cpt_koolbeenz

Got a couple of responses on the main board... Decided to try it here. Basically I want the best bang for the buck - pretty fast spool, strong boost to redline.

My main problem is this:
I'm really having a tough time with this decision still. Mark Szalaiy has the T04B Kokeln turbo and said the B compressor wheels can make more hp than the E's. That seems like it would be like a better time installing it but seems contradictory to what I've always thought and found here on the site. The larger compressor wheel was the reason for wanting to go with the K27/6... Has anyone had experience with both the K27/6 and the T04E with a 46 trim compressor wheel and had the #6 hotside machined out for a stage 3 turbine wheel? Is it worth $250 extra?

TonyG

cpt_koolbeenz

The best advice is:


Look at various dyno sheets untill you find one you like.

You can search the archives and find a ton of them.


Also... you can get closer answers if you be more specific than "pretty fast spool up"....

cpt_koolbeenz

Tony-
Did you get my email. In my original post, I stated that I had searched over 50 posts. I did some homework! I also have looked at many dyno sheets (including yours with the k27/6 at 330 hp). After reading your posts in favor of the K27/6, I felt that it was a good choice. At the same time, others are only for Garrett. I was hoping to hear some more opinions, since I've only experienced the K26/6. Pretty fast, as I meant it, would be close to the K26. But like I've said, I don't have much experience with other turbos. Unfortunately, I have to replace my turbo NOW as opposed to a time of my choosing (after I've had a chance to check other setups). So basically, I must make my decision on my trusty fellow 'listers.
Any input would be greatly appreciated.

cpt_koolbeenz

I'm looking for around 300-350 rwhp eventually. But don't want to upgrade the turbo again. I'm concerned that the K27 would not get me there at 6500 feet elevation. Not too sure.

BoostGuy951

A Garett is going to give you more HP potential and better spoolup. My Garett T04E Hybrid 46 Trim Compressor spools better than my K26/6 did. I suspect this is due to the newer bearing design, and probably that my stock turbo was old. However, there are some fitment issues to adress. If you don't mind a little work, I vote for a Garrett.

cpt_koolbeenz

Come on guys - its a turbo forum! Lets talk turbos! :P

cpt_koolbeenz

Thanks BoostGuy! I thought all the 951 owners were dead!
Anyone with K27 experience as well? Or high altitude for that matter?

Is the extra $250 worth it?

BoostGuy951

A resounding "Yes".

jchaley

I have a TO4E, 46 trim. In 4th gear if I floor the car at 2000rpm I will hit full boost (currently 15lbs) at 3200rpm( i live at 5000ft and tested on 40-60deg days). This is the same as my K26/6 with boost enhancer but otherwise stock. I have a cat by pass, guru chips and a MAF now.
My car pulls very hard. You can see dyno results from someone with the same turbo running 14PSI here.
http://www.dynopro.com/mhhr_detail.asp?ID=421

hope that helps.

john

Dwayne Williams

I just recently put in a T04B hybrid. Spools quite a bit faster than the old K26 and just pulls all the way to red. Very happy with that choice. Still need to get to the dyno but at 15 PSI it seems to be producing more than the K26 did.

Tom M'Guinn

I have a Huntley "stage 2" turbo. (Can someone tell me what it really is?)

My car is just so different than when I was running the stock turbo and wastegate, it is hard to say how it compares. It used to roll-on a modest amount of power. Now it has some lag and a ton of thrust around 3500-4000. It made 300 at the wheels with a leaking wastegate that could only hold about 15 psi. Now I run 19 psi to redline and it feels much much stronger. I'll be finding a new dyno sometime soon.

Ski

I can sort of speak for a Kokeln Stage V ( I guess if you want specifics you can call Lindsey). I bought it two years ago, along with the Kokeln intake system and stage I intercooler. The boost comes on hard at 3800-4000 and stays that way, increasing then tails off past 5400, and at 6000 rpm the torque curve position is the same at 4000. HP and Torque cross each other at 5450rpm. Wish my scanner worked.
At 17 psi it makes 282/291 on a Mustang dyno, we put in #3000 for the car on the dyno. I will probably be adding an MAF early next year, so the onset of boost should come 300-500 rpm sooner with better torque I would think, as I still use the "barn door".

turbo951fan

I have a KKK 27/6 / cat bypass and Guru chips with stock AFM (the chips were specifically burned for the 27/6 by Guru Racing). I am having full boost at 3,200 and the car pulls like crazy after that. When I got the car at first it had APE chips and boost came in at 3,700/3,800. The Guru chips changed the whole car. I do have another 28 PIN chip for the 27/6 available (left over from the MAP kit I had).

TurboTommy

For the power you said that you want to eventually have at your elevation, you'll need a compressor that can flow at least 600 CFM. A K27 is not quite up to the task. You need to study compressor maps of various compressor sections if you're serious about making the right choice. There are,unfortunately, alot of product codes and "stage this" and "stage that". What really counts is the CFM rating. There are alot of turbos on the market that flow enough for what you want; it shouldn't be that hard of a decision.

TonyG

jchaley

Although you may be making fill boost at 3200 rpms (which it doesn't look like that is reflected by your dyno sheet), your peak torque is very close to 4400 rpms. That's about 1000 rpms later than the K27/6 turbo.

Furthermore, your HP is rolling off at 5700 rpms.

The two above give you a very small area-under-the-curve.


The K27/6 provided me with at amost 2x the area-under-the-curve.


Also by the looks of it, it appears that your boost was spiking, then coming down.