245 GL -90 "B6284T" and 245 GL -88 "B6284T"
Long time no update and boy it's a blurt. It's not worth one car but two
Summer included mostly driving. Old rear upper poly bushings gave up completely. One cracked through. Replaced them and encountered a problem. New bushings were softer than old beaten ones with extra thickness on sleeves. Driveshaft took contact with floor while accelerating hard. Before I had time to get new 3mm thicker sleeves machined, I put poly inserts in rear axle bushings. This eliminated the driveshaft problem completely. I did of course install thicker sleeves to rear upper bushings too. This made rear feel quite good.
I was looking for thicker sway bars and IPD was almost only offering ones. Bought 25/22mm set and the little I have driven with it gives a nice feeling. Haven't yet had possibility to push hard enoug to really feel the difference between old ones(24/19).
What else? Well I did do another standing mile run last Saturday. Didn't go even close as planned. Pull felt ok but not too good. Just around finish line started to behave like engine was on rev limiter but harder. Few seconds later coolant came through exhaust. Well, at least it did 290kph/181,25mph
Laame.
Videos of how it looked and somewhat sounded:
Incar:
https://www.youtube.com/watch?v=PvY4jP3_H-Y
Outside:
https://www.youtube.com/watch?v=Fp_kApLR5yg
First I thought that another of two main pumpus did not give enough pressure but after taking head off it looks like cyl. 5 injector failed causing hard knock/etc. Not much to do. Plug melted and cylinder head melted between exhaust valves and another valve broke. Cylinder has deep scratches and there is a doubt that if sleeve has cracked. That because gasket is not broken. Haven't opened more yet but piston is done of course. Such is luck that the piece of broken valve did not hit turbine wheel at all.
Few pics
here.
And picture of the plug(up side down):
New engine will be just about the same. I'll just have to take the block and such from spare parts car. Heads I have lying around, one will have a small port and valve job. Lets see if I will now buy better egt sensors, old ones were too slow to begin with. That is that for now, new updates will occur when there is something to say.
But before that I'll just leave some more text here.
Bought a second 245 with an ok body a couple of months ago. -88 GL, B200E and M47 with 177000km/110625miles in odo.
Outside pics
here after buying and after some small mods.
After a week started happening a bit. Used another week to put a "B6284T" in it. Same stuff as -90 first engine.
B6254 block, T6 pistons, H-rods, B6304 crank, 204hp cams, MS1 V2.2(changing it to MS2), 870cc injectors, etc..
5-cyl flywheel with M5 -765 SRE pressure plate. First had M90 with T5 disc, now it has BMW GS6-37DZ with modified bellhousing.
First turbo was KKK K27 with #11 exhaust which was way too small. Then it had 55/64mm HX40 with 19 exhaust and it was quite nice. Now it has 60/67mm HX40 with #19 exhaust. Both HX40 make 1,3bar at 4200rpm, smaller just started giving boost earlier and was better for all round driving. Now I have done the beginning of the downpipe three times
Fuel lines are still stock from tank to main pump. Moved filter next to main pumpu and changed feed line to 8mm hose. Ithelped a little with fuel. I'll most likely update the whole line later, isn't enough for E85 yet.
Suspension is still quite basic stuff, haven't done "much". Shortened old stock front shocks, shortened front springs with 14.5mm wire. Stock rear shocks, shortened HD springs. Adjustable shocks are coming from GAZ. Polybushings front, rear upper and panhard. Poly inserts with NOS rear axle bushes. Sway bars from -90, which means 24/19.
Changed rear axle from -93 245. Was 3.73 and now is 3.54, much nicer to drive. Changed also rear seat from -93, just to have headrests. Will change electric windows, -mirrors and central lockings from it as well.
Some pictures of the build
here.
Had it of course inspected and it's fully road legal
At the moment it has around 460hp and 631Nm at 1,3bar boost with E85. Maybe more after fuel line update and new injectors... A new daily driver