spjuvern

any one know differens of the TTE550 and the evergreen k27 7200 raptor?

Metal Guru

Everyone who markets a turbo with their own "secret sauce" won't reveal what makes it special.
When I was deciding on a better turbo, there was only one source who I will not name. This vendor was mixing and matching bigger compressor wheels to the K27 frame. The issue then became that a bigger compressor spinning at 120,000 rpm needs special care in it's bearing design and balancing. That wasn't happening and customers found themselves with smoking turbos. The vendor had this preposterous requirement that you had to drive your car for 50-100 miles without getting into the boost as part of a "break - in period" (imagine Porsche telling you not to go over 50 mph in your new 911 so the wheel bearing get a chance to "break in"). That way if your turbo smoked, then you must have not followed the break - in procedure. Therefore, no warranty.
I ended up with a turbo sourced from a supplier (Durabilt; the owner died and they are now out of business) with a stellar reputation and never had an issue.
Carefully check the customer satisfaction of any business offering modded turbos. It's the wild west out there, kiddies.

Megatron-UK

I would have thought that with all of the 930 and 964's out there, there should be a market for someone to produce a a 'bolt-on' replacement for the K27, using a more modern, off-the-shelf design like a roller bearing Garrett model. From what I understand, the K27 (and other similar KKK turbos) are fairly old fashioned compared to current manufacturer designs.

It just seems like a lot of pain to modify old designs like this (with all the side effects that Metal Guru mentions, when it isn't done properly), when something tested and off-the-shelf could be used instead (obviously subject to a hot side design that mates with both the standard mounting flange inlet and the cat/exhaust outlet).

wicks

Should I put the belt back on my AIS?

997 tt/rs

sure.
tte 550 is a joke 7+7 65MM compressor and oem size 9 blade turbine, this combination will create a LAG and its design for high boost. Both pont less on 964 turbo.

Raptor is running oem size billet new design compressor and same as tte 9blade turbine, i heard its good combination

Metal Guru

I think Turbokraft has a kit to convert to a Garrett.

997 tt/rs

Garrett need water 😬

Black_Hat

I spoke with Chris @ TurboKraft about this
and
Chris said they run Garrett without water and have Zero issues
Contact Chris

Megatron-UK

It's actually very common in the Sierra/Escort Cosworth community to run uprated Garrett units (they use either a T3 or T34 as standard) without water cooling as it can result in big spikes in the rest of the cooling system where the water outlet from the core feeds back into the system... especially with uprated turbos. It has been done for decades without any major negative reports.

Metal Guru

Or run a separate system. Cobalt is water cooling his and using a 964 Tip tranny radiator and a pump. Bit for a street car I wouldn't go to all that trouble.

spjuvern

are there other better upgrade ones to choose from?

spjuvern

is this a good turbin to use?
https://shop.mambatek.com/9-Blade-Tu...0-012-0092.htm

is the 9 blade the best way of going with upgrade today?
my local turboshop claims 9blade would give slower spolup against original turbine but more top end performance.

Because of CIS I am not looking for best top end performance but best spoolup and 450whp

Metal Guru

You will need more than a turbo to achieve 450 whp.

997 tt/rs

im not sure if your local shop is right...this turbine wheel is lighter and new design..

spjuvern

would you say the evergreen Raptor is the best option out there then?
I don’t really understand your first post what turbos is that?
We don’t have something similar or better choice of turbo in Europe?

my local shop recommended just to mount a larger billet wheel in the k27 7200.
or change to a Precision Turbo 5558