I'm wanting to run a turbo kit in my 01 RS safely and want to know what other parts you guys (and girls) think would be necessary to have using a lude speed stage 2 kit. Thank you in advance for any and all replys.


P.S. I tryed searching for threads about the lude speed kit but got nowhere sorry if I missed it.

try searching as ludespeed (one word) also check the sticky thread at the top of this forum, it's long but there's a lot of info about what you need for a turbo kit.

eli

I dont know ho to work on cars

Read these 2 threads...

http://i-club.com/forums/showthread.php?s=&threadid=115053

and

http://i-club.com/forums/showthread.php?s=&threadid=146439

the only necessary parts I can think of
2.5in+ cat back
sparkplugs 1or 2 heat range colder
gauges

Don't forget the extra engine. ;) J/K

Eric

I'd step up for the stage three! That's what I'm running! Very nice kit!!!:D

no more off subject please

1.new clutch
2. plugs should come with the kit
3. gauges. (i have egt, and fuel pressure, boost comes with the kit i think)

do yourself a favor and get a flywheel and tranny mount installed with the clutch.

Those who are running ludespeed kits, have youreplaced the connecting rods with shorter ones to lower the compression ?
How much boost is safe for 2.5L engine with compression lowered to say... 9.something ?

Originally posted by il96
Those who are running ludespeed kits, have youreplaced the connecting rods with shorter ones to lower the compression ?
How much boost is safe for 2.5L engine with compression lowered to say... 9.something ?

you would want to have low compression pistons, not rods. a shorter rod would do more than reduce compression because there is a relationship between the stroke and rod length that is important. i dont know too much about it, but there was a scc arcticle about tuning the impreza a while back that talked about it. you may be able to search here for it.

as far as the need to lower compression, i dont think it is necessary until you are running near 10 psi. im not exactly sure, but you should be able to run 7psi at sea level as long as you have some timing control or a j&s. the new j&s would be best since it can retard according to boost level. maybe others w/more experience with boost can elaborate.

You need to replace the pistons, not the rods, to lower the compression. The motors are such that the stock rod length allows for very little clearance between the piston and the bottom of the cylinder, so your only choice is a dished piston.

9.something is rather vague. Stock for MY00'01 is 10:1, stock for MY98 was 9.5:1 (IIRC), and stock for MY99 was 9.7:1.

It really all depends on the tuning to get the most out of any motor and keep it reliable... I have run 2psi as effeciently as a new stock WRX runs 14psi (neck & neck to 110mph from a stop) with the stock 10:1 bottom end.

Fuel Management!!!
1.) Parallel Fuel Rail Mod
2.) Bigger Injectors
3.) Bigger Pump (I believe it comes with the Stage 2)
4.) FPR

Parallel fuel rails is a must!!!!
I recomend Shiv's kit! Very nice!

Does anyone know the times or gaines for the Ludespeed stage 2? I am also thinking about this too.

Originally posted by 8Complex
You need to replace the pistons, not the rods, to lower the compression. The motors are such that the stock rod length allows for very little clearance between the piston and the bottom of the cylinder, so your only choice is a dished piston.

9.something is rather vague. Stock for MY00'01 is 10:1, stock for MY98 was 9.5:1 (IIRC), and stock for MY99 was 9.7:1.

It really all depends on the tuning to get the most out of any motor and keep it reliable... I have run 2psi as effeciently as a new stock WRX runs 14psi (neck & neck to 110mph from a stop) with the stock 10:1 bottom end.

Maybe I'm not understanding something, but what's the difference ? A connecting rod of length Lc pushes a piston of length (height) Lp, so by reducing either Lc or Lp one can achieve lower compression.
If you are saying that i'm not going to have enough clearance at the bottom, how will aftermarket pistons help ?