Thread: How to get more hp out a tdi 300

Originally Posted by rangieman

So has any one done this tweak and what were the gains and negatives

Well, Ian from Thermoguard has, I have, and a stack of others on here and OS have tweaked the pump.

Bear in mind I also have a 3" exhaust.

Gains. The ba$tard actually accelerates from idle now, revs like all buggery and pulls up hills better than our TD42T Patrol.
Downside. Uses a bit more fuel, (up @ 0.5l/100km) blows a big puff of smoke at wide throttle openings/very low revs.

I'm just waiting for my new EGT and I will be following Ians guide ASAP.

LRH

There's this post in Outerlimits about the 300tdi worth having a read through

http://www.outerlimits4x4.com/PHP_Modules/phpBB2/viewtopic.php't=79161&start=0&postdays=0&postorder =asc&highlight=

When we stayed at the caravan park in Hay last week i got talking to the guy who owned the place and he had a classic rangie with a 300Tdi in it and he had a guy in melbourne tweek the pump (which i assume is the same as the one everyone is talking about) and the power out put increase he reckoned was awsome he gave me a copy of a dyno print out and the power increased considerably.

At 100km/hr power increased from 32kw and 197Nm (at the wheels) to 57kw and 347Nm (at the wheels). He reckoned it was a totally different car to drive. Matt

is that right , that is almost twice as much power

Yes I did it to my brothers Tdi. And what a difference you can't feel the turbo come in anymore the power curve is very consistent he even dragged off a mates L/C which has had $6500 spent on the engine to make it go faster. Negatives there aren't any, no noticeable extra fuel consumption. Just more power down low. Highly recommended will be doing it to mine when I get one maybe this Saturday.

If this is the case why didn't the factory engineers do this before sale, wouldn't it be in the companys best interest to sell a more powerful motor?
Well seen as I have 2 x 300TDi's I will tweak one and use the other as a control to compare.

Dirty Dawg - The engineers in the factory have to design an engine which will run on a wide variety of fuels (quality wise) while complying with various noise and emission requirements. They also want to be able to guarantee some sort of extended engine life. They also have to deal with the variable end results which mass production gives. Therefore they give a fair leeway between safe operation and optimum output.