I have just bought a 944T

[John Sims]

Oily,

Do you play air guitar whilst thinking these things up then?

Very OT

No. It can't be done. I can barely manage to play without trying to do something else at the same time. []

Paul

still not holding the 1.1 bar in the higher revs

I thought the fueling on the Guru kit was only calibrated to 1.0 Bar. Does this mean I've got another .1 to go? [] (Sounds like something off Spinal Tap )

 

[oilyrag]

Oh look, an air guitar band !

Had trouble with the old waste gate over Christmas..........never thought of shimming it tho, have to give this some (very) careful consideration.
It's new techniques like this that really make the forum useful, especially for some of us older ones, thanks chaps. [8D]

Hey Simo.......you up yet, bit behind with the old replies of late.
Happy New Year to Team Hockley & all you technofobes out in Turbot land. []

 

[oilyrag]

Oh.......see you are up after all! Sorry for the delay ......had to attend to something slightly more dangerous than a stuck waste gate & when I transmitted, there you were! []
Oh no there it goes again......have to get on with the job in hand if you lads want some good lube & bitumen; see you at next meet.
T

 

[Guest]

ORIGINAL:

(he's not a club mener so can;t get on here).

Neither am I, but i'm here []

Get you mate to sign up Fen, he should be able to access the forums at least !

 

[Fen]

I thought you had to have a membership number that tallies with your surname to get access?

 

[Diver944]

No Fen anyone can get in here if they register. It's only the chat room section that needs a membership number to be verified.

I'm looking up those WG instructions now

correction: I think I'll start a seperate thread all about my personal WG fun with pics and instructions

 

[Diver944]

ORIGINAL: slim_boy_fat
Paul do you have an RR graph i can have a look at?

Here is a pic of the RR graph. This was taken with the Guru kit and a 3mm WG shim installed and set to 15psi (1bar). I later discovered that the 3mm shim was not enough and the WG was starting to open at only 6psi (0.4bar) so I was still losing a lot of boost straight down the exhaust. I now have 9mm of shim in there [8D]

 

[Diver944]

ORIGINAL: John Sims
I thought the fueling on the Guru kit was only calibrated to 1.0 Bar

John,

The Guru chips are fueled for 15psi (1.04bar) and I was running slighly rich according to the Dyno operator. I contacted Danno and he advised turning up to 16psi (1.1bar) to balance it out. This is where the cheapness of 'one chip fits all' is slighly inaccurate compared to a custom rolling road setup that costs £££££

I shan't be using the car in full WOT trackday action until I've gone back to the RollingRoad to check that I am not now too lean at 16psi

 

[Fen]

Mine ran 1.01bar so I should dig out my plot to look at it but from memory it made peak torque at 3,200 or something (but only 415Nm which is about 310lb/ft IIRC, so I'm not happy with that) and rising power to 280bhp @ 4,500 rpm then it drops because the wheels started to spin on the rollers.

For reference here is the one from the owners handbook:

 

[Guest]

Thanks Paul, i must say i am surprised the graph actually looks like the chip has pushed the torque curve slightly higer up the rev range. Especially at the bottom end, and it was here that i thought it would have shown slightly better numbers. The peak figs are fantastic. But the peak torque seems on a very very narrow band, standard the car produces 250ish lbft between 3800 & 4700 rpm.

p.s. i assume thats straight dyno power NOT at the wheels?

 

[Diver944]

I think that is the difficulty with comparing graphs that are on different scales with one using metric the other imperial units [&:]. The Porsche graph starts at 1000rpm whereas mine starts from zero.

Looking at my paper copy which is more legible than the one I posted I can see that at 3800 the Guru chips yield 316 lbft and at 4700 they are at 308 lbft

It now makes 250 lbft all the way from 3200 to 5900, well actually it may be better than that as my wastegate now stays shut up to 5,500 rpm [] whereas in the graph it was opening at 4000 rpm []

 

[Guest]

Look forward to seeing what your car does now with the wastgate set properly.

I assume the engine is well strong enough for the upgrades? I dont really want to take any chances, but i have heard that they are possibly abit under tuned by porsche.

 

[Robbiemeister]

ORIGINAL: Fen

370 is pretty impressive. Mine made about 315lb/ft before I broke it.

Sorry for the delay in replying, have been away for the new year.

I don't know exactly what has been done to the car as the work was commissioned by the previous owner.

There is a fairly heft bill from AmD which includes chipping, a rebuilt wastegate, new dump valve and rebuilt turbo. I suspect they may have done something to the turbo as the cost for the rebuild was £300 higher than they normally quote.

The previous owner produced a website for the car complete with the graphs, have a look if you want:

http://www.davidsims.ukgateway.net/944t/chips.htm

I think the secret to the power and torque figures is that they tweak the car on the RR rather than any trick bits.

 

[Fen]

Oh, I didn't even know David Sims had sold his car.

 

[Robbiemeister]

ORIGINAL: Fen

Oh, I didn't even know David Sims had sold his car.

It's been mine since Dec. 2002[]

 

[Fen]

I've been subscribed to Titanic for years but sometimes I just don;t have time to read the mail so I guess I might have missed it, assuming it was discussed there.

I'll have another look at the website now.