228=135i

[Ginger_Extract]

Originally Posted by ShocknAwe

Have you done any weight reduction though?

Mildly. Nothing out of the ordinary for an enthusiast driven 135i. 17" wheels w/ 255's, removed the cowling in the engine bay, N55 MP + BERK Race. The TC Kline coils are of roughly the same heft as the OE springs and dampers, and the Eibach sway bar is certainly much heavier than the OE bar,so that's a wash. The Driver could stand to do some weight reduction as well.

By my own maths, if my car was a full fat, stock 135i on a full tank of fuel, it would still be a few pounds lighter than a 228i.

[ShocknAwe]

Originally Posted by Ginger_Extract

Mildly. Nothing out of the ordinary for an enthusiast driven 135i. 17" wheels w/ 255's, removed the cowling in the engine bay, N55 MP + BERK Race. The TC Kline coils are of roughly the same heft as the OE springs and dampers, and the Eibach sway bar is certainly much heavier than the OE bar,so that's a wash. The Driver could stand to do some weight reduction as well.

By my own maths, if my car was a full fat, stock 135i on a full tank of fuel, it would still be a few pounds lighter than a 228i.

Probably good for 60-100lbs of reduction overall then sounds like (20-40lbs for wheels, 10lbs cowling, 30-50lbs exhaust). Not much. Thanks for the answer homie.

[DSSG]

I'll stick by my statements. Not everyone wants to be a boy racer mostly they want a reliable ride that'll get them to work.

The 128i is a good choice with a reliable straight 6 sans turbo. Another factor is a straight 6 engine will have a turbine smoothness that no 4-banger will ever achieve.

Notice also that the six is being used in the M cars while the 4-banger with turbo is the vast majority of BMWs with the exception of 6 & 7 series which use the six or eight.

[128Convertibleguy]

Originally Posted by Wakka

""The most powerful BMW racing engine ever manufactured is a 4 cylinder, turbo charged 1,500 cc engine . . ."

Was the Mclaren F1's engine not considered a 'racing' engine? S70/2 is the best engine I can think of from bmw...

The statement quoted from that other thread, is fact. The early 80s BMW F1 engine, 1.5L turbo four, made something over 1200 HP. The S70/2 made about half as much.

Those 80s F1 engines, with turbochargers that were unlimited, were bizarre. It was almost as if the turbos were pushing the pistons around, rather than vice versa. In some ways they resembled jet turbine engines.

[BrokenVert]

Originally Posted by 128Convertibleguy

The statement quoted from that other thread, is fact. The early 80s BMW F1 engine, 1.5L turbo four, made something over 1200 HP. The S70/2 made about half as much.

Those 80s F1 engines, with turbochargers that were unlimited, were bizarre. It was almost as if the turbos were pushing the pistons around, rather than vice versa. In some ways they resembled jet turbine engines.

There should also be two things pointed out about that number.

1) that's an estimated number. The turbo cars of that era were not dynoed.

2) that's a number for the engine in qualifying trim. It only lasted a few laps at that power level.

[128Convertibleguy]

Originally Posted by BrokenVert

There should also be two things pointed out about that number.

1) that's an estimated number. The turbo cars of that era were not dynoed.

2) that's a number for the engine in qualifying trim. It only lasted a few laps at that power level.

Agreed. But they were widely reported to have 1000HP in race trim (a number which could have been pretty accurately done, simply by performance), and I've seen 1400HP in qualifying trim estimated. My 1200HP was an attempt to be somewhat conservative.

I would guess the qualifying motors were replaced as junk, after the few laps.

But, in any event, they clearly hold the title for most powerful F1 engines ever. And the BMW the most powerful BMW engine ever.

[BrokenVert]

Originally Posted by 128Convertibleguy

Agreed. But they were widely reported to have 1000HP in race trim (a number which could have been pretty accurately done, simply by performance), and I've seen 1400HP in qualifying trim estimated. My 1200HP was an attempt to be somewhat conservative.

I would guess the qualifying motors were replaced as junk, after the few laps.

But, in any event, they clearly hold the title for most powerful F! engines ever. And the BMW the most powerful BMW engine ever.

Fair play. I'm not trying to dimish the utter ridiculousness of those cars. Just saying that anything over 1000hp is usually a qualifying estimate. And yes, the engines were either rebuilt or completely thrown away after a few qualifying laps.

[aloksatoor]

Even todays F1 PUs should be capable of that with unrestricted fuel flow (its 100kg an hour now with a max fuel cap of 100kg in 2 hours).

Back to the thread though, doesn't change the fact that a NA engine will outlast the Forced induction one. I drove that 4 banger in the 228 in a loaner (328) and it runs out of steam pretty fast on the freeway the auto box is always busy trying to keep it in check.

[ShocknAwe]

Originally Posted by aloksatoor

I drove that 4 banger in the 228 in a loaner (328) and it runs out of steam pretty fast on the freeway the auto box is always busy trying to keep it in check.

Slushbox performance is all about the TCU programming. Not trying to counter your statement at all, but just looking at what the Alpina TCU flash has done for those AT owners here is proof of that enough. Having driven a few of the new 4-bangers I agree they are quite lazy and wheezy in stock form but can see how they have the potential to be quite angry if tuned properly.

[roo97ss]

I had come across this a while back. Pretty impressive for the turbo 4, and you can see why they area more powerful than the 3.0 inline 6 n/a cars.

http://www.edmunds.com/car-reviews/t...no-tested.html

vs this at same dyno, different days obviously.

http://www.edmunds.com/car-videos/dy...est-video.html

240/257 on 328i (n20)
285/291 on 135 (N54)