Does anyone have any experience with the TO4 turbo? I have my mind made up on getting the Protech manifold with the TO4 turbo. Lag shouldn't be a concern with my intake manifold along with the high compression. I'm thinking about a TO4E 60 trim compressor .50 A/R along with a TO4 turbine with a .82 A/R turbine side. Am I on crack or do I have balls? Pull no punches...

Originally posted by Big Boost
Does anyone have any experience with the TO4 turbo? I have my mind made up on getting the Protech manifold with the TO4 turbo. Lag shouldn't be a concern with my intake manifold along with the high compression. I'm thinking about a TO4E 60 trim compressor .50 A/R along with a TO4 turbine with a .82 A/R turbine side. Am I on crack or do I have balls? Pull no punches...

Well, seeing that the T4 doesn't have a .82 A/R exhaust housing, I would suggest this:

T04E
.60 A/R Compressor Housing
60 Trim Compressor Wheel

.58 A/R Turbine Housing
"O" Trim Turbine

It should be good for 500+ whp no problem! Try and get a ball bearing center section to eliminate lag.


You could also go with a T04B Compressor housing. It is larger than the T04E. You can go with a:

T04B
60-1 Compressor Housing
60-1 Compressor Wheel

.58 A/R Turbine Housing
"O" Trim Turbine

This will be able to support 500-550 whp!

I meant .81 A/R. My mind went typed faster than my brain. Thanks!

The manifold can be made with a T3 flange. It dosen't have to be a Straight T4 turbo.

I've got a divided-turbine T4 that I'm going to install in about a month, so i can't comment on how it drives, but I can relate all the info I've been able to get so far.

This turbo would not be my first choice, but I got the turbo and manifold from a deal so I figured I'd throw it on until I can afford a 3037. My turbo specs are as follows:

Turbine: T4, divided housing, .58 a/r, 2.296" exducer ( i don't remember which letter trim this is, but you can check the exducer measurement on the turbonetics site. The numeric trim is 62)

The following are Rob Cadle's comments about the turbine from a private conversation:...."We have a map of that turbine in a .58 A/R housing... it's not too bad, about 70-72% turbine efficiency, flows about 21-22 lbs/minute. The efficiency is better than a 76 trim T-3 in an 0.82 A/R turbine housing, but the flow is down about 10%."

Compressor: T04E, .60 a/r housing, 60 trim

Rob's comments: "If it is a 60 trim T-04E compressor, the compressor is too big for the turbine, in my opinion, meaning that the turbine will be choking way before the compressor will. I don't think it will be that bad. The turbine is really heavy--lots of
inertia, but the flow curve and the efficiency are both better for transient response than a Stage 3 (t3/t04E) in a 0.82 A/R housing would be. I'm guessing it will start to make boost about 3500 RPM, with full boost around 4200-4500. I think it should support about 350 whp or so."

I'm pretty sure the T04B is a smaller compressor than the E. Rob described the 60-1 wheel as "shit" Although the T4 is a "bigger" turbo than a t3/to4e hybrid, its the sizing that really makes it. a .58 a/r turbine is the small end of things and doesn't really match well with the 60 trim compressor. a better match would be the 50. This is nowhere near a balls-out horsepower turbo (note the predicted 350 whp) and may be less-than-ideal as a street turbo (we'll have to wait to find that out) . My main concern when I acquired the turbo was that it would be a laggy pile of poop on the street and would have a hard, late boost onset. I figured I'd just play with it for a while and then swap it for something more streetable. Talking with rob eased my worries about streetability, but now i know its probably not going to support future rediculous horsepower goals.

YMMV etc :) I'm curious to see how it drives when i get it on. I'm still getting the rest of the hardware together. Bear in mind the comments above are based on the turbo being mounted to a long-runner equal-length behind-the-headlight affair.

This is going to be for a crazy-horsepower car right? is it going to be street driven or race-only? If you're looking for more than a stage 5 t3/to4 hybrid can provide, i've heard of an OEM turbodiesel unit not available in the aftermarket, that can be had for cheap off-the-shelf. No-one has tried it yet, but it supposedly has the potential to kick ass if someone is willing to experiment. If you're interested, I'll get the info...

Andris Laivins
SRX-class roadrace turbo monkey beast coming soon

I am looking for a unit that will propel my SE-R to low 11's with full street trim. After searching various options, it seems that only the straight TO4(E/S/X) style turbo will get the job done. To utilize the 60 trim compressor, I think that a .81 A/R Stage IV or V
unit would be optimal. If the flow characteristics are down 10%, I'm sure that the Extrude Hone process can recover some of the flow loss.

I ran low 11's a couple of years ago w/ a T3 TO4E and an off the shelf F-Max Kit in my daily driven street car. That turbo is quite capable of taking the car where you want to go. I was putting down around 425 HP and 375 ft/lbs to the wheels then with the low port head. The car would run mid to low 11's at will. With your short runner manifold, you are definitely in the low 11's. With the money you are going to spend on the turbo and manifold, I would suggest to instead build the engine to take more boost and do a mild port on the head.

I want to thank everyone for their input and info you all provided. I am so torn between a balls out drag car and a street car. I've been told numerous times that the Stage 5 TO4E/T3 should do the trick and could get me to hit high 10's.

Ben, did you sell your car yet? What were your experiences in dealing with a full blown drag car?

Nope, still have the car. Its quite a bit different owning an all out drag car versus a street car. I have had both and they both have their advantages. Its nice to get into your car everyday and enjoy it, but I also got into trouble because of it. The race car seemed like the thing to do at the point where my street car was running low 11's. The street car didn't have a cage and was constantly getting thrown off the track for running 11's without the cage. I found a decent 200SX SE and tore into it. Having the race car is tons of fun, any 10 second car is going to run with the fastest cars at the track. I am talking about walking by some of the meanest V-8's out there. I miss the street car, but its probably best that I decided to build the race car because I used to have a hard time turning down a street race. Its hard to justify having a street car with 400+hp, that much power really belongs on the track.

Damn, you've basically summed up my exact thoughts regarding street versus strip. I really don't have any problems getting myself into trouble when it comes to street racing, but the temptation will always be there. On the flip side, my mind is telling me to keep the car on the street just to showcase some of my upcoming products. I just have to sit down and decide. Damn.

what are your thought on this turbo guys?

60trim To4e wheel in .60 a/r To4e comp housing

Turbine:Stage 3 size T-31 turbine wheel, clipped in .63 T3 housing


Iam planning to use this turbo anybody have any ideas of its effcientcy or maps?

Thanks Lawrence
92 se-r turbo
90 Talon TSI

Originally posted by Big Boost
I want to thank everyone for their input and info you all provided. I am so torn between a balls out drag car and a street car. I've been told numerous times that the Stage 5 TO4E/T3 should do the trick and could get me to hit high 10's.

Ben, did you sell your car yet? What were your experiences in dealing with a full blown drag car?

Chris Allen aka Shaggy dynoed 497 whp with the T3/T04E .82 A/R Housing Stage V Turbine & .60 A/R Housing 60 Trim Compressor wheel mounted on a modified GTiR Manifold!

That power is good for a very low 11 - high 10 second pass in full street trim!