What are the pros. and cons. of each? I was thinking about the single turbo being the better choice for me. Anybody mind giving their opinions?


PS: the single turbo kit and tt kit being from APS.

 

Are you planning on building your block? If yes, go TT.
I have a APS ST not installed yet. ST is best route to go if u want to stay in the 380-440whp range. Read the Forced Induction threads.

 

What does the amount of power you want to produce have to do with your decision to go single or twin turbo?

Respect
JET

 

Im leaning towards ST a bit more. I just cant seem to get any price quotes for the kit from the APS site

 

I think the prices are going to drop a bit. around 5300 i think but not sure. Right now its going for 5,900 for the ST.

 

hmmm that sounds a bit better than the TT price. Also taking into consideration that a ST will probably satisfy my hunger for power to a good extent. Thanks everyone

 

it depends on your expectations from the car.

if u want to build an autox star etc go with the aps ST and then swap its mighty gt35r turbo with an HKS tz04e or GT42r from garrett and shoot for 650-700 whp with a godly torque. that's what optionauto's car has in Japan. It had max speed like 190 mph if i'm not mistaken

 

One thing to consider on ST or TT is the spool up time. I have heard the TT can start producing some good boost as low as 1800 rpm while the ST is closer to 2500. (can anyone verify these numbers). If you aren't going to build your engine, and you don't have to worrry about CARB approval, that would be the only reason for going TT over ST.

 

I want to go FI on stock internals. How much boost could i safely run, and how much horse does anyone think i could put to the wheels with stock internals? Is it really necessary to build the engine if im only looking for like ~400 whp? Sorry for the q's but is it better to go TT or ST on stock internals? Thanks

 

if your goal is 400whp on stock internals, go st. i think tt's have more power potential, but are gonna cost more. is your'e looking at less than 420whp, save your money and go single turbo.

 

I can verify what you said about the spool up time between the two. I for one, HATE turbo lag of any kind, and after driving both and considering all the options, I would go with the TT over the ST all day long. Turbo lag sucks and is greatly minimized by going with a relatively small twin ball bearing turbo system over a single big, or medium size ST system. IMO, I would rather be super charged than have the lag and power limitations of a ST. Just my .2 cents

 

Where in florida are you? You can call Japtix 561-963-8700. They can hook you up with any kit you want and install and tune your Z. Any other questions you may want to ask just PM me.

 

Thanks for verfiying that Scott. I too am a big supercharger fan. I was all set for the Stillen stage 3, met everything I was looking for 320 - 340 rwhp would have been fine for me, and I love that it basically replicates the stock power curves(just higher). However, I am in Denver, so stock I am only 201 rwhp(with the altitude effect), and unfortunately the altitude also affects the SC boost, so most people up here are only getting 265 at the wheels after spending almost 8 grand on a stage 3 installed! OUCH!

That being said, I can't justify spending that much money for basically 25 more HP at the wheels that all you lucky people at sea level have on a stock Z.

So I have been doing research on turbo's like crazy. All I really need is about 350 rwhp(that would be a 75% jump from what I have now!), so an ST would definitely meet that need, but like you I hate the turbo lag, so will probably go TT even though it's way overkill power wise, but I think it will make it closer to the low end grunt that I was hoping to get out of an SC

I'm not trying to hijack the thread, but hopefully this explanation will help others going through this decision process too.

 

Thanks. Would ST be considered more reliable than TT at about 400whp on stock internals? Is it honestly a risk running a ST w/ about 400 whp on stock internals? because i'd rather not fry my Z. I know my q's are not very advanced haha but im learning. Peace

 

it all depends on the installation and tune, go to a reputable place. plenty of guys on the board know of reliable tuners/installers.

 

Now I am going with that ST because i do want power but not enough to make have to rebild the engine. Later up grade the turbo and have engine work done and then play with higher number.

 

Im near Fortlauderdale in the south FL area, whats the best shop to have an APS ST installed at?


BTW guys... I appreciate all the help!

 

What is a good shop in or around Atlanta.

 

just bc you stay below 400whp does not guarantee that your motor will stay in one piece. as we have witnessed, many ppl have blown their motors in the z with a turbo. dont think just bc you go a little lower in power you are completely safe.

with that said, i personally like single turbos. however given the v6 design of the z there is very little reason to go with an st. the tt is much better designed to take advantage of the 2 halves of the engine.

 

.......+1....I agree....