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Best t3/t4 for 7-12 lbs of boost

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DeezNutsForYou

20+ Year Contributor
282
0
Oct 31, 2002
I'm trying to help my friend put a turbo on his 98 tacoma. So far we have figured a t3/t4 is going to be the best for the cost. Cheapturbo.com sells them for around $550. Anyway the problem is I don't know which setup would be the most efecient. They don't have efectiency maps of those turbo on thier site. So does anyone have any suggestions, we want to run somewhere between 7 and 12 lbs of boost. I'm note sure if we should go with a 50, 57, or 60 trim. And .48 or .63 a/r. I was thinking of this turbo, the Garrett T3/T04E 57 trim W/.48 A/R Turbine, here are the specs.

COMPRESSOR SPECS:

.60 A/R HOUSING

57 TRIM WHEEL

TURBINE SPECS:

.48 A/R HOUSING

STAGE 3 WHEEL

One more thing, is a 35mm wastegate going to be big enough.
Thanks for the help, I really appriciate it. I only wish I knew more about turbo's.:thumb:
 
You will want atleast a .63 housing, not the .48. 48 is argueably too small for a 2.0L and on a 2.7L with probably 9:1 or greater compression, .63 may even be too small.

I would call AGPturbo.com and ask them what they can suggest and get pricing.
 
So far we have figured a t3/t4 is going to be the best for the cost.
Click to expand...

I disagree 100% ;)
I think that a t25 would better suit your needs! Im not sure if it would be large enough for that displacement, but I still think a t3/t4 just isnt as efficient at those smaller boost levels than something smaller...why in the hell would you buy a t3/t4 to run 7 lbs of boost? A smaller turbo will obviously reach its peak a lot quicker than a t3/t4, but if boost is kept under 12lbs all the time then a T-25 would be quite the performer. It can hold 7-12 to redline (if its in good shape), you can find one for prolly like 200$ in perfect shape, no external gate needed and it will make lots of torque on that 2.7L...

Anyhow if you are going to get a t3/t4 then get something very small. WHat you listed is basically the smallest of those hybrids they sell at that site. WHy not a t28 or something? Or a straight T3?
http://store.yahoo.com/cheapturbo/garrettt28.html

Austin
 
Originally posted by DeezNutsForYou
I'm trying to help my friend put a turbo on his 98 tacoma. So far we have figured a t3/t4 is going to be the best for the cost. Cheapturbo.com sells them for around $550. Anyway the problem is I don't know which setup would be the most efecient. They don't have efectiency maps of those turbo on thier site. So does anyone have any suggestions, we want to run somewhere between 7 and 12 lbs of boost. I'm note sure if we should go with a 50, 57, or 60 trim. And .48 or .63 a/r. I was thinking of this turbo, the Garrett T3/T04E 57 trim W/.48 A/R Turbine, here are the specs.

COMPRESSOR SPECS:

.60 A/R HOUSING

57 TRIM WHEEL

TURBINE SPECS:

.48 A/R HOUSING

STAGE 3 WHEEL

One more thing, is a 35mm wastegate going to be big enough.
Thanks for the help, I really appriciate it. I only wish I knew more about turbo's.:thumb:
Click to expand...

How much power do you want to make and what is your RPM window. Also is that motor a 16v or an 8V.
 
I had a tacoma 4wd that was inspired by a gsx. I ran a stock turbo from a nissan 300zx. I am not sure the exact model of that part. I had a 2.7 liter 4-cylinder tacoma that was raised. Custom turbo setup with a FMIC. Stock internal and bottom end. my best time was 14.23 1/4 mile. Everyone was supprised that my tacoma was that fast with big tires and it being raised and all. PM or IM me for further info.
 
wow thats really fast for a lifted truck. Where did you get your exhaust manifold from, and what size injectors did you use. If you could think of anything that might help us, we would REALLY appriciate it. Thank you very much, and it makes us very hopeful to see another turbo taco. One thing I'm not sure of, is whats the highest (safest) boost we can run. I was thinking around 12psi. What was yours
and thanks again for the help.
 
Grab a turbo of a MK3 Supra. Stock boost is 7, can run to 15psi ans still be efficent. The ct26 is the turbo for you.
 
Well the reason I suggested these smaller mitsu used turbo's is because you are a dsm'er and know how cheap you can get these and what they do...

I know you want the most flow, who doesnt:rolleyes: But if 12psi (which I think may be a bit much for a stock bottom) is the MOST you will run then something smaller will flow pretty cool air. Regardless of cfm ratings a smaller turbo willcome alive much quicker and have much more of a usable/enjoyable powerband for something like that. 2.7L is enough OMG and 5500rpm, I just dont think you need to go overboard.
Im sure a 14B woudl be pretty cool and work great for you, as would some of the others I mentioned last post.

MK3 supra=88-91 and Im not sure about the ratings on the ct26, but I know there have been MK3's going like mid 12's on them, with lots of other upgrades of course. I think its somewhat similar to a 14b in cfm aspects...
 
I come from A supra back round. Had three of them before i laid eyes on a dsm. The 14b is a good mitsu turbo but i beleive the .ar is going to be to small for a 2.7 leter. I think it wouldnt be the best for VE.

The ct26 is used on a few toyota aplications. The 7m gte(87.5-92 mk3 supra) 3sgte (91+mr2, and celica alltrac turbo) But the reason you should use the supra one is because the Ar is bigger then both the celica, and mr2's. This is because the supra is a inline 6 - 3.0l, and the other are 2.0 4 bangers. But the inlet side is the exact same.

I believe this turbo is going to be better suited to your application.
The ct26 is not a small turbo, and it dwarfs the 14b. Its efficiency is best suited to the 7-15 psi range. which is exactly what your looking for. It will also push alot more cfm then a 14b. You can pick one up for a good price to. Probley about the same as a 14b.

Trust me this is the turbo you want. the 14b is to small. your going to lose power in VE, and will not be as efficinet as the ct26:thumb:
 
11 psi or less I would say get a T25, For 12-14psi I would get a 14b. Both those turbos spool very fast (especially on a 2.7 liter) and are effecient at those boost levels. You dont need a T3/T4 for those low boost numbers.
 
The best bet would be to get some maps and calculate the best turbo for the application. The latest Turbo mag has a good descripition on how to do this, and Turbonetics have quite a few maps.

AWDriven.
 
Depends on what ct26 you are thinking of getting. Toyota never published maps for the ct26. But it is very similar to the 14b in many ways. I persoanlly coubt that its good for more power than a nice ported out 14b, as most Mr-2 owners swap them out after a little more than 210whp or so because they arenet very good for boost above 12psi... But the newer versions of the ct26 were pretty good, the st-185 6 bolt flanged ct26's ere a little better all around. It is watercooled just like the 14b though. ANyhow you know the 14b's optimal range is like 8-17psi and it sure will make good power up there.
http://www.stealth316.com/images/td05h-14b-cfm.gif


good luck

austin
 
thanks Austin, I'm for sure going with the 14b or ct26 but I'm still not sure which is better. It sounds like your in favor of the 14b but I will only be able to run 12psi max. So do you still think the 14b is better, thier both really cheap so either way is a good buy. What about bolting it up, does the ct26 have a standard flange or will it take some modification. Thanks for all your advice you definetely seem to know what you're talking about.

and thanks for the flow map
 
Im sure either woudl be pretty good for you. THe 14b jus tseems a little cooler to me cause its mitsu;) Anyhow the old 4 Runner's and pickups that used to come with the 22-RE's also came turbo. They had ct20's and a very similar bolt pattern. My teacher at school had one and we custom mounted a ct-26 to it. They are both 4 bolt turbine inlet flanges but the ct-26 is a little longer. So either you can make (or buy from a shop that sells any type of manifold or exhaust for them and just use the flange from it) a spacer or just drill out the hole and make them longer so it will bolt up. My point is tht you can find an old 22R motor's exhaust manifold and prolly just use that for you bolt up. Im not sure how hard it would be with bolting up to the head but it might be a nice start for the flanges. But if your planning on haveing someone make you a custom tubular manny :thumb: then this doesnt really apply. Yuo could bolt up the 14b or ct26 that way;)
 
thanks agian, I'm pretty sure about the 14b now, but one last thing you said the turbine inlet flange is a little longer. So if I want to run a 14b will I have to get a spacer, or were you talking about the ct26.
thanks

Josh
 
The manifold was custom built by a guy here in San Diego. I had an external delta wastegate. I had stock injectors , but had a external fuel pump that i got from pep boys. Im sure you can port the throttle body out.
 
Originally posted by DeezNutsForYou
We are shooting for 250 to 260 horse at the rear wheels. The rpm range is from 2500 to 5500, and it is a 16valve motor. Any other questions feel free to ask.
Click to expand...

Compressor: TO4E 46 trim in a .50 A/R housing

Turbine: 76 trim Stage III turbine wheel in a .63 A/R turbine housing.

MAX hp for that turbo is about 330whp but it will be in it's best efficiency range around 250-300whp and will be in your RPM window.
 
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