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Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Mon Mar 08, 2010 11:52 am
by TopGear
Try neobrothers or salvo group.
They should have the parts you need. :wink:

http://www.neobrothers.co.uk/
http://www.salvogroup.co.uk/

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Mon Mar 15, 2010 8:05 pm
by Squidula
Finally got to a scrapyard today.

First one I checked out, had 2 NA 900/9-3s, and a 9-3 Aero. The Aero had everything I would have wanted missing. Its got chrome interior handles though, Im debating whether I want them though.

Second Scrap Yard, had a 9-5 with no engine. It also had tucked away, a very nice looking 9000 Aero in Silver. Got my first sit in one today as a result. Love the seats, want 9000 Aero even more now. It gave up its APC valve, for the princely sum of £10.

Tried driving the 9-3 up onto some small ramps Ive got, ended up with taking a little bit of my splitter off, not too impressed. So back to the old trusty jack. The compressor apc hose was a bit of a pig to get off, with that silly spring hose clip. Got it off in the end, and ended up using a small jubilee clip to replace it to save time. I lost one of the screws for the apc valve so Im thinking about riveting it in place. Its held in with cable ties at the moment during the initial testing phase.

I shortened the wastegate arm by 2.5 turns as suggested in this thread. Mine had no R clip holding it on, just rust.

Swapped ECU, all bits put back on, car started up fine, and idled ok. Left it for a few mins, then off I went on a test drive to get some ecu parameters on there. Seems to pull pretty well. Im convinced my gm900 had more grunt with the same ecu in it. Hopefully the ecu will sort out its settings better. I did set it up with cheapo petrol in though, its got Vpower in now.

Ive gotta be careful with the car for a while though, until I get a 6point subframe brace on it. Need to put exhaust sheild back on too.

A reasonably productive day though. Also loving that 9000 Aero.

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Mon Mar 15, 2010 9:29 pm
by TopGear
Nice write up squidula ;-)
Have you got a seperate boost gauge? It might be worth having one if you've adjusted your wastegate to make sure everything is set up right.

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Tue Mar 16, 2010 7:28 pm
by Squidula
Nah its something I need to get. I dont want to be drilling into my dash or anything, so need to figure out a temporary way of having a boost gauge to check base boost.

When I first started it up after swapping ecu, it all sounded fine. I went round to the front of the car to see what looked like loads of smoke coming out from the engine. Luckily was just some wd40 evaporating that I had squirting over exhaust manifold when releasing the wastegate arm lock nut. Gotta go buy an R clip too for peace of mind, since the arm isnt held on by anything, so a bad bump could in theory knock it off. Ill stick that clip on then put exhaust heat shield back on.

Next job, 6point subframe brace and piggy back rear arb.

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Wed Mar 17, 2010 11:57 am
by TopGear
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Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Sun May 30, 2010 1:52 pm
by srad1971
just read all these posts and was wondering about these apc valves, i have an 02 2.0lpt and was wondering if i get this remapped do i need to do the apc valve or is this for the older saabs only? help please i'm getting confused, also is a stage 1 (220hp) conversion ok with an auto box as someonr said its not stronger enough
chhers karl

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Sun May 30, 2010 2:16 pm
by TopGear
srad1971 wrote:just read all these posts and was wondering about these apc valves, I have an 02 2.0lpt and was wondering if I get this remapped do i need to do the apc valve or is this for the older Saab's only? help please I'm getting confused, also is a stage 1 (220hp) conversion ok with an auto box as someone said its not stronger enough
cheers Karl


Your auto box will cope with stage 1 easily. (mine is an auto)
As for the APC I think yours will be a T7, easily noted by the black DI pack. If so I'm not sure what needs to be done as I'm only familiar with the T5.
Your best bet is to put a post in the performance section as not as many members tend to visit this section. :idea:

Re: how to convert a lpt to a fpt

Posted: Tue May 10, 2011 9:06 pm
by RXX
9000anni wrote:I'll be doing this job tomorrow for my son, having just procured a non VSS ecu from a NG 900 SE FPT Coupe today.

My mate was breaking one today, No APC unit, so I'll have to use MBC until I get hold of the APC. Apparantly, the NG900 was a real flying machine ! he suspected it's been upgraded (Hirsh badge on the back and boosting well into the red zone)

Will let you know if I find any pitfalls.

The return pipe I mentioned earlier fits on the turbo body extension pipe, really easy to get at :)


Dont want to jack the thread so could you pm me how you tell if it has no VSS please

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Sun Mar 18, 2012 5:17 pm
by demonbiker
I have just bought a 9-3 lpt SE which has supposedly got a remapped ecu and apc valve, trouble is it goes really well BUT............ the apc valve is lying loose by the radiator, only 2 of the 3 hoses are connected, 1 to intake pipe, 1 to wastegate, the hose from the bottom of turbo is not connected to anything?? if you unplug the apc valve it doesnt make any difference,still boosts well and goes well???

It came with a std ecu, which when i fitted that, cuts boost when it hit 3k under hard acceleration but is fine when driving normally- suspect faulty ecu???

Am i going to blow it up??

:?: :roll:

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Tue Mar 20, 2012 1:11 am
by Squidula
Does it hit fuel cut off when giving it the beans? Itll feel like a massive misfire/hitting a brick wall.

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Tue Mar 20, 2012 1:25 am
by demonbiker
Accelerate hard it cuts boost/fuel

Disconnected the apc and re fitted the hose from
Turbo to waste gate , seems to have reset it to stock
map, not as much boost and a bit slower!
But 26mpg pottering around town! :)

May try the other ecu to see if it was the pipe off the waste gate causing boost cut?

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Tue Mar 20, 2012 3:04 pm
by Squidula
Disconnecting that pipe will stop the ecu from managing the boost, and allow the turbo to produce as much as it can before the ecu senses something is wrong and cuts the fuel. Shouldnt run the car for long periods without boost control. I would suggest you PM either Faero, or Jules_HT about getting the car remapped properly (Assuming you have a T5 engined car, if you have a T7 then contact Saabnoob).

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Tue Mar 20, 2012 4:00 pm
by demonbiker
I've basically put it back to std as I think what your saying is what was happening!
Now it's more sedate , boosts fine and runs better !

Re: SAAB 9-3 (hatch): Conversion: LPT to a FPT

Posted: Sat Sep 01, 2012 12:41 pm
by demonbiker
Re fitted the apc valve and hoses, trouble is only one has is marked C so that's on bottom or turbo, the other two hose aren't marked so had to guess which way they go tried them both ways round and left them with what seems to run best, my valve has all,3 outlets in a row on one side, top ,middle ,bottom, anyone know which is the correct way to fit the hoses?

:haynes: :?: