Why oh why,fuel consumption,mp9 vs aftermarket

rsarlie · Post by **rsarlie** » Mon Sep 10, 2007 1:11 pm

why does after market management eat soo much juice!trying on a full tank say 47l,only highway,only urban,it doesnt matter,drive slow,fast,400kms on a tank is always a miracle,yet mp9s running similar setup get decent fuel consumption according to driving style,Iv seen people drop there management for mp9 for fuel reasons,and mp9 seems to be at least 200-300kms better per tank on all cases,what is so different about the mp9?,I mean on the dikatator with all mp9 goodies,temp sender,tps,maf evrything a mp9 has is up and running on the diktator,why does mp9 give better fuel consumpyion?does it individualy controle injectors?or is it the tuner?why?

SHAUN · Post by **SHAUN** » Mon Sep 10, 2007 1:15 pm

rsarlie wrote:why does after market management eat soo much juice!trying on a full tank say 47l,only highway,only urban,it doesnt matter,drive slow,fast,400kms on a tank is always a miracle,yet mp9s running similar setup get decent fuel consumption according to driving style,Iv seen people drop there management for mp9 for fuel reasons,and mp9 seems to be at least 200-300kms better per tank on all cases,what is so different about the mp9?,I mean on the dikatator with all mp9 goodies,temp sender,tps,maf evrything a mp9 has is up and running on the diktator,why does mp9 give better fuel consumpyion?does it individualy controle injectors?or is it the tuner?why?

Well my car runs MP9 and i get 450km off a tank, so its really not that great.... and i drive 120km a day all highway, and under 120.

rsarlie · Post by **rsarlie** » Mon Sep 10, 2007 1:20 pm

450km and il be happy,on average with 50l i get 320/330 kms,to get 400 i have to basicaly hop around on idle under 60 or sit at 80 on the highway,just after a dyno it seems ok,on the next 2 tanks back to normal,heavy

DeeDubz · Post by **DeeDubz** » Mon Sep 10, 2007 1:27 pm

i'm running a 1.8i mp9.... i get about 600 on a tank....

Crawler · Post by **Crawler** » Mon Sep 10, 2007 1:30 pm

550 - 750 of mp9 - 1.4i is the norm

EX-DOHCTOR · Post by **EX-DOHCTOR** » Mon Sep 10, 2007 1:51 pm

I also get around 300KM's - 330KM's to a tank.

I am switching from full after market to MP9 as soon as I have the $$$ together.

I am also sick of the cold start issue every single f#cking morning on aftermarket management.

Gah! No thanks.

Looty · Post by **Looty** » Mon Sep 10, 2007 1:53 pm

Hi there,

I've got a Mk II 2.0L 16V with dicktator. I can drive down to Durbs on a tank if I drive at 160kph and under. In city driving I get between 11.5 and 12.5L/100Kms. This is bearing in mind that the valve stem seals are gone.

I think it depends on your driving style and map settings.

Solo786 · Post by **Solo786** » Mon Sep 10, 2007 1:57 pm

on factory ecu - the management is very carefully tuned so that the engine receives a stoichiometrically correct fuel/air mixture - no doubt car manufacturers spend millions and countless hours of testing to achieve these results..

with aftermarket management the tuner sets the air/fuel ratio mixture so i reckon its down to the knowledge and skill of the tuner

from what i heard on forum - craigs(Life ??) Abf is light on fuel - running on a perfect power management..

so it maybe possible to get good fuel cons - depending on who tunes the car

EX-DOHCTOR · Post by **EX-DOHCTOR** » Mon Sep 10, 2007 1:59 pm

I think it depends on your driving style and map settings.

True to a degree.

I've been limping around town lately trying to see if I can get some extra KM's out the tank.

No difference at all.

I am hopefully going to have the car dyno'd on Wednesday night.

Maybe that'll help with the overfueling.

I am switching to MP9 so that I can avoid the "winter map" syndrome I had to deal with this past winter.

Car was fine in the summer (400 - 430KM's a tank), the moment it got cold everything went for a ball of sh!t and it's pretty much stayed that way.

Plus there's the whole, 10 - 15 minutes cranking session every morning which is aggrevating me like you have no idea!

Atleast MP9 can run the factory idle motor.

Post by **Life-GP** » Mon Sep 10, 2007 2:01 pm

power = Air + Fuel.

Dieter · Post by **Dieter** » Mon Sep 10, 2007 9:14 pm

I also have dicktator on my 2l 8v, and also get around 320km on a tank (44 l). I have been told to take my car for a redyno at someone else who knows dicktator (eg. Chris Dicks designer of dicktator) . some people tune different. that's the only way to know for sure that it's tuned right.

LittleG · Post by **LittleG** » Mon Sep 10, 2007 9:53 pm

Well for starters guys like Bosch spend months tuning systems to get them to be good all round. Tuners have an hour or two to try get similar results. Also tune for Power more than economy cause if they tune a car and get average figures guys lose credibility. Cause when the guys leave the rollers first thing your hear about are the power figures not economy numbers

My MK2 (Mr Turbo) ran pretty well and got decent consumption by comparison. 11km/l was not uncommon. 12+ was good going with some decent driving. Some spirited driving would change that figure considerably though...

ruan9n · Post by **ruan9n** » Mon Sep 10, 2007 10:17 pm

I have a 1.4 16v (yes I know) polo with FF and cone and the factory mp9. Full tank is 55L. I tend to do a lot of hard driving and I get 580km per tank!!!

Jetta2 · Post by **Jetta2** » Mon Sep 10, 2007 10:37 pm

Before the supercharger, I was getting around 430-450 km on a tank with mixed driving in the Jetta. 1800, flowed head, 276 cam and Gotech.

Dieter · Post by **Dieter** » Mon Sep 10, 2007 10:40 pm

Hi there Jetta2

did you drop your compresion on your motor when supercharging it?

Jetta2 · Post by **Jetta2** » Mon Sep 10, 2007 10:41 pm

Dieter wrote:Hi there Jetta2

did you drop your compresion on your motor when supercharging it?

Yup. Read the thread and see......

Dieter · Post by **Dieter** » Mon Sep 10, 2007 10:43 pm

on what page?

Dieter · Post by **Dieter** » Mon Sep 10, 2007 10:46 pm

I see you droped it to 8,8:1. do I have to put in forge pistons or can I only space the head?

EX-DOHCTOR · Post by **EX-DOHCTOR** » Tue Sep 11, 2007 9:21 am

You guys are rapidly getting off topic

Looty · Post by **Looty** » Tue Sep 11, 2007 12:38 pm

I am switching to MP9 so that I can avoid the "winter map" syndrome I had to deal with this past winter.

Car was fine in the summer (400 - 430KM's a tank), the moment it got cold everything went for a ball of sh!t and it's pretty much stayed that way.

Plus there's the whole, 10 - 15 minutes cranking session every morning which is aggrevating me like you have no idea!

Atleast MP9 can run the factory idle motor.[/quote]

I have found out how to eliminate the problem as I have the same problem. A cold start injector/valve needs to be installed and hooked up to the management system. Going to give this a try.

EX-DOHCTOR · Post by **EX-DOHCTOR** » Tue Sep 11, 2007 12:49 pm

I have found out how to eliminate the problem as I have the same problem. A cold start injector/valve needs to be installed and hooked up to the management system. Going to give this a try.

Hey man,

I would've gone this route if the Digifant idle stabilization valve didn't cost R5000

And that's just one component of the system that you need.

For the same money I am switching to the latest Management including fitment and dyno-tuning

Looty · Post by **Looty** » Tue Sep 11, 2007 12:59 pm

I would've gone this route if the Digifant idle stabilization valve didn't cost R5000

I've been given a price of R1700, don't know if it's the same thing

Feel your pain though

EX-DOHCTOR · Post by **EX-DOHCTOR** » Tue Sep 11, 2007 1:15 pm

Idle Stabilization Valve: 037-906-457C

This is the part number.

Looty · Post by **Looty** » Tue Sep 11, 2007 2:12 pm

EX-DOHCTOR wrote:Idle Stabilization Valve: 037-906-457C

This is the part number.

Thanks, spoke to the from VW now, he says the cold start valve is something else. Didn't get part number though.

joggiep · Post by **joggiep** » Tue Sep 11, 2007 4:01 pm

Ever heard of closed loop Lamda ?!?

Will sort out the consumption issues with some proper mapping.

Why oh why,fuel consumption,mp9 vs aftermarket

Why oh why,fuel consumption,mp9 vs aftermarket

Re: Why oh why,fuel consumption,mp9 vs aftermarket