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AnsweredHot!Stuka’s 1990 GT Turbo - Preparing for Targa Tasmania 2019

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B24
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2012/10/10 12:48:53 (permalink)
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It certainly gets it all out by 5k. With those revs, you could run the Winton or Wakefield 300km flat out with that!
Im happy to co drive if your keen to enter.
How many km to the tank when you push the car?
 

 
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stuka
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2012/10/10 19:09:19 (permalink)
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all is I know is what I can see as I bought the car only recently, there is a straight through exhaust with a hot dog on each pipe so I dont think its very restrictive. the previous owner was not very mechanically minded, the motor was rebuilt about 10,000 ago and he said there was some head work but he didnt know what exactly.
 
Steve I cant see me bringing the car over on the boat any time soon, you are welcome to a drive any time!
#17
stuka
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2012/10/13 20:27:07 (permalink)
+1 (1)
a friend of mine emailed this photo from the Hobart domain hill climb, bit of sideways action up the hill following a 90 degree turn in. when it started raining I held this slide right up the hill for 100 metres or so. these cars can be a lot of fun with moderate power
 

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stuka
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/05/28 19:46:53 (permalink)
+1 (1)
Done a few track days over the past few months and have had a lot of fun with the car. Ive been picking away at the excess crap to reduce a bit of weight, its quite addictive! So far I have removed about 90kg (25kg front, 40kg middle and 25kg rear), major items being the cat, power steering pump/accessories, abs and accessories, fitted bucket seats and removed interior trim, sound deadening etc.
 
I have changed the suspension considerably and brakes too and the car feels very neutral on the track. Changes are:
 - New front and rear ball joints
 - New front and rear Eibach lowering springs
 - Larger front swaybar and reinforcement plates
 - Pillow ball tension rods and mounts
 - 4 point front underbrace
 - Prothane bushing kit for front, rear and swaybars
 - Suspension geometry adjustment kit, RCAs etc
 - Late model brake booster and larger master cylinder
 - Gen 3 brake disc, calipers, slotted discs
 
I only have 2 deg camber up front so I’ll need to do something about that.
 
The plan next is for a W2A intercooler system similar to that in my other car. As Im going to remove the heating system, Im going to reuse and modify the heater lines to transfer water to and from the heat exchanger, these are around 16mm to 20mm in diameter, not ideal but probably enough. Makes a lot of sense though and will save a fair bit of hassle. I don’t think there is room for anything larger above the fuel tank and will be nice and discreet in that location. I’ll probably put a small 2litre tank in the frunk.
 
The heater lines will be modified to pass through the tunnel via bulkhead fittings, as Im planning to fasten the intercooler to the firewall behind the passenger seat and roll cage, with the air pipes passing through the firewall to the inlet manifold. This will keep the intercooler away from the heat and also free up space for a nice big air filter and box in the engine bay.
 
Im considering a small box in the system containing 1” copper with decent surface area so I can try some dry ice to reduce inlet temps even further. Will be easy to determine the before and after effectiveness of this as Im not sure if the water would be in contact with the ice for long enough to have a benefit. Its worth a go.
Im still toying with the idea of E85 and sticking with the steel wheeled ct26. I figured with all this I should have around 200 rwkw to play with. After that I’ll keep going hard until I have pushed the limits of the suspension, especially tyres before considering wider wheels, more power etc
 
 
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/05/28 20:02:56 (permalink)
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Sounds good Patrick, post pics up as you go.
 
I have also removed the power steering, did you keep the PS rack and just block or join the lines on the rack? What does it feel like to drive/race with?
 
My plans are also to put the WTA IC in the same spot, funny i was talking about this the other day, seems the thing to do, but i am still yet to see pics of anyone setups, so let us know how it works out if you do it. 
I cant fit it in between the cage and the firewall, (not that i would want to due to heat) i assume yours would be the same, so it would be in front of the cage, would like to see how a passenger seat will fit.
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/05/28 22:08:07 (permalink)
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Lots of like minded ideas in the last two posts haha.
 
If you still want a heater (albeit pretty crappy) just tap the two radiator lines. I am binning my pipes altogether, and the heater is not as important to me.
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/05/29 11:47:57 (permalink)
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I think the radiator lines should be enough for the water to air system. It's only cooling a small volume then running through 4 metres of coolant lines plus a heat exchanger and back again. The water to air intake lines are the same size as the heater lines so again, should not be an issue.
If you run the intercooler in the cabin, I suggest enclosing in a box with the air intake and air exit fitted (twin entry naca duct) to allow controlled airflow. The other option is to run a air feed from one of the ducts in the front bumper, through the cabin, into the box, then exit under the car or into the engine bay via a duct .
The heat from the unit( in the cabin) will be minimal as you are already ahead of the game with the engine in the rear of the car and not 4 inches from your leg like all front engined car's. You can always line the inside of the box with gold leaf which will 'all but' eliminate the heat produces.
I like the idea and may consider it for mine at some stage.
Nice work bud!
 

 
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#22
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/05/29 19:11:26 (permalink)
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Great minds think alike Brendan! I just left the auto rack in place, removed all the lines and blocked off. Someone told me the auto rack has less lock to lock than the manual. The steering feels quite good, I can feel the road better. The rack does need a rebuild though and I also have the quick steer pinion to fit, looking forward to that.
 
I have test fitted the IC and it fits behind the cage. My cage is a bit of a budget build. You could probably get a custom IC built to fit, the firewall tapers the higher you go so you could get something wedge shaped in there. Steve the diameter is highly dependant on the number and sharpness of bends, the more you have the greater the diameter you need to limit pressure loss in the system. I'll be keeping the air supply pipework pretty simple as this car will probably never be a fully fledged race car, it needs to be an all rounder for rally, targa etc.
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B24
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/06/01 00:12:08 (permalink)
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Will be interesting to see the finished result. Are you installing over the weekend?

 
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/06/01 11:03:36 (permalink)
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I'll make a start on it but I need to order all the fittings etc yet, pull the fuel tank out etc etc
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/06/01 13:03:42 (permalink)
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If you use the water fittings, you should not have to remove the tank. You should be able to attach the lines from either end without restriction.

 
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/06/01 16:06:48 (permalink)
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I intend to return the lines through the tunnel into the cabin, with a bulkhead fitting securing them to the tunnel so I'll need access in there. Anyways, I need to remove the tank to fit a new fuel pump so it will just make things easier.
 
I wired up all my gauges today, its my first wiring job and pleased with the result. Thanks for your advice Steve!
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/11/11 11:00:27 (permalink)
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Hey Pat,
I watched the in-car footage from Baskerville which one of the guys at the MR2 Nationals loaded onto youtube.
Its me giving the passenger ride. You can hear the knock of the suspension against the inner guard and the tyres not agreeing with the road but a great experience. Thanks again for the drive and look forward to playing musical chairs at MTC2014.
Also used  a stopwatch against the footage to check the times. 1.08.2/1.07.5/1.07.3/1.09(traffic)/1.06.7. I think the passenger was about 90kg if not a little more. So with a light fuel load and no passenger, with those work out tyres, you would see a low 1.05 without too much trouble. Certainly more time in learning the track to gain more time.
Also feel you could tighten up the chassis in the front (seam weld the strut towers, underbrace and strut tower brace which is located behind the front guard) as it would get a little 'slow' when you push the car. Its great right now, but can get better with these upgrades.
 
Look forward to seeing the times after the brake/suspension/tyre/weight reduction upgrade.  

 
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/11/11 11:07:24 (permalink)

 
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Re:Stuka’s 1990 GT Turbo Tarmac Rally Car 2013/11/11 20:14:44 (permalink)
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thanks Steve for the feedback. I'll need to update this thread. Ive fitted the JIC coilovers, lightweight wheels and new rubber so I'll be out on the track soon!
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