I think Lexus did a great job on the engine. 5.0L is a good displacement, but like most people have said, torque depends on bore size and also the stroke...F1 cars....small displacement....short stroke....insane rpms....you get high hp and torque.... good example is the M3 engine....4.0L, almost the same power as our F, less torque, but a good fit for our car....

Sometimes there's a replacement for displacement

 

So according to the New Car Features, the UR series have 105.5mm bore centers. With a 100mm bore, that leaves 5.5mm of cylinder wall between the cylinders. 0.2178" is not much at all especially for 600 hp. Did Toyota Motorsports use a Cup bottom end?

 

Want more power? Decrease the weight of the car first

 

Couldn't agree more......there are so many places to save weight on the IS-F


I would start with lighter c/f seats, removal of rear seats, c/f hood, trunk, qtr panels, door panels etc. just like the 0-60 sema car......titanium exhaust, suspension and wheels.......you could easily get this car down to 3300-3400 lbs which would be huge!

 

I weighed mine at the track on Saturday. 3742 with just over a 1/4 tank of gas. The bad news is, even with me out of the car, it's significantly heavier on the driver's side especially in the rear. I was really disappointed to see the stock corner weights. The car needs a lot of work to get anywhere near decent left/right distribution with a person in the driver's seat.

 

^^^^^

How could you remedy this?

 

Ouch!!!

That's because they developed the car on the Fuji Speedway as a right hand drive F and blanced it for the JDM market...

LoL.. j/k

Really weird that the rear drivers side weighs more??
Maybe thats where the majority of the gas was left..

Joe Z

 

So here's the bad news from a scanned image. As you can see, moving or lightening the battery will only make it worse. It is likely possible to fix the cross weights some, but the basic side to side can't be changed without moving stuff around in the car.

From a realistic perspective there's not a lot you can do without compromising the car's streetability.

I saw a nice used 2004 GT3 on Autotrader last night that already has seats, harnesses, and a fire bottle for about the same money as an F. I suspect if I wanted an awesome track car, that would be the easy way to solve this problem. The GT3 I was in Saturday/Sunday at Roebling Road was easily tapping on 150 mph down the front straight. Somehow I'm thinking if the track is the destination, the F isn't going to be the simplest tool to sharpen.

BTW, weights include jack, spare, tool kit, and first aid. If I'd've left the owner's manual in the glove box, it probably would have helped add a little bit to the right side. This car is really nose heavy.

 

what would a m3 read? 51/50?

 

Lobux racer, to bad you don't live in Cali!

You are about 200 years old, when it comes to technical knowledge age

Let me know when you are coming down for a visit!


An e92 Twin turbo x6 engine, would read = Jizz In my pants!

Also a -- would definitely read = Jizz In my pants!

 

You shoulda come to EOS back in 06 Paul...



^That's me at the bottom left, and our very own Lobuxracer on the bottom right...

Javier

 

LOL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fken javy! haha

PM PM PM PM porto miestro!

Pocky staying true to his West Side r000ts, throwing up the DUCE HAHHA