Damn i wish money was no object for me too.. haha

 

like i said, road race, all 3 of those motors throw the bias and ditribution off quite abit not just from weight but from placement... and IMO a 500whp ka27would walk a 500whp rb25 in a 240sx

 

the RBs are alot lighter than you think... and i'm sure you could get creative with some firewall mods to get that inline 6 where you wanted it.
(i also think he was talking about the rb26 since he compared it to the 2jz... unless the 2jz just sucks that much...)
the RB actually sits in the engine bay rather well, and if you have the time and money, you can get it to sit in there really nice.
The RB tranny can take alot more than the KA tranny too... its a pretty beefy tranny...

 

not worry about drive line parts thats easy to solve..... he RB somehwer like 75 to 100lbs heavier then the 4's and by the time i spend money rearranging the firewall i could have just spent it on motor work to make the 4's do what the 6's can.

 

point taken...

so are you planning on building it up NA or Boosting it or what?

 

If its a road race car, wait a year to get a VQ37 of a wrecked 'G' do some work to it and have a good amount of power with a 6spd and sink it as low and far back as possible.

Road racing is isnt just about power, Gearing plays a big part in it. with a 6spd VQ and the stock FD of the S chassis it would be a fun car to drive around, and for track time buy a R32 GT-S 4.3 FD and some slicks and have even more fun.

 

a 500whp ka27 would also walk its crank right out of your block with that much vibration and stress from a 101mm stroke.

take a look into the RTR SE-R's with the huge stroked QR25's... let the fact that their 8000 rpm turning QR's require rebuilds after every race because of the RPM they are turning.

Yeah. the crank will spin 8000 rpm all day. It's not doing anything.

connect some 650gram rods and 360gram 90mm pistons along with 125g wristpins and things start changing, in quite a big way.

Oh, so you want to lighten it and do titanium rods??? titanium just beats your poor bearings into submission even quicker; it's like a damn tuning fork. tool steel is better.

Aluminum? have fun on the decel. Aluminum rods are excellent as a spring, they absorb alot of the shock of high combustion pressures, but they need that compresion to counteract the tension on the exhaust stroke.

Good luck. As an owner of a 9600+ rpm SR i can tell you you've got your work cut out for you if you want to spin 100mm up to 8000.

this will probably be happening often: