i no this has been covered but what would you lot go for the j or h

thanks:thumbup:

standard - unless you have lots of mods that are causing issues!

yeah mods i have

full turbo back exhaust

ecu remap

4 bar fpr

piper air filter

thanks

But are you having any issues? like surging?

yeah sorry big time what one should i go for

thanks

I had problems with surging on my remap and moving to the J and doing the n249 bypass did help but the cure was a map tweak. I have now gone back to the original F valve and no noticeable difference

hello mate would you beable to explan how to do the bypass mate

thanks

do a search and it will bring up threads with pics. But it is really easy. you can just tap into the FPR line (it is better not to cut the FPR line, instead just get a long enough piece of pipe to put a small bit between the FPR and the T piece, that way you can put it back easily if you need to) and run a new bit of pipe to the top of the DV, then blank the loose pipe with a bolt and some PTFE and a hose clip.

what this mod does is take the control of the DV away from the ECU and gives it to the engine(vacuum) like a normal system - it does mean that the ecu has 1 less way of restricting the engine when it needs to but it can still use the n75 and the throttle.

so what is the n249 bypass and what dose it do

what this mod does is take the control of the dv away from the ecu and gives it to the engine(vacuum) like a normal system - it does mean that the ecu has 1 less way of restricting the engine when it needs to but it can still use the n75 and the throttle.

hth