Corte Loco

Hello guys. I´m very concern on the difference between the k24 turbos offered on the market. FVD offer 4 different k24 models for the 993 tt and they had different hp increase on all. What makes the difference? What are the part numbers on the normal k24 that came on the GT2? Are the 996 and 993 complete compatible? A 993tt can be used with 996tt k24 turbos with no other mod than the ECU? On Ebay we can find a lot of k24 in Germany but they only shows part numbers, wich number is correct for the Gt2? Sorry for my ignorance, but I´m trying to learn more before go to upgrades.

Regards

TB993tt

Corte
This subject is pretty difficult to fathom since different people have different names for the various trims of turbo. One persons GT1 is another persons K24S. The differences are between the basic shells of the turbos and then variations inside in the hot and cold sides - there can be an infinate number of variations.
The GT2 430PS road car had stock 993tt 408PS KKK16 fitted whereas the 450PS rated GT2 racers had different KKK24 units - their code is 993 123 014 82 compared with 993 123 014 51 for the 408PS KKK16.
For minimal lag and mid range, as well as WOT response it is imperative to buy an ECU and set of turbos as a package - If you simply tell Protomotive you have X or Y turbo you will not get the best possible programming (unless you actually take the car to them or buy the turbos off them so they know exactly what you are fitting). There are many respected tuners with well developed ECU and turbo packages - You mention FVD for one.

Jeff 993TT

I'd add to TB993tt's comment and say that there are other mods that you'll probably want to do as part of the complete package. These are to better realize the potential of the things you have and to increse longevity.

Things such as:
aux oil cooler
bigger intercooler
cat bypass/muffler bypass

Kevin

Corte Loco;

I'll make it real easy for you...

There are only "2" turbine housings made for the 993TT..... End of story

There is only "1" Compressor housing made for the 993TT....

There are only "2" Turbine wheels made for the 993TT....

There are hundreds of different compressor wheels for the 993TT...

Any 996TT K24's or K16's CANNOT bolt on to the 993TT.... however, you can rob parts from it to make it work but why... If you don't have the K24 turbine housing for the 993TT it will not work...

For the street car with drivers ed, you would be better off with a hybrid based K16... The K16's based turbo's today will out perform the K24's in every form...

Disclaimer... The above mentioned statements are for factory original parts KKK, yes Garretts and IHI parts can be machine to fit the K16/K24's

TB993tt

K16
K24
K26
K27
I have heard of all these being used on the 993tt

vrus

My friend's 858RWHP 993TT uses modified K26 turbos... I know they fit on the 993 but he is using matched Racing cats to bolt up to them..

I believe the stock flange on the 993TT cat pipes will only bolt up to the K16 or K24 turbos.

Kevin

TB


I mentioned this disclaimer:

Disclaimer... The above mentioned statements are for factory original parts KKK, yes Garretts and IHI parts can be machine to fit the K16/K24's

You are not going to machine in a K27 into stock housings... They won't fit...


The 993 GT2 3.8 ltr EVO did run K26 turbochargers, however they also ran large equal length headers. There was no provisions for heat exchangers and the exhaust exited right out of the turbine housing.

The 996TT GT2 runs K24's, similar to the K24's for our 993TT, the bearing housings used for the K24's are the same as late style K16's. The turbine housing are as mentioned different.

Tour18

Kevin, when it comes new turbo time, can we just tell you how we drive and you take it from there?

Steve Weiner-Rennsport Systems

Tour18:

I think Kevin can well do just that for you but remember, the ECU's software must match what turbos you run, otherwise its all a big waste of money,....

One thing,....choosing turbos and ECU's should not be an "al la carte" proposition; these critical parts are matched to each other and not all ECU programming nor turbochargers are the same.

Geoffrey

Kevin is by far the best turbo guy around. Just ask someone who recently bought a $5000 pair of "Special" k24s from FVD only to find out they are normal k24s. Take Kevin's advice and use a hybrid with matched ECU programming.

TB993tt

And a "normal K24" is

TB993tt

This is easy to say but tell me which tuners in the Republic of Panama (or the US for that matter) have the expertise and facitilties to "match" the 993tt's Motronic M5.2 with a set of hybrid turbos ? Sure you can buy an off the shelf program which will work, but will not take advantage of any unique features of the hybrids. This is why I said before it is important to buy the turbos and programming from the same (reputable) source.

Kevin

A side thought, It would really be fun to have a shoot-out for us 993TT brothers. I'd bring my car, I'd love to see TB bring his car over stateside, as an exibitor status. Maybe we can raise a rafle to bring him over. I had so much fun with the 996TT shootout. I think that this would be a blast... It would consist of a dyno day, track day. Skid pad and brake test.... Since are cars are a gen away from current, it might be hard to get a mag to show up and foot the bill. However, I could bring a few 996TT buddies, and a few 930 bretheren to the event on an invitation basis...

Geoffrey

What Kevin is saying is that there is only 1 true k24 and 1 true k16. The k26/27/28/29 are built on a different chassis than the k16/24 and are old technology turbochargers.

TB993tt

I think you are missing the points here, whilst there is a specific part no 408ps turbo and a specific part no Gt2 (450PS) turbo, and probably a specific part no GT1 (road spec) turbo, there are many other variations within K16 and k24 and whilst the K26etc are as you say on a different chassis and are not strictly "bolt on" it doesn't mean that these "chassis" cannot be made to work with the 993tt - if you like a bit of lag