Hey guys, I am currently N/A and have finally decided to pull the trigger on a TT Kit after looking at my options. I've narrowed it down to the APS and the Greddy TT kits.

My question to those of you who have the kits, what would you say the ups and downsides are to the respective kits? (I have searched and found a lot of reviews from people who are happy with their setups)

What I'm looking more into is I see a ton of people on the boards running the Greddy TT's with massive amounts of power, yet I hear APS turbos running out of breath near 500 and others saying it can pass 600 fairly easily?

I have access to both kits at the same respective price and am having a tough time trying to pull fact from fiction or just brand favor out of the picture and finally make the decision as I'm not partial to either particular kit just that I know I want it to be either of the two.

I'm not looking for anything wild, 400's I would be happy with, looking more for longevity and reliability then all out maxing out of power. Anyway if you guys could give me some insight to help me out, I would appreciate it greatly.

 

You answered your own question. You only want 400 and the only bad thing you've heard about the APS kit is that the turbo's are only good till mid 500. If the only difference is power levels you can't even safely reach on a stock block then either are good choices.

 

Some quick differences....

Greddy will go higher in power in the end than APS, but we have seen 600+whp from standard APS kits

APS spools slightly quicker

I prefer Greddy and EWG's to the APS design, especially in higher boost apps

APS turbos are BB and water cooled, but I havent seen one standard Greddy failure on the snails, its always the upgrades that crap out.

APS retains stock crash bar, Greddy does not.

I chose the Greddy, I have no regrets

 

if the kits are the same price, I would get the APS.

 

Thanks appreciate the post Alberto, just looking into the differences helps a bit.

Your car is pretty much **** that I show everybody when it comes to twin turbo Z's, and every little bit of info helps.

As I said earlier I'm looking into 400's, I may want to upgrade later, but I'm not looking at breaking any records. I just want something formidable, but drivable.

It's hard to find differences and strengths and weaknesses between the two because most of the threads I pulled up are. A > B because old turbos suck, or B < A because its out of the USA. Otherwise it's a completely happy review with no info on any sort of issue between them.

 

Any reason for feeling that way or just personal preference?

 

greddy pulls harder .....

 

Never understood why the Greddy's perform as well as they do... but the fact is they do. And it's not like APS turbos haven't gone bad before either. Between the two, I would also pick Greddy given the experience of the community thus far. Only thing a little worrisome is the recent Greddy parent corp bankruptcy issue... And the manifold cracking issue...

 

Given your goals, either would be just fine. I chose the Greddy due to the reviews I have seen on here. You say now you are satisfied with 400whp but let me warn you I said the same things as did many other people who are now much over that number. The power is addicting and you will always want more. Go with the power potential of the Greddy turbos.

 

Is the manifold cracking issue pretty prevalent? I haven't heard much about it, I've only seen a few people mention it, wasn't sure if there is a step that everyone has taken to prevent it.

As of right now it looks like I'm leaning more toward Greddy at this point, I appreciate the input.

 

I don't think you can go wrong with either kit. Chances are, your bank account will run out of money before either kit runs out of power. Once you cross appx 500-550rwhp there are many more parts to upgrade in order to have any reliability. I got the APS TT tuner kit because the price new is about the same as a used Greddy TT kit.

 

APS has better attention to detail. IMHO better quality parts and more complete. More oem-like -> keeping front impact beam for example

 

Ahh understood, so from a kit standpoint it is more OEM just from the overall package, I noticed it comes with a fuel system, pre programmed piggy back as well as an oil pan.

Whereis it seems the Greddy has the E-Manage which everyone throws away, injectors and no oil pan?

From a driving feel, since the turbos apparently spool a little faster does it give more of an OEM feel to the actual ride, or is it so close between the two it doesn't matter much?

 

Depends on the tune....

 

Just to throw another hat in the ring....may want to check out Powerlabs single turbo.

I have 360 DD at 6 PSI....the turbo itself will apparently spin upwards of 600+ hpr. I decided to jump on board with this kit when it came out, so far the kit itself seems to be doing well. I had the APS TT kit on my mind before....I like how each bank spins a turbo.

Whatever you decide, DON'T get a UTEC....spend the cash for a Haltech or F-Con. Not a very good EMS for FI considering the other options.

 

However, there are better options out there for fuel system and EMS now, so if I were to pick APS, I'd pick the tuner kit and get the other pieces independently (CJM RFS and Haltech).

I've only heard a couple instances with the cracked Greddy manifold also - if I were installing a new kit today, I'd reference those posts and get that spot reinforced since it was in the exact same location in the reports. Alternatively, engine dampener, thermal coating inside and out and using flex sections on the exhaust might help relieve stress on that part.

As others have said, both are decent kits, with a proven track record.

EDIT: forgot to add that I think a few have managed to install the Greddy intercooler AND KEEP the crash bar. Quadcam?

 

I would go APS, I like their FMIC design alot.

 

It is my understanding that the APS TT kits provide a very clean install and everything fits better than with the Greddy kits. I originally was going to go with APS, but switched to Greddy when I decided that I wanted to go for more power. Nonetheless, if I were looking for the hp numbers that you are looking for, I would go with APS.

 

Excellent and very fair post.

Like the others said, both kits are good kits with a proven record in the community. I don't think you could go wrong with choosing either one.

Another aesthetic consideration (if it's important to you)... Do you prefer the look of a horizontal flowing intercooler core (Greddy) or vertical flowing intercooler core (APS)?

 

I was looking into the Powerlab single since I do live in Arizona and I have seen it's potential, from an Install standpoint it looks to be a lot simpler with a ton less routing than the Twin Turbo kits.

Though I want something with minimal spool that has a very broad powerband with an overpowered stock feel to it. I can't say I've driven in a Powerlab car, but of the many single turbo cars I've been in the drivability seems to always follow the same pattern which feels somewhat chunky.

A couple of friends with semi large turbos in their Supras have awesome power output, but the spool and then the violent kick although impressive the first few times around just feels a little slow. I've spent a lot of time around some fairly high output factory twin turbo cars and even a Noble M400 and their powerband and overall drivability seem to be more on target with what I'm looking for.