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With the rich mixtures used on turbo applications the oil suffers relatively high fuel dilution. What oil were you using, and what change interval?
I'd recommend something like Motul 300V 15W50 with a 5000km change interval. You also might want to have a look at www.kexel.de and discuss with them how to best protect your crank, rods and bearings from similar damage in the future.
Have you done an oil analysis when you change oil, it would be interesting to see what that shows. I am no expert, but if it was my car, I would change it more often I.e 5000 km and have the oil analyzed.
PS: love your car, you have done a great job.
Have you done an oil analysis when you change oil, it would be interesting to see what that shows. I am no expert, but if it was my car, I would change it more often I.e 5000 km and have the oil analyzed.
PS: love your car, you have done a great job.
Thanks, good advice. Really appreciate people thinking along. The guys who service my car in The Netherlands already told me I should rebuild as a precaution but I thought I would last another 40,000km. Being stubborn cost me a lot more than necessary.
I have to make several decisions now and its not easy.
For instance, the water-cooled intercooler hasn't been the best quality we found out. First of all the inlet temp was high and secondly we couldn't find any leaks but I kept refilling it. Not the best system.
So an option is to do it right, get a much larger and modern cooling core in (2x1000hp Garret) or pull the whole water system out and mount a air-to-air intercooler. Perhaps with a wing.
Although I never liked a wing the downforce would be a nice tradeoff.
And here's the thing. Mounting a wing might push me to going wide....haha
The old Castrol RS 10W60 is a very good oil, this was later rebranded Castrol TWS...and more recently has become Castrol Edge.
To make matters complicated Castrol also sells Edge Sport, which is not a true synthetic.....Edge is BMW M approved, Edge Sport is not.
Anyway about running a spoiler, don't do it as it does exactly that...spoil. ;-) Did you ever have a look at these guys http://www.chargecooler.co.uk ? They supply Koenigsegg, Hennesy, SSC.
Or at least PWR, the manufacturer of the barrel cooler supplies those mentioned above....and Red Bull racing.....and Porsche, their website suggesting they were involved in the 918.
I am NOT an engine builder, but I have read about 993 NA-TT builds using certain camshafts to lower the dynamic compression ratio, without changing the static compression ratio. Might be worth exploring with your builder if you want to avoid buying new pistons.
Static compression ratio is defined by the volume of the cylinder at top dead center vs bottom, which can only be lowered by removing material from the head, or changing the pistons (or, theoretically, the stroke via the camshaft of connecting rods, but not practically.)
Best of luck with your build. And for what its worth, I would like to echo others opinion to look into different air to water intercoolers, as they are becoming more and more common in modern applications. There ARE good products out there. I believe 9meister has used them in the past, maybe try reaching out to them.
as mentioned I think it had to do with the oil supply to the crankshaft, as the supply on the GT3 cranks in vastly improved. I believe this was the cause. In line with that though, I do not recommend a 4.0l build as I have. It has taken years and it's still not finished. I'd recommend sticking with the 3.8.
If decided though, at least I could offer you the necessary price without the damn extra costs I had to pay.
The oil. The Castrol is fine in my opinion as you have a second oil cooler, but I do recommend to change any oil after 5,000km on your engine, because of 2 reasons. 1. Track use 2. it's a turbo and its used to cool such.
Better 10w60 would be the Rowe Hightec, with the best HTHS of any 10w60 or the Millers Nano.
The 15w50 Motul 300V is also fine, but again the oil was not the cause.
The attached pictures is from this forum, but I do not recall who posted it. you can see that the oil has these channels to flow on, seen on the crank in the rear.
this is my gt3 rs 4.0l crank, but I guess I have shaky hands so its more difficult to see this.
As Tjb616 has suggested a dynamic ratio will be a better measurement for your turbo engine. A longer duration cam rather than going for lift will give a much lower dynamic compression ratio. Especially usefull in a lower revving high compression turbo engine!
Can't help you with the compression ratio, no experience with turbo engines.
But Wolfie wouldn't be Wolfie anymore with wings and widened wheelarches.
Stick to the standard Carrera small body!
That's what makes Wolfie so special
07-16-2016, 11:58 AM
