Tuning turbo time!

[craigb244]

modified my rear ARB to stop it rubbing my shocks. also fitted the new shocks and springs.

Got a brand new turbo for the 16valve engine.
I found it on ebay local. the guy said its from a rover but unknown car.
it is a GT15 and for £50 couldnt complain.

After i picked it up I noticed something strange.
The waste gate has been changed and WG mount milled off and a new one welded on.
the waste gate port is machined out. the turbine is strange and large!

then I noticed the compressor and turbine housing both have numbers hand ground into them so i took it apart to get a better look and found the compressor is also larger then normal and the back plate is machined from billet and had the same numbers as ground outside written in permanent marker inside.
looks like a serious hybrid!
ill get pics up later

cant find any details on these numbers online. turbo looks like it could be good but have no idea what its from. dont want to machine and weld flanges onto the turbo manifold because if I ever need to replace the turbo id be stuck not knowing what its from.

 

[craigb244]

back to work on the engine.

finished torqeing up the engine

welded oil return into the sump (altho i might be getting a alloy sump from todger which will be much better for me)

mounted the turbo in the position I need it in and going to make a "jig" to represent the slam panel/radiator then its manifold time!... going to be a nightmare.

hopefully while im doing it ill be able to find details on my new turbo.

ive attached photos of the turbine. it is a monster compared to the GT15 jobby BUT there is lots of fins and the gap between them is very tight. also the inlet to the turbine is only a bit bigger then my hybrid.... what do you lot think??????

not sure if i should take the risk and use it or look for something else.

 

[woj]

Craig mate, aren't you a little bit too optimistic about fitting all this without having to do some major shifting of the stuff in front? And cutting? This turbo seems to be huge I mean in terms of physical size...

 

[craigb244]

lol yes the pipe work will need a major overhaul, but until I fit everything I wont know what needs doing. I want to make some large changes while im there... the radiator is going onto the other side (in front of the gear box where it is MUCH cooler)

The intercooler is going on drivers side unless i can sort out the charge cooler, in which case another cinq radiator is been fitted in the standard location.


I dont expect it to be simple...

the turbo is physically a little larger then the standard gt15 turbo. MUCH smaller then the saab turbo jason used which makes my turbo look like a baby. I think it just looks large in the photo

 

[craigb244]

thought id add the details i found on my turbo in case anyone can help.

Its a garrett turbo but the original tag looks like its been removed and replaced with a hand stamped on (its a proper garrett tag)

The tag says:
cust p/n: C10850T42
GAG P/N: 71T10872T

Model# is not filled in.


compressor housing:
a/r 42
Hand marked: af 2662

Inside the back plate (removed the housing) has written in permanent marker
of669 (could be 9 or g)
2662 (as scribed into the housing)


turbine housing
a/r 42
42-12 (looks like that... hard to tell)

 

[allanhelen]

Just fit the Turbo

what is the worst that can happen? it's not like you've never fitted an engine or tuned a squirt before is it

 

[craigb244]

true. more worried incase the turbo ever goes...

 

[Munkul]

its not like you're incapable of retrofitting another turbo once again

Is it a T2 flange? Looks like a smart sort of hybrid anyways. Get it used, otherwise I'll buy it off ya!

 

[craigb244]

its not like you're incapable of retrofitting another turbo once again

Is it a T2 flange? Looks like a smart sort of hybrid anyways. Get it used, otherwise I'll buy it off ya!

true i guess with a tube manifold its just a matter of cutting the old flanges off and welding new ones (or even adapters if they are close)

its not a T2 flang its a 3bolt flange.
the exit is also 3bolt but the turbine is deep inside and the waste gate rather large and on the side(ish)

defiantly a nice little hybrid... imagine it would of cost someone a small fortune to have built!

 

[fingers99]

Just bang it on and hope for the best: of all the things that could go wrong, the turbo is the least likely to!

 

[craigb244]

Just bang it on and hope for the best: of all the things that could go wrong, the turbo is the least likely to!

lol true

 

[Brooky]

Tart

Is it just the vid or are some led's really bright?

 

[craigb244]

lol. camera really but the end ones are over 1.5bar so they are bright for a reason.

the yellow leds across the bottom are vacume

 

[Munkul]

thats cool. How are you controlling that?

 

[craigb244]

I bought a cheap chavy 40led boost gauge. I hoped I could copy the circuit to make a few but the chip (actually a pc bios control chip! ) is copy protected! !

managed to future out the pin out and bought 500mixed colour leds from china. soldered 41leds with ultra fine varnished wire from an old transformer.

leds where well bright so a bit of tweeking and some paint fixed it...

here's the finished dash

 

[woj]

Well Craig, now you have done it, damn the whole turbo conversion, 1.2, 1.4, 8V, 16V, whatever, this is THE coolest Cinq mod I have seen so far. Seriously. I want the schamatics for this, anything that will let me reproduce this, if you will

 

[craigb244]

haha glad you like it.

I can tell you how it works but other then that its up to you.

need a pic with at least 13 outputs 3 transistors and a map sensor.

10 outputs are connected to 4 leds on each pin

then bunches of 10 leds are connected to the transistors (the first 10 are constantly fed)

the pic switches quickly between the bunches of 10leds (via the transistors) while powering the single leds from the 10 pins.

might sound complicated but to me seems a very clever way to control 40 individual leds from only a few outputs.

 

[Asteris]

There is a much simpler way to do this and its called LM3914. It's a dot/bar led driver. It get's a signal between 0-5V and lights the according leds. You can also wire more LM3914 in line with each other and get 20-30-40 led bars.

http://www.national.com/mpf/LM/LM3914.html#Overview

 

[craigb244]

asteris, the lm3914 seems good... but i looked into it before buying a cheap gauge to butcher... problem with them is that you need a very stable 0-5volt (even more so when you chain together a few of them)

the problem is that them chips react instantly to the input. the gauge would be VERY erratic due to it reacting instantly to pressure fluctuations. you would need additional conditioning circuits to average out the pressure sensor. (this is the reason megasquirt has a option of reading the map sensor at a set crank angle and lots of software smoothing)

 

[craigb244]

wehey! ordered my manifold pipework just gotta pick it up.

1" Sch 10 316/L (low carbon so wont become brittle with heat)

ordered
12 long radius 90s
4 short radius 90s
4 long 45s
1 meter of seamless pipe

all for under £60.
I bet I wont use everything.

just going to see a mate tomorrow about some stainless to make flanges from and a bit of 2-3mm sheet to make the collector.

then need to pick up some argon and an extra regulator to back purge the pipe