my94wrx

iTrader: (4)

hi just brought a slip jointed up pipe (think its a hayward and scott) which the previous owner had used nots and bolts to mount the turbo, anyway brought some subaru studs to find the holes are way to big, is nuts and bolts the only way to mount the turbo? also what is the bore size of the standard oe up pipe? as this one is 51mm, thanks

shep_UKSpec

iTrader: (3)

Fitted my up pipe on sat, nuts and bolts should be fine just think thats all your exhaust is held together with. crap job to do on your own took me 4 hours on my own!!

mit

iTrader: (10)

I had to drill a stud out my up pipe on my last car, as it sheared off being so rusty, so had to nut and bolt it after, had no problems with it.

shaggy6

iTrader: (2)

do you get bring the up pipe down or up pass the turbo?

mit

iTrader: (10)

shaggy6

iTrader: (2)

i mean do you pull it down past the heads or remove the turbo and pull it out through the top lol..

mit

iTrader: (10)

I had the headers off when i did mine, so droped it out the bottom.

shaggy6

iTrader: (2)

hmm.. must be me been a donut.. ive got my manifolds off so it should just pull down then?

mit

iTrader: (10)

I removed the heat shield round the up pipe, but still had to bend the heat shield mounting bracket flat on the up pipe to pull it out, as it was in the way, and catching.

shaggy6

iTrader: (2)

sweeeeet...ill have another bash at it 2moro! thanks for the advice mate.. lets hope it will get me somewhere lol!

bruce

iTrader: (5)

It also helps if you undo the drivers side engine mounting and jack the engine up 3 -4 inches. Gives a good clearance then to get the up-pipe out.

shaggy6

iTrader: (2)

Cheers matie.. another good pointer!

my94wrx

iTrader: (4)

thanks for the replies lads, but back on topic has ANYONE fitted a h&s up-pipe?? and does ANYONE know what the bore size is of the standard up pipe?

shep_UKSpec

iTrader: (3)

2.5" is the standard size, H&S, make both sizes what you got?

Shmerman

iTrader: (14)

2.5" up-pipe?????? Good luck spooling your turbo below 4k with that!

I have a H&S up-pipe and I believe they are around 51-52mm the stock uppipe is somewhere around the mid 40s i think.

my94wrx

iTrader: (4)

Sherman, can you tell me did you have to use nuts and bolts to hold the turbo to up pipe? also did you notice any additional lag from fitting the H&S up pipe?? cheers.

Shmerman

iTrader: (14)

I used the original studs.

On the lag front I cant really comment.

I changed the headers, turbo and up pipe all at the same time. If i stick with the same turbo I will be putting the oe uppipe back on or fitting a smaller diameter aftermarket one.

I get one bar @3k rpm in 4th gear (5spd) on a vf35. 2lt, uk heads, ported oe headers.

my94wrx

iTrader: (4)

cheers for that mine must of been drilled out then, why would you be putting the original one back on or opting for a smaller diameter one? reduce lag?

Shmerman

iTrader: (14)

yes, so its spools quicker.

my94wrx

iTrader: (4)

cheers mate that's answered my question.

Turbotits

iTrader: (2)

If you have the up-pipe off the car. Put the bolts through the holes facing upwards and tack weld the head of the bolts to the up-pipe. In effect you now have studs. Much easier to tighten up etc.