Turbo selection

Kerry Phillips · 08-13-2009, 05:29 PM

Been thinking about a potential turbo. VW/Audi has a 1.8 Litre 20 Valve engine with VVT (sounds like our beloved silvertop) 9.5-1 compression that produces 180 horses, or 100 HP/Litre. What attracts my attention is their impressive torque curve, 174 pounds @ 1950-5500 RPM. The K03 turbo is small and is more of a torque enhancer then high end power. My thinking is to drop the boost by a pound or two to compensate for the ST slightly higher compression and use the VW turbo. I am more interested in bottom torque for city driving then high HP for racing. This turbo can be had new for $300

Any comments on my thinking or alternate choices for a turbo?
kerry

328FTW · 08-13-2009, 11:49 PM

Is it a steel or ceramic turbo? Ceramic are all fine and dandy except they have this tendancy to explode in your intake when the turbine touches the housing normally from pushing it hard or a worn bearing. The KO3 only runs at 7psi or so so they won't give huge boost but yeah maybe for a lower boost setup it would be alright. I know nothing about the KO3 you basically have to go out and google it and find builds that use it or ask the audi guys about it. You can putany turbo on an engine just how good is it going to work.

Capt.Evergreen · 08-14-2009, 11:42 PM

sound fine... is there any internal work on the 20v.... ive seen hell of 20v turbos out ther almost more than 4agtes.... yeah tuneing and a head gasket would be the least for reliability... im looking for a 20v if the tourq is like that...is it ST or BT with the light internals..?..... LIFE

Capt.EverGreen

Kerry Phillips · 08-15-2009, 08:04 AM

The engine is Silvertop, slightly lower compression then a blacktop, heavier internals and uses an AFM instead of a map-supposedly easier to add boost.

Again, with mild boost the stock headgasket should be fine, hopefully. Ideally the boost would be lowered at the wastegate, the Intercooler and plumbing would drop the boost some more, about 4 pounds at the throttle.

4 pounds is not much, but if I can get that boost at just above idle, it should be sweet. With premium street gas and the anti-knock sensor, the ecu should have enough range.
Kerry

Capt.Evergreen · 08-15-2009, 04:15 PM

looks like your good then... sounds nice...

Capt.EverGreen

Allmotor87mr2 · 08-15-2009, 04:17 PM

The k03 is a good turbo ive got it on my 02 gti and it steel. stock 7lb boost but can push out 12 all day thats what ive got mine at. have you thought of a ct26? i also have a subie turbo thats good if you want to try that out. i put it on my friends sohc d15 vtec honda and it works very good. let me know what you want ive got alot of diffrent turbos for good prices and low miles.

08-13-2009, 05:29 PM	#1 (permalink)
Kerry Phillips Cage Fighter Join Date: May 2006 Location: Chattanooga, TN area Posts: 299 Thanks: 0 Thanked 21 Times in 21 Posts iTrader Rating: (0/0% )	Turbo selection Been thinking about a potential turbo. VW/Audi has a 1.8 Litre 20 Valve engine with VVT (sounds like our beloved silvertop) 9.5-1 compression that produces 180 horses, or 100 HP/Litre. What attracts my attention is their impressive torque curve, 174 pounds @ 1950-5500 RPM. The K03 turbo is small and is more of a torque enhancer then high end power. My thinking is to drop the boost by a pound or two to compensate for the ST slightly higher compression and use the VW turbo. I am more interested in bottom torque for city driving then high HP for racing. This turbo can be had new for $300 Any comments on my thinking or alternate choices for a turbo? kerry

08-15-2009, 08:04 AM	#4 (permalink)
Kerry Phillips Cage Fighter Join Date: May 2006 Location: Chattanooga, TN area Posts: 299 Thanks: 0 Thanked 21 Times in 21 Posts iTrader Rating: (0/0% )	Turbo The engine is Silvertop, slightly lower compression then a blacktop, heavier internals and uses an AFM instead of a map-supposedly easier to add boost. Again, with mild boost the stock headgasket should be fine, hopefully. Ideally the boost would be lowered at the wastegate, the Intercooler and plumbing would drop the boost some more, about 4 pounds at the throttle. 4 pounds is not much, but if I can get that boost at just above idle, it should be sweet. With premium street gas and the anti-knock sensor, the ecu should have enough range. Kerry

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08-13-2009, 11:49 PM	#2 (permalink)
328FTW Crazy Nasty Honey Badger Join Date: Aug 2008 Location: New Zealand Posts: 5,236 Thanks: 24 Thanked 266 Times in 239 Posts My Google Map iTrader Rating: (1/100% )	Is it a steel or ceramic turbo? Ceramic are all fine and dandy except they have this tendancy to explode in your intake when the turbine touches the housing normally from pushing it hard or a worn bearing. The KO3 only runs at 7psi or so so they won't give huge boost but yeah maybe for a lower boost setup it would be alright. I know nothing about the KO3 you basically have to go out and google it and find builds that use it or ask the audi guys about it. You can putany turbo on an engine just how good is it going to work.

08-14-2009, 11:42 PM	#3 (permalink)
Capt.Evergreen that guy Join Date: Apr 2008 Location: ATL GA Posts: 439 Thanks: 2 Thanked 1 Time in 1 Post iTrader Rating: (0/100% )	sound fine... is there any internal work on the 20v.... ive seen hell of 20v turbos out ther almost more than 4agtes.... yeah tuneing and a head gasket would be the least for reliability... im looking for a 20v if the tourq is like that...is it ST or BT with the light internals..?..... LIFE Capt.EverGreen

08-15-2009, 04:15 PM	#5 (permalink)
Capt.Evergreen that guy Join Date: Apr 2008 Location: ATL GA Posts: 439 Thanks: 2 Thanked 1 Time in 1 Post iTrader Rating: (0/100% )	looks like your good then... sounds nice... Capt.EverGreen

08-15-2009, 04:17 PM	#6 (permalink)
Allmotor87mr2 Island Auto Warehouse Join Date: Aug 2009 Location: Redlands, CA Posts: 16 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	The k03 is a good turbo ive got it on my 02 gti and it steel. stock 7lb boost but can push out 12 all day thats what ive got mine at. have you thought of a ct26? i also have a subie turbo thats good if you want to try that out. i put it on my friends sohc d15 vtec honda and it works very good. let me know what you want ive got alot of diffrent turbos for good prices and low miles.