Hello fellaz... I’m planning on buying a Lexus ISF soon... However I’ll be building it into a BMW killer, Ik it might sound preposterous but with less weight and more power it can be done... My question is - Is it possible to make 800hp at the crank on a ISF ? I have seen the maximum horsepower rn is 725hp and 650 at the wheels

 

Yes, this is a cost no issue thing though right?

Speed and power is directly related to how much you are willing to bankroll the build.

 

You can make it a 1000whp. Only problem is how deep your pockets are. Plus you don’t need 800hp to make it a bmw killer. I beat M4, M3 and bolt on 335i’s and I’m only FBO+tune.

 

Anything can be made fast with a pile of cash. Just have to have the pile of cash first

 

The numbers you have seen are made with the products currently developed to offer the highest power. That’s the stage 3 RR supercharger. There is currently nothing available that makes more power. It would have to be custom to go higher, and you will be in uncharted waters. The last RR reported, the valve body on the trans needs upgraded beyond that. There is currently no upgrade available. They have a bigger blower, but you may struggle to fuel it as well beyond what they have tested.

Nobody knows the true limit of the drivetrain yet, but some guys are cracking ringlands after boost, and some are not. Some speculate it has to do with whether the engine was ran hard without an oil cooler upgrade, as these cars can really heat up the oil in stock form on a road course. That would cause the oil squirters to not cool the pistons as efficiently, causing swelling in a tight tolerance engine. Our pistons are not forged, which is a bummer and makes them a weak link.

If you want product help, RR is a good stop. I don’t know of any other company boosting this platform. Otherwise, get out your welding gear and start designing a custom kit. Let us know how it goes, and start upgrading your car with heavier duty parts.

 

Didn't somebody twin turbo one (to the tune of 1300 hp) in the Middle East and then promptly wrecked it during the first few drag races?

 

Not sure of the horsepower numbers, but otherwise yes

https://speedsociety.com/lexus-catch...ps-over-fence/

 

Speed costs money. How fast do you want to go?

Horsepower comes from YOUR gas tank.

Once you get into the 600+ hp range, your fuel options narrow quickly. You're not going to get 800 hp running pump gas, or even 100 octane pump gas. Compression is too high for that. You'll need alcohol of some kind to help manage detonation. This isn't a great choice for your project. The aftermarket for these cars and engines is tiny, no one races them seriously outside of Gazoo Racing, and there's just nothing available so you'll be charting your own course. Hopefully you'll also have a DD. If you don't be sure to buy some good walking shoes and credits with Uber/Lyft for when it isn't running.

 

are you assyrian?

 

Are you assyrian?

 

I read that is a tubed chassis drag car. It’s not really an ISF anymore, and I highly doubt it has the 5.0.

Please correct me if I’m wrong.

 

correct. Just did a little digging and it was a 627 cubic inch engine. Not the 302 the isf comes with.

 

Yes, powertrain swap with a bag of money.