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Well. Today hasn't gone great.
While testing, the supercharger broke apart. A rotor destroyed itself for no apparent reason, and fed the engine chunks of metal.
I do not believe this was of any fault of the tune, afr was perfect, timing was perfect. The supercharger likely could not take the added heat.
I'm going to pull the motor, and just decide where to go from there. Unless the supercharger had a failure for some other obvious reason. Likely I will just go turbo only.
Man, sorry to hear that. We were all following your build and hoping everything would work out right. You still get a BIG thumbs up for blazing the trail and taking the risk. I'm sure your next version will be even better!!
You should move this and merge it with your other thread...
BTW, were you placing the turbo before the supercharger? Intercooled between turbo and super, and then intercooled again after super? Or none of the above?
Wow, sorry to hear this.
I know the feeling, having blown up a 2.5L 911 Race engine a couple years ago.
It was the most exotic engine I've ever built, with Pankl Ti Rods, and all the really good stuff.
Probable cause was the GT3 oil pump, that drew so strong from the oil tank as to collapse a -16 Aeroquip line.
Fortunately, that was only the 2nd Race Engine I've ever lost since 1975.
Turbo charging an NA engine sounds like a good way to go.
Low Mileage Rav4 2GRFE engines can be bought for less than $3K.
The Rav4 2GRFE has the oil/water heat exchanger like the Evora, where the Camary's does not.
Oh man, I didn't realize you were going twin charged. Perhaps too much pressure hitting the supercharger rotors?
The guys at MonkeyWrench Racing seem to have a lot of 2GRFE parts and bits if you need to cobble together an engine. They sell built short blocks and other misc parts. Good luck and thanks for experimenting. I'm very interested in a turbo set-up down the road. Only got 2K miles on mine so going to enjoy it for a while.
There is a thing in Dallas and Houston, where videos taken of street racing and hooning and such are always said to be "filmed in Mexico" when posted on social media, supposedly to prevent if from being used as evidence.
So it's been a running joke amongst my friends to go to car meets with sombreros or ponchos on. barely fits on me in the lotus.
My dealer (a Lotus race team) figured that out a long time ago. The stock TVS1320 supercharger is already at thermal reliability limits at 350hp (for track use) and their only recommended way of reliably upgrading the power is to switch to a TVS1900, or implement some sort of charge-cooling system a la the Evora 400's Edelbrock unit.
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