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Re: 20VT Turbo Choices
[Re: Cyclone]
#1646296
19/11/2020 13:35
19/11/2020 13:35
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Joined: Dec 2005
Posts: 17,367 Staffordshire
Nigel
Forum veteran
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Forum veteran
Joined: Dec 2005
Posts: 17,367
Staffordshire
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Hi Jules You might find it's better to run a turbo capable of more power, but then run it well within its capabilities. For example, a GT28R or RS will give 300bhp , but the turbo will be working hard - something around 1.2 - 1.4 bar, which generates lots of heat By comparison, something like a GT2871R will generate the same airflow (and thus the same power) at a lower boost level - eg 1.0 - 1.2 bar. Bearing in mond the turbo will run at 1.5 bar or more, then you'll end up with a setup running well within its limits, rather than at the limit. Just make sure you specify a smaller exhaust turbine housing to keep the lag to a minimum. Running a bigger turbo is also better for when you inevitably get bored of 300bhp and decide that 400 would be more entertaining....
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Re: 20VT Turbo Choices
[Re: Nigel]
#1646297
19/11/2020 13:53
19/11/2020 13:53
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Joined: Feb 2006
Posts: 5,390 Essex
Trappy
Forum is my life
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Forum is my life
Joined: Feb 2006
Posts: 5,390
Essex
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I'd be looking at new technology now. How about a G25-550? Chap who runs a YouTube channel called TeamPrawnRacing has one on a 1.8 Audi A3 race car. It made somewhere in the region of 450bhp at high boost but he has it detuned to 360bhp (IIRC) for a race series.
F****** b****** thing...
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Re: 20VT Turbo Choices
[Re: Nigel]
#1646305
19/11/2020 16:48
19/11/2020 16:48
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Joined: Dec 2005
Posts: 554 Nottingham
Cyclone
OP
Enjoying the ride
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OP
Enjoying the ride
Joined: Dec 2005
Posts: 554
Nottingham
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Hi Jules You might find it's better to run a turbo capable of more power, but then run it well within its capabilities. For example, a GT28R or RS will give 300bhp , but the turbo will be working hard - something around 1.2 - 1.4 bar, which generates lots of heat By comparison, something like a GT2871R will generate the same airflow (and thus the same power) at a lower boost level - eg 1.0 - 1.2 bar. Bearing in mond the turbo will run at 1.5 bar or more, then you'll end up with a setup running well within its limits, rather than at the limit. Just make sure you specify a smaller exhaust turbine housing to keep the lag to a minimum. Running a bigger turbo is also better for when you inevitably get bored of 300bhp and decide that 400 would be more entertaining.... Thanks Nigel and appreciate your response. The larger turbo makes sense based on reducing heat and a smaller exhaust turbine / housing to reduce lag. The car won’t be used much as want to keep it long term, so I’m not too fussed on going down the forged engine / big turbo route.
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Re: 20VT Turbo Choices
[Re: Trappy]
#1646306
19/11/2020 16:48
19/11/2020 16:48
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Joined: Dec 2005
Posts: 554 Nottingham
Cyclone
OP
Enjoying the ride
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OP
Enjoying the ride
Joined: Dec 2005
Posts: 554
Nottingham
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I'd be looking at new technology now. How about a G25-550? Chap who runs a YouTube channel called TeamPrawnRacing has one on a 1.8 Audi A3 race car. It made somewhere in the region of 450bhp at high boost but he has it detuned to 360bhp (IIRC) for a race series. Thanks for that I’ll check it out
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Re: 20VT Turbo Choices
[Re: Cyclone]
#1646309
19/11/2020 19:14
19/11/2020 19:14
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Joined: Dec 2005
Posts: 17,367 Staffordshire
Nigel
Forum veteran
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Forum veteran
Joined: Dec 2005
Posts: 17,367
Staffordshire
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I’m not too fussed on going down the forged engine / big turbo route. Yup - that's what I thought too, and look where I ended up...
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Re: 20VT Turbo Choices
[Re: Nigel]
#1646479
25/11/2020 09:32
25/11/2020 09:32
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Joined: Dec 2005
Posts: 1,576 Glasgow,Near Florence..If only...
paul
My life on the forum
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My life on the forum
Joined: Dec 2005
Posts: 1,576
Glasgow,Near Florence..If only...
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Hi Jules By comparison, something like a GT2871R will generate the same airflow Running a bigger turbo is also better for when you inevitably get bored of 300bhp and decide that 400 would be more entertaining.... this is what I'm running with lots of other mods.....running 1.4 and approx 400bhp ........yes I have to agree with Nigel its very entertaining
was Paul S,now just paul...Member since Oct 2000,Coupe may be FATALLY injured - :(oh no it's not
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