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Turbo Question: Big turbo vs smaller 

 

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 Post subject: Turbo Question: Big turbo vs smaller
Posted: Sun Feb 01, 2009 8:31 pm 
Stock as a Rock
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Age: 30

Posts: 109

Joined: 11th Nov 2006

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Ride: ED fairmont turbo

Location: sunshine coast
QLD, Australia

My question for the turbo guru's out there is, would a bigger turbo say gt45 on 10psi be less prone to detonation then say a gt35r or similar?

 

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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sun Feb 01, 2009 10:36 pm 
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Age: 42

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Joined: 21st Dec 2008

Ride: NC FAIRLANE

Location: Newcastle
NSW, Australia

It is all in the tune, would not matter what size the turbo is.
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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sun Feb 01, 2009 11:06 pm 
Getting Side Ways
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Age: 29

Posts: 975

Joined: 26th Nov 2004

Ride: el falcon

Power: 608 rwkw

Location: Waroona
WA, Australia

bigger compressor will heat up the air less
bigger turbine will create less back pressure

 

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# 2008 FPV FG GTE - Xa Coilovers, 20x8/ 20x10 Fairladys

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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Thu Feb 12, 2009 4:27 pm 
Getting Side Ways
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Age: 29

Posts: 516

Joined: 27th Oct 2007

Gallery: 20 images

Ride: ef xr6 turbo

Location: whyalla
SA, Australia

Wouldn't the only difference be just the spooling up time.. Ie smaller comes on boost earlier but doesn't have as much pull in top end and larger takes longer to spool up but comes on boost hard

 

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there are a few falcons in my drive way, some of them are turbo charged and some arent, some have big engines and some are small but they all have one thing in common and that is the blue oval on the front

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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Thu Feb 12, 2009 4:38 pm 
Getting Side Ways
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Age: 64

Posts: 3552

Joined: 7th Nov 2004

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Power: 482 rwkw

Location: Penrith
NSW, Australia

Boost coming on too hard at low rpm can cause engine issues..
Depends on how small ?? and big ??
Herd something like this before ??
I guess its the way its used..

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sat Feb 14, 2009 10:52 pm 
Stock as a Rock
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Joined: 18th Nov 2004

Ride: turbo

Location: melb
VIC, Australia

i have a t51 on mine which is about the same size as a gt4202 and are both good for 1000hp im told. i was also told it should make power from 3 grand (i wish) the power starts at about 5 and the rev limiter is at 6500 its fair crap for road use. i had a t4 on my last ef it squirted fairly hard but didnt rev much past 4 grand. the best combo i found was the 35/45 it had about as much lag as the t4 but makes bucket loads more power. i am concidering going back to one.
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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sat Feb 14, 2009 11:48 pm 
Getting Side Ways
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Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

Try a lower trim exhaust wheel ??

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sun Feb 15, 2009 6:38 am 
Stock as a Rock
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Posts: 100

Joined: 18th Nov 2004

Ride: turbo

Location: melb
VIC, Australia

you mean housing. and yes i am going to try that first but i can only go down one size or else i have to change flanges as they are diferrent sizes
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 Post subject: Re: Turbo Question: Big turbo vs smaller
Posted: Sun Feb 15, 2009 10:08 am 
Getting Side Ways
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Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

Yes A.R can too..
I mean the trim of wheel..
On my T3/4's I went from 67 trim to 78 and rpm spool increased 800 rpm.. The turbine is the same..
Here is an example T3 / T3/4 comparo The wheel trim on left turbo is greater..
Image

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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