How about this turbo for the RB25?

[USRB25S13]

Hi. This i smy first post. I am from the States and I own a 240sx (180sx to you guys) I am waiting for my RB25DET clip to come in and I have done some research on the stock turbo performance. I found this highflow T3 turbo and was wondering how it matches up to the RB25DET engine. As you can see the compressor flow is 35lbs/min. That should be good for 350 hp. I don't know if any turbo rebuilders here in the states will know what to do with the stock RB25 turbo. Here is a link to the site that sells this turbo. he specs are listed there. I know it will problably take some fab but that's ok I ahve always made my own DP's on past turbo cars

http://store.yahoo.com/cheapturbo/gart3sup.html

[Steve]

I think that will be a little small for the RB25, a bit smaller than the stock turbo.

what sort of power are you after? Is this going to be a drift car, circuit, drag, street? or all of the above:D

Have a look at the GT28 series, they would give you a good midrange and top end. GT30s go well too.

[Steve]

And it may be worth doing a search, there is heaps of info on different turbos and their performance;)

[USRB25S13]

I have done a bit of searching here and I found alot of posts about turbo upgrades but most of the disscusion is on turbo's that I am don't know much about (Jappeness turbos) I just wanted to know how this turbo would stack up against the stock one. The car would be daily driven and I am looking to make around 300-350 HP (260-300 WHP) once all mods are in place. I figured replacing the turbo first would keep the car more reliable since the stock one car fail if over speed or detination happens.

I guess I could go with a T3/T4 with an internal wastegate. They are kinda rare since most people go with larger external wastegates. I would guess a T04E compressor with aleast a 50 trim and a .68 exhaust with a stage III wheel would do the trick.

[Steve]

Stock turbo should be able to support that sort of power reliably, no probs. Problems start when people start winding in too much boost, esp with the stock cooler, as it has a pretty huge pressure drop at higher rpm.

With a decent FMIC you shouldnt have any probs running 0.85bar boost(12.5psi), day in day out and easily be making around 270-280rwhp. Alot of guys on here run 1bar without dramas, but some do have dramas.

the stock turbo is not too bad for what it is.

If you are only chasing 260-300rwhp, why upgrade, really not necessary. If you want a bit more, have a look at BOOSTDs post on upgrade comp wheel and using a VG30 housing - I am sure they wouldnt be hard to find in US.

Just some ideas anyways. But seriously with the hp you are chasing you wont need to upgrade the turbo.

[Steve]

Oh and the reason I believe alot of people look at Jap turbos is because they have been making turbos for these engines for a long, long time and know what they are doing:)

[USRB25S13]

I think Jap turbos are some of the best quality turbos out there. They make really good power for there size. They just don't hve the same bang for buck that the old school American turbos have. You can pickup a T3/T4 turbo for around 550 new. Most HKS, Apex turbos start at over 1K and go up from there.

As for the VG30 turbo there was never any VG30DET powered cars in the US. Unless you are talking about the VG30ET from the older 300zx's. The only other turbo VG we got was the twin turbo 300zx. But from what you have said I think my money would be better invested in a good FMIC.

[EnricoPalazzo]

Well fo comparison, my Stock turboed R33 is making 183rwks which equates to 245whp. Now in USA ur Dyno Jet dynos read about 10-15% higher then ours so really for u that is 255-260whp.

When i install a FMIC and some other add ons (ECU and cam gear), i should hit +200rwks, ie 270whp here or around 300rwhp where u r.

So what im gettin at is that the Stock turbo will be fine for what u are wanting.

Cya

[Steve]

Originally posted by USRB25S13

..... The only other turbo VG we got was the twin turbo 300zx.

thats the one:)

Have a look at the thread BOOSTD posted about his $350 260rwkw turbo.

Originally posted by USRB25S13

But from what you have said I think my money would be better invested in a good FMIC.

Most definately, i had trouble giving my stock intercooler away ended up at the local rubbish dump.