Thread: 300 TDi Torque/Power Curves

So the charge is only cooled by the original single I/C after both turbo's?. Pat

Originally Posted by PAT303

So the charge is only cooled by the original single I/C after both turbo's?. Pat

Yes. Intercooling loads are quite low. 15kw max so standard items will cope. Full width radiator and intercooler would always be better though.

I want 14psi at 1000rpm, and that doesnt have to keep climbing to stupid levels at higher rpm. Just low down torque please

Originally Posted by uninformed

I want 14psi at 1000rpm, and that doesnt have to keep climbing to stupid levels at higher rpm. Just low down torque please

How much have you got now and at what rpm? The 2.8 with the VNT should be significantly better than the 300tdi.

My 4BD1T has 10psi by 1200rpm. Pretty rough asking full torque at that rpm in high gears but It's fine accelerating through.
Needs a heavier flywheel.

Originally Posted by Dougal

How much have you got now and at what rpm? The 2.8 with the VNT should be significantly better than the 300tdi.

My 4BD1T has 10psi by 1200rpm. Pretty rough asking full torque at that rpm in high gears but It's fine accelerating through.
Needs a heavier flywheel.

I dont know I just blow them up!!! haha.

I can atest to the talk of VNTs being troublesome, and that not counting mine failing recently (most probably fatigue related due to original run away)

your 4bdit sounds like it would pull my trailer pretty good

Originally Posted by uninformed

your 4bdit sounds like it would pull my trailer pretty good

It pulled this trailer pretty good. 300tdi getting a ride home.


Perhaps you need a Perentie.

Originally Posted by Dougal

It pulled this trailer pretty good. 300tdi getting a ride home.


Perhaps you need a Perentie.

I need alot of things, money is one of them

Originally Posted by rick130

I think you're right it's more a combustion pressure issue, but they do run better with more advance, they need to rattle to go well !

They need to rattle to go with stock boost. But more boost and more fuel while not over-advancing the timing could give us more power/torque through higher average combustion pressure while keeping the peak combustion pressure about the same.

Originally Posted by rick130

John cranked a few extra degrees into his bolts.
They aren't TTY, although everyone thinks they are. I'll be using ARP bolt lube when I do my head, just to make things more consistent.
ARP will make a up a stud kit, but it costs $$$, and whilst I'm not as down on the Tdi as John, I think he's right when he said it starts to become the same as polishing a turd.

Yes I know John's opinion of these.

Polishing isn't the only option. There's also chrome plating and even rolling in glitter.