Ok, I am confused as to what to do (i'm just planning right now though). I've talked to Peter through pm's and he told me that my goal was easily reachable with the APS TT kit and APS tallboy plenum (along with some internal mods that I told him I planned about). So, right now I am open to any turbo kit as long as it will reach my goals. My goals are in my signature but just in case someone doesn't have sig.'s enabled:
450 - 550 rwhp and 450 - 550rwtq for daily driving.
Have a setting on whatever module I use to turn the psi up on the turbo system to run 650rwhp and 650rwtq for worthy runs/drag track.

Those numbers are general, there is a 30 hp range down and up for each number (i.e. 450 can be 420 or 480). So what would someone suggest for me to reach these goals? I know some turbo kits require different exhaust parts (the Turbonetics piping is weird, so i'm not sure how it would sound). I'm open to any fuel/ecu management (Motec, HKS, Greddy). I was going to get Z1 Motorsports to do the install and tuning, this depends on which turbo kit and fuel/ecu management though.

Planned internal parts:
Crower rods
JE (would have to be custom)/SGP Racing/Arias/XT pistons (really doesn't matter I guess)
Darton M.I.D. Sleeve Kit
Ferrea valves, valve springs, valve retainers (considering SGP Racing titanium valve retainers, sgp racing valves, and jwt valve springs if they are cheaper than the custom Ferrea, or if the Ferrea's aren't worth it, or maybe JUN if they come out before I get valvetrain stuff)
Tomei 264 Camshafts
SGP Racing/ARP head and main studs

Tranny:
Exedy Twin-Disc Clutch and Flywheel
considering ATS though.
B&M Racing or Topspeed short shifter
considering changing gearing, maybe lower, maybe higher

Other:
Nismo Low-Temp. Thermostat
Blitz Radiator
New Plenum (brand depends on turbo kit)
I-M-Racing Grounding Kit
Unorthodox Racing Underdrive Pulley's
NGK Iridium 1-Step Colder Spark Plugs
Samco cooling hose kit
Stillen exhaust and Unlimited Tuning (if the turbo kit will fit up to them)

I've got plenty of time, i'm hoping to get a turbo kit this winter '05 or spring '06, i'm installing rods and pistons at the same time. I'll probably have the Tomei cams before then and I know i'll have some other mods before then. Anyway, whatever help I can get is greatly appreciated as I am very confused.

 

look into the Ultimate Racing TT kit, you will like it

link: http://www.ultimate-racing.com

Az

 

I'll take that into consideration, thanks.

I'm open to doing a custom turbo kit as well (single or twin).

Bump for more suggestions.

 

Add to that list: Driveshaft Shop Level 5 Rear Axle (800hp)

Bump...

 

Custom turbo is out of the question now.

My options are:
GReddy
APS
SSR/SFR
JWT
Power Enterprise
Unlimited Racing

And I believe those are all. BTW, why isn't anyone using the TurboXS tuner?

ECU Management:
MoTeC M600
HKS F-Con V-Pro
TurboXS
GReddy E-Manage
Unichip
Other?

 

On the tuner I would go with the:

[1] E-manage for now with all the extras (i.e. Ignition harness with dieods, Profec E-01 boost controller, Profac E-01 external signal harness).... or

[2] Motec, if you can find someone that can wire it up... or

[3] the HKS F-Con, and I have it on last just because it has some issues or bugs.

You can also add the AEM unit (if it comes out for the z)

Az

 

the TXS Tuner is not engine management, its a widebnd and datalogger

 

Oh.

Well, i've decided with help of other member's to go with the APS TT kit and get the APS tallboy plenum (with stock injectors mounted in it) later on, and I will be able to reach my goals easily with that kit. Now the wait, hope my stocks go well this year!

 

Good choice and good luck with your stocks

Az

 

Thanks and thanks for your help. I can't wait to get that Exedy clutch and flywheel, I should be getting it in June or so .

 

If you are doing more than a few thousand miles per year you may need to change the Crank and Main bearings...


Cheers



Paul

 

I think the APS kits are the best and most complete out there for our 350Zs. Among other things, it seems to me their fuel system is the best thought out. Someone correct me if I am wrong, but I think APS is the only kit out there that has a return fuel line as part of the standard kit. The fuel system is very important. The current issue of Sport Z magazine has an interview with the crew chief of the Performance Nissan 350Z Grand Am team. He jumped right on the fuel system as the biggest problem for More Power over the stock level. He mentioned a fuel return system as part of the needed upgrades for consistency of fuel supply. I have spoken to some other VQ engine builders of reknown and the first thing out of their mouths is the inadequacy of the stock fuel system and most of the forced induction kits out there.

The APS twin turbo is the clearly superior of the APS kits for our 350Zs, but if your budget is a problem, APS plans to release a single turbo May '05 that will also meet most of your power goals. At least it will meet all your initial daily driving street power goals of 450 to 550 wheel hp. Peter of APS has mentioned that the singel turbo is capable of 650 crank HP. (I notice that in your signature that your 10 year plan is for 650 hp to the wheels so the single turbo won't quite do that.) The spool up and throttle response will not be as near instantaneous as the APS twin turbo, but early reports has it as very impressive in its own right. It has a bigger turbo but one less turbos so... It will be less expensive by $2000 to $2500 (one less turbo and associated plumbing) and also less expensive to install, but reports are that all the guality and technology in the EMS and fuel systems, etc., will be there just like the APS TT. I think either of these kits will make our 350Zs pull like at Atlas booster so you can't go wrong either way. Just my 2 cents.

Upon reading your initial post again, I see that you want at least 650 hp to the wheels for track use even at the beginning so you better go TT on second thought. But the single is a viable option for people like me that can't quite afford the TT, but can get most of, but not all of, the TT performance.

 

The UR kit comes with a fuel system a bit better than the APS. If I list every part on my TT kit, then you can understand why I see its an excellent kit.

Az

 

Thanks for the info. I just read a reply from MIAPLAYA to my post on another thread that APS uses a fuel return port not line. He said it uses a FPR and dumps the excess directly back into the tank. It's not a fuel rail return; it's returned at the pump per this post.

How do you rate your kit compared to the APS twin turbo kit overall?

 

Yes the APS fuel system is like that but the UR uses a return line and I like that better than the APS because the FRP is located after the fuel rail.

I will list a few items that are included in both TT kits and you be the judge of which one is better, because it all depends on what you want (HP level and what RPM level do you want to have the most efficiency):

Intercooler: both kits uses bar and fin (same size) intercooler cores and both retain the reinforcement bar. And both transfer the air from bottom up, however the UR kit does not have any type of coating of the intercooler.

Waste gate: the APS uses an internal waste gate (32mm), however the UR kit uses an external waste gate (HKS 40mm)

Manifold: The APS kit uses a cast iron manifold with 6 studs connecting it to the cylinder head, and the UR kit uses a heavy gauge steel turbo manifold, which is bolted on the cylinder head by 12 studs.

Piping: Both kits have equal length pipes. The APS system uses polished pipes that change just a bit is size is some areas (the pipes coming out of the turbos) plus the lengthy silicone hose that goes out from the intercooler to the TB pipe. The UR kit also uses polished stainless steel pips that are 2.5” all the way till the “Y” pips which is 3” all the way into the intercooler and out to the TB.

Cooling: The UR kit uses a slim line fans to accommodate the “Y” intercooler pipe, which flows more air than the OEM fans. APS use the OEM fan.

Oil return line: In the APS system the oil is returned in the lower oil pan, however the UR has a port drilled in the upper oil pan, which returns the oil above the oil level in the pan.

Tuning: the APS uses a engine management system that can only be tuned by a dealer, however, the UR kit uses the GReddy e-manage that can be tuned by anyone and is widely used be others.

That’s what comes to mind

Az

 

Your kit is very impressive. Thanks for the info. I'm going with a single turbo due to budgetary constraints. Do you think APS makes the best single turbo kit for our 350Zs? (I don't think UR makes a single turbo kit do they?)

 

At first I would have told you to get the Greddy kit but the kit I like the most now is the SSR Engineering kit.

 

From our own engineering and testing there's little to no benefit in returning the fuel directly from the fuel rail to the fuel tank over returning the fuel at the tank as APS has engineered, both fuel return approaches yeild the near identical result.

Do you mean bar and plate or tube and fin style intercooler? The APS Intercooler core is manufactured in bar and plate style.


The nissan cyl head has only 6 retaining studs/bolts on each cyl head so I don't follow how the fabricated manifold can be located by 12 mounting studs?


The important issue here is the amount of pressure drop across the entire intercooler system, not just the size or routing of the pipes. In most if not all cases the intercooler core and end tanks is what creates the largest pressure drop.

Are you sure that the slim line fans flow more airflow than the OEM fans, I'd bet it's the other way around from past experience.

The APS TT system returns the turbos supply oil to the APS high volume air cooled oil pan ABOVE engine oil level.

The APS engine management maps the ignition timing (advance or retard ignition timing) across the engines entire rpm range and in all throttle contions, a must for any FI engine if engine durability is considered important.


In addition the APS TT system utilises the latest Garrett dual ball bearing turbos which provide much quicker spooling and far greater turbo durability than old design sleeve bearing turbos.

There may be many more differences between the two products though I have just clarified the points that I thought needed some clarification.

Thanks

Peter

 

Thanks and You are welcome UR is currently working on a single turbo kit.

Az

 

As I have mentioned I like to have the FPR after the fuel rail. Having the setup like yours “might” result in a drop in pressure.

Yes, bar and plate. Both kits use bar and plate

The Nissan cylinder heads have 4 studs locations for every port!! Thus 3x4=12 for each side. And of course the kit comes with new studs

Check and see:
https://my350z.com/forum/attachment....postid=1218966

I agree

Yes On this subject, what is the flow rate of the OEM fans?

So in that case the oil level will never be higher than the lower oil pan under all conditions? If you ask me, I like to be on the safe side

GReddy e-manage does the same thing. But I was talking about the ability to tune yourself rather than going to a dealer to do it for you. I’m sure that there are tuners out there that are not “Unchip dealers” who can perform equal if not better tune than a “Unchip dealer” on the 350z

The Ultimate Racing kit uses a Ball Bearing Garrett turbos. And yes they are very nice But I would say that compression maps are totally different, hence, the end user or customer must decide on the ultimate level of torque wanting to attain before buying the kit, in order to accomplish that level.

Yes I agree, there are more differences between both kits. For example I like my hose fittings to use AN style fittings when ever possible and I also like the use of T-bolts rather than the normal hose clamps.

Thank you,

Az