I have saved up finally enough money to buy an APS turbo kit, but what do you guys prefer a single or twin? I already have a crawford plenum, APS testpipes, custom true dual exhuast. My question is that if I purchase a single turbo will it fit with a true dual exhaust? and how do i maintain a turbo
so it will last a long time?

 

With either kits, its best to have an APS dealer install it or if your planning to install it yourself, make sure theres an authorized unichip tuner in your area. With all your extra mods ( plenum, testpipes, etc), it will run lean out of box. Your exhaust will need a custom reverse y-pipe if your going with the APS ST. TT kit is about $1500 more, and $1500-2000 more for install. The ST is probably more safer on your stock motor. I recommend reading the FI section on my350z and 350zmotoring forums for more info on either kits.

 

With improvements in turbo technology (or at least the tech making it into more turbos), it would seem the need for twin-turbos has greatly diminished over the years. I know there's a certain cool-factor in having twin-turbos, but you can find a turbo that's easy to live with and has exceptional spool characteristics, making a single-turbo kit a very good thing.

FWIW, the G already encounters traction problems as is. A little lag wouldn't be a bad thing. Of course, these days a good, modern turbo design isn't going to have a buch of lag anyway.

Splitting the load between turbos isn't that much of a benefit to the turbo either, as the G isn't going to be seeing the boost levels that most single turbos are capable of.

For simplicity's sake, I'd say go with the single-turbo kit. For the cool factor, a twin-turbo kit.

 

Go APS TT or TN single! For the price of the TN you cant go wrong!

 

aps tt

 

If you just have enough money for a turbo kit then get the TN single. If you have plans in the next 6 months to build a motor get the APS TT. Reason I say this is because if you have the money to build a motor in that time then it stands within reason you have the discretionary income to put the time and money that it will take to build a "monster". If you are looking to get by with the least money spent go with the TN single. I've spent over $40k in all and in hindsight I would have just gotten the TN single and enjoyed it. It halls *** but is only on the road half the year. Not a big deal to me but if this is your only car then get the TN single because it is the least likely IMHO to screw anything up. I like a flashed ecu over a piggyback for longevity.

 

How much is the TN single?

 

If you have the funds I would say go straight to the APS intercooled twin turbo system. This way you will make an easy 400 WHP very safely and the twin turbo system has plenty of head room for over 500 WHP without any more funds being spent other than a custom tune (forged rods and pistons recommeded for 500 WHP aplications).

Single turbos are an excellent low budget approach for approx 400 WHP though imho the single turbo system is well and truly maxed out in the low 400 WHP area, better to go straight to twins and have the extra power potential in hand should you ever wish to join the 500 + WHP club.

Your true dual exhaust will fit with a twin turbo system though you will need a reverese Y pipe to connect to a single turbo system.

With watercooled turbos the only real issue to ensure long service life is clean engine oil supply, I'd recommend that you change engine oil every 3000 miles, hope this helps.

James

 

Has APS corrected the smoking problems on their turbos? Last time we checked the APS turbos are not designed to handle anywhere near 60psi of oil pressure and yet the VQ motor sees oil pressure from 15psi to 100psi. This was confirmed by David a while back and we were assured APs wass "looking into it" and never heard anything thereafter. A typical APS response was " thats odd, we never experienced that".

 

The Garrett GT series turbochargers in the APS twin turbo system have been super reliable when fitted by competent shops with the correct oil volume and drain hoses installed as per APS specs.

James

 

SO your saying the Oil problem dozens of APS owners nation wide experienced must be install related?

 

what better way to get an answer than directly from the manufacturer of these two kits? seems like a pretty straight forward answer to me.

yes, there have been several posts regarding smoking issues as well as other "problems" with both the ST and TT. is this expected? you would hope not, but it happens.

APS has worked with my installer, who happens to be authorized by APS, and provided him the most up to date products for the ST system.

post *EDITED*

 

Yes and they are here to help! I sure hope no one else thinks any other way! I hate how they were booted off of my350z. They did nothing but help those that had questions about the system. It really sux when $ gets in the way of helping others.

 

You are correct.APS is here to help...Help themselves sell their products I was just asking a question about their smoking issues since we never got a response, thats all..

 

the wonderful world of editing

PS- granted, i have only had my car for a day...i shouldn't even be writing this.

but I have no smoking issue and to my knowledge, neither do the any of the APS cars that leave Scott Performance. with that said, the concerns of "overfilling" the oil and flooding the turbo doesn't happen with these cars. APS recommends filling to the "L" on the dipstick. I have been told, by my installer, to fill it to between the "H" and "L", which I believe is about 6-6.5 qts.

those who do have issues will post. those who do not, will prolly not post. so gauging how widespread this problem is by just reading through forums is a bit misleading.

i'll leave it at that. I hope you get your issues resolved.