JAS's Rebuild and twincam conversion. 302kw atw baby!!!

Display your ride and post power figures, dyno runs, drag and circuit times.
fugazi
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Post by fugazi »

thrash wrote:is that an oxy sensor on it?
Naah, most likeley a EGT...
Oxy should be on the secundary side of the turbine.

Look's good JAS!
Powergoal's?
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JAS
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Post by JAS »

OLD FART wrote:You may need a heatsheild between no 1 runner and the compressor outlet as they seem very close in the pic
Yeah there is around a 10mm gap between the runner and compresser cover. But I will be heat wrapping the manifold. Or if I can find someone in Christchurch that does HPC I may look into that. Not really sure what's better tho.


fugazi wrote:
thrash wrote:is that an oxy sensor on it?
Naah, most likeley a EGT...
Oxy should be on the secundary side of the turbine.

Look's good JAS!
Powergoal's?
10 points fugazi!! Ive had a Greddy EGT gauage for ages so figured now would be a good time to fit the sender to the manifold.

Id like close to 400hp at the wheels. But still have the standard cams so Im thinking I might end up with around the 380 mark. Thats on a hub dyno.
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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JAS
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Post by JAS »

Took some night shots the other day. But they didnt turn out as good as Id hoped. So I had a play with them in photo shop :)


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1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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Komeuppance
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Post by Komeuppance »

JAS wrote: Oh and I uploaded a new vid to youtube.


Make sure you have the sound up!
Blow off next right in an open window... nice... haha.

-Robert
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Now: Australian Compatible!
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JAS
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Post by JAS »

Just a quick update.

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Modified the factory heat shield. Painted and heat wrapped the manifold.

Ive got the turbo and everything bolted up now and will get pics up soon.

It drives soooo much better. :D
Its booked in for a dyno tune on the 28th of Feb, so will be interesting to see the difference :D
Might see if I can find some good injectors for it before then as Ive still got the EVO 6 560cc ones.
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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Krorz
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Post by Krorz »

JAS wrote:Just a quick update.

http://i834.photobucket.com/albums/zz27 ... CT0001.jpg

http://i834.photobucket.com/albums/zz27 ... CT0002.jpg

Modified the factory heat shield. Painted and heat wrapped the manifold.

Ive got the turbo and everything bolted up now and will get pics up soon.

It drives soooo much better. :D
Its booked in for a dyno tune on the 28th of Feb, so will be interesting to see the difference :D
Might see if I can find some good injectors for it before then as Ive still got the EVO 6 560cc ones.
Good job as always. BTW your car's engine bay is the background picture on the Hungarian Starionclub site :)
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JAS
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Post by JAS »

Krorz wrote: Good job as always. BTW your car's engine bay is the background picture on the Hungarian Starionclub site :)
Hahahahaha awesome :)
Have you got the link to the site? Ive got to see it!
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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Krorz
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Post by Krorz »

JAS wrote:
Krorz wrote: Good job as always. BTW your car's engine bay is the background picture on the Hungarian Starionclub site :)
Hahahahaha awesome :)
Have you got the link to the site? Ive got to see it!
The site is WIP at the moment and as much as I like your car's engine bay it's not the best as a background picture, but hey :). http://starionfanklub.gportal.hu
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JAS
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Post by JAS »

I see what you mean. They could have centred the pic a bit better. Its an old pic too
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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JAS
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Post by JAS »

347hp atw.
Not as much as I was hopping for. And slow to come on boost too.

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1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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Sargeant_Khan
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Post by Sargeant_Khan »

Well done Jas, What size injectors did you end up using?
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JAS
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Post by JAS »

750cc
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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kiwieurospec
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Post by kiwieurospec »

Jesus how much were you hoping for?
1985 Widebody Factory Four Wheel Steering
1986 Euro Spec-ABS,LSD etc
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JAS
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Post by JAS »

I was hoping for between 380 and 400hp atw Thats where it should be at with the mods
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi

http://www.facebook.com/marvinmartiannz

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dirtygalant
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Post by dirtygalant »

yeah that boost build up curve is not the best.. it almost looks like it's building up and as soon as it builds decent boost the wastegate keeps it steady at 21psi, I would try raising that up to 25psi and see how much power you get - my thoughts are that the turbo is perhaps a bit too big for your relatively low boost and mid-range power orientated application.

Other things I would be looking at is perhaps ignition timing, camshaft timing and that the camshaft duration is ideal for your application. Out of curiousity, have you done a compression test on the engine recently? if so what are the numbers?
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