How do,

Now, forgive me if this is what is called top and front entry conversation. I really have no idea.

I've got a FMIC and I'm trying to shorten the lenght of the pipes to reduce lag, and yes I know this is not the be all and end all, but every little helps. I'm looking at reverse mounting the inlet manfold, but I'm also considering this below mod, but I don't know if it can be done.

http://i180.photobucket.com/albums/x...njaffa/003.jpg

As you can see from the picture, where the charge pipe leaves the turbo and goes off towards the intercooler. It first goes in towards the engine bay, before looping back heading out of the engine bay via the off side wing.

Can I not twist the outlet pipe on the turbo, so the turbo pipe is facing the right way and the charge pipe can go striaght out towards the wing instead of looping in and out? In my mind that will eliminate the need for that loop and thus reduce pipe lenght.

 

the only way i can see you doing this is. rotating the turbo 180'

but since you have a classic, the turbo's 90' bend. would have to be changed, them the oil feed changed & the out pipe for the oil ect
in afect, it wouldent be worth the hasle

the other way to less the lag is more boost.
what sort of turbo you got?

 

TD05 running 1.2bar. Didn't want to wind the boost up as the eninge is a high miler.

 

your quite lucky then. how the hell is your header tank still in one peice.

for what its worth mate, you must have at least 440cc injectors anyway

the lag should be nothing at that psi level
the map you have should make it seem like theres no lag too

a bleed valve maybe?

 

Check my spec I've got 550 injectors.

What has boost got to do with my header tank?

At the moment my turbo doesn't really come alive til 4500 revs, I want to bring it down as much as I can. Adding my equal lengh headers really affective when boost comes in.

Plus I'm plannig more mods in the furture which will again I'm sure effect the boost, so I'm looking into this now.

Header tank, really has confused me. Boost is nothing to do with the coolant

 

Has anyone else done this mod, is it worth doing? IS there a way of doing it easier when changing my turbo. I'm buying a MD123T very soon if it helps.

 

becouse your risking it. as soon as you go aboth say 260 bhp or over. they normally go pop

corsing engine failing
i have a td05 & the boost starts to comes in at just over 2 & a half k
have you had a map done.

i'm only using 440cc injectors. but my money was spent to take the load

 

Its very easy to do, remove the turbo, remove the turbine housing, remove circlip and remove compressor housing, there is a pip on the centre bearing housing that locates the compressor housing, drill a new hole in the housing for the new location and reassemble, you will need a vice or a workmate to squash it back together (CAREFULLY)....not actually clocked it round, but have stripped and reassmebled my (now ported) turbo as I describe.

BUT as you have an elbow entry turbo you would also need that to be maschined off and replaced at the new right angle.....

Simon

 

[QUOTE=dabow;7582715]becouse your risking it. as soon as you go aboth say 260 bhp or over. they normally go pop
]/QUOTE]


Are you really trying to tell me an Impreza running over 1.2bar is at risk of blow its header tank??

Considering most Impreza on here run far more boost I very much doubt this, further more whatever on eart has the boost/bar pressure got to do with the coolant system??

I've never heard of anyone having problems with the header tank if they've taken their car over 260bhp. They is loads of Impreza on here between 300-500bhp, and the header tank is fine.

Either I'm not understanding what you are saying, or you have the wrong end of the stick.

 

[quote=jiffthejiffmanjaffa;7583158]i diden't mean anything about it at all. you just need to rotate the housing round ful stop, for the ic tubing

but, just saying. that you could do with changing the standard plastic header tank if you go any further

& yes a lot of people have had probs with the standard header tank on the earlly classics, i blew 2 before putting an alloy one on

like i said, as a precorsion. you should change it

 

I've have got an alloy header tank.

I think I understand what you on about. I've not updated my profile pictures in a while. but I have update the engine spec.

I've got a Forge alloy header tank now.

 

the one in the pick has the plaggy one on.

only 97 face lift came with an alloy one
like i said, wasen't picking foult. just pointing out an issue that most have seen

 

what up pipe have you got is it the larger size i had this prob on mine put the std uppipe back on back to normal spool i also have a fmic but i have the reverse inlet was told that it makes no diff really at my power level but it was done when i got the car did you get it remapped when you had the equal lengh headers fitted just putting ideas out there

oh and sorry breath

 

I've got a bell mouth de cat hayward and scott down pipe, and I had everything fitted at the same time and the whole lot mapped.

According to my mapper the power comes in at 3500 yet to me driving it it feels like 4500.

I'm thinking the problem is the equal lenght headers, I've read loads on them increasing top end power but making the engine laggy.

 

yeah reason i put std ones back on and tbh from what i have read and been told no need for them till silly power any way what about the uppipe did you change that as well

 

I put a thread on here not so long ago about reversing the inlet manifold to reduce intercooler pipe length, not sure if this would be of any use to you?

 

i had more lag when i had my de-cat on.
but since i changed to a sports cat & uprated uppipe.

the boost seems to come in quite early. again, just under 3k
but my set up seems to be less of what you have.

if you have a 16g td05. shouldent really kick in at over 4k

are you sure your turbo is spooling properly mate
i dont think by just de-creasing the lenth of your ic hoses, would make much a difference at all. as the first bit is narrow anyways

 

I don't understand why you've gone for a FMIC at this power level, sure with the MD321H/T o.k., but at less than 300 bhp seems overkill !

DunxC

 

Thats OK then I've got 330bhp

It was an investiment. I have a 2.5 build underway and a MD123T on order.

 

 

I totally agree. I don't know it all, but I know enough and that sounded a we bit wrong

 

i read something about bleed valves,& presure increase thats all

& regards the psi level, oops. just re-read it
but you shoulden't hacve as much lag as your saying with a 16g

even when i was using the standard uk ecu, the boost was kicking in at around 3/4k