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Modded VTGs - Who is Experiencing Great Results

Old Sep 27, 2010 | 04:32 AM
  #16  
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Originally Posted by WhiteKnight
I have tested my car with 91 octane (equals to ~95 octane Euro fuel), it really changes things.

Off the shelf 93 octane tunes won't work with that octane level, ECU retards timing too much.

997tt loves high octane, thanks to its 9.4:1 compression engine
We got off the shelf tune on the car which ran 5's on 93 octane

I agree that custom tune would be way to go if u want best results
 
Old Sep 27, 2010 | 04:56 AM
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How can octane levels be different in the US or Europe?

99 RON is readily available in the UK, isn't that 93 Octane US?
 
Old Sep 27, 2010 | 05:36 AM
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Originally Posted by TTdude
Yeah, but that would require shifting...
I still need some help with that...
 
Old Sep 27, 2010 | 05:55 AM
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Originally Posted by farris
How can octane levels be different in the US or Europe?

99 RON is readily available in the UK, isn't that 93 Octane US?
Yes 98/99 Euro = 93 octane U.S
 
Old Sep 27, 2010 | 06:53 AM
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I have had modded vgts in the past if money is not an issue just go rite 2 the gt 30s u will be happier in the long run
 
Old Sep 27, 2010 | 08:11 AM
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Originally Posted by Shotcaller
We got off the shelf tune on the car which ran 5's on 93 octane

I agree that custom tune would be way to go if u want best results
I meant that off the shelf 93 octane tunes will not work with 91 octane.

I have lost about 1 second during 100-200km/h acceleration with modded VTG package.

93 octane US fuel= 5.8sec
91 octane US fuel= 6.8sec

and even much slower acceleration after 200km.

Custom tunes for local fuels would get best results.
 
Old Sep 27, 2010 | 10:10 AM
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Originally Posted by farris
Hi Guys,


What are the main modifications done to the stock VTGs to get the best results?


I know of:
1- bigger billet compressor wheel
2- clip turbine
3- extrude housing
4- Anything Else?

I am trying to establish know how much can be squeezed out of the following setup on Pump Gas without crazy boost and with the stock tranny.


I am looking to do the following:
- Protomotive Modded VTGs
- 5" Intercooler
- Protomotive 2.75" X-Pipe Catless Exhaust
- Protomotive Tune
- Intake - BMC Panel Replacement Filter
- TCU Upgrade
- Boost Recirculatoin Valves

Who all have similar mods and what numbers are you doing?

Please list:
- mods
- whp
- wtq

- 1/4 mile
- 60 - 130
- 200 to 300

I know there are some great cars out there with Modded VTGs like Milou's and 997John's!

Come on guys post your cars and info
Farris,

i was waiting for the heat to drop a bit, do some runs and post them. Now the weather is like 26 degrees Celsius so i'll try tonight and post them here. I'll send them for verification this time, i should be withing the fastest convertibles
 
Old Sep 27, 2010 | 10:14 AM
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good luck
 
Old Sep 27, 2010 | 11:47 AM
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Originally Posted by milou
Farris,

i was waiting for the heat to drop a bit, do some runs and post them. Now the weather is like 26 degrees Celsius so i'll try tonight and post them here. I'll send them for verification this time, i should be withing the fastest convertibles
Good luck man!!!!
 
Old Sep 27, 2010 | 12:18 PM
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Originally Posted by edelectra
I have had modded vgts in the past if money is not an issue just go rite 2 the gt 30s u will be happier in the long run
we will see soon enough: Champion Motorsport 68mm Billet Turbo Chargers for 997.1
 
Old Sep 27, 2010 | 12:42 PM
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John

When you expecting your car back.

Waiting on your results before I make the next move.
 
Old Sep 27, 2010 | 12:44 PM
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going in on monday
 
Old Sep 27, 2010 | 01:20 PM
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Originally Posted by Arone997tt
going in on monday
John,
Are you getting your turbos installed today or next Monday?
 
Old Sep 27, 2010 | 01:27 PM
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next monday
 
Old Sep 27, 2010 | 01:37 PM
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Hi!
My "little" time with FVD's modded VTG's and 1,2Bar boost (98 Euro fuel): 7.76' and 347 meters V-boxed at 12°C AT.


To W.K: I thought the 996TT compression ratio was 9.4 and the 997TT's 9.0

But sure, need high octan fuel.
 
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