I have read here and there that the path to increased power and performance on a 300tdi is to increase the intercooler performance.
If I were to obtain a larger volume intercooler, should I use this instead of or in addition to the existing intercooler? in running the the intercooler in series with the existing, is there an effect from to much resistance to air flow etc?
Any ideas all......
Thanks
No, dont use the existing intercooler in series (or any 2 in series), it's restrictive enough as it is, as well as too small thermally.
A good start is this one:
Tim..
I've not had a larger intercooler on mine, but a mate has, on an otherwise standard 300Tdi. Mine has instead had the egr removed, a complete clean-out of intercooler and all pipes, a de-cat exhaust fitted and a straight through centre exhaust replacing the centre silencer but keeping the back box and a snorkel .. ;)
Driving the one with the larger intercooler is good, with a fair bit more power and availability of that power all through the rev range compared to standard. It's a great way to increase power, IMHO.
When driving mine, however, there's a little less power, not much, but it's way smoother, more responsive and just heaps better than standard .. which makes it more useful and useable to me and what I do with it .. mostly green-laning and off-roading. If you don't use the extra power, say on-road in traffic or just bimbling along the mpg's are improved by about !2 - 15% too. If you use the power then mpg's remain 'normal' ish .. ;)
However ... my mates intercooler cost him ?400+ my bits cost ?25 for the de-egr, ?19 for the de-cat downpipe, ?10 for the centre pipe .. and ~ ?5 for the clean-up stuff (Paraffin!!!) ... less than ?100.
If you can get a larger, scrapped maybe, intercooler and hoses to fit cheaply then I'd go for it .. I wouldn't spend ?400 on a new one though. Cost effective (IMHO) it ain't .. ;) I fully intend to get a larger intercooler sometime early next year, but it will be a scrapyard one ... I reckon an intercooler and my mods together (the fuel pump's tweaked too) will make it extremely good ... ;)
I have no reference for a larger intercooler used in series with a standard one, but would guess that keeping two intercoolers in the system might negate any benefits of fitting a larger system. After all, you're trying to improve air throughput, not leave it strangled, as standard! I may be wrong, but that's my opinion.
;)
Easiest way without completely re-plumbing your front-end and spending hundreds of dollars....
Remove the cover of the anaeroid on the top of your pump (4 slotted screws). Remove cover and note rotational position of diaphragm inside (in relation to a clock-face.) Now pull out diaphragm with it's plunger. Remove small plastic-looking spacer. (Keep it if you want to put it back in later. This is a fuel stopper and is one of the differences between the tuning of a Defender as opposed to a Discovery). Under the large spring there is a knurled seat - wind it clockwise about
8-10 clicks. Replace large spring. Put a bit of vaseline on the end of the push-rod you took out earlier. I put a very small dab of moly-grease on mine. You'll see where the wear mark is on the bevelled bottom area. Replace rod/diaphragm in same position as you took it out. Replace cover and do up the 4 screws - make sure the diaphragm is sitting nicely....welcome to more fuel and more power.
Now ideally you would also wind in your waste-gate actuator in addition to this. (You want to shorted the rod between actuator and waste-gate). Wind it in about 8-10 turns or so. Careful though... it can be siezed from heat of manifold and you don't want to break it.
200Tdi is easy to adjust this.... 300Tdi is a bitch because some little bugger at Land Rover thought it would be nice to hide it on the engine block side of the turbo, so have fun getting to it.cheers, Craig Qld, Oz.
PS: I've done this to my 200tdi Defender as well as friends and customers when they complain about not enough power - the difference is quite astonishing. And the best part... it's all reversible in a matter of minutes if you want to sell the car to your kids !
Oh, and do you offer them a free engine once it blows?
Alex
Go ahead and try and blow it. We have a competition 300tdi running near 30 pounds of boost, full fuel and timing is so advanced that it's hard to start. Blows the Toyotas away and no engine problems at all.
Damage to engines is the fault of the idiot holding the steering wheel skimping on service and quality.
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