More fuel faster....

[darrenjlobb]

Hi guys...

Am currently building up a fairly uprated engine for my car, and are looking for even more power now.

The old pump was an 11mm head/plunger on standard camplate, with shimmed gov and more dynamic advance, but even with the fuel screw screwed right in, it would burn it all at 28psi...

So looking for more fuel...are 12 plungers the biggest avaiable? And from what vehicles, are these ok to rev to5500?

Is there any other idi cars that have camplates that have more lift? As this total lift must make a big difference.

Also, does anyone have any advice regarding the plunger return springs, more shims should mean it revs harder i assume? to allow the camplate to stay in contact with the rollers...wat shim extra are we talking about, 1mm?

THanks

[rabbitman]

What engine is this for?
Try this, http://www.vwdiesel.net/forum/index.php?topic=21600.0

[darrenjlobb]

I have already done that, as well as changing the gov cradle and arm for a differnet one with longer lever for more travel....the problem is im maxing it out...so i think i either need a camplate with more lift, or a 12mm head...

[55eta]

renault master 2.8 fiat ducato2.8  basicaly the same engines the renult 98 on and fiat 97 on also the vw lt2.8 tdi  all use 12mm pumps

[darrenjlobb]

Are 12mm pumps + 5500rpm a good idea though...?

[MJF]

Sure, why not. Had no problems, revd ~5800 every day.

[53 willys]

did you install the 11mm pump springs when you put the bigger pump head in???
I got more fuel then I know what to do with on my 11mm pump...thinking about backing it down to a smaller head..

[anto]

Whats your full list of mods on your pump then willy if you dont mind me asking?
Just to see how what ive done compares to yours?

[darrenjlobb]

Well ive got the 11mm head obviously, ive shimmed the entire gov arm solid, and mofied the idle spring so i can still have low idle with the max fuel screwed RIGHT in...

Ive changed the throttle shaft and gov cage for the vw one as its got more throw on the end, so more travel, ive also grinded the lda pin...but sadly, i dont have more fuel than i need..it burns it all at 28psi and wants more!

[anto]

darren are you not finding that your off boost smoke is terrible at the minute?
The 28psi cant be coming in very quick with that turbo, or does it spin up quite easily?

[darrenjlobb]

Yeh it smokes off boost like a bugger, ive just learnt to regulate my right foot..its the only way lol..

Infact, if im driving, off boost, and just TOTALLY flat my foot, it acually looses power, like bogs out.. im assuming just TO much fuel?

[Rabbit on Roids]

are you running an LDA?

[darrenjlobb]

Yeah peugeot lda, which ive grinded for extra travel....

[53 willys]

Well ive got the 11mm head obviously, ive shimmed the entire gov arm solid, and mofied the idle spring so i can still have low idle with the max fuel screwed RIGHT in...

Ive changed the throttle shaft and gov cage for the vw one as its got more throw on the end, so more travel, ive also grinded the lda pin...but sadly, i dont have more fuel than i need..it burns it all at 28psi and wants more!

I dont see 11mm pump SPRINGS in that list...my money says that's your problem...if you still have the stock springs you will never get enough fuel

[53 willys]

Whats your full list of mods on your pump then willy if you dont mind me asking?
Just to see how what ive done compares to yours?

my pump mods are..
11mm pump head AND SPRINGS!!!
gov mod(completely disabled)
ground VW pin
we did the timing mod..http://www.vwdiesel.net/forum/index.php?topic=21059.0
 and thats pretty much it for the "main mods"