[smellthebeans]

Originally Posted by sc3200

doesn't a stock 328i run a 5.7 0-60?

Road and Track posted a 6 second run with a stock manual.
http://www.roadandtrack.com/go/news/...i-65-1-roa0813

[ocN55]

Originally Posted by smellthebeans

Road and Track posted a 6 second run with a stock manual.
http://www.roadandtrack.com/go/news/...i-65-1-roa0813

http://en.wikipedia.org/wiki/BMW_3_Series_(E90)

says 5.7 for us spec
but then again its wikipedia

[smellthebeans]

Could be the difference of tuning a N51 vs. N52 with 3 stage conversion? I have the latter and I can affirm the increase in available torque and horse power.

[KingofKingz]

I got a 5.7 with my N53 tuned by Shiv running 102 ROZ.

[JDane07]

I did the same thing to compare our two cars:

Pretty dang similar honestly. It's a little harder to see my speedometer, but we're around the same time I believe.

[MonsterM]

Originally Posted by iceman09

Maybe in europe.

5.9 0-60 US spec 328i manual.

http://www.caranddriver.com/comparis...omparison-test

6.8 for auto wagon (about 200 lbs more than the sedan).

http://www.caranddriver.com/reviews/...trumented-test

[ocN55]

Originally Posted by smellthebeans

Could be the difference of tuning a N51 vs. N52 with 3 stage conversion? I have the latter and I can affirm the increase in available torque and horse power.

lol no you can't

n51 and n52 is the same in terms of power, should be no difference there.

As far as I know, n51 just has a slightly lower compression ratio and comes with a 3stage IM. Neither of which yeild higher or lower numbers on a dyno or butt dyno

[SDemetris]

Originally Posted by sc3200

lol no you can't

n51 and n52 is the same in terms of power, should be no difference there.

As far as I know, n51 just has a slightly lower compression ratio and comes with a 3stage IM. Neither of which yeild higher or lower numbers on a dyno or butt dyno

Not quite. In theory and empiracle dyno data has proved both to bring more power. A higher compression ratio means the engine can run more efficiently and therefore get more power out of the same amount of combusted petrol. Also the 3 stage intake manifold creates high pressure regions near intake valves which increase the volumetric efficiency of the engine which also makes more power. And everyone who has put one on a car that didn't come with bit and did dyno testing found that they gained power

[ocN55]

Originally Posted by SDemetris

Not quite. In theory and empiracle dyno data has proved both to bring more power. A higher compression ratio means the engine can run more efficiently and therefore get more power out of the same amount of combusted petrol. Also the 3 stage intake manifold creates high pressure regions near intake valves which increase the volumetric efficiency of the engine which also makes more power. And everyone who has put one on a car that didn't come with bit and did dyno testing found that they gained power

You're not comparing stock v stock though. Are you saying that n52 with added 3 stage IM yields higher gains than n51? I agree with that but my point is that the the stock n52 does not make more power than the n51, and vice versa. The engine wasn't designed to be less powerful than the n52 in the first place, just made for emission regulations.

[SDemetris]

Originally Posted by sc3200

You're not comparing stock v stock though. Are you saying that n52 with added 3 stage IM yields higher gains than n51? I agree with that but my point is that the the stock n52 does not make more power than the n51, and vice versa. The engine wasn't designed to be less powerful than the n52 in the first place, just made for emission regulations.

Yes I think so? I am not sure what you mean by "yield higher gains". If they start with the same power, and the N52 is given a 3-Stage IM it will have more than the stock 230. If you add a 3-Stage intake manifold to an N51, nothing will happen because it has one stock. Yes in stock form the N51 has one thing that reduces power, but another that increases it. If an N52 (with its higher compression ratio) gets the better intake manifold it will make more power. I would expect the same thing would happen if you put N52 pistons in an N51, but I doubt anyone would see that as a worthwhile mod

[smellthebeans]

Or in other words. The N51 is not as tunable as the N52 with bolt on mods.

[Taskmaster]

The head is different, so you would have to change that too. I would focus on head work, headers and a good tune.

[ocN55]

Originally Posted by SDemetris

Yes I think so? I am not sure what you mean by "yield higher gains". If they start with the same power, and the N52 is given a 3-Stage IM it will have more than the stock 230. If you add a 3-Stage intake manifold to an N51, nothing will happen because it has one stock. Yes in stock form the N51 has one thing that reduces power, but another that increases it. If an N52 (with its higher compression ratio) gets the better intake manifold it will make more power. I would expect the same thing would happen if you put N52 pistons in an N51, but I doubt anyone would see that as a worthwhile mod

We're in agreement when you say that a 3stage IM n52 makes more power than stock n51. Where I think you messed up was by implying that the n52 was better for this reason which I thought was an unfair comparison because you were not comparing stock to stock. But my bad if I took the implication the wrong way.

[nycbr]

Also consider that the speedometers are 3-4 mph over; so really need to do a "0-64" run if using the speedo only

[Taskmaster]

Originally Posted by nycbr

Also consider that the speedometers are 3-4 mph over; so really need to do a "0-64" run if using the speedo only

Depends on the speed your at, it likely a percentage of overcorrection instead of a set value.

[cuiter23]

I'm not sure how someone here got 0-60 in 7.3s with a stock 328i. Official times for the US 328i 0-60 is 6.0s and 0-100 under 6.5s.

[Kevin52]

My stock x drive (aside from pe) does 0-60 in about 7.1 seconds, I have an auto too.

[SflBimmer8484]

Fastest I ever got out of my 6mt e92 was 5.9

[bimmerquick43321]

I think it's safe to say

- stock manual ~6sec
- stock auto ~6.5
- stock auto + xdrive ~7 sec
- I would like to see how a manual xdrive that's started correctly can do, I would see it being at least as fast as the non x drive manual until 60mph and than slower

[ZhengHai]

H

[2M]

I have gotten consistent 5.8's with an auto E92. Powerbox + Injen intake. When i think of it, empty trunk and gas tank about 1/4.