[Aspen235]

Thought I would post my 1/4 time. Pretty reasonable for a stock heavy brick. even has run flat and the mega heavy 19" wheels.
Fail at pic upload, ran 14.1sec

[Riick]

Only .5 sec faster than my 28i in the dead of Florida summer (temps in the 90s f). What was your 60ft and mph?

I want to run again this winter when it cools down in the 50s (f) to see if I can kiss 13s with a good 60ft.

[TheCoolX3]

Awesome! I am gonna be taking my modified one soon. Tried once already then FL weather kicked in and a monsoon started and my track day was canceled.

Originally Posted by Aspen235

Thought I would post my 1/4 time. Pretty reasonable for a stock heavy brick. even has run flat and the mega heavy 19" wheels.
Fail at pic upload, ran 14.1sec

[Aspen235]

Fairly cool day, about 15C

Stock X3:
stock tires and wheels
No DME mods
stock air filer element
stock everything except a Curt trailer hitch

Shell 91 octane

[Riick]

I'll bring my 28i back to the track soon when it cools down. I'm positive I can pull out a low 14 and at least 95mph from it. Everyone stands on a milk crate shouting how slow the 28i is compared to the 35i when in reality they're both mid 14 second cars.

[Aspen235]

Rick, your car runs 14.6 with a tune and lighter wheels, 15 stock. Mine runs 14.1 stock. Neither are mid 14. Math....

[Riick]

Factory M sport rims and non-run flats. Tires are not a mod they're general maintenance.

My only mod is a $200 Burger JB+. It's not a tune, it's a boost controller that raises it 3 psi. I ran 14.6 in the dead heat of humid Florida summer. Let me run again with your ambient air temps and humidity that you ran in Canada I'll also run a 14.1-14.2.

For $200 you can make a X3 28i as fast as a X3 35i. Sad.

[lawdude]

Originally Posted by Riick

Factory M sport rims and non-run flats. Tires are not a mod they're general maintenance.

My only mod is a $200 Burger JB+. It's not a tune, it's a boost controller that raises it 3 psi. I ran 14.6 in the dead heat of humid Florida summer. Let me run again with your ambient air temps and humidity that you ran in Canada I'll also run a 14.1-14.2.

For $200 you can make a X3 28i as fast as a X3 35i. Sad.

Throw in a density altitude of minus 1200 feet and maybe you could hit the 13s.

[Riick]

If I had a JB4 and catless downpipe? 13's no problems but it's my daily driver. A boost controller is enough.

[lawdude]

Originally Posted by Riick

If I had a JB4 and catless downpipe? 13's no problems but it's my daily driver. A boost controller is enough.

There's always something you can do to coax a better ET. BMW computer handles a few psi of boost without noticeable ill effects. Same could be done with the N55. However, those are the easy tenths of a second to get. But when you want to continue shaving off extra tenths, the cost increases by an order of magnitude. FWIW, the best pass I ever had in my E92 N54 was 12.5 at 115mph. Tune with no bolt ons. Density altitude was minus 1200 feet.

If you're racing on a consistent basis, horsepower/torque is like a drug - you always need more. The last car I raced was my daily driver too. Trapped 135 with ET in 10s when I stopped racing and quit spending money on it. Haven't raced for awhile, but it's still my daily driver. Fastest grocery getter in town. It was fun diversion. It was also very expensive.

And oh yeah, if you're a half second behind someone going through the trap, you've had a good look at his taillights.

[najnad]

better tires are good for a tenth of a second or two.
"Tune" covers a wide range of possible changes to a vehicle: remapping ECU, piggy-back modules that alter boost and/or other parameters, throttle response adapters, etc.

That being said, I have seen video of X3 28i with a piggy-back module that comes close to matching a stock X3 35i, but still loses. And when the X3 35i gets a similar piggy-back module it walks away from the 28i without a problem.

[oVeRdOsE.]

Originally Posted by Riick

Factory M sport rims and non-run flats. Tires are not a mod they're general maintenance.

My only mod is a $200 Burger JB+. It's not a tune, it's a boost controller that raises it 3 psi. I ran 14.6 in the dead heat of humid Florida summer. Let me run again with your ambient air temps and humidity that you ran in Canada I'll also run a 14.1-14.2.

For $200 you can make a X3 28i as fast as a X3 35i. Sad.

1 - On a highway roll, n55 will kill the n20.

2- I bring this info on an other forum, and members reported that they never saw a piggyback n20 doing below 15s.

your is specially fast. And yeah, kind of sad indeed
you have a base model, with 100 oct , 5L of fuel and removed all the interior ?

But man, its crazy fast 14 low for a suv. impressive.
Im wondering what I can do. actually on a JB stage1, and I have a JB4 laying around. Planning to do a comparison test.

[________]

[Riick]

Here in Florida it's starting to cool down, highs in the low 80s F now. If we can get a cold front to come through and it's highs in the 60s I'll go do another pass. I'm expecting at least a 14.3 at 95mph.

If this was a 328i and not an X3, I'd be running 13.8s.

[TheCoolX3]

Pass me what ever you're smoking brother! If i take that stuff my X3 ought to run a 10 right?

Originally Posted by Riick

Here in Florida it's starting to cool down, highs in the low 80s F now. If we can get a cold front to come through and it's highs in the 60s I'll go do another pass. I'm expecting at least a 14.3 at 95mph.

If this was a 328i and not an X3, I'd be running 13.8s.

[Riick]

The only drugs in this forum is the people that think the N20 is slow. I run faster than 99% of the F25's in this group and we still have the same people parketing every day how slow the N20 is compared to the N55 when I've proven that wrong.

It's getting old.

[lawdude]

Originally Posted by Riick

The only drugs in this forum is the people that think the N20 is slow. I run faster than 99% of the F25's in this group and we still have the same people parketing every day how slow the N20 is compared to the N55 when I've proven that wrong.

It's getting old.

I have no doubt you have a quick X3, but I'm not sure what you've proven wrong. If I understand you correctly, your over-boosted X3 N20 is still a half second slower than a stock X3 N55. With similarly skilled drivers, no matter the track or weather conditions, if you line up against a stock N55 you should still be a half second slower. In 1320 world, a half second is a big difference. And if the N55 also had his boost turned up, you'd be watching his taillights become ever smaller before you crossed the trap.

Doesn't really matter much anyway. Sounds like you enjoy your bimmer and that's what counts.

[Riick]

Run yours in the 1/4mi and let's compare

[x3sm]

Originally Posted by Riick

Factory M sport rims and non-run flats. Tires are not a mod they're general maintenance.

My only mod is a $200 Burger JB+. It's not a tune, it's a boost controller that raises it 3 psi. I ran 14.6 in the dead heat of humid Florida summer. Let me run again with your ambient air temps and humidity that you ran in Canada I'll also run a 14.1-14.2.

For $200 you can make a X3 28i as fast as a X3 35i. Sad.

You have no idea what you're saying if you think tires do not matter lol

You are comparing a modded N20 to stock N55, that is apples to oranges buddy. Biggest reason most people did not got for the N20 is because that engine is unreliable, aint no one want their timing chain to fail lol

You cant keep talking with no slip of showing you running STILL slower than stock N55

Also, I'll be in Jax in a few months with my X3, I'll personally remove my tune, loaded it up with all of my bags and drive down to beat your "tuned" N20 lol

[lawdude]

Originally Posted by Riick

Run yours in the 1/4mi and let's compare

I concede; yours is bigger. Now order a beer and put it on my tab.

[Riick]

My N20 isn't tuned. I'm running a boost controller with 3 psi more than stock. ECU and engine is stock.

There's millions of N20's on the road, it's BMW's most popular engine sold in virtually every model BMW offered. They're the most reliable engine BMW has ever produced.

In fact, on the 1st page of this forum, every single engine related issue is N55. There are no posts about engine related problems with an N20 in weeks but there's an N55 related engine issue post daily. But okay let's keep lying to ourselves.

[TheCoolX3]

Well tits! My car is bone stock by that means! I'm at about 400hp-450hp and on a stock ECU.

I know the whole timing chain thing is a touchy subject for you but on this forum alone theres at least 10 X3s that have had an N20 replaced from timing chain failure.

I may be wrong but, I have yet to see a post on here about an N55 with CEF.

Originally Posted by Riick

My N20 isn't tuned. I'm running a boost controller with 3 psi more than stock. ECU is stock.

There's millions of N20's on the road, it's BMW's most popular engine sold in virtually every model BMW offered. They're the most reliable engine BMW has ever produced.

The only posts about engine related issues in this forum are N55 related failures.