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Discussion Starter · #1 · (Edited)
Hello. I am new to e46 and to this forum. I recently bought and fitted a 712 rack to my car. The pulley was making weird noices for like 2 months and it finally let itself go today. My car has a weird setup from myself with CNC made wishbone, angle kit, camber plate and coilovers. The thing that i want to ask is, what should i buy? People says about LF20s LF30s but honestly i dont know. The steering feels very heavy already because of the cambers.. if i go with LF20 will that be a problem? Will it affect its lifespan because of the camber? idk. Enlighten me guys <img src="http://s1.E46Fanatics.com/forum/images/smilies/bluehappy.gif" border="0" alt="" title="Smilie" class="inlineimg" />
 

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Ironman
01 330iT 6MT, 98 M Roadster
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I'm going to tell you to buy an LF30 pump. I've had both back to back. I've read a lot about the difference it feel between them, but didn't really notice anything and I'm pretty sensitive to changes to a car and set-up (long time racer on and off). The reason I will suggest the LF30 is the design of the shaft of the LF20 is stupid. It tapers from over a half inch diameter to about a quarter inch diameter. Why does that matter? They break at the taper. Lots of LF20s break (I went through a bunch on my old E46). Never heard of an LF30 breaking.

The LF30 is a higher pressure pump, so be sure you get the right hoses. They ARE different.

If you want to add a bit more effort and feel to the LF30 you could always buy or make (since you appear to have access to CNC machines) an underdrive pulley. It will take less energy for the engine to power the pump, making it feel like you have just a bit more hp. I used underdrive pulleys on another car (different platform) and the effort didn't bother me either way.

What are you running for camber? I cannot imagine how much camber it would take to add significant effort. If you switch to caster/camber plates, you could tweak the caster a bit to improve the feel. Like everything, there are trade-offs. Honestly, I don't remember them with caster, but I know it can affect feel and re-centering.
 

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Caster creates the heavy steering feel not camber necessarily. In our E30 and E46 race cars I would limit the flow rate to create a heavier feel as it lends itself to more feedback. Are you tracking the car, why so much camber?
 

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Discussion Starter · #4 ·
I'm going to tell you to buy an LF30 pump. I've had both back to back. I've read a lot about the difference it feel between them, but didn't really notice anything and I'm pretty sensitive to changes to a car and set-up (long time racer on and off). The reason I will suggest the LF30 is the design of the shaft of the LF20 is stupid. It tapers from over a half inch diameter to about a quarter inch diameter. Why does that matter? They break at the taper. Lots of LF20s break (I went through a bunch on my old E46). Never heard of an LF30 breaking.

The LF30 is a higher pressure pump, so be sure you get the right hoses. They ARE different.

If you want to add a bit more effort and feel to the LF30 you could always buy or make (since you appear to have access to CNC machines) an underdrive pulley. It will take less energy for the engine to power the pump, making it feel like you have just a bit more hp. I used underdrive pulleys on another car (different platform) and the effort didn't bother me either way.

What are you running for camber? I cannot imagine how much camber it would take to add significant effort. If you switch to caster/camber plates, you could tweak the caster a bit to improve the feel. Like everything, there are trade-offs. Honestly, I don't remember them with caster, but I know it can affect feel and re-centering.
It has 7° rn because my current quarter panels are too low for this setup, I will decrease it to prob 3°.. I will do the math after I grind the panels***x1f601;***x1f601; Do you know what should I buy for the hoses? I will def look for underdrive pulleys, thanks!!

Caster creates the heavy steering feel not camber necessarily. In our E30 and E46 race cars I would limit the flow rate to create a heavier feel as it lends itself to more feedback. Are you tracking the car, why so much camber?
Yeah i am planning to track/drift with it, I don't need that much camber but I had to do it like that because it almost has no gap between the tires and the panel
 
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