun than I expected and had massive panic attacks when it seemed like the oil feed wasnt pumping oil.
Short video of it running, its quieter than when it was supercharged and driving it up the road you can hear the turbo spooling behind you.
Lotus Exige with Rover K series Turbo, low compression engine and chargecooled - YouTube
Next I just need to get it over to a friend to refurb all the suspension, fit the lighten flywheel and ATB diff
Sounds like either a really tight belt or a dodgy tensioner/belt bearing somewhere?? Not sure how much of the TT kit you still have in there.
Are you going to cool the turbo with water, or fingers crossed that the oil will do it? Not the end of the world on a high oil flow plain bearing turbo, not so good on a low flow roller bearing one.
My mate mentioned to me he thought my cambelt was a bit tight but since ive never changed one before I had no reference point on how tight it should be, so I was thinking of slacking it off slightly.
The only other belt is a short factory alternator belt between the alternator and the crank pulley with nothing in between, thats done hand tight, ie pushing it with my hand then tightening the bolt.
only thing left of the TT kit is the pistons/rods/inlet manifold
Something’s definitely too tight or there’s an iffy bearing somewhere in the belt areas.
Water to turbo???
there is no water cooling on the turbo as its a standard journal bearing turbo, but there is a restrictor in the oil inlet to stop it blowing the oil seals out(common issue with ebay turbos)
So you are relying on a restricted oil supply to cool the turbo???
Can you see where this is going to end? Have you improved the turbo retaining panel in the bulkhead, or are you still relying on your helmet/head??
Time for a LHD conversion …and brave/short passengers
The restrictor is what is commonly used on them, of course ideally I would like the full flow of oil, but if it blows the oil seals out of it straight away then theres not much point in that, theres an mx5 in the US running the same turbo with restrictor that he uses on track, autocross, drag etc that has been running like that for 3yrs+
I havent made the brace between the turbo and in the inlet manifold yet as I need to have to pick up points welded into the manifold and I cant weld ALI so they will be done after xmas, my priority at the moment is to get all the suspension refreshed.
Finally pulled it out of the garage and onto the road so i could have my first look at the car to get an idea on what needs doing.
End plates for canards, move the wing further forward, fit my front brake ducts, build my adjustable side skirts and then it needs a good map.
Any houses up for sale in your street ?
I’d like you as a neighbour
Never a dull moment !
10/10 for effort buddy
that rear wing needs to be adjustable tho…
tape some short lengths of red wool to the trailing edge and mount a camera to see if the trailing edge breaks the flow it looks a tad steep to me
haha, well im only in stoke so your not far away if you want to relocate!
The lower element of the wing is adjustable, I just havent got around to doing the top section yet, currently its set at 28.8 degrees which in theory would be its maximum angle for downforce but I wont be running it like that on track as I dont think I will be able to balance it out, ill more likely run it about 15 degrees depending on how it feels in the high speed turns.
I was going to attach a little camera to the wing upright pointing vertically so I can check with tuffs, also get my friend to follow and film it so I can see what the air is doing over the body
It spectacular and rather purposeful. Love the rear wheels. And the woolly gear knob has gone!
Yeh its a shame I cant get fronts in the same correct offset and size to match up.
I tried everything I could to get 16x8/17x9 full matching set of wheels with the correct offsets unless I wanted to spend £2000 on wheels this was the best option. When I repaint them the same colour it should look a bit better.
I actually left the wooly knob on to save the white nylon knob getting covered in oil and muck, I pulled the car out with clean hands so took it off.
Oh yes, JDS, i loosened the cambelt slightly, you were right it was to tight and has quitened down since then.
Gotta respect the Professor !
…
He’s nearly always right
Well plumbed in the boost pipes and to have a look at expected spool times.
In 3rd gear we are seeing 8psi at 3800rpm with a big boost leak and only 70% throttle(need to make a new throttle cable bracket as it doesnt allow full throttle operation) so hopefully with the amendments tomorrow we should get that down to 3500rpm, cant go any further until we put the bigger injectors in.
We will tune it at 15psi and see where we are power wise
Little update.
My sump baffle arrived in the post, looks fairly easy to fit, hopefully it should help keep the oil pickup ok under lateral G, havent really got the money for a dry sump and Ive heard a few issues with the accusump setup
Does anyone have experience with these in a race situation or on slicks? SeanB?
Next I decided to go an weigh it, to see where we are as ive taken alot off but put alot on so…so with no fuel it weigns 710kg which when you think im running a turbocharged/chargecooled engine, alot of aero and much bigger wheels isnt that bad I suppose, I would have liked it to be under 700kg, but ive still got an EP flywheel and a ali fuel tank so that should get me down to 700kg flat, Ive aimed for 680kg so need to have a good think about where else I can remove 20kg, the next thing will be carbon roof then maybe see what weight I can save on the brakes.
Also fitted a turbo jacket that came today to try and reduce some engine temps, only this is, I forgot about the internal wastegate until I came to fit it, so I had to make a little hole for it to pop through, dont know if this will effect anything as heat might be able to get inside the jacket through the hole, soon find out.
Also took the car for a run, used to get a very hot fuel tank from the exhaust manifold heat when it was supercharged to the point where I could actually cook food when driving, I was hoping that running the turbo up top would stop that happening and im happy to say it has, i put my hand on it and its cool to the touch
Just need to wrap the manifold and put some heat shielding on the bulkhead next time I pull it all off.
Be really carefull with the turbo blankets. They can cause far more problems than they than they can ever hope to solve. Wouldn’t allow one on any car that I was involved with.
what would you suggest I do, I cant afford the coatings, it will get very hot so the concern was about cooking the bulkhead, use exhaust wrap?
Already answered you earlier. Move the bulkhead forward, lots of cooling air flow, water cool turbo - appreciate you can’t on the one you have - very carefully mapped.
The heat has to go somewhere, unfortunately all of yours has been trapped inside turbo blanket/heat wrap.
I dont have the ability to be able to move the bulkhead myself, can you or would you be willing to do it?