[stevieturbo]

Hi, calling here from the UK...

First car is a Ford Sierra Cosworth. Its a typical 2.0 16v 4 cylinder turbo motor, albeit fully forged, and stroked to 2.2

CR 8.0, ported head, mild cams ( circa 264 deg ), and with usual bolt on goodies to make some power.
Target is for circa 600bhp max, but with good spool characteristics. Willing to sacrifice a little power, for spool if it needs to go that way. Pump fuel only, with a little meth.

I was thinking along the lines of the GTK550 ?? on a T3 flange ( manifold has a T3 flange already )

Would this be the ideal choice ? How would it spool on such a motor ?

Second car is a Subaru. 2.35 litre, fully built motor, for BIG boost.

Target is for circa 900+, but would also like good useable boost from circa 4500rpm if possible.
EJ22T based motor, wills rings, fully forged, heads, Jun 272 cams etc etc.
It will be on 93 octane pump gas, but squirting a lot of methanol in there too. May use race fuel at some point.

Would the GTK1000 be the one to use, or could the GTK850 be pushed that far ?

Last turbo was an ITS T70 DBB unit, which worked extremely well, and spooled very fast. We need more though, and had considered a T76..

Both cars have manual gearboxes.


Any opinions ? and are the GTK's on the shelf yet ?

Cheers, Stevie

[r.j-lo]

Wow!
I cant help you very much as I am learing my way around the GTKs also, but they are definatly out there!

Good luck on the build(s) lol

[Robert]

Originally Posted by stevieturbo

Hi, calling here from the UK...

First car is a Ford Sierra Cosworth. Its a typical 2.0 16v 4 cylinder turbo motor, albeit fully forged, and stroked to 2.2

CR 8.0, ported head, mild cams ( circa 264 deg ), and with usual bolt on goodies to make some power.
Target is for circa 600bhp max, but with good spool characteristics. Willing to sacrifice a little power, for spool if it needs to go that way. Pump fuel only, with a little meth.

I was thinking along the lines of the GTK550 ?? on a T3 flange ( manifold has a T3 flange already )

Would this be the ideal choice ? How would it spool on such a motor ?

Second car is a Subaru. 2.35 litre, fully built motor, for BIG boost.

Target is for circa 900+, but would also like good useable boost from circa 4500rpm if possible.
EJ22T based motor, wills rings, fully forged, heads, Jun 272 cams etc etc.
It will be on 93 octane pump gas, but squirting a lot of methanol in there too. May use race fuel at some point.

Would the GTK1000 be the one to use, or could the GTK850 be pushed that far ?

Last turbo was an ITS T70 DBB unit, which worked extremely well, and spooled very fast. We need more though, and had considered a T76..

Both cars have manual gearboxes.


Any opinions ? and are the GTK's on the shelf yet ?

Cheers, Stevie

For the first car with a 2.0L motor the GT-K 550 might lag a bit. It uses a VERY large T3 turbine. In fact the exducer on that the GT-K 550 is larger then a T4 O trim turbine. Since you are concerned with spool up I would highly consider the GT-K 500. Its max flow rate is only 50 HP less then the GT-K 550 (GT-K 500 is good for 550 while the GT-K 550 is good for 600) but the spool up would be much better as it uses an F1-57 turbine (T3 Stage 3 sized but an F1 turbine wheel) which is smaller then the F1-62 (T3 Stage 5 sized but an F1 turbine wheel) used on the GT-K 550. Bottom line for this car and the power you can make the GT-K 500 would be a better fit in my opinion.

The second car looking for 1000 HP I don't know if you'll get to 1,000 HP on the GT-K 850. It uses an HP72 compressor wheel and the HP72 just doesn't quite have enough flow for 1,000 HP. It might be possible to hit 1,000 if you spray some nitrous as well but barring that I would suggest you look into the GT-K 1000. The GT-K 1000 uses an HP76 compressor wheel which is a brand new design of a T76 wheel. Since both the GT-K 850 and GT-K 1000 use the same turbine wheel you should see the same spool up times or very similar at the least with either unit. The HP76 is quite simply just 4 mm larger then the HP72. In my humble opinion the GT-K 1000 is the way to go for this car.

All GT-Ks are currently shipping. Any of the vendors on the banner links above should be able to get you any GT-K turbo there is.

[stevieturbo]

Cool...

Out of curiosity...Ive been reading info that Jose at forced inductions has been posting lately about some new turbos.

Is one of the new ETT 70mm compressor wheels the same as used in the GT-K1000 ? or is the GTK actually a 76mm wheel

I ask, because they say this new 70mm ETT wheel, will flow the same as a normal 76mm compressor.
Are these ETT wheels the same as used in the GTK series ? ( without actually knowing what ETT stands for )

I was considering this for the Subaru, as being a smaller wheel, should offer better spool, yet it still flows well, and can maintain very good pressure ratios.
But Jose only offers these in regular oil journal units.

Just not sure how much better the BB units are over an oil....Some say loads, some say not much. Given its a relatively small motor, I would think its best to have all the help you can get.
ive used a few different brands of BB units, and all have been excellent ( ITS T61, T70 and Precision PT63 )

I really want to try one of these GTK's though. If nothing else, it will look superb under the hood and I see Turbokits prices look pretty good !

[Robert]

Originally Posted by stevieturbo

Cool...

Out of curiosity...Ive been reading info that Jose at forced inductions has been posting lately about some new turbos.

Is one of the new ETT 70mm compressor wheels the same as used in the GT-K1000 ? or is the GTK actually a 76mm wheel

I ask, because they say this new 70mm ETT wheel, will flow the same as a normal 76mm compressor.
Are these ETT wheels the same as used in the GTK series ? ( without actually knowing what ETT stands for )

I was considering this for the Subaru, as being a smaller wheel, should offer better spool, yet it still flows well, and can maintain very good pressure ratios.
But Jose only offers these in regular oil journal units.

Just not sure how much better the BB units are over an oil....Some say loads, some say not much. Given its a relatively small motor, I would think its best to have all the help you can get.
ive used a few different brands of BB units, and all have been excellent ( ITS T61, T70 and Precision PT63 )

I really want to try one of these GTK's though. If nothing else, it will look superb under the hood and I see Turbokits prices look pretty good !

To be honest I'm not sure what ETT means. Can you post a link to that unit? In regards to the GT-K 1000 it is a true 76mm compressor wheel. All GT-Ks are offered only as ceramic ball bearing units. In regards to your question as to whether or not it makes a difference I think this write up could explain it better then I can:
http://turboneticsinc.com/turbo_ceramicbb.htm

Hope that helps.

[stevieturbo]

http://www.ls1tech.com/forums/showthread.php?t=707444

[Robert]

Originally Posted by stevieturbo

http://www.ls1tech.com/forums/showthread.php?t=707444

Looks like a Borg Warner unit. Sorry to say I can't really speak to them. Never seen them used much.