Which turbo is best?
 

Hey, I've got an 87 turbo and I'm looking to do a couple mods. I am wondering what turbo is best suited for it. I am looking for 12-18 lbs of boost. I'm also going to do a couple other mods, exhaust, filter, possibly bigger injectors and intercooler. Thanks

depends on what you want to spend.
driftmotion 57 trim fits my needs.. MP 67 may fit yours. its about who wants to spend the most and has an engine capable of handling that many lbs.

Set a horsepower goal and I can try and help you out with that.

These shouldn't be optional for 18psi. Make sure engine health and maintenance are current first to be sure the engine (and car) is up to handling the upgrades. You really need a target HP number for anyone to suggest any upgrades.

A target horsepower just helps select a proper turbo that wouldn't produce too much lag. You also have to pick one that can handle that amount of power.

And I completely agree with you, Supracabras. If you're running that much boost, you need to upgrade your injectors and intercooler.

I would like to get about 300hp to start with. Could I also get some recomindation on a bov. I like the classic, pshhh, not the wistel kind. I like the greddy rs. Anyone have. Any recomendations?

To be honest I think the CT26 as stock is pretty much up to handling 300bhp, anyone correct me if i'm wrong?

An upgrade of injectors is pretty much essential once you start to up the boost more, I got away with 11lbs on the CT26 and stock injectors (although see my other thread for what happened the other day :wtc: ) and only very occasionally hit fuel cut when really giving it some boot. I believe (again anyone correct if I'm wrong) that Lexus LS400 V8 injectors are a bolt in & allow 100cc extra flow?

300 is my base goal. I'm fine with hitting more. I would like a turbo, that I can turn down to about 10-12 at the start of my build and increase to about 18 as I continue to mod. Oh and how much can a stock headgasket handle?

The stock turbo can do 300bhp all day long. 18psi, however, I doubt it. I'd try and find a slightly bigger one, but that's just me. The headgasket on the 7m can be a wee-bit of a problem, though. I would certainly replace mine if I were going to be running anything past stock boost. As stated before, if you're going to be running higher boost, you need to make sure your engine is up to handling it and you need to upgrade your injectors/intercooler. I extremely recommend getting a new headgasket if you're going to be running that high boost. As to BOVs... I really can't tell you much about them... I'll look around YouTube and see if I can't find something that sounds epic for you. Though, to be honest, a wastegate is safer for your engine. The BOV is more to save your turbo.

Any suggestios on turbos now? Also id like it to be a fairly direct bolt on.

http://www.youtube.com/watch?v=bUe3ODnUysM&NR=1

http://www.turbosmartonline.com/index.php?id=392

That's the only one that I could find that I actually liked.
Here's hoping? :x:

300WHP can be done with ease, but probably not as easy as you like. It's a commonly repeated recipe but you have to do things right or you might lose the engine.
If you plan to hit 18psi you might as well do a metal gasket now.
Follow this order:
fresh fluids, fix ALL leaks, check/replace all hoses (oil cooler too), check/replace head gasket, check/replace spark plugs & wires, check/replace timing belt, check/replace clutch, check/repair any codes. Then....
3" dp, 3" cat, 3" catback, air filter,
fuel pump, 1UZ KVAFM+ 550's+AFPR,
boost controller+ wideband gauge+ SAFC or something to trim with, intercooler and hard pipe kit,
57Trim Ct-26
stir, tune and serve. Serves 6 cylinders.
Should get you to the target. Although at 18psi you might be a bit higher.

That is asking alot from a stock ct26 don't you think?
Lexus 1UZ injectors are smaller almost 100cc's (remember no turbo). The boosted 1UZ guys are always looking for stock 7MGTE injectors if you want to sell your stockers. I would either get your stock injectors cleaned and re sized or suck it up and get the RC's.

As for choosing a turbo, I'd go with reading Garret TurboTech 101:
http://www.turbobygarrett.com/turbob...o_tech101.html
and Garret TurboTech 102:
http://www.turbobygarrett.com/turbob...o_tech102.html
and then looking through their product line:
http://www.turbobygarrett.com/turbob...ochargers.html
comparison sheet:
http://www.turbobygarrett.com/turbob...ison_sheet.htm

You really don't have to read the turbotech stuff, but it'll help you understand the dimensions of the turbos and the efficiency islands that they show.

If you still have questions about choosing one, I'll do my best to help tomorrow.

I would do this for you, but I feel like absolute s***.:(

How much boost can you get out of a stock ct26? And a 57 trim ct26?
Also I noticed on ebay there's a compressor upgrade. Any experience with these? Thanks for all the help!!!

I wouldn't go past 12psi with the stock turbo, but that's just me. I've no idea what type of boost is actually safe to run with it. Myself, I'd try to find a turbo with about a .85 A/R for lots of high-end, that you don't have to completely mash the throttle to get. That way it's still fun on the road, but you get good power and response on the track. I really know nothing about the 57 trim ct26, I just thought I'd throw in my thoughts. :crazy:

How much out of a ct26 with 57 trim

You may want to consider this turbo.
http://www.suprasport.com/BOSS-Sr-Se...rbo_p_756.html
I an early version of this turbo in my car. No issues.

Not to completely change the subject, but how's the customer service on that site? I found quite a bit of stuff that I'm interested in buying :drool:

When Jeff Montigny owned / ran SupraSport, the service was second to none.
The current staff does not offer the same quality service as Jeff did. However I have not had any major issues and when problems came up, they were resolved.
On a scale of 1 to 10, I give them a 7.

Does anyone know how much boost you can get out os a 57 trim ct26?

That is a question I would ask the supplier of the turbo. They would be able to tell you much more accurately what the max recommended pressure for their turbocharger would be.

Well, I ran what I believed to be the stock CT26 up at 11psi for just over a year (and the shaft already had more than spec'd play when I got the car with it's BHG). I expected it to last a few hundred miles before the smoke started but in the end it lasted over 10k miles & was still boosting strong & smoke-free when a failed BOV signal pipe that killed it in one fell swoop of surge...

That said looking at pics now I'm not so sure it was a stock supra CT26, compressor housing looks too big. :confused:

PSI doesn't mean all that much when it comes to turbo selection... Actually, it means very little. Think about the difference between a 6' tall industrial air compressor vs a small bicycle tire pump... both may be able to handle 150psi but the bike pump is going to have to work its ass off to fill the same size tank that the larger compressor could fill in a couple seconds.

Without getting into all of the specifics I'll just say that a CT-26 with an upgraded compressor will work quite well for what you want while maintaining a bolt-on setup and quick spool. 57 trim will run efficiently past 350RWHP.

Thanks very much!

Any one have anything to say about this t61?

http://www.cxracing.com/mm5/merchant...t_Code=TRB-T61

Just my two cents here, but I'd try to find one with about a .7-.8 A/R, ball bearing and (external) wastegate. Ball bearing turbos are more durable than journal bearings. That turbo is a fairly good size for street driving, though. It should spool up nice and quick. The only thing that's stopping me from liking it is the internal wastegate and not knowing who makes it.

- Other than that, for the horsepower you're wanting, it should do just fine.

I don't want to sound stupid, but what's the differenct between internal and external wastegate? I see a wastegate on both of them. Is the boost still adjustable? Thanks very. Much

Don't worry about feeling stupid; I'm stupid 70% out of the day. Anyhoo, external wastegates are more precise and more responsive. They're also easier to work on and provide slightly less backpressure, IIRC.

Also, internal wastegates CAN be tuned, but you can't tune them below a certain boost pressure. However, they can be tuned up by using a boost controller.

Okay, so there still good, just not for getting big numbers, and super precise tuning? One of my buddies has a t3 that he'd sell me for cheap. Anyone ever used one? Any recomindations?

Stay away from the CXRacing turbo.. I'm pretty sure it's the one that has a MASSIVE thread dedicated to it on SM... and all the shit-tons of custom machine work required to fix the flaws in the wastegate design and casting.. it's prone to shifting and the whole gate sliding... :eek2:

T3 again says absolutely NOTHING. It's just a partial form factor specification and tells you nothing with regard to the compressor and exducer. Also you'll need to check where it's going to sit in the engine bay (once you source a T3 compatible manifold for the 7M or have an adapter plate built). Unless it's a freebie I'd start looking it over for some numbers and start doing some research... otherwise you may end up throwing $200 to $500 in the trash for the manifold/adapter and oil lines (and possibly another couple hundred if you need an external wastegate).

As for the BOV, unless you've got electronics in place to tune around it you're probably going to end up taking it right back out... The engine stalling or backfiring when you shift or come to a stop is not all they say it is. ;) So, if you're set on the BOV plan on another couple hundred for a GOOD fuel controller (which isn't a bad idea anyway). The stock BOV or even one of the tougher Bosch BPV's sound great when vented to atmosphere... I actually recommend at least venting them into the intake right behind the air filter though in case it fails and sticks open.

Okay thanks for the good information!

So what4 do you think about a t66? From the reasearch I've done, its a direct bolt on...

And as far as a bov, I installed the maft pro.

Oh yeah... you're the one who's car isn't running right... My advice: Fix what you've got first. ;)

Second, You're running a MAF, unless you've got it setup as a blow-through setup (not the best way to go) you're still going to have the same issues with a BOV.

Third, pick up a copy of Maximum Boost by Corky Bell.

Turbonetics T66? You're going to have worse fuel cut issues than you already are unless you've got some decent fuel upgrades first (namely high flow pump and larger injectors). They're a very nice, responsive turbo though I've had a lot of fun working on a couple MKIII's with them. Honestly, you're going to be pushing it with a 57 trim upgraded CT-26 at anything above 9 psi or so without fuel upgrades... so you might as well stop window shopping until you get the prerequisites taken care of.

Anything to say about this turbo?

http://store.max-redline.com/servlet/-strse-543/Detail