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Turbo was not broken it was some safety feature inside ECU program which started to limit torgue when speed got higher. We had similar problem already last year when we started to ask for more torgue. Then it was not this rapid limiter. This was working so that there were
- 1.0 bar with first gear.
- 0.7 bar with second
- and only 0.2 bar on third and no boost after that
Now there is again that 1.5 bar which will be risen to 2.0 after I install my bigger injectors. There is still too much back pressure with new exhaust manifold after 4000 rpm it goes abobe 2.5 which will give too hot exhaust gasses and can brake the new turbo.
I will install exhaust temperature meter which will tell if it gets too hot for the turbo.
What comes for the standing mile run target speed is set to 208 km/h for this year.
- I will have about 35 hp more. (target 120 hp and 250 Nm)
- about 60 kg less weight. (830 kg with driver)
- and much less drag
Spare engine will be dismantled next week and full rebuild/ race tune will start just in case if found the breaking point before those power figures on this current engine which has already driven 290 000 km so its not new.
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