4.1 lsd slowed 325e down - Page 2

tlaselva · 02-18-2004, 12:42 PM

With a shorter gear like a 4.10, you’re trading road speed (HP) for pulling power (torque).
Car's with high HP ratings, like M3's and Vettes, usually can gain some acceleration buy going to a lower gear, but at the sacrifice of top end, if it's not already limited buy aerodynamics. It's because they already have alot of HP, and loosing some isn't a big deal.

IMO, a 4.10 gear is way to low for a ~200 HP car though.
You’re having to shifting sooner while you’re accelerating, too soon.
Lots of torque, but lost too much HP.
If anyone's driven a diesel, you'll know how it feels like.

Digitalwave · 02-18-2004, 07:22 PM

Quote:

Originally posted by BMW_M52_M20
A chip will bring an ETA up to 200lb/t, those engines are highly underated.
Jay

Heh, sure, whatever you say...

chromius · 02-18-2004, 07:28 PM

Quote:

Originally posted by Digitalwave
Heh, sure, whatever you say...

he's actually pretty close about that...the average increase in tourque for a chiped 325e is 20ft/lbs so 174+20 =194 pretty close to 200

Digitalwave · 02-18-2004, 07:37 PM

Do you have dyno charts showing that the 20ft/lb increase is at the peak though?

chromius · 02-18-2004, 07:47 PM

I think Dinan has some on their site, but either way, stock the peak torque is made between 2000-3500 RPM on an "eta" engine anyway. even then the torque curve is relativly flat across the entire RPM range, thats one of the beauties with the eta engines.

Eurostyle · 02-19-2004, 02:10 AM

Quote:

Originally posted by Digitalwave
Do you have dyno charts showing that the 20ft/lb increase is at the peak though?

Yes, i'm looking at the graph right now! Peaks at 3500RPM, with the chip it just over 190ft/lb and with exhaust it goes very close to the 200 mark...

BimmerKris · 02-19-2004, 02:51 AM

nice

torque is the greatest invention ever

objec · 02-23-2004, 02:52 AM

about the welding up of the gears on the open differential, how well does that work has anyone tryed it, what gears exactly do i have to weld up, i have though about this befor but was not sure if it would work well.

BMW BMXer · 02-23-2004, 02:57 AM

Weld the spider gears.

Only drive straight.

BMW_M52_M20 · 02-23-2004, 03:14 AM

Quote:

Originally posted by Digitalwave
Heh, sure, whatever you say...

, lets see, uh go look at the Jim comforti chip, the dinan chip, they all show dyno proven results......and all of these are acclaimed companies with excellent products.

The eta's make a big difference with a chip, just look at how underated the engine is with a 2.7L (bigger then your engine) and the stroke is longer, so only producing 121bhp stock and 170lb-t stock out of a 2.7L, 6cyl, there is obvious potential, which is why the chips make a difference remapping the computer and adjusting fuel/air curves and mixtures. The chip does more for my model then yours, if it was 10bhp and 10lb-t I wouldn't even bother with a chip.

I don't need to convince you, go to dinanbmw.com and look for yourself.
Thank you and **** off.
Jay

chromius · 02-23-2004, 04:12 AM

Quote:

Originally posted by BMW BMXer
Weld the spider gears.

Only drive straight.

LOL Thanks man, I needed a good laugh....I would love to see objec try and turn a corner with a completely locked diff in his 800hp M3

and BTW regarding the chip, even if the HP and Torque isn't at the peak, which for the most part it is at like 3000 RPM, you would still be gaining the power somewhere along the curve, and it all depends on what you want, personnaly I don't want all my power at 6000 RPM I want the power where it is used most ie.2000-4000 RPM just about the range a typical car is when its pulling out of a corner, the more you can raise the rest of the power curve the flatter the curve will be, which in my opinion is where I want my car to be, I want to be able to pull hard no matter where the engine is in the RPM range....just my 2 cents

Digitalwave · 02-23-2004, 01:18 PM

Chips do have good gains and are definately worth the money, but people just think that they can get a chip, intake, and exhaust and have 200hp. It doesn't work like that.

chromius · 02-23-2004, 01:26 PM

Quote:

Originally posted by Digitalwave
Chips do have good gains and are definately worth the money, but people just think that they can get a chip, intake, and exhaust and have 200hp. It doesn't work like that.

You are right, normally it dosen't work like that, but as far as eta's go, its pretty close, on the torque line anyway. and HP gets a nice boost also. When it really comes down to it though the only way to tell is by a dyno before and after, everyone's car is different.

Skunk#1 · 02-23-2004, 02:47 PM

objec, why bother. man all you have to do is pick up a book. dont weld the diff unless you have an all out race car that stays on the track. because the way it sounds is that you dont know anything and by that i mean i dont think you know anything about cars or driving, so i would hate to hear that you went and welded your diff and lost control of your car (the m3 w/800hp) and wrecked it.

but then again you could always reimagine it later.

BMW BMXer · 02-23-2004, 03:25 PM

Quote:

Originally posted by Digitalwave
Chips do have good gains and are definately worth the money, but people just think that they can get a chip, intake, and exhaust and have 200hp. It doesn't work like that.

Eurostyle never said hp. He said tourque.