This is arguable. Many will argue that for REALLY big power, the ST is the only way to go. At this time the only people that have built high whp ST Zs haven't released any information to the community. I'm looking forward to when we finally have some forum members pushing big whp on big ST's.

 

How about the real answer to this question is to find a shop that knows what they are doing.

 

I have yet to see a ST put out 700+ whp... I've seen several TT kits so far so those that say for REALLY big power ST is the way to go, they're misinformed. Rewording that quote would be something like this "for Really big power, ST is more costly than a TT to achieve & less adept at giving more power."

 

back on topic though. Out of the box I'd probably get the turbonetics... I don't trust the Greddy kit out of the box even with stock boost given its tendencies to go boom. Sure you can make it safe but that means spending another 1-2k over what you'd spend on the turbonetics kit. Why not the APS TT if you're going to throw around TT kits?

 

Thanks, smart ***. This only shows that you have no clue what you're talking about. Let me explain to you why this is said...

We're looking for BIG power here, so you're going to be upping the boost with a twin turbo setup. Once those two smaller twin turbos max out and pass peak efficiency, your only option is to upgrade to larger turbos. At this point you're starting to run into a common enemy among imports - displacement. You're pushing two large turbos with 3 cylinders each on a 3.5l motor. Your power gains past a certain threshold will be diminishing unless you stroke the motor or swap it out. Twin turbos are perfect for building power down low and building faster low to mid-range power, but they will never move enough air on the top end to hang, max power wise, with a single large turbo.

This is where a large single turbo shines. Now you're spooling one larger turbo on ALL 6 cylinders of your 3.5l motor. A single, larger turbo is much more efficient at moving large cfms of air, and will also pull harder through the top end of the power band. A single larger turbo is also cheaper and easier to swap out, and also easier to size for max efficiency. The trade off here is obviously lag and higher boost threshold, but this is becoming less and less of a factor with new technology and ball bearing turbos. BUT, we're looking for BIG power here, remember? If you want max power the single turbo is the way to go. If you want streetability and a quick car on the track, the TT might be what you're looking for.

Now, actually building a vq35 to handle insane amounts of power is a different story. But, that will come in time. The aftermarket is still young.

 

Ok you are correct on that but the problem here is that we Z/G owners is that we cant put big single's like the supra's can becouse r engine bay is to tight thats why the TT are best for r cars to build power i would have gone with a big single if their was one but their isnt and atleast we greddy guys have an option to upgrade turbo's.

I know that the new tnetics is a bigger turbo i know you guys will be passing 600 rwhp with that new set-up. But with the Z/G ill stick to twins until something like the injected performance comes out.

 

There is quite a bit of extra space up front where the turbo is located on the Turbonetics kit. The Injected performance turbo locates it in the exact same spot except they have modified the front cross member of the car to allow for a larger turbo. I know that someone on this forum has already fit a T70 turbo into the car, and I'm sure someone can go larger. With twins you also run into space issues until you go with long tube manifolds like SFR has done.

 

Yea but we are talking about custom kits the supras are like 2 to 3k to upgrade ours would easily be like 5 to 6k to start a project like that. Injected performance was thinking about doing that kit but they said it was going to be like 15 k atleast thats a alot of money if you think about it.

 

I noticed that this is your answer to everyone looking to go FI however I think it is only partially true. You can find a shop any day of the week that will give you their opinion, but if you aren't knowledgeable enough to know what is truly correct you can easily be mislead. The idea on the forums is to get everyone with both kits to give their opinions and then make a proper decision based on what may fit your needs. Once you know all that get to a reputable installation shop and have them do the work. There are very few reputable shops out there that will not be bias towards what they carry. Sure you could argue that all people who own a certain kit will be biased towards that kit as well but the idea is that there many people with each kit so you still get the exposure and the pros and cons of all the kits. Its all about the business in the end with certain shops and for those that aren't knowledgable enough, it could prove to be a very bad idea....which is why the forums provide such valuable information to us all.

 

I knew it would turn into a ST vs. TT debate. Who cares. The twins are good past 700hp....If you plan on going past that then maybe you should look into a huge single turbo and expect sick lag. And I'm sure if you want to go past 700hp, you have the time/money to know what you want to go with. I think this guy just wants to have something out of the box with the most power. Coming from a greddy owner, I probably woulda went with the ST (kuz of cost). Actually, you should take a ride in both cars and find out which one you like best. Then find out how much power you want and make your decision from there.