Prism7guy's track car

[Prism7guy]

Update time again.

Due to oil temp issues at the last trackday i decided to go overkill and get a 30 row oil cooler for christmas.




I've plumbed it in so that the oil goes: Sump>Pump>30 row cooler>Laminova>Remote filter>Engine>Sump.
That way the oil should be quite cool before going though the laminova where that will then hopefully stick some heat back into the oil before its filtered then fed back into the engine, this should also help bring the coolant temp down a bit too as that had started creeping above 100c at the last trackday.

To help combat the coolant temp issues i decided to make a shroud around the radiator to force more air through.











I've also made a shroud for the oil cooler but didn't take any photos of that, basically any air that goes through the grille or foglight opening on the offside of the car pretty much has to go through that cooler. The clearance between the tyre and cooler is pretty minimal, but there shouldnt be any contact under any conditions - I've checked that

The latest supercharger sounded a bit rough by the end of the last trackday, i wasnt sure on the cause but it sounded like it was grinding.
I've removed that and stripped it down, i can't see any evidence of it trying to hit itself so i'm putting that down to worn bearings, the clearances all measured as they should.
In order to try and be a bit kinder to the superchargers i've decided to fit an auto tensioner and also add a polyurethane coupler to the drive pulley to help damp out any crank vibrations etc.





















I've also made some special locating spacers to try and hold the rear mounting point of the wishbones more securely to the subframe, once again i forgot to take pictures of them though.

Next project was to try and salvage the previous two superchargers. I stripped them down, decided that i'm not in a position to replace the rotor pack bearings under ideal circumstances without having to get some parts laser cut (which would mean minimum order charge and make it unaffordable, and also require some work on the rotor pack housing which i'm also not in a position to do at the moment). In an ideal world i'd have replaced all 4 bearings and two seals, but hey-ho.
I cleaned 0.2mm off the end of the damaged rotors (inlet end), and removed the burrs from the internals of the housing.

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Rebuilding the 'chargers:







Did a little porting on my inlet for the 'chargers, much smoother than before hopefully getting slightly better airflow.







I noticed at the last trackday that my header tank had almost emptied itself, and left evidence of coolant splattered around the engine bay. I'm assuming its because it was running so hot causing expansion. To combat this i've decided to add a small expansion tank. By this point i was running a little low on cash so had to improvise





Also bought and fitted a cheap nasty boost gauge to see whether my dump valve isnt able to clear enough boost at high revs which could cause a pressure spike and force the supercharger rotors down into the housing at the inlet end.



And all back together.



I managed to get all the above done in preperation for the PSCUK sprint day at Curborough, a few pics from the day:









I was having issues with my GoPro so ended up with loads of photos and only one in-car video, and a few drive-by videos recorded by my mates. It was a good day out and the car performed pretty well to say i was just using the Pilot Sport 3's i'd drove there on.

https://www.youtube.com/watch?v=1_L-HL72...e=youtu.be

https://www.youtube.com/watch?v=kW3A9kw8...e=youtu.be

https://www.youtube.com/watch?v=CIqJtHQ-...e=youtu.be

https://www.youtube.com/watch?v=it67eZSo...e=youtu.be

That's about it for updates for now i think, I'm in the process of sorting out a proper heater for inside the car to stop it steaming up so badly when it rains, and i've got some new wiper blades with washer jets built in as the tubing leading to the jets in the bonnet keeps melting and just generally being a pain to live with when wanting to remove the bonnet on my own. I also want to try and sort some of the knocking noises coming from various suspension bits, think most of the joints are getting worn now.

Next day out for the car will be Cadwell park on the 22nd