What do you think about this turbo?

[portisroads]

T3/TO4S hybrid, 60-compressor wheel w/ .63 A/RTial 40mm wastegate w/ .8bar spring. Sounds pretty good to me. What kind of boost do you think it could run?

[Unnatural]

What other supporting mods do you have done??? You'll definitely want bigger injectors, fuel pump, upgraded intercooler, a new exhaust manifold, etc... Do mind a little lag??~Brendan

[portisroads]

HKS down pipe, stainless dump tube for wastegate vented to atmosphere, Shorty downpipe with 2 o2 bungs welded in, K&N breather filter, 255 walbro fuel pump, k&n filter, cat back 3in titanium exhaust, stock sr injectors, smic, nextgear intake manifold gasket(getting it dynoed soon, makes pretty good difference), in the design process nextgear intake manifold.

[portisroads]

forgot to mention stainless steel equal length header

[MojoMan]

Just make sure you upgrade the injectors and Get a FMIC. Even at stock boost with that turbo your going to have more airflow and more power and will need the fuel. I would upgrade the maf as well.

[portisroads]

okay, thanks. Any ideas to where to find a good deal on a maf? I'm most likely not gonna run more than 10 pounds of boost for awhile. What hp rating/boost rating are the stock injectors good for? I have done a little research on fmic? What are some good ones? What about a custom ic? There is a really good autocross performance garage where I live that makes custom ones? I rode with a rx7 that had a custom one made, seemed really nice. Anything in particular to look for? Does size make a difference on spool time? I want something relatively quick to spool. I use this car to autocross, its also a daily driver though.

[timmybgood]

forgot to mention stainless steel equal length header

might want to get an exhaust manifold instead to put that turbo on

[Unnatural]

If you are using this car for autocross you might want to consider a turbo that is a bit smaller. I think you will see a fair amount of lag with that turbo. It's not HUGE but it's still relative large. If you were planning on going drag racing then I'd say go for it. But in an autocross situation you might want something smaller. That 60-trim compressor wheel will definitely flow some serious air and make good power at your planned 10psi. Your equal length tubular manifold should help reduce spool time a bit. If you want to spool it a little faster you could simply swap to a .48 A/R turbine housing and improve the low and mid range power at the expensive of some top end.

Like MojoMan said, upgrade the injectors and you're going to want an upgraded FMIC to cool the air and prevent detonation. In fact, running a turbo of that size through a relatively inefficient stock SMIC will just aggrevate the lag and detonation issue.

As far as intercooler kits look at the GReddy V or R and Blitz LM FMIC kits for the S13 and S14 Silvia/180SX's. You should be able to find these kits at many of the SR20 suppliers online such as Enjuku Racing, Heavy Throttle, etc. If you've got a good source for custom fabricated IC piping you can always go far a nice sized Spearco FMIC...excellent intercoolers.

Info on the GReddy I/C's

~Brendan

[portisroads]

Thanks, I'm not really worried about top end. I really appreciate the help.

[drift-sx]

it is possible to get a misfiring system which would eliminate that lag. but is so harsh on the engine.

[Nismo_Freak]

Misfiring systems are used for racing applications only for a reason. I HIGHLY suggest not using it for a street car unless you got the cash to replace turbos and everything else.

You can make about 260rwhp on stock injectors. After that your just asking for trouble. If your looking to just run a low boost application then I'd suggest 550cc injectors w/ a larger fuel rail, and a 300Z fuel filter. If your looking for boost levels over 20 psi then I'd opt for 740cc injectors.

Your gonna want to replace the AFM to a Z32 unit. Or perhaps switch to a MAP system utilizing an Haltech E11, E6K, or Microtech standalone.

You will obviously need a new exhaust manifold since the one you have now is for an internally wastegated turbo w/ a T25 garret flange. The new turbo has a T3 flange and is externally wastegated.

Downpipe has to be re-worked to fit. You can either install it to route the external wastegate line into the downpipe or you can run it open, aka screamer pipe (and it's loud as hell).

Intercooler is a given. The Blitz LM unit should suffice well, or the larger Trust kit. If your going for high boost then you should look into a Trust Skyline GTR core w/ custom piping.

Other items you might look into:1. Koyo 3 Core Radiator2. Tomei Metal Headgasket3. Rocker Arm Stoppers4. Cams, Valve Springs (your gonna want to rev higher)

[Unnatural]

Thanks, I'm not really worried about top end. I really appreciate the help.

Since you posted that turbo specifically, I assume that you've bought it already or can get it for a good deal. So if that is the turbo you are going to go with I think you'll like the .48 A/R turbine housing over the .63 A/R housing for quicker spool up. You can try Turbonetics for that housing if you'd like to try it. Like I said an equal length manifold should further help spool up because of the well balance runner flow into the turbine.

Your fuel system is the next concern. New injectors are a must. Like Nismo_Freak said, the stock 370cc injectors will go to about 260whp (I didn't know that), but you should be past that with all these mods. The T04S 60-trim compressor is going to flow a much larger volume of air at 10psi than the stock T25/T28's could ever hope to. If you do ever boost past 10psi, on purpose or accident, you going to detonate and kill the engine unless you do some fuel upgrades. If you don't want to go stand alone you should at minimum get a fuel controller of somekind; S-AFC, JWT ECU, etc. Also an adjustable fuel regulator would be nice with a new fuel rail to feed the new injectors. Once you get the fuel system dialed in you should notice further improved spool up.

I would definitely consider Nismo_Freak's other recommendations as well. The car will be a real killer when you get done with it! :thumbup

[portisroads]

Thanks, I really apreciate all the help. The engine I got already has this turbo on it. I guess I should take the injectors out to see what size they are? Maybe the previous owner got larger ones. I have about 700 to spend at the moment. I'm starting work again next week so I'll again have a steady flow of money. Do you think it will be safe to fun something like 7psi on it w/o messing up the engine?

[portisroads]

What do you guys think of this fuel regulator? http://cgi.ebay.com/ebaymotors...05543