![]() A very big waste gate would be needed closed at 1.5, yet fully open at 2, and in turn also be fed into the big ones exhaust inlet. If the small one would be at 1.5 and the big one at 2 bar for example, otherwise the small one would surely reach breaking point rpm at 4000 engine rpm orso. I would think it should at least start to be waste gated at 0,5 bar lower than the big one. Not cheap, but possible.Īs with the nizpro in the picture, I would think the small one would need to be exhausted though the big one. It will probably break more than temptation island. A check to sadev for a 4 x 4, 1000 Nm gearbox would be advisable though. With this in mind, a 2 liter with 600 bhp's that doesn't have a turbo lag of 2 months, would not be very hard. The very big one would then react on this volume and start at say 3000 (up to 8000), whereas it would have only started spinning at 5000 without the small one. Sticking to a 2 liter inline 4 as a reference, a very small one could spin as early as 1 bar rpm and perhaps 1.5 at turning the engine into a 4 to 5 liter from than point on. I would think this would be an excellent idea. Probably because my idea is hard to get right and expensive, but even in racing it's rare (I think) I've seen small/big combo's, but almost never a big difference and mostly parallels. I've been thinking why one almost never see's very small turbo's next to very big ones sequential or compounded. I would like to bring an idea past you and see what you think. I hope this is allowed since there's not much F1 relevance:įor yours I'm walking around with the idea's what to do, should I ever win the lottery.
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