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+--- Thread: simple HDI mods (/showthread.php?tid=12034)
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simple HDI mods - Josh_Quant - 18-03-2013
Whats the best way to get some extra horses out of my brothers hdi??
1st thoughts where de-cat and remove center silencer and get a straight through back box...? does a HDI pass emission with no cat??
And can you blank or unplug EGR valve with engine management light coming on?
he wants to get a remap but has got the spare cash at the moment.
RE: simple HDI mods - Just Sean - 18-03-2013
Do the exhaust. do the remap.
RE: simple HDI mods - Toms306 - 18-03-2013
Shouldn't be any issues for MOT as diesels don't have an emmisions test, and a cat isn't needed on a diesel under the new regs either.
First thing I'd do is a remap...if you can scource one for your ECU number, it's easy enough to flash onto the ECU yourself.
You can blank the EGR without a management light afaik, it's not in the easiest location though!
RE: simple HDI mods - Just Sean - 18-03-2013
If you get the ECU number, someone close might be able todo it abit cheaper then a garage
RE: simple HDI mods - cully - 18-03-2013
(18-03-2013, 08:13 PM)Just Sean Wrote: If you get the ECU number, someone close might be able todo it abit cheaper then a garage
RE: simple HDI mods - Josh_Quant - 18-03-2013
(18-03-2013, 08:14 PM)cully Wrote:(18-03-2013, 08:13 PM)Just Sean Wrote: If you get the ECU number, someone close might be able todo it abit cheaper then a garage
havnt forgot mate lol
how much did you want to do it again?
RE: simple HDI mods - cully - 18-03-2013
lol
you have got to source your map i recomend Whippy or pro-steve
when you have come ask again
RE: simple HDI mods - Tom - 18-03-2013
Yeah dont go to a exhaust place and buy a map for £ra*e.99 #insidejoke
RE: simple HDI mods - Just Sean - 18-03-2013
i think you ment to say £400 fat ones for no power gains!
#insider
RE: simple HDI mods - cully - 18-03-2013
if you need me to read off your map to send to whippy or steve i can do that
i also have PP2000 here too so can read your codes and see if the MAF is working as it should
RE: simple HDI mods - Josh_Quant - 18-03-2013
Rough price of a map file?
RE: simple HDI mods - cully - 18-03-2013
£75 from pro steve
http://www.ebay.co.uk/itm/Peugeot-206-306-406-307-HDI-tuning-remap-file-service-/330884282791?pt=LH_DefaultDomain_3&hash=item4d0a3d79a7
RE: simple HDI mods - Josh_Quant - 18-03-2013
Ideal
RE: simple HDI mods - Poodle - 18-03-2013
Newbie, meet guide section; guide section, meet newbie.
This should get you started bud: http://306oc.co.uk/forum/thread-42.html It's a fairly good explanation, although the power estimations are a bit optimistic and "uprated" panel filters will munch your maf, particularly K&Ns it seems (you don't want that to happen btw). Actually, you can pretty much ignore the bit about induction, people are still using the standard airbox at stage 2 without apparent issue.The MOT still only tests for smoke from diesels, and although a bad stage 1 map could cause you to fail on that front, removing the cat is certainly not an issue. I guess you know this since you mentioned a dummy-box, but i'll say it anyway in case - the exhaust must have at least one box in to pass an MOT. The centre-box is pretty much a straight-through design anyway, so you could use that as a back-box if you're on a budget, save some extra pennies towards a map.
Blanking the EGR isn't particularly difficult if you've done anything mechanical before, it's just that access isn't great. Ideally you want to get the thing completely mapped out as well, failing that you will have to disable the air-doser - if you have one. If you just unplug both items the ECU will log a silent fault, however this won't affect running much and won't directly trigger the EML.
RE: simple HDI mods - Josh_Quant - 18-03-2013
ok cheers mate
that's a good write up!
what does a air-doser look like? like a throttle body?
And for the exhaust i was thinking of getting him to buy s16 or gti6 back box or do they have baffles to?
RE: simple HDI mods - vlj - 18-03-2013
(18-03-2013, 09:20 PM)Josh_Quant Wrote: ok cheers mate
that's a good write up!
what does a air-doser look like? like a throttle body?
And for the exhaust i was thinking of getting him to buy s16 or gti6 back box or do they have baffles to?
They'll make too much backpressure for the HDi, you are better off doing the centre box mod and welding on a tip if you want the looks of the 6 box
RE: simple HDI mods - Josh_Quant - 18-03-2013
not looks thinking of cheaper than buying after market back box
RE: simple HDI mods - vlj - 18-03-2013
You can pick up another centre box for like £15-30.. try and find an aftermarket back box for that price. Bar a straight piece of pipe I doubt you'll find anything that flows as well for anywhere near that price bracket mate
RE: simple HDI mods - Josh_Quant - 18-03-2013
yeah right!
whats the bore size? 2.25?
can't remove all silencers though so have to be back box!
anyone cut open and removed baffles out of stand back box? got a mig lol
RE: simple HDI mods - vlj - 18-03-2013
(18-03-2013, 09:35 PM)Josh_Quant Wrote: yeah right!
whats the bore size? 2.25?
can't remove all silencers though so have to be back box!
anyone cut open and removed baffles out of stand back box? got a mig lol
2.25 yep.
you can open up the backbox and just put a pipe through it so it still looks like a box - but by having the centre box there, and even cat - you've got your 1 box so I don't see the issue?
RE: simple HDI mods - cully - 18-03-2013
why bother buy a new centre section fit it to the car and cut up the old removed one and make a backbox easy!
even the flange's are right just cut to length and make a hanger
RE: simple HDI mods - Josh_Quant - 18-03-2013
very true and easier to mod back box than center section
RE: simple HDI mods - cully - 18-03-2013
(18-03-2013, 09:41 PM)Josh_Quant Wrote: very true and easier to mod back box than center section
wrong would be easyer to mount the centre box at the rear
than to cut open the back box weld pipe in and weld up box
RE: simple HDI mods - Jonny81191 - 18-03-2013
I have an HDi backbox for sale, just the box though with the flange on it, you'd need to source some pipe to fit on the back.
RE: simple HDI mods - vlj - 18-03-2013
(18-03-2013, 09:44 PM)cully Wrote:(18-03-2013, 09:41 PM)Josh_Quant Wrote: very true and easier to mod back box than center section
wrong would be easyer to mount the centre box at the rear
than to cut open the back box weld pipe in and weld up box
apparently not........
RE: simple HDI mods - Poodle - 18-03-2013
No probs.
Yeah air-doser looks a lot like a throttle body, disconnect and plug the vacuum feed and she's done, easy as that.
As said above, any direct-fit OEM petrol backbox will be worse than the standard jobby. Either do the mid-backbox conversion or empty out the current backbox or just replace the backbox with a bit of straight pipe, any of the three options will have the desired effect. Personally i'd keep the midbox and replace the backbox with a bit of straight pipe. Emptying out the backbox will make for a more boomy sound, don't know whether he'd want that or not...
RE: simple HDI mods - Jonny81191 - 18-03-2013
Mine sounds pretty good with a complete straight through to empty cat as a backbox, not too boomy. And it's considerably quieter than a full proper straight pipe.
RE: simple HDI mods - DeeTurbo - 18-03-2013
Here's the rear mid box guide http://306oc.co.uk/forum/thread-36.html
RE: simple HDI mods - Josh_Quant - 18-03-2013
I don't he will want it to sound like its got a big bore on it lol
keeping center box and replacing back box with straight through pipe we decided....
will breaking the cat out make it sound BOOMY then? :L or would it be better to get a decat pipe to keep noise levels quiet kind of?
RE: simple HDI mods - Arron - 18-03-2013
I had my silencer cut open and gutted. Makes quite a bit of difference to response but its not loud on idle or pootling