VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => IDI Engine => Topic started by: darrenjlobb on December 22, 2009, 01:34:25 pm

Title: More fuel faster....
Post by: darrenjlobb on December 22, 2009, 01:34:25 pm: 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
Title: Re: More fuel faster....
Post by: rabbitman on December 22, 2009, 03:42:15 pm: What engine is this for?
Try this, http://www.vwdiesel.net/forum/index.php?topic=21600.0 (http://www.vwdiesel.net/forum/index.php?topic=21600.0)
Title: Re: More fuel faster....
Post by: darrenjlobb on December 23, 2009, 04:44:08 am: 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...
Title: Re: More fuel faster....
Post by: 55eta on December 23, 2009, 03:50:58 pm: 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
Title: Re: More fuel faster....
Post by: darrenjlobb on December 24, 2009, 01:49:26 am: Are 12mm pumps + 5500rpm a good idea though...?
Title: Re: More fuel faster....
Post by: MJF on December 24, 2009, 01:57:38 am: Sure, why not. Had no problems, revd ~5800 every day.
Title: Re: More fuel faster....
Post by: 53 willys on December 24, 2009, 12:33:56 pm: 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..
Title: Re: More fuel faster....
Post by: anto on December 24, 2009, 02:47:30 pm: 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?
Title: Re: More fuel faster....
Post by: darrenjlobb on December 25, 2009, 02:28:17 am: 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!
Title: Re: More fuel faster....
Post by: anto on December 25, 2009, 05:27:38 am: 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?
Title: Re: More fuel faster....
Post by: darrenjlobb on December 25, 2009, 10:41:34 am: 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?
Title: Re: More fuel faster....
Post by: Rabbit on Roids on December 25, 2009, 10:47:30 am: are you running an LDA?
Title: Re: More fuel faster....
Post by: darrenjlobb on December 25, 2009, 11:13:34 am: Yeah peugeot lda, which ive grinded for extra travel....
Title: Re: More fuel faster....
Post by: 53 willys on December 26, 2009, 08:07:38 am: Quote from: darrenjlobb on December 25, 2009, 02:28:17 am
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 ;)
Title: Re: More fuel faster....
Post by: 53 willys on December 26, 2009, 08:17:53 am: Quote from: anto on December 24, 2009, 02:47:30 pm
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 (http://www.vwdiesel.net/forum/index.php?topic=21059.0)
and thats pretty much it for the "main mods"
Title: Re: More fuel faster....
Post by: Rabbit on Roids on December 26, 2009, 09:10:00 am: thats why ive never bought a new pump head, everyone selling them does not include springs. where do you get the right springs for the head without buying a 500+ dollar brand new bosch head?
Title: Re: More fuel faster....
Post by: 53 willys on December 26, 2009, 09:39:45 am: Quote from: Rabbit on Roids on December 26, 2009, 09:10:00 am
thats why ive never bought a new pump head, everyone selling them does not include springs. where do you get the right springs for the head without buying a 500+ dollar brand new bosch head?

you just gotta know what part numbers you need...the springs are instock at almost any "good Bosch dealer" and are only $40... 8)
Title: Re: More fuel faster....
Post by: darrenjlobb on December 26, 2009, 03:45:41 pm: I used the return springs from the 11mm donor pump....thats correct right...?