944 Turbo SE - Tuning Help !!!

[Keyzy74]

Me personally, I would start with a basic stage 1 tune up. Cheap and cheerful. Induction kit, Exhaust plus de cat, ecu re mapped (and chipped if required). This can make good in roads into power gains on the cheap, before having to start upgrading fuel, brakes, suspension etc..... If you're thinking about upping the boost, save a bit of extra cash and get an in care Greddy or Apexi boost controller. A very nice bit of kit that you could pick up 2nd hand from a JAP CAR forum. I had one on my old Skyline and MR2 Tubby. You can control the boost from inside the car then and have it set up properly for different driving conditions. As previously said though, don't overdo it or there be some costly repairs.

Enjoy

 

[9212PT]

ORIGINAL: George Elliott

Paul, we should first define easy[]

Fuel pump is potentially dangerous, but start by draining the tank. Then the condition of the fuel lines will determine the rest. Could be fun, I have done it - given the parts its a comfortable days work.

Catch can, hang it on your garden gate full of peanuts for the Robins[8|], surprisingly difficult to accommodate elegantly. Will affect oil consumption as crankcase vacuum varies. I'd suggest a temporary install, run it for 3000 miles, then hang it in the garden. (I removed mine - a red herring IMO)

One additional suggestion to your otherwise good list, include a boost guage, its a vital variable with MBC, and it needs to be right. You can install the chips and have everything right for say 1.2 bar, but if the diaphragm in the DPW changes condition, you could have 1.35 bar and not be fully aware.

Good luck

George
944T

Cheers George

I am considering selling on the MBC & going for a Apexi AVC-R BC instead, that should do the trick for what i need "I hope" []

Thanks lads for all advice in advance.

 

[Keyzy74]

The Apexi is the unit I used twice in two different cars. Prefered kit of choice fo me and complete quality. That's speaking from experience from my Jap cars.

 

[barks944]

I fitted an AVC-R to my 944, its totally wasted on the car with the standard injection system IMHO and offers very little if any benefit over a MBC. In fact it just adds an annoying clicking noise.

I have recently reverse engineered the 944 Turbos injection system (Bosch Motronic) and have re-designed it with some significant improvements. Just bench testing it at the moment with a custom built simulator. You can read a bit about it in the link in my sig. Theres lot of chat in there about how the 944 Turbos injection system works which might be interesting.

 

[944Turbo]

I disagree on the catch can - the breather pipe that runs under the manifold is notorious for being full of rubbish (scale / carbon / rust etc.) and it exits in front of the turbo inlet, rubbish from that pipe goes straight into the turbo inlet and if it is going to get sucked out it will be at high rpm. I hid mine behind the bumper in front of the passenger wheel and have a stopper in the batwing to remove the drainplug. All was well to a trackday when I had forgotten to empty it - the sightglass pipe blew out. The stuff it collects looks pretty grim!

My EBC (dual solenoid with tial) will allow a flat 18PSI to the redline but that was with a bigger turbo, I think with a standard one (even 250 26/8) will not quite allow it,
Tony

 

[edh]

Catch can is a pain to locate somewhere handy - sounds like you had a good spot Tony - interested to see a pic.

FWIW I never caught anything in mine - just a bit of slightly oily condensation

MBC, FPR, Chips & a Tial (maybe injectors) gets you 90% there for not much cash, after that it gets expensive. Plenty of other things to fix just to keep the car working properly.

 

[barks944]

ORIGINAL: 944Turbo

My EBC (dual solenoid with tial) will allow a flat 18PSI to the redline but that was with a bigger turbo, I think with a standard one (even 250 26/8) will not quite allow it,
Tony

A good MBC should work too, its probably the bigger turbo that allows the higher boost curve. A K26/8 just won't flow well enough to maintain 18PSI.

 

[Suffolk944]

ORIGINAL: Keyzy74

The Apexi is the unit I used twice in two different cars. Prefered kit of choice fo me and complete quality.

Likewise !

 

[barks944]

http://www.porscheclubgbforum.com/tm.asp?m=527402 - Heres a guide I wrote to fitting it on the 944. Feel free to add to it!

 

[peanut]

I can't be bothered to wade through yet another ' I want huge power for nothing£ ' thread . Its been covered extensively before.

As lowtimer has said you need to decide what you want to use the car for first.

.
Are you looking for maximum straightline acceleration and top speed away from the traffic lights or....
are you looking for speed combined with handling, for track day racing or
speed and handling over twisty A and B roads ?or
all of the above ?[]

You'll need an entirely different approach for each use .

No use having a fire breathing monster if it careers off the road at 50mph at the first bend because the suspension is too soft and the brakes inadequate

 

[944Turbo]

ORIGINAL: barks944

ORIGINAL: 944Turbo

My EBC (dual solenoid with tial) will allow a flat 18PSI to the redline but that was with a bigger turbo, I think with a standard one (even 250 26/8) will not quite allow it,
Tony

A good MBC should work too, its probably the bigger turbo that allows the higher boost curve. A K26/8 just won't flow well enough to maintain 18PSI.

closer to 16psi but never seen an MBC come close

 

[944Turbo]

this is the closest I remember an MBC getting

I also remember a long and complicated thread on rennlist about why an MBC cant do much better
Tony

 

[944Turbo]

ORIGINAL: edh

Catch can is a pain to locate somewhere handy - sounds like you had a good spot Tony - interested to see a pic.

FWIW I never caught anything in mine - just a bit of slightly oily condensation

MBC, FPR, Chips & a Tial (maybe injectors) gets you 90% there for not much cash, after that it gets expensive. Plenty of other things to fix just to keep the car working properly.

I did start writing a guide with pictures many years ago will see if I can dig it out, mine fills quite quickly but it is cool so probably causes more condensation and my engine is well run in (read knackered). Was yours plumbed back into the intake?

Tony

 

[GPF]

Before I re-did the intake on mine, I also put the catch can in the PU in front of the n/s/f wheel and routed it back through to connect back in to the inlet.

I also put some pipe on to the outlet and ran it down so it poked out of the bottom of the arch liner with a little tap to drain it.

It used to fill with dirty brown scummy water rather than just oil - probably due to condensation as it was in such a cold location - but it worked fine and was nicely out of the way.

 

[barks944]

Anyone got a pic of the heat shield for the AOS on a turbo 944? I can't seem to find mine!

 

[TTM]

ORIGINAL: barks944

Anyone got a pic of the heat shield for the AOS on a turbo 944? I can't seem to find mine!

There must be one or two pictures in the "Engine build progress" thread.

 

[GPF]

Hi Tom,

Do you mean this

[/IMG]

There are loads more in my photobucket (link in sig)

Regards

Graham

 

[edh]

ORIGINAL: 944Turbo

Was yours plumbed back into the intake?

Tony

Yes, although in a warm engine bay, so maybe this had something to do with it

 

[9212PT]

ORIGINAL: Eldavo

I used some flexi pipe of the same diameter as the AFM for mounting my induction kit behind the headlight and using the original cold air feed. I also changed to an enclosed filter.

I have a spare length of tubing I bought but then didn't need, if its any use you can have it for the tenner I paid for it. If you want to take a look at how I've set my induction kit up just let me know as I'm only round the corner.

Hi Eldavo

If you still have that spare "flexi pipe" i wouldn't mind given you tenner & taken a look at the setup ?

Cheers Paul

 

[9212PT]

Hi All

I have just spend the morning reading through this whole thread to refresh things for myself. []

But just want to clarify a few things so not to make any mistakes.

The stage i am at with regards to which parts are fitted & running are as listed below:

Bailey DV30
Jon Mitchell 9xx Induction kit
Lindsey boost enhancer
3.0 FPR
Promax chipset.


Parts still to fit:

Tial 38mm DPW
55lbs Injectors
Motorsport fuel pump
Oil catcher can
Manual boost controller ( Replacing with "Apexi AVC-R EBC )

Please can all advise on which are still safe to fit at current setup ??


Best regards Paul