Yes, but nobody believes them.i can get some cams cut for around 2k. there's already a company making that much power on the 250 with a supercharger. i realize that there's been people in and out of your lives filling your heads with empty promises. i have the knowledge to make your dreams come true. as far as the pistons go there 10.5:1. not too much lower but the stock block is only good for about 14psi anyways.
YouTube - RGMotorsport's Supercharged Lexus IS250
280kw = 375.5hp
375.5hp vs 306hp
There again- what's going to run the motor? The Lexus ECU can't be reprogramed, and you can't use the ECU from a different car and get the rest of the OEM systems to work.as far as the pistons go I'm not sure if I'm ready to release that info at this time but ill give you a hint for shits n giggles... 2010 fj cruiser has the same bore as the is350 and is a 1gr-fSe
so you should be able to use the rotating assembly in the 1gr-fse to yield a 4.0 is400 ill be offering a kit for this as well.
I'm still not following how you're getting 375 out of the 2.5L on 7 psi.yup. do 10.4:1 keeping the spark the same and adjusting the fuel will take care of your knocking issues. leaving the limitations to the oem fuel system and the block as long as meth injection is used. im working on engine management now. hopefully ill know something this week. once timing is figured out ill have the 2.5 close to the 375 range. i am working with alot of limiting factors, but i have some big names to back me up so im not worried about failing. even if i have to stroke it to a 3.1
i will get a set of these 9:1 pistons and show you that this is all possible.
modding these cars will be alot easier then you think.
Why do you say with such confidence that the motor can't handle the boosted platform? Do you know how these internal cast iron pistons are manufactured and why they're much higher grade then a regular cast iron piston?Please re-consider this project, it is not worth the time and money. Not to mention the transmission nor motor can handle large amounts of power, the IS250 was designed as an economical daily driver. If you want boost I'd recommend starting off with an ideal platform like the IS300. The IS250 will only hold you back and empty your wallet.
But if you do get this done I will give you all the respect in the world, good luck!