Need help searching for a Turbo!!!

[Dirk-Slyder]

Hi,

I have a rev hard turbo manifold that has a T4 flange. I have been searching around to find the best turbo for my KA, but I got confused during this process. I was wondering what kind of specs should I be looking for. I have this in mind right now. T04s Turbo

T5/T6 COMPRESSOR WHEEL TRIMT5 COMPRESSOR WHEEL "S" Trim.60 AR RATIOCOMPRESSOR HOUSING A/R .60 TO4S STAGE 5 WHEEL

will I lag like a mofo with this? Should I search for a something smaller. I am willing to have some lag.

thanks

[candela]

hahah, thats a supra turbo at minimum...

To4S is big enough as is...Id be looking for a Q trim

[C-Kwik]

What are your goals?

[WDRacing]

http://store.yahoo.com/cheapturbo/garrettto4r.html

If your gonna go with a big TO4, then I'd use the above. With a 100shot of N2O your car would be an animal.

On a 2.0 (RB20DET) I was using a TO4E with an 60-1 compressor and an .81AR exhaust housing. I was building boost by 4700. The manifold was actually keeping me from flowing more in that case though. It was flanged for a T3 or T4, so the port was sized for a T3 but had a bolt pattern to accept both.

With the right manifold you'll be ok, yes you'll have lag, but it'll pull your teeth out on Boost.

What type of manifold are you using? Whats the car gonna be used for? Is your motor built for alot of boost.

If your only going to run a small amount of boost, say 15lbs or less, then I'd go with a TO4E with a .63 AR exhaust housing in whatever trim.

[Dirk-Slyder]

My goal is to get full boost from around 2500-5500 rpm at like 11 psi on a stock motor for now. I am willing to have some lag for top end power.

I have a rev hard manifold flanged for a T4, thats why I am looking for a T4 flanged turbo......is ssautochrome manifolds any good? it seems like their pipes aren't that thick. My friends SOHC manifold from ssautochrome cracked, I don't want that to happen. The car I am putting this on is a KA24de 91 240sx LE.

What is the meaning of "o", "s", "p" and etc letter trim. Can someone tell me what the letter on the trims mean?

is this good?

http://cgi.ebay.com/ebaymotors...33742

its cheap!!
Modified by Dirk-Slyder at 1:58 AM 10/16/2004

[WDRacing]

.96 AR ex housing is WAY to big. The lag will be awful. For 11lbs you don't want more then a .63 AR ex housing. Which in a TO4 will support 400whp when you get that far later on and still spool by 3500 or so.

[WDRacing]

http://store.yahoo.com/cheaptu....html

O trim with a .63 AR Exhaust housing....great turbo.

[WDRacing]

Damn, I just remembered, you need an on center exhaust housing with that manifold or it will hit the master cylinder. So anything in a .63 AR Ex housing with an on center not tangential

[WDRacing]

Make sure you get an on center type of exhaust housing though....the rest won't fit.

[Dirk-Slyder]

when looking at the pictures, how do you know which is an on center turbo and which is tangential

Since I have ABS, it iwll hit my master cylinder, can i have an adaptor plate made for a tangential turbo
Modified by Dirk-Slyder at 12:33 PM 10/16/2004

[TrunkMonkey]

when looking at the pictures, how do you know which is an on center turbo and which is tangential

on center - the turbine sits on top of the inlet.

tangential - the inlet is off to the side of the turbine.

-demetrius

*edit* the ebay turbo you listed is an on center.

[Dirk-Slyder]

thanks for the help:DemcjWDRacingC-Kwikcandela

You guys have been very helpful. Now I need to find an affordable good turbo. Here is my shopping list, am I missing anything that would keep my car from problems.

turbo manifold - $150wastegate - $150blow off vlave - $30intercooler - $180pipings - $200turbo - $injector 680cc - $400fuel pump - $greddy e-mange - $321.51greddy profec e-01 - $476downpipe - $exhuast - $

[candela]

i was jus trunning down this list again...

I really think you shoudl stay away from a T4. I mean there really is not any benefit to havin a T4 hotside on a street car KA since you are leaving a stock motor.

A nice t3/t4 settup (cheaper to boot) will yield much better street characteristics and will be able to take you to a level where you will need a built motor.

50 trim comp wheel in a TO4E housing with a T3 stage 3 wheel in a .63ar housing will give you fantastic streetability. commonly known as a 50trim t3/t4

[WDRacing]

He already has the rev hard mani though. The TO4E or B won't be to laggy if you keep the Ex AR down. Like I said .63 will work fine. C-kwik used to have the TO4B I believe. He never complained at all.

[candela]

to4B is old technology.. at least stick with an E housing. It will be laggy regardless when compared t a T3 hotside with a .63 or .48

That manifold can be sold just as fast as he bought it. I just think that for this guy, who is not going to build the motor and probably doesnt have turbo experience... that a T4 is a lil big.

[C-Kwik]

Lag is really quite relative. Most people have a poor understanding of lag as well. In fact so many have this as a criteria when asking which turbo to pick, and mostly just because of media hype. And most will lump both turbo response and boost threshold with little understanding of either concept. While they are related, they are very different and very from set-up to set-up. On any well chosen turbo, response will generally be quite good once you are beyond the boost threshold.

And yes, I was quite happy with th T04B. Though if I had decided to increase boost more, I probably would have tried to get my hands on a T04E-50.

[Dirk-Slyder]

OK so let me see if I can get this right

T04E.63 A/R on center exhaust housing

what compressor side size would be good?what size for the turbine wheel wheel be good?

What is the advantage about a V band?

[C-Kwik]

OK so let me see if I can get this right

T04E.63 A/R on center exhaust housing

what compressor side size would be good?what size for the turbine wheel wheel be good?

What is the advantage about a V band?

As far as I can tell, no 0.63 A/R exists on any T4 turbine housing. It does on a T3 Turbine, but there are no on-center T3 turbine housings that I know of.

As far as compressor and turbine wheel sizes, depends on your goals. There is no one magic turbo that will be good for every application. You MUST think about what your goals are.

V-Band has no distinct advantages as far as power is concerned. All it is is the type of connection to the downpipe and in some cases, the exhaust manifold. It is easier to swap out another turbo of the same configuaration is, offers positive sealing, and I believe it provides better relief for expansion than your typical flange joints (Not that you should rely on these for thermal expansion).

[WDRacing]

I swore the T4 came in .63

Whats the AR on your TO4B...or what was it I should say?

[candela]

to4b is a compressor housing...NO t4 comes with a .63 hotside like he said

and yes i guess if you are runnign low boost than a B is ok, but the E has its advantages even at low boost levels. Funny thing is, is usually noone runs tehse turbos in there most efficient boost pressures. Most of us KA guys run < 15psi

[Dirk-Slyder]

thanks for the help guys, I think I udnerstand about turbos a little bit more now

[C-Kwik]

I ran a .69 A/R with an O trim turbine wheel.

And neither my Turbonetics or Garret Catologs list a .63 turbine A/R for the T4's. Not to say it can't exists, I just haven't seen any available.

[Dirk-Slyder]

so .69 the closest thing to a .63?

All of the manifolds that I have seen for the KA24de are top mounted turbos, will all these manifolds make my turbo hit my MC unless i get a on center housing? Since T3 turbos don't make a on center housing whats my alternative?

[gabossie]

SSA makes a bottom mount manifold now, but quality is really yet to be determined. I believe WD had/has one on the way.

[C-Kwik]

I believe you can get the T4 on-center with a .58 A/R as well.