SP owners T Piece Mod WARNING

roshmx5 · Postby **roshmx5** » Sun Mar 12, 2017 1:18 pm

Hi members
If you have done the t piece mod check your boost via a boost gauge.
Mine was spiking to 15psi sitting around 10psi.
Went back to original set up, no spiking maximum boost is 8psi.

wasp47 · Postby **wasp47** » Mon Mar 13, 2017 8:56 am

Hi Would someone mind explaining the T mod
Cheers
Steven

Black_Penguin · Postby **Black_Penguin** » Mon Mar 13, 2017 9:09 am

The stock setup has the wastegate reference boost just after the compressor, the T-piece mod has you reference boost just before the throttle so the drop in pressure caused by the intercooler is no longer there.

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roshmx5 · Postby **roshmx5** » Mon Mar 13, 2017 9:41 am

Here is some info

93_Clubman · Postby **93_Clubman** » Mon Mar 13, 2017 10:32 am

15 year old car with multiple owners, & probably multiple workshops, so it's possible minor changes have been made that haven't been communicated or have been long forgotten.

Daz · Postby **Daz** » Mon Mar 13, 2017 11:08 am

Wow, something else is going on surely !

Back when they were new, some owners had their original short hose between the turbo and actuator melt causing the actuator to do nothing and a corresponding boost frenzy. These served as a warning to the rest of us ! Is the hose used in the mod clear and referencing manifold correctly ? Could also be the actuator, but I assumed you returned to stock and its functioning fine ?

roshmx5 · Postby **roshmx5** » Mon Mar 13, 2017 4:36 pm

Acctuator is fine tested it with air compressor. Happy to keep the way it is set up to stock. Car runs smoother

Tezzax5 · Postby **Tezzax5** » Mon Mar 13, 2017 5:00 pm

If your still running the plastic BOV. Check that out as well as you need to treat them as a consumable service item.
When they get a bit of wear on them the diaphragm inside can get a little notchy.

roshmx5 · Postby **roshmx5** » Mon Mar 13, 2017 5:27 pm

Cheers Tezza. I have two BOV. One stock and the other off a Porsche. I might upgrade to a metal one

Daz · Postby **Daz** » Mon Mar 13, 2017 5:35 pm

Tezzax5 wrote:If your still running the plastic BOV. Check that out as well as you need to treat them as a consumable service item.
When they get a bit of wear on them the diaphragm inside can get a little notchy.

I am still running the original, cant say I have really notice any degradation, but the car is still has < 45k.

Where do you get them Tezza ? Is there are part number ?

Tezzax5 · Postby **Tezzax5** » Mon Mar 13, 2017 5:58 pm

Hi Daz long time no online chats...

Bosch BOV Bosch BOV 0280142103 2301020740 is the one you want.

Danny and boys at Automotive + got my last one for me but that was a ages ago....

Tried the $2 mod and hated it, Tried the turbosmart bov , spring that came with was too soft (flutter drove me crazy).

Went back to the plastic bosch and happy enough with it for the sort of driving that i do.

Daz · Postby **Daz** » Mon Mar 13, 2017 6:18 pm

Yeah I dont get on here much, check in from time to time !

I have one of those turbosmart BOV's in a box somewhere, never fitted. The car seems fine to me, but I dont drive it much. I remember people saying they smoothed the part throttle jerk a little by replacing the BOV but I never thought it was that bad in mine... they all seemed to be just a little different !

roshmx5 · Postby **roshmx5** » Wed Mar 22, 2017 2:09 pm

Just an update guys was at mechanics today. My boost gauge should have been connected at throttle body not manifold. Put T piece back in and full boost is 7-8psi. No spiking.