nevermind. i see the link above...id sell my z in a heartbeat for a fx like that blue one...so sick

 

http://www.infinitiscene.com/forum/s...ghlight=rookie

 

If you're not planning on big boost (>10psi) something with more low end grunt like the JWT 530BB might be more fun to drive. I have GT25r's (similar to the 530BB kit) and can hit 6psi by 2k. 300 ft/lbs at the wheels by 2.3k, and pretty much zero lag above 3k. Full stock drivability at almost any RPM, just push gas and go with almost 2x the HP.

Bigger kits like the 700BB are more designed for built blocks and will be more laggy with normal driving...they don't start making power until at least 3.5 - 4kk or so from all the charts I've seen.

 

Ahhh - exactly what I'm aiming for. When I started reading up I thought I could possibly tune back a larger turbo. But I have since been turbo educated and understand the compressor flow requirements for particular WHP goals.

I think your setup satisfies exactly my goals and performs better in the lower end of the powerband, which is exactly what I want. So, can you tell me if you picked a kit or did you customize the peices? Having gone through it, would you do anything different?

 

As I'm talking to a few different shops, one of the more reputable ones suggested I keep the stock ECU and re-tune for FI maps, using Uprev after I have a turbo kit installed. Since I'm going for stock internals and low boost it sounds like it could work. I've just never heard of this and was wondering if the forum has any comments or experience?

 

uprev is up and coming here and seems to be doing a great job for low boost applications...id say go for it if it is available to you..not just the flash though the actual dyno tune

 

Think I have settled on going with the Haltech EMS, stock internals, single turbo, custom set-up. I'm going to stay away from kits made for the 350Z because of the packaging restrictions they deal with. I think I can do a lot better with less pressure drop to my intercooler.

Had a baseline tune done (after bolt-on mods). Damn good improvements from a tune.

First pull was to run a baseline. This was my first Dyno ever, so the baseline was done with all my previous modifications in action. The car pulled 226 whp. My mods got me up to 226 from whatever stock was, but then comes the tune.

Rev limiter was raised (not removed) and speed limiter removed. He adjusted all my fuel maps for increases in power and torque across the band. Adjustments to AFR and the cam timing were made over about an hour and a half, followed by pulls to read out and confirm the new data. My FX responded by increases in power and torque across the board - it's obvious to me it's running better. Acceleration feels more free, as if I just made the car 500 lbs lighter.

Baseline - 226 whp and 217 wtq
217 wtq @ 4820 rpm

After tune - 246 whp and 255 wtq
255 wtq @ 2760 rpm

Here's the dyno sheet:

 

dont go turbonetics whatever you do...if u plan on a haltech and single turbo i actually think the powerlab tuner kit may be good for you..what are you tuning with now?

 

Currently tuning the VQ's stock ECU using UpRev.

I was thinking I would stay away from kits packaged for other platforms since my FX has TONS more space in front of the engine.

The intercooler will have to be placed differently in my FX which means all the intercooler piping from a 350Z or G35 kit would be useless at that point.

Placement of the turbo doesn't need to be tucked up under the engine and I also want to pipe the wastegate outlet back into the exhaust to control noise. It's enough custom work to justify starting from scratch.

 

this is all for a stock block build right...why would u go with haltech if u already have uprev which would be fine for u n/a or boosted? many people are running uprev with boost and it is very good..i honestly would say better suited for your build than a haltech which i would say is a little overkill for you..I see what u are saying on piping and all though..hope all works out for ya..

 

Thanks! Yes, it's a stock build at this point. I wouldn't have any problems with staying with the stock ECU and using UpRev, but I also need to go with what my local shops can support. I have three shops with good reputations to choose from and none of them have experience with tuning a VQ stock ECU with boost. Would prefer to stay local, of course.

 

I was under the impression any shop with the uprev license for tuning and is a uprev pro tuner is supposed to be able to tune n/a or boost..I think you should look into that a little more as u already have uprev and wouldnt have to buy another ems..Just my 2 cents..Where are you located again?

 

http://www.uprev.com/dealers.php

the most uprev tuners i have seen anywhere out of TX....and i could swear i have already seen jtran do a G35 boosted with uprev

 

Well it looks like you were right - this is directly from Jtran himself -

"yes its something we can handle. Reason being for the haltech setup is to tune off of speed density based instead of maf base. any car on haltech that we have tuned run exactly like stock and have the realibility of the stock setup. the haltech takes over control of all ignition controls, cam control, fueling, closed loop functions, boost by speed, everything."

Since my setup would be considered a low boost application, I don't see any reason to tune off speed density rather than MAF. Wow - this makes the whole project easier and cheaper.

 

^^^yezzir..i say u will be just fine staying with uprev and save some coin..
I am tuned off maf also as well as many others

 

Got advice from a guy I know that runs a shop in Australia:

"Ok well having 3.5 litres engine capacity you can really get away with a quite large turbocharger without causing too much lag. I would recommend a garrett gt3582r with the largest 1.06 rear housing. It will be on boost by around 2500rpm at the latest, more than likely closer to 2000rpm. As for wastegates there is a lot more to it than just the size of the gate, positioning is critical to get good results, a well placed 38mm gate will work better than a poorly placed 60mm gate. Being a v6 engine you will have 2 separate sides of the manifold coming into 1 at the turbo collector, it is easier to have a single 38mm wastegate on each bank of the manifold rather than use a bigger single gate trying to feed of both banks. So my recommendation is a single gt3582r with twin 38mm tial wastegates and make sure your fabricator puts the gates in a good spot that gets a lot of flow ie. on the external radius of a bend AFTER the collector so all cylinders have a good chance of venting."

I'm thinking that's actually a bigger turbo than I really need as it will make up to 25psi no problem. Since I'm aiming for 8-10psi, I wonder if I can go smaller and get full boost even before 2000rpm. High rpm boost and top speed are not nearly as important as low end for my goals.

 

Finally getting into details! Model numbers and sizing finally taking shape.

Walbro 255 fuel pump
OEM GTR fuel injectors
Haltec EMS
-add Wideband
-add IAT
-add boost control
Tial MVS 38mm wastegate
Tial Q Series 50mm BOV
Garrett 3076R turbo
Tial .63 SS turbo exhaust housing (maybe .82)
intercooler
custom ceramic coated piping all around
V-bands on hot side
silicone couplers & clamps on cold side
heat shielding

The general position of the turbo will go where my Stillen CAI is currently.

Downpipe will be routed beside the engine on the driver side to a Y-pipe feeding each cat.

Need to look at possibly removing the front engine tie brace as well as re-routing one coolant hose to keep it away from the turbo.

BOV and wastegate placement will be using a Y on a bend for good flow. Plenty of room to work with in the FX engine bay.

 

his rpm ranges are way off. a single 3076 is a waste of money as its too small, esp if you do a .63. Normal TT kits use 2 of those 3076s. I wouldnt use anything smaller than a gt35.

A single gt35 will spool around 3200 rpms. Maybe a single 16g would spool at 2000 rpms LOL.

 

Definitely doing the .82 exhaust housing. Looking for hole shot and low end, not top speed or high end.

When you say the 3076 is too small - what is the driving impact? What will a turbo that is too small feel like inside the car?

 

So the turbo size was changed after several conversations going like this thread was going.

Educated and convinced to go with a GT35 with 44mm wastegate & Tial exhaust housing.

Using the 350Z plug& play Haltec Platinum ECU with add on goodies.

Everything is on order and paid for.