Initial Impression of T04E
11-07-2002, 11:50 AM
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Initial Impression of T04E
Just got my car back on the road again with a new Garrett T04E from Turbo Engineering. The first drive was a real eye-opener! The boost threshold is similar to the K27/6, but then the boost builds rapidly and does not fall off. The car just pulls and pulls and pulls.
Even with the wastegate hose pinched off, my old K27/6 would only produce 14psi boost, and would heat soak at the track to the point where I'd get <10psi. I suspected the wastegate, even though it had been rebuilt/shimmed by Blaszak. Well, the wastegate is fine. I also installed a MBC sans cycling valve and hit 20psi before I turned the **** down to its current 15psi.
At Marren's recommendation, I'm using the stock injectors they serviced. But I'm at 6000ft and always use a 50/50 mix of 91 oct pump premium and 101 race fuel. Also still have the APE chips that came with the K27 and MAF. Mixture seems fine, but I will check on a dyno with a wideband O2.
The T04E is awesome. Will track test soon...
Gary
Even with the wastegate hose pinched off, my old K27/6 would only produce 14psi boost, and would heat soak at the track to the point where I'd get <10psi. I suspected the wastegate, even though it had been rebuilt/shimmed by Blaszak. Well, the wastegate is fine. I also installed a MBC sans cycling valve and hit 20psi before I turned the **** down to its current 15psi.
At Marren's recommendation, I'm using the stock injectors they serviced. But I'm at 6000ft and always use a 50/50 mix of 91 oct pump premium and 101 race fuel. Also still have the APE chips that came with the K27 and MAF. Mixture seems fine, but I will check on a dyno with a wideband O2.
The T04E is awesome. Will track test soon...
Gary
11-07-2002, 12:19 PM
#3
Rennlist Junkie Forever
If you could only get 14 psi boost, then you had a problem with either your turbo, turbo plumbing, wastegate or boost controller.
My previous 951 had the K27/6 turbo and would easily hit over 28 psi boost. Not only that, I could hold the boost to 25 psi on the dyno to 6000 rpms.
My previous 951 had the K27/6 turbo and would easily hit over 28 psi boost. Not only that, I could hold the boost to 25 psi on the dyno to 6000 rpms.
11-07-2002, 01:47 PM
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It's a 46 compressor trim, and the hot housing is custom cast by TEC. I don't know the specs on the turbine, but the housing is larger than the #6 and the wheel is noticeably bigger. It seems like a good match for my motor, which is stock, except for the APE chips and MAF, test pipe/exhaust, Forge bypass valve, and adjustable FPR.
And yes, there was likely something wrong with my old K27. The problem wasn't in the boost control, since it would produce only 14psi with the hose pinched off. It also wasn't the wastegate or pipes since none of that has changed. The turbine wheel was white from heat and there was a slight bit of play in the shaft.
But I've driven a couple other 951's with K27/6's and there really is no comparison with the T04E even at 15psi. And I don't see how the K27 could be efficient at 20psi+.
And yes, there was likely something wrong with my old K27. The problem wasn't in the boost control, since it would produce only 14psi with the hose pinched off. It also wasn't the wastegate or pipes since none of that has changed. The turbine wheel was white from heat and there was a slight bit of play in the shaft.
But I've driven a couple other 951's with K27/6's and there really is no comparison with the T04E even at 15psi. And I don't see how the K27 could be efficient at 20psi+.
Yeah, that thing can move a little air. 
11-07-2002, 02:50 PM
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Thanks for the specs GaryK, I am running a TO4E 60 trim #8 turbine that I had Extrude Honed and the outside coated with Swain's White Lightning on my new 2.8 ltr, 600 more break in miles on the motor and I can turn up the boost.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
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11-07-2002, 02:53 PM
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I've got the same turbo as Gary. It moves 560 cfm @ a pressure ratio of 2.0 (approx. 15 psi) and is 75% efficient at that PR. I think it's still over 70% efficient @ a PR of 2.5
My invoice was for $923.69, shipping included.
My invoice was for $923.69, shipping included.
11-07-2002, 03:11 PM
#11
Rennlist Junkie Forever
I've got a Garrett with a T-04 60-1 HiFi compressor and a 8cm turbin with a ball bearing center section.
When comparing my K27/6 against the new turbo, mentioned above, I have to say that the K27/6 was a little better on the street, whereas the Garrett is better down the long straights. A little more power up top, but the boost certainly hits a good 500 rpm later.
When comparing my K27/6 against the new turbo, mentioned above, I have to say that the K27/6 was a little better on the street, whereas the Garrett is better down the long straights. A little more power up top, but the boost certainly hits a good 500 rpm later.
11-07-2002, 04:25 PM
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[quote] Russ....Did you get your turbo from the same place? Can I have the info on them? <hr></blockquote>
Yup. TEC, or Turbo Engineering Corp. The phone is 303-271-3997. Ask for Jason. They have a website I beleive, but it was mostly under construction. <a href="http://www.turboengineering.com/" target="_blank">TEC</a>
By the way, 12 psi @3200 rpm. As much as you want by 4000.
Yup. TEC, or Turbo Engineering Corp. The phone is 303-271-3997. Ask for Jason. They have a website I beleive, but it was mostly under construction. <a href="http://www.turboengineering.com/" target="_blank">TEC</a>
By the way, 12 psi @3200 rpm. As much as you want by 4000.
11-07-2002, 04:36 PM
#13
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I've got a Garrett with a T-04 60-1 HiFi compressor and a 8cm turbin with a ball bearing center section. [quote] <hr></blockquote>
Tony g. isn't that a sfr stage 3 turbo?
and if it is how do you like it. i just ordered one for my 2.5 and would like some feed back thanks.
Tony g. isn't that a sfr stage 3 turbo?
and if it is how do you like it. i just ordered one for my 2.5 and would like some feed back thanks.
11-07-2002, 05:24 PM
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[quote]Originally posted by TonyG:
<strong>I've got a Garrett with a T-04 60-1 HiFi compressor and a 8cm turbin with a ball bearing center section.
When comparing my K27/6 against the new turbo, mentioned above, I have to say that the K27/6 was a little better on the street, whereas the Garrett is better down the long straights. A little more power up top, but the boost certainly hits a good 500 rpm later.</strong><hr></blockquote>
hey Tonny according to what you say it is not worth to change from teh k27 to the T04E if the K27/6 is already in the car.
is it worth the hassle for some HP on the top and a slower spool up of the T04E?
I would expect the T04E to has at leat 50 HP more at the same boost level!!!
Konstantin
<strong>I've got a Garrett with a T-04 60-1 HiFi compressor and a 8cm turbin with a ball bearing center section.
When comparing my K27/6 against the new turbo, mentioned above, I have to say that the K27/6 was a little better on the street, whereas the Garrett is better down the long straights. A little more power up top, but the boost certainly hits a good 500 rpm later.</strong><hr></blockquote>
hey Tonny according to what you say it is not worth to change from teh k27 to the T04E if the K27/6 is already in the car.
is it worth the hassle for some HP on the top and a slower spool up of the T04E?
I would expect the T04E to has at leat 50 HP more at the same boost level!!!
Konstantin
11-07-2002, 07:43 PM
#15
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I have a to4e 54 trim. Where do you see positive pressure? full boost? I can see 16psi at 3200 but you dont feel it til' around 3700. I must be really rich around there.