Xcede 135i 12.5 with only chip & DP's!

[Obviously]

Well done Vinay, Sherwin & Xcede. Very impressive. :thumbsup:

 

[Sherwin@xcede]

Hi there, just to add some information to complete the picture. The car ran on semi's. Apparently quite worn with no traction, but semi's nevertheless. Not drag tyres, just semi's. So please note this time is with intermediate circuit racing semi's.

 

[Twinz]

The good times are rolling:thumbsup:

That is an incredible time for the mods on the car. Well done Sherwin. 11s are on the cards for that 135.:thumbsup:

 

[applehero]

Ok I may have been a bit over-zealous when I said no effect. There may well be some. But thus far it has proven to be negligible. Standard cars are failing sooner than modded ones, what with all the recalls about.

Certain mods actually result in LESS stress to the components. Downpipes for instance. The exhaust gasses exit the turbo, immediately hit a 90 deg bend down & BAM, the catts are right there. 30cm from the turbo exit. Ther turbo's have to force the air through this restriction. When you remove the catts the turbos spin much free-er with the lower backpressure. So its good for the turbo's. Less timing pull & lower EGT's so it's good for the engine.

Similarly, intakes can also help lower the duty cycle on the wastegates for a given boost. A better cooler has a lower pressure drop across it's core. So yeah, boosting a bit higher might mean a bit more in-cylinder pressure, but it can be offset by hardware.

I don't think chip tuning - as in after market tuners - has been around long enough to make a definite life prediction on the newer cars. Particularly the turbo'd high performance cars - 335 and the like.

I understand what you're saying about downpipes and decatting for example. This is provided boost isn't increased, otherwise you're back to where you started in terms of stress in components.

I'm not sure how the intake affects the wastegates... The point that wastegates come into operation is at a given pressure. Not so? :thinking:

What we haven't touched on are crankshafts, gearboxes, clutches, prop shafts and differentials. With an increase in torque, life will decrease on all these components. (Again, relative to the fatigue life of the stock standard car)

 

[Matt Q]

Congrats on the awesome time..!

Excuse the ignorance....but what effect does extra power like that have to the Life of the engine and wear and tear ?

Thought the same thing to myself actually.

A well tuned engine will make more power and last LONGER than a poorly tuned engine... also these very small increased in PEAK power (typically less than 20% up) are hardly even noticed by BMW internals as they are so strong..

also bare in mind that PEAK power is just that.. it's the peak .. it's not the place the engine spends 90% of it's time which is where the real aging occurs

 

[Sherwin@xcede]

I'm not sure how the intake affects the wastegates... The point that wastegates come into operation is at a given pressure. Not so? :thinking:

There's a given wastegate solenoid duty cycle required to achieve a certain boost level. Let's say 0.9 bar at 5000rpm requires the duty cycle to be 60%.

If you fit a free-flowing intake, like a dual cone system we have found we achieve the same boost with about 5% less duty cycle. I'm sure George can confirm this.

This is because the turbos can suck from an larger pipe with an open cone instead of a closed, restrictive airbox. So the turbos can suck enough air to compress to 1 bar much easier with an open intake. Once again, I think this helps to lengthen the lifespan of the turbo's.

What we haven't touched on are crankshafts, gearboxes, clutches, prop shafts and differentials. With an increase in torque, life will decrease on all these components. (Again, relative to the fatigue life of the stock standard car)

Yeah more torque will definitely have an impact on those. I think in the N54 all those components are heavily over-engineered as I have never heard of any failures. But yeah, I'm sure they will have a shorter lifespan than a stock car.

You have to pay to play.

 

[Matt Q]

You have to pay to play.

I like this man... a no-bullshit tuner is such a breath of fresh air

 

[applehero]

There's a given wastegate solenoid duty cycle required to achieve a certain boost level. Let's say 0.9 bar at 5000rpm requires the duty cycle to be 60%.

If you fit a free-flowing intake, like a dual cone system we have found we achieve the same boost with about 5% less duty cycle. I'm sure George can confirm this.

This is because the turbos can suck from an larger pipe with an open cone instead of a closed, restrictive airbox. So the turbos can suck enough air to compress to 1 bar much easier with an open intake. Once again, I think this helps to lengthen the lifespan of the turbo's.

By saying 60 % duty cycle, do you mean that 60% of the time the waste gate is closed?

Yeah more torque will definitely have an impact on those. I think in the N54 all those components are heavily over-engineered as I have never heard of any failures. But yeah, I'm sure they will have a shorter lifespan than a stock car.

You have to pay to play.

Agree with what you're saying though - you want more performance, it's going to cost you...

Sorry for the thread Hijack BTW...

 

[babyboss]

xcellent times & 1 of the fastest 135's in SA :clap:

ps : wana race me - im gona whip yre ass :hammerhead:

 

[George Smooth]

6B 27 V SINGH 12.525 183
6B 27 V SINGH 12.567 183
6B 27 V SINGH 12.619 181
6B 27 V SINGH 12.671 181
6B 27 V SINGH 12.772 183
6B 27 V SINGH 12.834 181
6B 27 V SINGH 12.937 179
6B 27 V SINGH 0.53 13.492 12.962 182 23.306 233
6B 27 V SINGH 13.024 179
6B 27 V SINGH 0.747 13.784 13.037 180 23.461 230
6B 27 V SINGH 0.627 13.69 13.063 181 23.424 232
6B 27 V SINGH 0.929 14.288 13.359 177 23.95 228
6B 27 V SINGH 1.22 16.254 15.034 182 25.327 234

Damn Vinay did a lot of runs. Was the track quiet?
So best run on official figures 12.525@183. Well done. Its a pity ODI does not have a important stat of 60ft which gives everyone a great idea of how they can improve their times traction wise.

Well done to Thamen as well with his Supercharged V8. 8B 17 T MAHABEEK 1.484 14.354 12.87 197 22.305 256. If he gets a run with his normal 11.7 quarter his km time reading will be equivalent to the Savspeed record car. A lot of people say that you got to do two runs in both directions but remember that ODI is a aeroplane runway and you always race into a headwind (by runway design) which means the coming back route is always faster.

 

[vinay]

Hey George thanks man, track was not that busy but it was pretty hot over there.
Dam just 0.25 for a 12.4 maybe next time! Well done to Thamen as well and thanks for the ice packs as well man.

 

[George Smooth]

Hey George thanks man, track was not that busy but it was pretty hot over there.
Dam just 0.25 for a 12.4 maybe next time! Well done to Thamen as well and thanks for the ice packs as well man.

It sux when you get close to the lower time. I needed .009sec for a 12.2 hehe If I had a thick number plate holder I would have gotten it :excited:

 

[Nelson]

Well done Vinay! A super impressive time with such little mods. What sort of wkw are are you pulling out?

 

[Kinnear]

I loved too see the battle between BabyBoss 135I vs Sherwins 135i but both cars headsup agianst one another one night... Maybe Tarlton......

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How is it possible by doing only chip and exhaust doing a 12.5 sherwin if this guy does
2008 E90 335i AT - Chiplogic Flash, Helix Cooler, AR Downpipes, Forge DV's, aFe Intake, Lebonte Meth kit, M3 Diff
12.3@187 SA Record Holder 251km/h-1km with all of the above!!!
I understand its a 135i vs 335i but the weight on the cars is not that big diffrence both running with the n54??????

 

[Avi 333]

opcorn::dunno:

 

[George Smooth]

opcorn::dunno:

No action. You got to go to the track to run the times :wave:

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I loved too see the battle between BabyBoss 135I vs Sherwins 135i but both cars headsup agianst one another one night... Maybe Tarlton......

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How is it possible by doing only chip and exhaust doing a 12.5 sherwin if this guy does
2008 E90 335i AT - Chiplogic Flash, Helix Cooler, AR Downpipes, Forge DV's, aFe Intake, Lebonte Meth kit, M3 Diff
12.3@187 SA Record Holder 251km/h-1km with all of the above!!!
I understand its a 135i vs 335i but the weight on the cars is not that big diffrence both running with the n54??????

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It is possible. My current is 12.308@189. To get a extra 6km/h on the exit you need much more power. To get to my kilometer speed of 251 vs their 234 you need much much much more power. Up to 12.5 its pretty easy then things start becoming harder and harder traction wise and more power is needed per .1sec increment. The problem with the turbo cars is you start playing with huge amounts of torque that you cannot put down in the first two gears so you only start realizing the big gains at higher speeds.

 

[Avi 333]

Makes a lot of sence to me .I wish we had a track in dbn,
@George ,what power do I need to make to do low 12's?

 

[George Smooth]

Makes a lot of sence to me .I wish we had a track in dbn,
@George ,what power do I need to make to do low 12's?

Times are traction related mostly. A good example is the 11.5 second cars in the States. They pull a 1.5 second 60ft where we pull 1.9-2.0 so they are already .5sec quicker on the first 20meters so you get the picture. From the exit speeds I have seen on the fast 135 that did 12.5@183 down there I reckon you can run a low twelve with around 390whp although I do not know if that car had a interior or what. Thats just a thumb suck because what the curve looks like matters more.

 

[Coisman]

imp:
How do you think does all this extra performance influance the durability of the engine??

 

[Kinnear]

I see your point getting down .2 needs lots more power coz you can't slap the pedal down as hard on the 20ft times but what i am trying to say is i don't think a 12.5 with just software is possible on a 135i or does bigger intercoolers fuel pumps and inductions fall under "Just Chip and Exehaust":thinking: