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 Hello from the UK

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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 22:05

1st - 5th gear pull

50 - 100 kph = 4 Seconds
100 - 150 kph = 5 Seconds

4th gear pull

50 - 100 kph = 6 Seconds
100 - 150 kph = 6 Seconds
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 22:17

Well by eye I can see you're quicker from your GPS reading

My figures

16-54 mph= 4 Seconds
54- 103 mph = 10 Seconds

Mikael GPS plot

16-54 mph = 2.5 Seconds
54- 103 mph = 6 Seconds

To be fair that is seriously impressive.
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Mikael
Skogencrew
Mikael

Antal inlägg : 15246
Age : 39
Namn : Mikael
Från : Gävle
Kör : Subaru Impreza WRX STi, Skidoo summit tjejskoter
Registration date : 06-10-11

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 22:36

Have som exact numbers here

Mine 2.9 rwd goes (unlightened)

50 - 100 kph = 3.6s
100 - 150 kph = 3.5s
100 - 200 = 9.9s
0 - 100 = 4.5s
0 - 200kph = 14.5

Kryckans 2.9 3d rwd goes (lightened)

50 - 100kph = 3.6s
100 - 150kph = 3.0s
100 - 200kph = 7.7s
0 - 100 5.6s
0 - 200 = 13.3s

But om certain that you would leave us behind with a pull on 4th gear at low speed Smile

_________________
“I live my life a quarter mile at a time. For those ten seconds or less I'm free nothing else matter”
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 22:53

Right looks like I need to do another datalog and try and get a 200kph reading. May try as you suggest lifting the rev limit some as I do have a tendancy to hit it rather often. I think the most accurate way I have for timings is still currently from datalogs. I'll added some fomula in excel I think to work out the figures for me. the Zeitronix samples at 67 times per second so I can find out the timing to atleast to one decimal.

Don't feel so bad now as those runs I made had peak boost of 9.7 psi, how much are you running again. Mine is very much even between my friend Twin Turbo running 1bar. I suspect you're running atleast 1.3bar or possibly something more!

I think a single turbo added onto the setup could work well.
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Mikael
Skogencrew
Mikael

Antal inlägg : 15246
Age : 39
Namn : Mikael
Från : Gävle
Kör : Subaru Impreza WRX STi, Skidoo summit tjejskoter
Registration date : 06-10-11

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 22:59

Peaks 15psi on both cars, haven´t done any test on higher boost

_________________
“I live my life a quarter mile at a time. For those ten seconds or less I'm free nothing else matter”
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 14 mar 2009, 23:05

even more impressive! kudos Smile
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 21 mar 2009, 14:39

Mikael, I'm looking further into the single Turbo route and for me will involve a few changes, mainly cam change, a custom dual I/C and rad setup (will cut out the front crossmember and fit a smaller bar in it's place), obviously manifold & exhaust changes.

However I'm curious as the spec of your GT40 as I'm thinking of either GT35 or GT40 (after seeing you success using it) with a large ish exhaust housing (possibly 0-8 to 1 ar). I'm working on a budget and looking for a decent turbo at a good price.

Regards

Rob
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Mikael
Skogencrew
Mikael

Antal inlägg : 15246
Age : 39
Namn : Mikael
Från : Gävle
Kör : Subaru Impreza WRX STi, Skidoo summit tjejskoter
Registration date : 06-10-11

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 21 mar 2009, 17:29

If i remeber correctly it has

Compressor

Inducer 56mm
Exducer 82mm

Turbine

Inducer 72mm
Exducer 62mm

A/R .099

_________________
“I live my life a quarter mile at a time. For those ten seconds or less I'm free nothing else matter”
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 21 mar 2009, 18:44

Fabulous, I will keep an eye out for a good deal. Out of interest is yours a roller bearing turbo?

I will be Taxing my Sierra at the end of the month so I'll take her out for a spin and get some datalogs (and blow out some cob webs) with a higher rev limit, I do think power tails off pretty quick though on mine above 6k.

You mentioned the reduced cam over lap is not so good, which is wierd as it's contrary to what I had from my literature. I've not got alot of experience with cam specs but I have similar over lap to standard cam spec. When I order my cam it had a mild duration with greater lift but had a narrower lobe angle and this would have been 111 degrees and I've had this increased to 114 degrees. I found it hard to dial the timing in with this, I think I may look at making an adjustable sprocket, is this something you have done?
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Mikael
Skogencrew
Mikael

Antal inlägg : 15246
Age : 39
Namn : Mikael
Från : Gävle
Kör : Subaru Impreza WRX STi, Skidoo summit tjejskoter
Registration date : 06-10-11

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimelör 21 mar 2009, 19:03

Roller bearing is nice but very expensive and not so forgiving with sudden engine stops and so on. A truck turbo is build to withstand very high boost (over 30psi) and can take much damage before it breakes.

The problem with small turbos with very high exhaust pressuare it´s needed to have reducet lob separation so that the exhaust gases don´t get pressed back into the cylinder
On a supercharged engine or a engine with big turbo it´s no problem with high exhaust pressuare so there you can have normal aspirated camshafts to increase horsepower

Normaly would the experts recommend a small turbo to have more power att low revs, but here in sweden we have seen great horsepower with a normal aspirated engine with lower compression and a big turbo.

It´s always a compromise, but i am more into a lot of horsepower rather than early boost, or do as you are thinking, supercharger and turbo.

Look at this swedish Opel (vauxhal) manta with a supercharged/turboed volvo engine

http://www.garaget.org/video/bs01rgolgsd1

_________________
“I live my life a quarter mile at a time. For those ten seconds or less I'm free nothing else matter”
Till överst på sidan Gå ner
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimesön 22 mar 2009, 10:28

The Manta sounds awesome........ ! I need a toothed belt Hello from the UK - Sida 2 Av-26

So is your GT40 sourced from a a truck then? bearing in mind I dont know a huge amount about turbo's, but I was under the impression that diesel turbo's arent good for petrol engines due to the lower EGT's produced by a diesel and have a different turbine blade angle to aid spool up, which render them unsuitable for petrol's.

I am considering a very similar setup to yours with the crossover pipe coming round the front of the engine, however I will be close to the supercharger charge pipe work which may need further fettling to gain clearence, but this not a big deal.

The biggest problem I think I may encounter is the steering shaft on this side (side of the PAS pump). I'm not 100% sure but I think the 4x4 crossmember also take more space. Does your crossover pipe connect to thte turbo manifold from behind the crossmember? as I have diff here. RWD is starting to feel more appealing.

What size pipe did you use for your manifolds and also the crossover?

Rob
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Mikael
Skogencrew
Mikael

Antal inlägg : 15246
Age : 39
Namn : Mikael
Från : Gävle
Kör : Subaru Impreza WRX STi, Skidoo summit tjejskoter
Registration date : 06-10-11

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimesön 22 mar 2009, 11:05

Yes its from a truck. No problem with a truck turbo, it´s the racing turbo salesmen who promote special racing turbo, they want to sell of course Smile

On a 4x4 it´s really tricky to draw the exhaust pipes, but i have done it, problem i see is that your car i right wheel steered.

I use 42mm on the cylinder pipes, and 48mm after the collector to the turbo. I measure the pipes on the outside (standard measurements)

_________________
“I live my life a quarter mile at a time. For those ten seconds or less I'm free nothing else matter”
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Super12v
Skogenracing Small
Super12v

Antal inlägg : 23
Age : 40
Namn : Rob T.
Från : United Kingdom
Kör : 2.9 XR4x4
Registration date : 09-03-13

Hello from the UK - Sida 2 Empty
InläggRubrik: Sv: Hello from the UK   Hello from the UK - Sida 2 Icon_minitimemån 07 sep 2009, 15:06

Hi Mikael,

I've not made any progress with sourcing a suitable turbo, however I'm also looking at changing my setup to include a charger cooler as it will free up some necessary space (and shorten the distance between the valve and throttle).

I can't see this project happening very soon, but I'm trying to gather the parts on the cheap for a winter project (probably not this year).

I remember you asking for some external video's of my car, well I have some..


https://www.youtube.com/watch?v=b-zxbwmCphM

Rob
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