Turbo on a G35

[The Maestro]

I'm looking at putting a turbocharger on a car, I'm trying to choose a good used car (in this case a 2003 G35 Sedan) to turbo with this model of turbocharger.

Now I have some questions before I decide this is going to be the one, since this is the first car I'm going to turbo and I don't know much about them:

Will this actually be 450 hp?Will I need to replace the transmission of an auto tran G35 with 50k+ miles on it?Will any other components need to be replaced in the drivetrain to accomodate the extra power?Is there a better turbocharger out there for this model car? I've been searching but there don't seem to be a whole lot of turbos available and this one looked pretty good.

[suby01]

from that link it looks like their talking about crank power not wheel power. since there is no way a stock g35 has 270 wheel horsepower. so that means that kit will give you 340 wheel power. i dont see why it wouldnt be possible.

[The Maestro]

So what would my mileage afterwards be? Would I need to replace any parts on the drivetrain other than the transmission (which I'm doing anyway)?

[tollboothwilley]

Transmission can actually handle 400whp. You should be ok for a while on stock transmission.

You will def. want a VB upgrade and you might decide just to build the whole transmission. SGP and GTM do a good job of both for the 5AT.

[The Maestro]

Could you tell me what all of the acronyms in the second paragraph mean?

[tollboothwilley]

5AT = 5 speed Auto TransmissionGTM = GT Motorsports http://www.gtmotorsports.com/SGP = SGP Racing http://sgpracing-store.stores.yahoo.net/VB = Valve Body (in auto transmission)

Most people start out with the stock transmission if they turbo

Eventually they build. The VB is pretty much a must because it will make the shifts happen much quicker, that way you aren't hitting the rev limiter all the time.

[The Maestro]

Could I get a 350Z M/T and replace the transmission on a G35? I read that they use the same transmission on the 2003 model year and want to confirm before I decided to sink a couple thousand into something like that.

[tollboothwilley]

350z and G35 tranmissions are the same.

Why not just get a G35 MT ??

The transmission swap is not a simple swap out. You have to change out the wiring harnesses and some other stuff. Its supposed to be pretty expensive.

I think people that have done it on the cheap end were into it $3000 for all stock stuff... The first few people that did it were into it like $8000 IIRC(if i recall correctly).

[The Maestro]

Because finding a 2003 model used with an M/T is impossible. In my area.

[joe603]

Swapping an AUTO for a 6MT will run about 10k to do it right. Twin turbos installed is another 10k.

[uprev]

2003 G35 Sedan has the older style ECU. 2004 G35 Sedan comes with the newer style ECU, 2004.5 G35 Sedan comes with Wideband O2 sensors also.

The VQ35DE (non revup) motor is usually only good for 380-400whp reliably. The revup version in the newer 05-06 is generally safe to around 450whp. You can go farther in power than that but your reliability suffers dramatically. Also to note, those numbers are not a guarantee of reliability, as each car is different and no used car is perfect. The general rule of thumb limits on these vehicles is mostly based on the stock piston/rod combination.

I would suggest working with a single vendor for your turbo kit, and if you go Automatic stick with them for the upgrades you'll need for it also.

GTM makes turbo kits for your car, and they can get you the parts you'll need for the transmission. You can also come down to Austin and have us do the work, and tuning for the car. We work very closely with GTM and we're more than able to do the work.

[tollboothwilley]

Why doesn't UpRev have support for the 2003? Would you get working on that please. I'm in desperate need of a tuning option.

[uprev]

Why doesn't UpRev have support for the 2003? Would you get working on that please. I'm in desperate need of a tuning option.

We do have tuning support for the 03 Coupe. There are hundreds of them on the road with Osiris tunes, even full twin turbo monsters.

The 03 Sedan has an older style ECU in it, so unless you re-wire the entire car to use the newer style ECU... I really have no idea why Infiniti did this.

[tollboothwilley]

Why doesn't Uprev have support for the older style ECU then? I'm sure its used on other vehicles right??

I'm assuming that Nissan wanted to expedite the G35 into the market and although they had intentions of a different ECU it probably wasn't ready.

[uprev]

Why doesn't Uprev have support for the older style ECU then? I'm sure its used on other vehicles right??

I'm assuming that Nissan wanted to expedite the G35 into the market and although they had intentions of a different ECU it probably wasn't ready.

Older style ECU is different, from the hardware it uses to the code it runs. The 03 Coupe has the newer style because it was designed from the ground up like the 350Z to be the car that it is. The early 03 Sedan however seems to be a last minute idea and used the older style ECU. Not quite sure why (maybe a lack of availability of the newer gen ECU?) but it is different including sensors.

The 03 Coupe though works fine with our software. 04.5 and newer is preferable though because of the wideband O2 sensor and the ability of the ECU to adjust the tune safely because of it.

[tollboothwilley]

What sensors are different with the ECU then?

I know that Technosquare has a reflash available for the 2003 sedans. Why are they the only ones to support?? I really wish someone else would...especially uprev.

It looks like for me to get a tune I would need to either send in my ECU to Techosquare or get a different ECU. In which case, do you know what else I would have to change with it?

[uprev]

What sensors are different with the ECU then?

I know that Technosquare has a reflash available for the 2003 sedans. Why are they the only ones to support?? I really wish someone else would...especially uprev.

It looks like for me to get a tune I would need to either send in my ECU to Techosquare or get a different ECU. In which case, do you know what else I would have to change with it?

Technosquare cannot flash the older style ECU either. They probably have it listed because they don't know any better. I really can't tell you other than that?

[cheapazz]

Check out Jim Wolf Technologies, They have a killer Twin Turbo setup. Down side is its $7000.

[tollboothwilley]

Technosquare cannot flash the older style ECU either. They probably have it listed because they don't know any better. I really can't tell you other than that?

I know several people that have been to Technosquare to have it flashed and they had no problems...they were early 2003's as well.

CheapAzz

Good to see you around and glad that you are finally going to put that Transgo reprogrammer on after such a long wait!!

What is the billet fuel rail going to do for you?NEver heard of people doing that one...

[cheapazz]

Makes it look pretty! The makers say it will increase hp but I just wanted a set of blue fuel rails. Might look good in your engbay too.

[tollboothwilley]

Send me a link. Under that upper/lower plenum you don't tend to see much fuel rail. With the Kinetix SSV I think you would see quite a bit though.

I'd still like to see

[cheapazz]

SEE!!!....there you go again TBW....puttin ideas into my head! Hmmm......SSV huh? Have to look into that a bit more. OUCH!!!!...the wife just hit me in the head......not allowed to spend more money currently. But if I ask real nice like.

[tollboothwilley]

That Kinetix SSV is expensive...but works REALLY well and is really shiny. You'd effectively be getting rid of both upper and lower plenum and spacer. I'm sure you could sell for a little extra change...but not likely to get 1/2 of what the SSV will cost you.

(It will show off those fuel rails and Valve covers really nice though... )