There must have been some serious issue happening to damage a forged piston at such low boost for moderately sized turbos. I'd go with your assumption about injector issues. Magic Mike had a similar failure, funny enough with the same brand of pistons and turned out to be an injector seal.
Was also low on oil at one point so that could have lead to pistons getting hot as well. Never mind it's dead so time to fix On the subject of oil: I cut this out: And put this in: I did that because this is stupid: The sump extension would be to the left in that picture, there is a ~ 5mm high lip around the extensions entrance. No big deal until something goes wrong & you need that last 100mls of oil. Also added this small baffle to slow oil from surging out of the sump under heavy brakes: Will be doing a couple of other tweaks when I can be bothered
Mungyz, you should also consider a Petersen Accumulator as an alterntive to a full dry sump - these things are cheap insurance against oil-surge in the sump. I'm impressed with the levels of energy implied by the quality of the outcome .. top job mate ... pity about the pi55ton RB
Thanks man. Yeah I am looking at options along those lines, will be upgrading to a proper oil cooling system instead of the current hybrid I have. I was thinking of increasing oil capacity in the sump but weary of just creating a place for the oil to run to mid corner.
I have a 3 quart Accusump for the race car. Shouldnt need extra sump space if you put an accumulator in.
Yep, just need to remember to add another 3qrt's of oil before you start it The Accusump's gobble it up quick when empty
I have been busy going over things I have always wanted to sort out but not had the time. New ally air intake pipes: These go well with my dual intake ally pipes I made ages ago: Intercooler pipes next
2.5" it's about all that will fit under the headlamps I think - maybe 2.75" at a pinch. I might look in to that actually
thats what i thought, didn't look properly at which pipes you had done, i'm leaving the stock intake pipe but jumping up to 2.5" for the intercooler and throttle body piping
So I did the passenger side cooler to throttle pipe today, the factory one only weighs 1030grams according to my kitchen scales Based on other tubes I was expecting more. Still the new ally one weighs 380grams so considering there are four pipes all much the same I should loose approx 2.6Kgs from just those four pipes The ones I made form under the headlamps saved ~ 1400grams & the ones from the turbo outlets were about 500grams each (guessing). So all up that removes approx 5Kgs from the front of the car, dollar per Kg that is not a very good ratio :rofl:
Did a little autopsy a couple of vodkas ago & found the recommended piston to bore clearance for the old pistons 0.12mm. I checked the size of my bores and found it only had 0.02mm piston to bore clearance :bash: Gee I wonder why the piston craped out :bash: So here is my theory on the chain of events: 1) Motor built with wrong p to b clearance 2) later motor gets a bit warm & the piston starts to pick up on bore The extra heat from the extra friction creates detonation which damages the top ring land & more of the skirt & bore. this compounds until... 3) The damaged piston now creates excessive blow by which when added to the extra heat from the tight pistons cause a PCV fitting to come adrift resulting in the loss of ~2L eng oil. 4) The loss of the oil pretty much finishes off number 5 & 6 pistons & kills a couple of bearings, motor is now noticeably nosey & smoky = game over, time to repair. All coming from a idiot failing to follow the manufacturers & the customers instructions :bash:
Bit of a shame, Its things like this that stop me from paying so called experts to do most stuff these days. Plumbers, electricians, etc etc. If somethings is gonna stuff up I would prefer to make the mistake, NOT pay someone to screw it up for me.
Agreed My wife & I (mostly I) have been buying up all sorts of gear lately so we don't have to involve other people in our projects. It is disgusting how unprofessional some of these so called professionals are It should work in my favour now with the new pistons, the bores measure almost exactly what they should do for the new ones - we will see when I get them tomorrow Oh & I did some maths & the new piston & rod combo should be ~ 400 grams each lighter than stock = more power!!!
Yip Stock piston and rod assembly with no bearings was 1270 grams with a bit of crud on there. Eagle rods are 580 grams & Wiseco pistons are 343 grams in 88mm = 923 grams I just spotted an error in my late night maths so difference is ~350 grams not ~ 400 But still significant & will make a difference with power (Obviously the above is all rough maths just to get an idea & the stock combo would be a little lighter if clean).
Got a phone call from the guy balancing the crank etc today, turns out #6 big end journal has a tiny crack in it It is very small & runs along the axis not across but just to be safe I wont use that crank. So I gave the original crank a good going over in the same way I had done on my spare one - I checked very very carefully for cracks first Obviously most will have figured out that seeing as my crank was being balanced I have my new pistons & rods etc If I can clear a time slot I may be able to start putting the beast back together some time next week
