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Old 11th December 2011, 10:37 PM   #1 (permalink)
R.I.P.S NZ is down to 7.48 @ 189mph with MGAWOT III
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7.2 second turbo for sale :-) VIDEO's

We went to the first round of the NZDRA championship over the weekend.

We changed the car to comply with the correct weight break and went up a class to CC/D where the NZ record is 7.792 @ 171.75mph, the track was pretty green and we knew there were bad bumps so we detuned the motor as far as we could (15psi) for the first 3-4 seconds then gave it a bit more after that to see how she'd go, we didn't want to go running quicker than the record just yet and we needed to feel out the track.

The timing gear wasn't working so we didn't get a slip but the first run felt like around 8.0 @ 165.

Gave it just a little more from 1/2 track and went out again, here's the result a 7.95 @ 169mph, keep in mind this is a walking pace compared to what its like on a low 7 second run but it'll give you an idea of what I see:

RIPS FED at NZDRA Summer Nationals Taupo 11 Dec 2011 - YouTube

We were happy with the first run but wanted to try and run right on the NZ record so we knew the exact tune we need to get it.
To lose over 1/2 a second off the ET the car usually runs but still have a reasonable mph is not that easy but with a few changes Jason nailed the boost curve spot on for the next run, a 7.80 @ 171.76, 8/1000ths of a second slower than the ET record and 1/100th of a mph faster than the mph record, can't get much closer than that!!

Here's the run, check out the bumps about 75 meters out!!:
RIPS FED second practise run NZDRA summer Nationals 11 Dec 2011 - YouTube

So we had the tune nailed but unfortunatly the turbo decided to give up at the end of that run, it jammed up solid and now that its stripped we found out why, parts of the turbine wheel had come off and jammed the rest of it against the turbine housing.





The turbo has done around 5 years of hard work though, we all knew it was just a matter of time before it blew and we'd even talked about changing the turbo to a GTX45 or a GT47 over the xmas break well it looks like we WILL be changing it over the xmas break now, hahaha.

Anyone know how to get hold of Conrad Bradley for a warranty claim?

I havn't had the results from the meeting yet so I don't know how I'll be sitting points wise but thems the breaks,

Robbie.
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Old 11th December 2011, 10:46 PM   #2 (permalink)
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Worse bit is it looks hard to get to in the engine bay.....
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Old 11th December 2011, 10:49 PM   #3 (permalink)
R.I.P.S NZ is down to 7.48 @ 189mph with MGAWOT III
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Worse bit is it looks hard to get to in the engine bay.....
Yeah its a real prick to get to I tell ya worst part was moving the intercooler forward, 5 minutes in total and she's off.
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Old 12th December 2011, 05:08 AM   #4 (permalink)
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would make for a choice Christmas present for someone
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Old 12th December 2011, 08:18 AM   #5 (permalink)
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Isn't that due to either extreem exhaust gas temp or undefined material gone through the exahaust housing e.g. bits of the valve guides?
Atleast thats what i have thought when my turbos have looked like that. And when i took my engine apart 5 of 6 valve guides were missing pieces....

Now go put on something out of the catalog that the guys that are running REALY fast are running with.
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Old 12th December 2011, 02:25 PM   #6 (permalink)
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5 years on the same turbo, i dont think theres anything to complain about

I think it blew because of bad karma! when turning down boost

Ron

Nice speed bumps
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Old 12th December 2011, 06:05 PM   #7 (permalink)
R.I.P.S NZ is down to 7.48 @ 189mph with MGAWOT III
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Isn't that due to either extreem exhaust gas temp or undefined material gone through the exahaust housing e.g. bits of the valve guides?
Atleast thats what i have thought when my turbos have looked like that. And when i took my engine apart 5 of 6 valve guides were missing pieces....
Its actually been like that for a long time and we've never had a valve guide failier or parts go out through the turbo, I'm sure it was like this even before we started using Co2 too so we arn't sure what started it but we didn't worry about replacing it because we had plenty of power and the big chips out of the compressor (from stones) matched the back just fine hahahaha, we knew this day was comming at some point.

This time a small part of the turbine or the heat sheid got jammed in the turbine housing and once the turbo stopped it was jammed.


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Now go put on something out of the catalog that the guys that are running REALY fast are running with.
I have an out of the box old school GT47 here, pretty sure we are going to use that for now because power/response is not an issue, we need to spend our efforts on finding grip so we can wind her up.

Rob
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Old 12th December 2011, 07:42 PM   #8 (permalink)
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Ok.
I was first going to run the same setup thats why i was trying to find out what caused this. And the only thing it realy can be are either some pieces kill it or exhaust gases melts the turbine. So the solution for me is bigger
This was a gt45 you ran no? So then you apply the same solution then?

Yeah that fiddling around with the power to find the grip thing must be realy annoying?
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Old 12th December 2011, 10:32 PM   #9 (permalink)
GT-R Glenn is aware Veilsides street R32 gtr ran 8.612 @ 172.5 MPH (Radials)
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I cant see anything wrong with it
Can't you just angle grinder the edges off and chuck it back together ?
Oh, It might need a re balance too
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Old 12th December 2011, 10:47 PM   #10 (permalink)
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I cant see anything wrong with it
Can't you just angle grinder the edges off and chuck it back together ?
Oh, It might need a re balance too
Send it to Adam so he can get the angle grinder and re grind it while he is grinding his crankshaft.
He might even hard chrome it too.
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Old 13th December 2011, 11:04 PM   #11 (permalink)
R.I.P.S NZ is down to 7.48 @ 189mph with MGAWOT III
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Who's Adam and more to the point, who's that cheesey looking prick on the left in the second picture?
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Old 13th December 2011, 11:37 PM   #12 (permalink)
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Who's Adam and more to the point, who's that cheesey looking prick on the left in the second picture?
Our south African mate. He's saying crank journals are hard chromed now.....

That fulla on the left looks like a good prick
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