Keep 306 HDI or buy Fabia VRS

[toseland]

Yeah VAG shite is basically jump on the bandwagon, fit this uprated turbo that bolts straight on, this intercooler set that is £ra*e i work opposite gwent vw who do all this.. 800 quid for turbos, 1200 for big brake set up, and they ALL always sound rough as.. I bet there is only a handfull of turbos ever tried on a pd, and alot more for xuds.. There was a hdi engine running 400bhp on here, that tractor pulling guy? Why didnt he go for a pd i wonded?

Btw im not biased i drive an alfa 2.4 so not even close to any of them, but again with those, only a few people have changed the turbos to 20v ones because thats all that will fit with just a map and no bodging

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there IS a HDi engine running 400+ BHP reliably,  he has a budget of 1000Euros per year and runs chronic boost (over 7bar peak) reasonably reliably..

some of the work done includes

stronger valve springs,
increased head oil pressure (custom, simple mod) to assist stronger springs
forged rods and pistons
HUGE turbo, un-wastegated
Scania V8 injectors.
skimmed and faced head and a little machining work on the ports and valve seats.


That doesn't seem like a huge amount of work



The lifters on the VAG lumps are shit. Cams on the VAG engines are shit.  Primarily because they have thinner cam lobes than most (all) other engines.. so start giving them tune and they start to shit cams and lifters like the morning after a vindaloo and beers.

things that screw lifters on PD engines include... sustained higher speed driving (that should be read, motorway speeds 70mph+) any sort of tune, Longlife servicing.. not using a specific oil type.

I have seen serious cam wear on engines with as little as 70000 miles,  these weren't tuned beasts. these were standard family golfs with yearly oil changes..

http://www.evvo.co.uk/xf/threads/tdi-pd-...-of.20496/
That post there was a quick google of PD cam failure,   and highlights the problems.


I have seen the camshaft on a HDi engine with nearly 800000 miles on it and it looks good as new. (no, not a new head either) cant say I have seen that many PD engines with over 200,000 miles on.