LSD for AutoX

[F34R]

LOL. seriously? Go back and think about that one for a second, and why denser air actually makes more power.

I've done my homework on intakes, I'm not saying don't do one. But on a 100% stock motor it's a waste of time for the most part. You need to be making ~30-50hp more power than stock for a larger filter to make a significant difference (more than a couple whp). And it's the larger surface area, not some magic "cold air" bullshit that makes a difference.

Never stated on a stock motor. My m20 is far from stock.

Also the stock box has a small hole to suck in and then a box and a barn door to pass through. I know for a fact that the miller MAF is better in every way then stock. I am not saying a cone and a tube to the fender makes worlds of difference. But I would take it over the stock BMW box any day. I am sure you would also.

For anyone wondering the benefits of the MAF:

http://www.millerperformancecars.com/component/content/article/906/24-mass-air-flow-conversion-faqs.html

[nando]

so no comment on denser air making more power because "it burns faster?" ;)

the stock airbox and AFM are *just the right size* for the stock motor. Do think BMW engineers are retarded, and they didn't realize just making a bigger hole would give the engine more power with no other drawbacks?

So you've made the airbox and AFM less restrictive, what about the throttle body, intake manifold, head, cam, and exhaust? These things are all designed together. Peice meal upgrades are a waste of time, which is why swaps are so popular.

and I wasn't arguing against a MAF. Also gains with the MAF include tuning, which is where most of that power is coming from.

what is far from stock btw?

[CrazyB]

I am currently running the miller with the stock box and a K&N drop in filter and the difference is huge. most of the difference does not come form the intake setup but by getting rid of the restrictive AFM design.

[call me jack]

LSD will help, quit a bit, but you'll need to be more precise with your throttle input, or your really going to be sliding.

[nando]

I am currently running the miller with the stock box and a K&N drop in filter and the difference is huge. most of the difference does not come form the intake setup but by getting rid of the restrictive AFM design.

most of it came from tuning as I said. The benefits of the MAF are mostly in transient response and smoothness. The flow gains from removing the AFM are pretty small on a stock motor, less than 5hp.

[CrazyB]

Well found a local 3.73 lsd in good shape, will try and grab it today. And will see this Sunday how much of a help it will be. its will be interesting as I will be running at great America again this Sunday so it will be nice to really tell the difference between lsd and open diff on same pavement.

[nando]

Well found a local 3.73 lsd in good shape, will try and grab it today. And will see this Sunday how much of a help it will be. its will be interesting as I will be running at great America again this Sunday so it will be nice to really tell the difference between lsd and open diff on same pavement.

sweet. I'm sure it will be a huge difference. Nothing worse than an open diff, except a FWD car with an open diff and unequal length halfshafts! :p

[Ian F]

LSD will help, quit a bit, but you'll need to be more precise with your throttle input, or your really going to be sliding.

I would tend to agree with this. My car does have the LSD rear, but with the shit tires I have (205/60-14 ES100's), if I try to get on the throttle too early or too hard, I come out of the corner sideways at best, and backwards at worst. Even with a stock M20 with only a cat-back, the margin for error is a bit narrow.

The fact the car is loose w/o a LSD is a bit odd to me. The past RWD cars I've had w/o a LSD, the inside rear tire would lose traction and spin, but only if there was limited traction overall (wet road) would the rear end step out.

[CrazyB]

Yeah but it is a little different when you are on a auto cross course, as the entry speed is a lot higher than on a street so even with an open diff you will get sideways.

[Wh33lhop]

I would tend to agree with this. My car does have the LSD rear, but with the shit tires I have (205/60-14 ES100's)

lol, what are you talking about? Those are awesome tires! :p

if I try to get on the throttle too early or too hard, I come out of the corner sideways at best, and backwards at worst. Even with a stock M20 with only a cat-back, the margin for error is a bit narrow.

The story's different when you're already using most of your rear tires' circle of grip. It's just a lot less predictable.

Never stated on a stock motor. My m20 is far from stock.

Wait, so you're talking to someone with a built motor (I assume that's what far from stock means, right?) and the first thing that occurs to you to say is... "hey you should get an intake"?

[CrazyB]

Was wondering what fluid would you guys recommend I run in my newly acquired LSD?

[F34R]

so no comment on denser air making more power because "it burns faster?" ;)

the stock airbox and AFM are *just the right size* for the stock motor. Do think BMW engineers are retarded, and they didn't realize just making a bigger hole would give the engine more power with no other drawbacks?

So you've made the airbox and AFM less restrictive, what about the throttle body, intake manifold, head, cam, and exhaust? These things are all designed together. Peice meal upgrades are a waste of time, which is why swaps are so popular.

and I wasn't arguing against a MAF. Also gains with the MAF include tuning, which is where most of that power is coming from.

what is far from stock btw?

Indeed, everything is in hand with the others.

I have headers that dump into single 2.5 muffler, cat delete and a borla type muffler. CAI that is into the fender via a modded AEM tube.

I had a ride in an e30 with the same type of upgrades as mine but it had a miller MAF and war chip. I wanted to get it once I got home but...cost too much to waste on since I am almost done with my m50tu.

I was not arguing over the miller MAF, just letting others know what it does.

And with colder air it is more condense and will therefore add more o2. I am not 100% on the effects, I just know you put down better times in the morning than in the evening. I could go read up and know 100% on the effects, but I really don't care too much.

[F34R]

Was wondering what fluid would you guys recommend I run in my newly acquired LSD?

Royle purple or Redline

[Wh33lhop]

Was wondering what fluid would you guys recommend I run in my newly acquired LSD?

Redline 75W90 LS (not NS) or Mobil 1 75W90 (which I was able to find at Kragen, make sure it says it's ok to use with a limited slip diff as I'm not sure if they have two different kinds).

And with colder air it is more condense and will therefore add more o2. I am not 100% on the effects, I just know you put down better times in the morning than in the evening. I could go read up and know 100% on the effects, but I really don't care too much.

Well, you should, as that is kind of Car Enthusiast 101 material. IATs are important.

[Ian F]

Yeah but it is a little different when you are on a auto cross course, as the entry speed is a lot higher than on a street so even with an open diff you will get sideways.

I am on an auto-x course... that's pretty much the only time my car gets driven... :(

I spun my Spitfire (no LSD) a couple of times in auto-x as well, but it seems the E30 goes sideways much easier.

Yeah... I just love those ES100's... no matter how many times I spin, they don't seem to wear down at all...