K27 High Flow?

[adomakin]

does anyone know if the k27 high flow is a k27-7200?

what is the k27-7006?

Andy,

UK

[turbo6bar]

They are not the same. The 7200 is the stock turbo on the 964 turbo. I've heard the 7006 has more bottom end, but Imagineauto.com states it is for more top end. The High Flow is the one for massive power. Go to imagineauto.com for a comparison. I believe Bruce Anderson's book also has a few details.
jürgen

[adomakin]

cheers Jurgen.

[beepbeep]

Hmm...you are putting together some sort of hot engine, right? If performance was all that mattered, I would ditch KKK's and go for Garrett GT series. They shouldn't be too expensive and are in the different league performance-wise.

[adomakin]

you got me thinking Beep. im gonna have to start myself a new thread now in the engine bb!



Andy

[Brent 930]

The new high flow has just as good efficiency as the Garrett's with the new technology in the compressor wheel. You now have to consider if you run a Garrett to get the internals modified for use with the oil system of the Porsche air cooled engine. Then if you have a nice muffler you will have to butcher it up to change the exhaust flange. The high flow or 7200/7006 will still bolt right up with no other changes. This turbo is hard to beat, I was one of the first to use it and couldn't be happier. That is for CIS it's the best bolt on turbo I think.

[beepbeep]

Brent:

GT35 (which I would use in this case) has very neat conical ring flange attachment system. No rustly bolts to care about, just one C-ring tightened with only one screw. You can basically remove whole muffler in 2 minutes. If Andy is building as hot engine as i believe he is, chances are slim that he'll bother with OEM 930 muffler (which is quite crappy) but build his own. In that case, fast snap-on is even better.

There is no internal oiling modifications for Garrett, it just needs a reducer-valve in case oil pressure is extensivly high.

Here's a pic of snap-on flange on a GT40 (GT35 is almost identical):



I dunno about efficiency figures for KKK (they seem to be impossible to find) but do know that GT series is head and shoulders over older designs.

[Brent 930]

What turbo is that and where can I find the compressor map? I was never able to get the compressor map for the 7200 hi-flow but I do have the stock 7200 and 7006 one.

[adomakin]

oh my god, i dont know what to do. the garret looks sexy but i do still like the idea of a bolt in setup ala k27 hf. hmm...........beep beep, why do you like the garret stuff so much, and is it going to make that much difference with the spec of engine that i am planning on building? (3.3turbo, sc cams, 7.5-1 comp, headers, 1bar spring, upgraded turbo)

[Brent 930]

adomakin,

There are more options of turbos that the KKK line but there are also more options of what the turbos will do performance wise. It depends what you want but one thing is for sure you can only go so big for your application. Then as you already know if you stear away from the KKK line you will be forced to make mods. Once you get past CIS then it's a gimmie at that point. If you like I can send you a dyno chart running the 7200 hi-flow though I'm still stock compression but same stuff you have.

Brent

[beepbeep]

I uploaded the catalogue with maps for all new fancy Garrett turbochargers:

http://project911.luminasweden.com/garrettcatalog.pdf

That's partly the reason i like Garret...if you need info, it's widely available. They also: (crosspost)
1. Have fewer parts.
2. Are computer designed
3. Have easily available maps that help you to chose right size w/o having to speak with black magic shamans.
4. Their maps show good efficiency numbers.
5. You can get them in any way you want: black, white, Ball Bearing, floating, built-in wastegate etc.
6. They are usually installed on our Scania and Volvo lorries which make them easy to find

Also, I have lot's of friends doing all sorts of hillybilly chop-jobs with those turbochargers and liked the way a GT42 (bigger than life) performed on BMW 2002

KKK is little to much "MFI" for me...

[adomakin]

i would like to see that chart brent, where did you go for your high flow? (imagineauto perhaps?)

[Brent 930]

In fact the 7200 hi-flow was designed for max efficiency, keep low end (you gain approx. 300 rpms of lag but with SC cams it's a wash) and power to match a modified CIS fuel system and hold boost to redline. There is no reason to use another turbo except the 7006 hi-flow if your still CIS and modified. The stock 7200 dies like a pig fat pig up top.

[adomakin]

i dont get it brent. why would i want to use a 7006 high flow over the 7200 high flow with my planned engine spec?

[Brent 930]

Actually I didn't since I was one of the first ones to use it in a 930 CIS car. At the time I went right to the source where the guy who designed it was working there. He also knows the 930 car very well and with 20+ years of turbo charging experience. OK, now you know some history and why this turbo is a great match. PM me and give me your email and I will send you my latest chart. From the looks of my A/F curve you might not think I'm running CIS but I am...

[adomakin]

right, thought id fire this thread up again as i have changed my engine config and will be looking to buy a turbo soon (he says....)
so my ingredients list is:
3.3 turbo
1 bar (what dictates max bar? cht? egt?)
964 cams
twin plug
flame ringed
sds efi
big ass intercooler
headers of some description (any advice on off the shelf stuff?)
not a lot of silencing!

the question is still the same-k27 hf(or hf2 soon as im led to belive) or garret? and, if garret, oil or ball bearing? whats the difference (other than the obvious oil/bearing!)

Thanks,

[beepbeep]

Originally posted by adomakin
if garret, oil or ball bearing? whats the difference (other than the obvious oil/bearing!)

Thanks, [/B]

Difference is that BB is more expensive and has faster spoolup (not to be mixed with boost treshold).

[adomakin]

Hi Goran, does the ball bearing turbo eliminate the need for an oil feed?

could you advise me on which size garret to use in my application?

thanks,

[adomakin]

you there Goran?

[beepbeep]

Originally posted by adomakin
Hi Goran, does the ball bearing turbo eliminate the need for an oil feed?

could you advise me on which size garret to use in my application?

thanks,

No, you will still need oil-feed. What's your horsepower target and do you want twin or single-turbo?

What revband are you shooting for and what's your priority: top-end power or middle range?