bit more omph from 300tdi help please

right now ive got the starting sorted ( new starter motor and cable )

ime after a bit more pull

its a 300tdi with throtle cable not fly by wire

i was at the lights the other day and a tdi left me in a plume of smoke and he was gone

on my old transit i tweeked the diesel pump a little till i got a nice little diesel haze when pulling hard

i am a trained diesel engenear but not had much experance with disco's

Back of pump, maximum fuel screw with anti tamper collar.
Screw in for more power and smoke

are you saying ur tdi is lacking power or you just wanna have more?

I am sorry to Hi Jack this thread but am rather interested in this myself. We have His and Hers Discovery's. The latest one we have bought is my Mrs's which being honest leaves my 300tdi for dead.
The pull off in mine is crazy..... where as Mrs's firers away.. the only thing I can see that looks slightly different is the Fuel Pump..

Mine is a 1995 300tdi
Mrs' is a 1996 300tdi

I have decatted mine, removed the egr, new air filter, fuel filter, oil changes & filters, fitted a bigger intercooler and still slow off the mark.. I aren't expecting it to be like a Subaru Impreza but when you get out of one then straight into the other the difference is obvious...
However once I have mine going, I dont have an issue it goes great...

Does anyone have a picture of this screw on the fuelo pump that needs screwing in at all? how far do you turn it in? or is it trial and error?

Thanks in advance

daz

here you go . http://www.landyzone.co.uk/lz/f8/sluggish-disco-not-any-more-146991.htmlive done it and its easy, with very little smoke . ive also turned the max fuel screw on another 300 tdi but the smoke was way too much but the power was crazy .it had me stuck to the seat .

Get yourself a Alisport Hybrid T28 turbo....mine flies!

I do have a decat exhaust, K&N panel, Alisport full width cooler, boost and pump up aswell though

MudHunter said:

are you saying ur tdi is lacking power or you just wanna have more?

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nar dosnt lack power , does 90mph easy just want a bit more pull from stand'still
its got egr gone mod , and no cat

cam any one tell me why you cant just pull the actuator pipe from the turbo to gain more power ? like a bleed off valve?

as long as you block end of pipe so you dont loose boost feed to pump

Dirtneewbie said:

cam any one tell me why you cant just pull the actuator pipe from the turbo to gain more power ? like a bleed off valve?

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I was told about doing that with my Subaru Impreza, but a wizard I know said that the turbo will then keep boosting, eventually destroying it.....

i have taken air bleeds of most turbos i had cossies, evos , nissan 300 tt and they have all give a nice healthy bhp increase and boost presure for very cheap money, just wondered why this cant be done to a disco with out the need to adjust the diesel pump

my guess would be low pressure turbo in disco VS. high pressure turbos in the ones you've mentioned

Then again I'm no mechanic and thats just a guess

thanks Dr Evil that might explain it then

hello all

Just one thing you do have to be careful on with diesel engines, if you advance the fuel to much you will have a hotter detonation in the piston chamber were the glow plug sits. Over time this will melt the piston crown cause more piston slap and finally destroy the engine. I have had this with an old diesel engine were some one fitted the timing belt out on the pump settings. In the end I had to rebuild the entire engine.
As for increasing boot best to increase size of pipes to intercooler and increase intercooler itself. This will allow same psi pressure into engine but more of it so engine does not starve itself when hard accelerating. If you increase the PSI into the engine by increasing the waste gate settings you could again damage pistons and seals. Problem is the older the engine the more likely it will just give up under the strain.

chears for all the tips
well just done the 3 pump adjustments through top of pump 1 x full turn on top bit , 3rd turn on diaphram , and half turn on on cogged wheel , it just smokes a little if realy booting it
its realy woken it up and i know its got more to give but its good as it is

steve911 said:

hello all

Just one thing you do have to be careful on with diesel engines, if you advance the fuel to much you will have a hotter detonation in the piston chamber were the glow plug sits. Over time this will melt the piston crown cause more piston slap and finally destroy the engine. I have had this with an old diesel engine were some one fitted the timing belt out on the pump settings. In the end I had to rebuild the entire engine.
As for increasing boot best to increase size of pipes to intercooler and increase intercooler itself. This will allow same psi pressure into engine but more of it so engine does not starve itself when hard accelerating. If you increase the PSI into the engine by increasing the waste gate settings you could again damage pistons and seals. Problem is the older the engine the more likely it will just give up under the strain.

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I was always told the detonation was hotter when the mixture was leaner

leaner burn hotter ,advancing to far gives knock ,you can remove pipe and block it so no boost is lost through it ,it will improve top end as wastegate will now not open ,very common and not seen any problems with doing so ,high performance cars are different mattter as whole system is on edge of whats possible tdi isnt anywhere near

What happens if you wind the turbo right in on the actuator?
Does it increase boost psi?
Does it get too hot and go bang?

if you shorten rod between waste gate and actuator you delay or stop wastegate opening ,increases boost ,wont hurt

Dirtneewbie said:

cam any one tell me why you cant just pull the actuator pipe from the turbo to gain more power ? like a bleed off valve?

Click to expand...

Never do this on any engine The turbo will just continue to boost until it eats itself that or the whole engine will det itself to death. You can fit a boost valve (gated ones are better than bleed valves) to up the boost a few psi but never just take the actuator feed off.