Fuel Cut Defender

[Polabear]

Just to clarify something for me please...

I am running 0.9 Bar with a boost controller. I now have the spiking nearly under control, and thus the constant pressure being held is 0.9 and below.
Not getting fuel cut anymore since adjusting the BC, was getting it quite often before, at various levels of boost.

Is the stock ECU providing enough fuel, i.e. is it providing more fuel now than say if it were only boosting to 0.5 Bar? Or is there a chance it could be leaning out quite badly?

I will be doing a few hrs RR soon, so I should find out then anyway, but I was just asking for opinions..

IMHO, BIGGER Fuel pump is the first stage to go to.......rather than FCD...then BANG!!!!! at present my BC is turned off for this very reason...

[enigma]

IMHO, BIGGER Fuel pump is the first stage to go to.......rather than FCD...then BANG!!!!! at present my BC is turned off for this very reason...

A bigger fuel pump wont help unless you increase the duty of the injectors or the size of the injectors beyond the capacity of the fuel pump. I changed mine to ensure that I had enough spare to run the nitrous (essentially another injector)

[valmes]

Just to clarify something for me please...

I am running 0.9 Bar with a boost controller. I now have the spiking nearly under control, and thus the constant pressure being held is 0.9 and below.
Not getting fuel cut anymore since adjusting the BC, was getting it quite often before, at various levels of boost.

Is the stock ECU providing enough fuel, i.e. is it providing more fuel now than say if it were only boosting to 0.5 Bar? Or is there a chance it could be leaning out quite badly?

I will be doing a few hrs RR soon, so I should find out then anyway, but I was just asking for opinions..

Do you use FCD? Consult with RR guys... They will tell you for sure (with wide band) if you're leaning out on this setup. IMO, it should be fine up to 0,9 bar... but I raised FP just to be on a safe side...

Can't wait to see pictures from Dave They just might turn me into "vegetarian", boost-wise ))... nah, I'll just buy another engine!

[enigma]

IMO, it should be fine up to 9,0 bar... but I raised FP just to be on a safe side...

WOW! :rolleyes5

Have you been on the Vodka?

[valmes]

"WOW!

Have you been on the Vodka? "

No... it's too early!

Of course it should read 0,9 bar

Corrected it.

[zentac]

The standard injectors will quite happily run an uprated pump, I am and they are fine but you need a fuel controller or similar and get it mapped properly.

[enigma]

The capacity of the pump doesn't matter unless it is not enough!

You can have a pump that pumps 1000 litres per second and you wont gain anything (except a flat battery!) The fuel pressure is set at 43psi and the flow required is determined by the injectors.

[zentac]

Mine was running lean with the FTO pump, so had to uprate it.

[valmes]

Stock FTO (6a12 NA) pump vs. VR-4 (6a13TTI) pump... there is a difference!!!

[chris g]

I cannot help but have a smile reading this thread

I remember the discussions here about doing things to the engine to protect it/ensure longevity if increasing boost/pursuing more power

And here we are with a number of blown engines amongst us

It seems making changes and checking value of these changes by driving in a straight line/to still be the fastest/have low ET does not work out in the end

Unless you want to loose the use of the car and sell scrap engines

Whereas you could really enjoy the speed AND handling AND 4wd AND ayc of the VR-4 by driving at tracks and especially 'ragging' it around the Nurburgring Nordschleife

And still have a car to drive AND sell on to another owner for them to enjoy the car

Hopefully around the bends rather than just up the straights

And still have a car to drive home and use each day

[Kieran]

...Hear what you say, but that's just...............



BORING!!! :sleep: :-D


It's not been a futile excercise, just as with car manufacturers... We've only learnt about these cars, where the limits are, what to do and what not to do by making them go faster... Mitsubishi didn't produce cars like the VR-4 and the EVO without pushing the boundaries. We're just continuing their research! :-b evil5: And you can't make an omlette without breaking a few eggs....

[valmes]

Kieran
:beerclash

I don't mind blowing up couple of engines for a "cause"!!!

[enigma]

Where do we start..........!!!!

It seems making changes and checking value of these changes by driving in a straight line/to still be the fastest/have low ET does not work out in the end

Unless you want to loose the use of the car and sell scrap engines

Seems to be working out just fine thanks Chris, as with all things its a calculated risk. Where I may push the engine to its ultimate limits, you are pushing tyres, AYC, etc etc to their limits and will pay the price in different ways. Each to his own I guess.

I lost use of my car for 3 days, thats not a big deal really! As for the scrap engine, well its not scrap at all, it will be rebuilt stronger and faster! Whether it be for my car or the project car, it will be back!

Whereas you could really enjoy the speed AND handling AND 4wd AND ayc of the VR-4 by driving at tracks and especially 'ragging' it around the Nurburgring Nordschleife

I hear what you are saying/preaching about the Ring, but having been on track I am always a little disappointed with it. After several minutes it gets a little samey and the buzz kind of dwindles. Sure the VR4 handles really well, but a track car it isnt. Its fun on the track, but then so would my wifes Punto be!

And still have a car to drive AND sell on to another owner for them to enjoy the car

No one will get their mits on my car, its in the family for the duration...........I love it so much!

And still have a car to drive home and use each day

My car gets used every day, and has clocked up 30k since I bought it 18 months ago. 1 New engine at £1000 in this time is small beans compared to the £6000 I have spent of fuel, £2000 on service items, £2000 on insurance etc etc etc.

At the end of the day we all choose to do different things with our cars, to me a standard car is a complete waste of potential! Until you have experienced the thrill of developing your own systems which aid or improve power, doing your own tuning, and releasing something that is truly fast.............dont knock it! :-b

Remember, I have taken a 6 second 0-60 car and turned it in to a sub 4 second one, and it still handles - you cant expect to do this on a budget without risks! Why do you think the RC Developments EVO cost near £200k? Or the Sumo Skyline even more!

[chris g]

Well, after 'timeworn defeatism', 'naysaying' its now 'boring'

The art of conversation is not dead then, at least as far as the witty brief response is concerned

Time to draw a veil over further posts I think

But before I go, Dave, it is a good track car at the Ring but despite how much I loved my VR-4 and would have preferred to keep it in the family, I cannot take it with me in the Air New Zealand 747 to Hamilton, NZ

It could have been exported by container but with a new job and a new home to get used to, dealing with the paperwork, specialised steam cleaning to protect NZ from microbes and viruses and relicensing for a year before maybe having to export it back to uk was just too much

Remember I am tired and defeated so this really was too big a task

Still, see what fun can be had in NZ - a new car, bungee jumping, river jet boating

Hope they are not too boring

Enjoy the straights Dave and dont go lean

[enigma]

But before I go, Dave, it is a good track car at the Ring but despite how much I loved my VR-4 and would have preferred to keep it in the family, I cannot take it with me in the Air New Zealand 747 to Hamilton, NZ

It may be a good track car, but its not a great track car as it stands. Same way that its not a great drag car as it stands. Tell me how quick do you lap? Can you beat the Jag Diesel?

Still, see what fun can be had in NZ - a new car, bungee jumping, river jet boating

Hope they are not too boring

Been there, done all that, dont forget glacier walking though.

Enjoy the straights Dave and dont go lean

Been there, done that too - I am sure it wont be the last time either!

[Kieran]

Kieran
:beerclash

I don't mind blowing up couple of engines for a "cause"!!!

Even in the UK, Dave's proved that a Blown VR-4 engine isn't a disaster. £1000 for a 2nd hand VR-4 engine with things like the turbos, the pumps, etc. still attached is a bargain!....


If it weren't for the small problem that my front wheels would never have any traction ever again, I would be tempted myself!!! :$

Oh well... A truly fast car isn't just about maximum bhp or torque... So for now my efforts will focus on making my V6 transmit it's power effectively, without the alarming wheel hopping action!! :rolleyes5

[enigma]

I have some good video footage of your car with its front left wheel smoking in 2nd gear!

It appears I was driving and you were commentating!

[Kieran]

I have some good video footage of your car with its front left wheel smoking in 2nd gear!

It appears I was driving and you were commentating!

....That's not difficult to achieve in Hordak! :$ ...

When Derek had a blast up the track in it, he came back after the run and said, with wide eyes, "It's all over the f&$%@#g place isn't it?!" "I don't know how you drive that in a straight line!!!" :$ :$

[enigma]

Can we recount what YOU said after driving Dereks car up the strip? Especially with the comparison to a standard VR4?

[Kieran]

Can we recount what YOU said after driving Dereks car up the strip? Especially with the comparison to a standard VR4?

Ok, before or after I picked my jaw up off of the floor? Have a look at the "Still the fastest" thread for my brief appraisal of Derek's car... :-D