Twin turbo UZ ST185

[ed_ma61]

'twas oncall

was planning on coming until i found the 'new roster' bah... wasnt that busy either for a change, but still need to be onsite till 2230. right where i am now too... waiting for a theatre slot to open up... dammit! one of the other surgical teams is holding court at present. i hate after hours access...might go get a kebab...

dont care about a 1/4 time, but do want to see the trap speed, and also calculate a 0-100 time

 

[spf_lexus]

that other celica never saw those turbos coming... thought he'd nose ahead but you can clearly see them fully spool up and.....LATER!!!! Sweet vids..

 

[JustenGT8]

That other 'celica' was the Oz equiv of a US muscle car...a silver Holden Commodore (with worked LS1) The black car was a Nissan Silvia i think?


That's not spool you see either as i have full boost pretty much off the line....that's actually the car finally getting some traction

 

[mshawari1]

You smoke both of them …….. hehehe​

 

[stevechumo]

A coupla vids of my latest trip to the drags

http://www.youtube.com/watch?v=fh6glaHJ_JY

http://www.youtube.com/watch?v=Tn5l9yomXiE&feature=related

Times aren't anything special with a 12.1 and 12.4...traction was woeful on the Nexens. Trap speed was up though to 125mph so the new manifold has definitely provided so decent gains

It might be not very special to you, but it's very quick to most of us. :13: Congrats again!!! I'd love to see you break into 10 thermal barrier...LOL.

I've read several reviews on the Nexens tires and most of they say good about these tires. I almost bought them but eventually went for the General, which is also very good.

 

[JustenGT8]

Thanks Steve, the 10 is there with the right rubber for sure....and of course some rear CVs strong enough to take the launch

Nexens aren't a bad tyre....for spirited street use i would say they are pretty good. Stiff sidewalls make for a terrible drag tyre though, i ended up with only 17psi and was just starting to get some 'launch' out of them after a big 2nd gear burnout. The Nankangs by comparison are pretty average but have nice soft sidewalls for drag and for some reason the compound works well on a prepped drag strip?

Anyways,, aiming to get back to the drags after some circuit track days in August which should give me enough time to get the Supra CVs in there

 

[JustenGT8]

You smoke both of them …….. hehehe​

The only race i lost was my 1st of the night with the track very 'fresh', i had virtually no traction at all.......wheel spin until half track and then ran the guy down top end. There was an oil down 2nd car of the night and even though they cleaned it well i still stepped out sideways at around 140kph at that point of the track I ran a horrible flat 14 that run but at 118mph

 

[JustenGT8]

No updates foir a while ,so ,som,e ,pics of the new rollcage. Still needs paint and the rest of interior needs som,e tidy up but you get the idea:





and while i'm on a circuit theme i also acquired this to keep the grunter engine safe once it's built:

 

[JustenGT8]

and to continue the race theme:

 

[Fasteddie]

Justen,

what's the rev-limit on your setup ?...and after what rpm are you losing power because of the stock cams/stock valve springs ?
Thx !

 

[JustenGT8]

With the competely stock setup there's little point taking it past 6000rpm but it's because of the long stock intake runners rather than cams/valve springs.

RMS ran a stock setup out to 7000rpm for 300hp with no mods bar a revised intake manifold (slide throttles) and exhaust.

For sure cams are very very mild but i'm still reluctant to lose any of the awesome bottom end my setup has......that may change with the 'built' engine as a few possible way i may go and they all seem to involve a cam upgrade

Valve springs are also pretty soft and the last coupla times i've been on the dyno i have a suspicion that i am seeing some valve float at high boost/rpm. It's only very mild but giving the age of the engine and the flogging it's copped i wouldn't be suprised

having made 400rwkw on a completely stock setup i can say that you don't 'need' to touch a thing If you want to optimize your setup though i would start with the intake manifold. If the engine is already apart then a mild cam upgrade with match springs too for sure...plus head studs and better HG.

 

[Fasteddie]

Justen,

member "turbo4l" seems to be able to go until 7500 rpm (500rwhp):
http://nl.youtube.com/watch?v=5HZcK0j25sg

In the text:
"363 kw at the wheels. Boost set at 14 psi. Was only going to run 7psi to start with, but in the words ofthe workshop "Yeah, but she seemed to like it". At any higher boost than 14 psi, the motor doesn't make the power gains per psi to warrant trying to jam any more boost into it, mainly due to the duration and lift of the cams. She seems to be happy to cop this boost all day. 7500rpm rev limit."...
...he only refers to the cams and is seeing gains until 7500 rpm...

Any opinion on that ?
Thx !

 

[JustenGT8]

He has a modded inlet though right?

 

[Fasteddie]

Yes i think you are right...a special "Hypertune" inlet....
....lateron he blew a headgasket and is now rebuilding...
So another proof that the inlet is very restrictive....
Thx !

Q: what ignition are you using....?

 

[JustenGT8]

LOL sure as hell doesn't look like a stock inlet manifold to me It's twin plenum, short runner mate!!

 

[JustenGT8]

Some footage from my last track day

just a single lap as loading takes forever

http://au.youtube.com/watch?v=bJal39Omgks

 

[JustenGT8]

Just some more track footage to enjoy...well i did

http://s173.photobucket.com/albums/w74/celicagt8/?action=view&current=passingfezzacompressed00.flv

 

[JustenGT8]

a flyby on the main straight

http://s173.photobucket.com/albums/w74/celicagt8/?action=view&current=straightflyby.flv

 

[spf_lexus]

Nice vids.... I personally like the aesthetic of your celica flying by that 911.... Toyoooooota!! lol Keep it up, we love seeing toyota spankings, good stuff.

 

[-Nemesis-]

Hey Justin, just wondering about your 'stock' engine, is it still the original head gaskets? Or do you have new stock ones?

Looks like by a turn of luck I might be soon getting a full standalone system, then i'll be able to unlock some more boost. It's a 16yo stock engine though, unopened apart from a LHS shim job.