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      10-30-2019, 08:21 PM   #23
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Quote:
Originally Posted by janea1207 View Post
On wich setup you made 11.8 1/4 mile? MHD OTS stage 1,2 or custom tune? downpipe? x drive? 340i?
11.8@118MPH DervTech tune (not recommended, too much boost and fuel = bad ignition timing)

11.5@121MPH MHD OTS Stage 2 95/102 flash but using E30 fuel and my car is an M140i rear wheel drive, Hoosier drag radials, stock exhaust.
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      10-31-2019, 09:52 PM   #24
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Quote:
Originally Posted by OzBMR View Post
Quote:
Originally Posted by janea1207 View Post
On wich setup you made 11.8 1/4 mile? MHD OTS stage 1,2 or custom tune? downpipe? x drive? 340i?
11.8@118MPH DervTech tune (not recommended, too much boost and fuel = bad ignition timing)

11.5@121MPH MHD OTS Stage 2 95/102 flash but using E30 fuel and my car is an M140i rear wheel drive, Hoosier drag radials, stock exhaust.
i am thinking what soft to put in my 340i rwd. MHD stage2 OTS thing is slow, but custom tune could be dangerous (like you wrote "too much boost and fuel). I have no acces to E30, E50, just Ron 98.
What you advice for making my 340i fast? jb4? bm3? mhd?(custom tune or ots map)
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      11-01-2019, 12:26 AM   #25
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Quote:
Originally Posted by janea1207 View Post
i am thinking what soft to put in my 340i rwd. MHD stage2 OTS thing is slow, but custom tune could be dangerous (like you wrote "too much boost and fuel). I have no acces to E30, E50, just Ron 98.
What you advice for making my 340i fast? jb4? bm3? mhd?(custom tune or ots map)
Where are you in France? If you have access to E85 you can blend yourself if you choose. I use 4 x 20L fuel containers and fill each with 13 litres of RON98 then add 7 litres of E85 to each for an E30 blend.

When you purchase the Stage 1 or Stage 2 maps pack from MHD you get a range of tunes for various octane levels including 93 (RON98)

If you want to keep your factory exhaust but more performance I would recommend the MHD Stage 2 pack. It has worked well in my car, is smooth and very fast.

You should also consider getting xHP software to make the gearbox the way it should have been from the factory.
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      11-01-2019, 05:39 AM   #26
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Quote:
Originally Posted by OzBMR View Post
Quote:
Originally Posted by janea1207 View Post
i am thinking what soft to put in my 340i rwd. MHD stage2 OTS thing is slow, but custom tune could be dangerous (like you wrote "too much boost and fuel). I have no acces to E30, E50, just Ron 98.
What you advice for making my 340i fast? jb4? bm3? mhd?(custom tune or ots map)
Where are you in France? If you have access to E85 you can blend yourself if you choose. I use 4 x 20L fuel containers and fill each with 13 litres of RON98 then add 7 litres of E85 to each for an E30 blend.

When you purchase the Stage 1 or Stage 2 maps pack from MHD you get a range of tunes for various octane levels including 93 (RON98)

If you want to keep your factory exhaust but more performance I would recommend the MHD Stage 2 pack. It has worked well in my car, is smooth and very fast.

You should also consider getting xHP software to make the gearbox the way it should have been from the factory.
Exhaust just - downpipe install. Xhp stage3 also will do. No access to anothers fuel just Ron 98
The main question is what soft to choose? OTS stage2 map is not fast how i want but custome tune is dangerous?
I want 100-200 less than 9 sec and 1/4 mile less than 12
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      11-01-2019, 07:59 AM   #27
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Quote:
Originally Posted by janea1207 View Post
Exhaust just - downpipe install. Xhp stage3 also will do. No access to anothers fuel just Ron 98
The main question is what soft to choose? OTS stage2 map is not fast how i want but custome tune is dangerous?
I want 100-200 less than 9 sec and 1/4 mile less than 12
I think with only 93 octane fuel it will be difficult to achieve what you want.

Meth injection would help if you want to go down that track, but still probably not going to result in 11 sec 1/4 without very quick 60ft times.

340i is a lot heavier than M140i.
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      11-01-2019, 02:16 PM   #28
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Quote:
Originally Posted by OzBMR View Post
I think with only 93 octane fuel it will be difficult to achieve what you want.

Meth injection would help if you want to go down that track, but still probably not going to result in 11 sec 1/4 without very quick 60ft times.

340i is a lot heavier than M140i.
You think? I went 12.0 with 96 octane and the X3 weighs 400 lbs more then a 340i, approx. .4 in the 1/4 mile.

I think a good tune with a catted downpipe and right tires will be 11's ALL DAY in a 340i.
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      11-01-2019, 08:51 PM   #29
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I think it’s very doable with good traction. I’m only around 75 lbs less than a 340i and went 11.8 on e30 Stage 2. I’m sure with drag radials I could go 11.60’s, as is. Add 75 lbs and swap the e30 for 93 and upper 11’s are still probable.
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      11-01-2019, 09:52 PM   #30
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Originally Posted by GT500R View Post
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Originally Posted by OzBMR View Post
I think with only 93 octane fuel it will be difficult to achieve what you want.

Meth injection would help if you want to go down that track, but still probably not going to result in 11 sec 1/4 without very quick 60ft times.

340i is a lot heavier than M140i.
You think? I went 12.0 with 96 octane and the X3 weighs 400 lbs more then a 340i, approx. .4 in the 1/4 mile.

I think a good tune with a catted downpipe and right tires will be 11's ALL DAY in a 340i.
You are on wich soft? MHD or BM3? OTS stage2?
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      11-02-2019, 08:22 AM   #31
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Quote:
Originally Posted by GT500R View Post
You think? I went 12.0 with 96 octane and the X3 weighs 400 lbs more then a 340i, approx. .4 in the 1/4 mile.

I think a good tune with a catted downpipe and right tires will be 11's ALL DAY in a 340i.
This calculator gives pretty indicative quarter mile results based on wheel HP and weight https://robrobinette.com/et.htm

Keep in mind he is saying he only has access to 93 octane fuel and he is rear wheel drive. You were using 96 octane fuel, X drive with 1.75 sec 60 ft launches and -146 DA for your 12.02@113.98MPH

Assuming 3695 lbs for 340i, with 93 octane only he'll be boost or timing limited due to lack of octane, make about 390 wheel HP and run about 12.3@116MPH assuming a 1.87 sec 60 ft, which he isn't going to do with anything other than drag radials, Toyo R888 soft etc and a well prepped track. Cut the 60 ft down to 1.7 and it'd still be 12.0. He'll need more power than a good tune and downpipe with 93 octane fuel can generate (stock turbo)

For your car using the calculator gives 12.4@115MPH assuming 4095 lbs and 420 wheel HP. Your MPH indicates about that level of power and the X drive launch with 1.75 sixty foot gives you an extra 0.2 - 0.3 benefit over the quarter (0.1 in 60ft = 0.2 in the quarter), so really should be about 12.1@115 MPH, pretty close to what you're getting.

Quote:
Originally Posted by B58togo View Post
I think itís very doable with good traction. Iím only around 75 lbs less than a 340i and went 11.8 on e30 Stage 2. Iím sure with drag radials I could go 11.60ís, as is. Add 75 lbs and swap the e30 for 93 and upper 11ís are still probable.
For an M240i weighing 3519 lbs and making 420 wheel HP the calculator spits out 11.8@121 MPH with a 1.80 sec 60 ft

For my car at 3295 lbs and 420 wheel HP the calculator indicates 11.5@123 MPH.
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      11-02-2019, 09:20 AM   #32
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The 340i is not so much heavier than the M140i, only 70 kgs - 154 pounds.

M140i weighs 1545 kgs (3406 pounds), 340i 1615 kgs (3560 pounds).

Quote:
Originally Posted by OzBMR View Post
I think with only 93 octane fuel it will be difficult to achieve what you want.

Meth injection would help if you want to go down that track, but still probably not going to result in 11 sec 1/4 without very quick 60ft times.

340i is a lot heavier than M140i.
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      11-02-2019, 09:24 AM   #33
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Those calculators are a very rough guideline. They don't even take into account what transmission you have. A DSG or DCT or even the ZF8 makes a huge difference over a manual or basic slushbox. Also, you didn't add driver weight. I put in 420 whp and then added 175 lbs for my weight to the 3519 and it "assumed" a 12.02 @ 119, along with a 1.82 sixty. Also, the 8.13 1/8 mile was on the slow side, which makes little sense, with the overly optimistic sixty (My best is 1.91 on 265 MPS4S)
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      11-02-2019, 09:43 AM   #34
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BMW claimed weights includes 75 kgs driver and 90% of fuel, also there's no DSG or DCT for both M140i and 340i.

Only Manual and 8AT and the difference between them only 10 kgs.

Quote:
Originally Posted by B58togo View Post
Those calculators are a very rough guideline. They don't even take into account what transmission you have. A DSG or DCT or even the ZF8 makes a huge difference over a manual or basic slushbox. Also, you didn't add driver weight. I put in 420 whp and then added 175 lbs for my weight to the 3519 and it "assumed" a 12.02 @ 119, along with a 1.82 sixty. Also, the 8.13 1/8 mile was on the slow side, which makes little sense, with the overly optimistic sixty (My best is 1.91 on 265 MPS4S)
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      11-03-2019, 04:42 AM   #35
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Quote:
Originally Posted by IMS-340MP View Post
The 340i is not so much heavier than the M140i, only 70 kgs - 154 pounds.

M140i weighs 1545 kgs (3406 pounds), 340i 1615 kgs (3560 pounds).
I put my car on scales and it weighed 1495 kg (3295 lbs with minimal fuel, no driver) as driven at the track.

340i rear wheel drive has a listed kerb weight range of 1615 (3560 lbs) to 1735 kg (3825 lbs) depending on options.

Even using the lower end of the range at 3650 lbs with a boost and timing limited 93 octane tune you'd expect a best of around 12.1@117MPH.

If janea1207 had access to E85 and could blend up E30 then yes 11's are possible with a good E30 Stage 2 tune and a good rear wheel drive launch.

Quote:
Originally Posted by B58togo View Post
Those calculators are a very rough guideline. They don't even take into account what transmission you have. A DSG or DCT or even the ZF8 makes a huge difference over a manual or basic slushbox. Also, you didn't add driver weight. I put in 420 whp and then added 175 lbs for my weight to the 3519 and it "assumed" a 12.02 @ 119, along with a 1.82 sixty. Also, the 8.13 1/8 mile was on the slow side, which makes little sense, with the overly optimistic sixty (My best is 1.91 on 265 MPS4S)
Agree, calculators like that are a rough guide. That's a great 60ft for MPS4S.
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      11-04-2019, 06:49 PM   #36
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Quote:
Originally Posted by janea1207 View Post
Quote:
Originally Posted by GT500R View Post
Quote:
Originally Posted by OzBMR View Post
I think with only 93 octane fuel it will be difficult to achieve what you want.

Meth injection would help if you want to go down that track, but still probably not going to result in 11 sec 1/4 without very quick 60ft times.

340i is a lot heavier than M140i.
You think? I went 12.0 with 96 octane and the X3 weighs 400 lbs more then a 340i, approx. .4 in the 1/4 mile.

I think a good tune with a catted downpipe and right tires will be 11's ALL DAY in a 340i.
You are on wich soft? MHD or BM3? OTS stage2?
I agree I went 11.7 flat at 119 at atco on Friday on stock continentals with no bolt ons just bm3 ots e30 and car weighed 3940 with me in it then going home I did 11.66 on dragy at 119 had less gas cuz or track passes but positive slope still a good run
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      11-05-2019, 04:09 AM   #37
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Quote:
Originally Posted by elg0rd0yadigg View Post
I agree I went 11.7 flat at 119 at atco on Friday on stock continentals with no bolt ons just bm3 ots e30 and car weighed 3940 with me in it then going home I did 11.66 on dragy at 119 had less gas cuz or track passes but positive slope still a good run
Also agree, with E30 fuel and 1.7 second 60ft times (i.e. Xdrive or drag radials), not on a straight 93 tune with RWD and stock tires

Good passes by the way, I like that you went stage 2 tune with the car otherwise completely stock.
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      11-05-2019, 10:08 AM   #38
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Quote:
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Quote:
Originally Posted by elg0rd0yadigg View Post
I agree I went 11.7 flat at 119 at atco on Friday on stock continentals with no bolt ons just bm3 ots e30 and car weighed 3940 with me in it then going home I did 11.66 on dragy at 119 had less gas cuz or track passes but positive slope still a good run
Also agree, with E30 fuel and 1.7 second 60ft times (i.e. Xdrive or drag radials), not on a straight 93 tune with RWD and stock tires

Good passes by the way, I like that you went stage 2 tune with the car otherwise completely stock.
Thanks LOL got car three weeks ago so kind of wanted to get some numbers before seasons over here in NY
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      11-16-2019, 07:44 AM   #39
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Went back to the track to see if there was any improvement with the Ver3 MHD 95/102 OTS tune and E30 fuel. Last time 11.51@121.94MPH with Ver2, same fuel.

I also wanted to test allowing the car to shift at it's own shift points, last time I was experimenting with short shifting.

I live in a sub-tropical city and today was pretty hot reaching 102 F (39 C) where Willowbank Raceway is.

There was no traction compound sprayed and a lot of loose rubber, poor prep made for difficult launches. DA was also terrible 2900ft and still 90 F (32 C) for my first run vs a Tesla Model 3 Performance. I ran 11.72@121.37MPH (1.944 sec 60 ft was bad) and he ran 11.80@111.45MPH

Best run I had was 11.53@120.51MPH with a 1.769 sec 60 ft. Next best was 11.54@121.33MPH with a 1.793 sec 60ft. I'll have to check through the data to see if the fastest runs were with auto shifting as I did some auto and some manual shifting.

With cooler conditions and better track prep I know the car is capable of 11.3's, perhaps 11.2's as is.

We're heading into our Summer now, so I won't be back to the track now until it cools down again April/May 2020. Who knows, might have an XDI HPFP, full E85 tune and an LSD by then??
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