Twin Turbo?
Thread Starter
Registered User
Joined: Jul 2006
Posts: 7
Likes: 0
From: Reading, Pennsylvania
Twin Turbo?
Hi everyone i was thinkin about puttin a greddy twinturbo in my z. Has anyone had any problems with theres or heard of the z not bein able to handle the upgrade. Let me know if u have any good info. much appreciated!
umm i think you posted this in the wrong section...the Force Induction section will help you out more, but ive herd of a lot of engines blowing due to excessive boost without strengthening the internals
Hey Runngun21,
I moved this to the FI section for you, hopefully you will get some constructive replies, but I just wanted to mention that the kit you're investigating has been around for a few years now, and there are tens of thousands of posts about it on this forum, all just waiting to serve you. Check out the search function and see what you can find (I can almost guarantee you can't ask a question that isn't already answered in the archives somewhere), but if you need something specific and search doesn't dig it up for you, then ask the community. The most knowledgeable guys in the community are here, and they can definitely help you out.
Good luck, and welcome to the forum!
I moved this to the FI section for you, hopefully you will get some constructive replies, but I just wanted to mention that the kit you're investigating has been around for a few years now, and there are tens of thousands of posts about it on this forum, all just waiting to serve you. Check out the search function and see what you can find (I can almost guarantee you can't ask a question that isn't already answered in the archives somewhere), but if you need something specific and search doesn't dig it up for you, then ask the community. The most knowledgeable guys in the community are here, and they can definitely help you out.
Good luck, and welcome to the forum!
the greddy kit is a great kit nice power down low and high. Many say that it is a tunner kit though. Most likly you have looked at prices but make sure you check to see if it comes with a intercooler. other things you may need to buy are Feul Mang. Injectors, BOV, Clutch. and a good tune. there are other alteratives like single turbo set ups or even superchargers. Check around the F.I forum and see what suits you the best as far as power. you may find out you may want to go with a cheaper rout. I on the other hand wanted a single turbo and after research ended up getting a twin turbo set up.
Trending Topics
Originally Posted by Quamen
I would definitly search for each of these turbo kits prior to buying any of them. I would also most definitly not rely on this thread because you are using to few of replies to make a huge decision. You need to search for them and read up on every one that you consider a viable option so that you have a true outlook on what each kits strong points and weaknesses are.
My advice, I would either buy some rods and pistons and have them put in or I would stay somewhere under 450whp. Right between 410 and 420 seems to be a sweet spot for a bunch of the members on this board.
Regarding the turbo kits that you have as options:
Greddy:
This kit seems to have huge power potential when it comes to the stock turbos. Capable of 600whp and if you get them rebuilt (contact people such as Sharif at Forged) they can go even higher in power. This kit is not an out of the box kit though. This means that you will need tuning for sure. I believe that you also have to buy the blow off valve for this kit.
JWT:
This kit seems to be an amazing kit. Little lag and decent power capabilities. I do not know a whole lot about this kit because very few people have really gotten the kit due to the ongoing search for CARB Cert. From what I have heard it has good quality. I am not to familiar with what it uses for fuel/timing management.
APS:
Very complete kit. The main problem with this kit is that it takes an APS certified shop to tune it. I have seen some fairly big numbers from this kit (bigbri +700whp). However this was with upgraded forged actuators for the internal wastegates on the turbos. Some have said that the problem with the APS kit is that it is overengineered meaning that it is great out of the box but it does not always react well to changes in the system. Many have complained about smoke issues and how hard it is to get replacement parts. Keep in mind that there is a million reasons there could be smoke.
TN:
Nice single turbo kit that is affordable. Has different levels so you can buy the kit that is designed to meet your needs and desired power level. More options for tuners as any tuner can for the most part tune the kit. Although you would think that it would have a ton of lag based on the piping route there has been few complaints if any (can't read every post lol).
Overall, there are a few things I would like to point out. You are fairly concerned with lag it would seem. I think that the "no lag" statement for the JWT may be misleading in that it shouldnt be the deciding factor in what kit you go with. I had a custom turbo kit on my car that had some fairly long piping to the hot side of the turbo and was using a Turbonetics T70 turbo which is a huge turbo. I noticed very little lag on my car to say the least. I think that lag may be a bit over emphasized in order to sell certain kits. Although the Greddy kit comes with fairly large turbos I rarely hear someone complain about lag if ever.
Overall I would look at a few different things. As long as you are getting it tuned each kit is more than capable of meeting your specified horsepower goals. However, I am extremely surprised that AAM would not suggest a fuel return system to you. I would make that a must. Fuel is just one of those things that you are just better off doing right the first time because if you blow your engine, trust me, you will get a fuel system the second time around or whatever it is that you shortcut.
If you get the JWT I would put a BOV on it. The BOV is used to reduce or eliminate compressor "surge" or air trying to flow back through the turbo during periods when the throttle is closed such as shifting. If you do go with the JWT, maybe look into getting a set of Greddy or Turbonetics injectors that come with their kits. There is a large number of members who buy either one of those kits and just gets larger injectors from the get go never bothering to install the injectors that came with the kit. It is a cheap option as compered to injectors such as RC Engineering injectors.
Overall, no matter what kit you get, the key to successfully boosting a Z is not the kit (aside from things such as the fuel system at higher power levels like you seek), it is the tuner. Tuning the Z is no easy thing to do as the stock ECU likes to make things complicated. Make sure that your tuner knows what they are doing (AAM does obviously).
I learned the hard way lol. If you have any questions feel free to PM me. Just don't go and get the JWT kit because of a few replies. I would also suggest that you stay away from calling up the actual manufacturers and asking them as obviously they want to promote their product. This forum is a huge library with nearly everything you need to make the right decision. Just take the time and look it up. Nothing against AAM because I have dealt with them and they are great, but I would not rely soley on what they say because they are obviously a business and will to a point try to sell you what they have. Other people's good and bad experiences will be your best friend.
My advice, I would either buy some rods and pistons and have them put in or I would stay somewhere under 450whp. Right between 410 and 420 seems to be a sweet spot for a bunch of the members on this board.
Regarding the turbo kits that you have as options:
Greddy:
This kit seems to have huge power potential when it comes to the stock turbos. Capable of 600whp and if you get them rebuilt (contact people such as Sharif at Forged) they can go even higher in power. This kit is not an out of the box kit though. This means that you will need tuning for sure. I believe that you also have to buy the blow off valve for this kit.
JWT:
This kit seems to be an amazing kit. Little lag and decent power capabilities. I do not know a whole lot about this kit because very few people have really gotten the kit due to the ongoing search for CARB Cert. From what I have heard it has good quality. I am not to familiar with what it uses for fuel/timing management.
APS:
Very complete kit. The main problem with this kit is that it takes an APS certified shop to tune it. I have seen some fairly big numbers from this kit (bigbri +700whp). However this was with upgraded forged actuators for the internal wastegates on the turbos. Some have said that the problem with the APS kit is that it is overengineered meaning that it is great out of the box but it does not always react well to changes in the system. Many have complained about smoke issues and how hard it is to get replacement parts. Keep in mind that there is a million reasons there could be smoke.
TN:
Nice single turbo kit that is affordable. Has different levels so you can buy the kit that is designed to meet your needs and desired power level. More options for tuners as any tuner can for the most part tune the kit. Although you would think that it would have a ton of lag based on the piping route there has been few complaints if any (can't read every post lol).
Overall, there are a few things I would like to point out. You are fairly concerned with lag it would seem. I think that the "no lag" statement for the JWT may be misleading in that it shouldnt be the deciding factor in what kit you go with. I had a custom turbo kit on my car that had some fairly long piping to the hot side of the turbo and was using a Turbonetics T70 turbo which is a huge turbo. I noticed very little lag on my car to say the least. I think that lag may be a bit over emphasized in order to sell certain kits. Although the Greddy kit comes with fairly large turbos I rarely hear someone complain about lag if ever.
Overall I would look at a few different things. As long as you are getting it tuned each kit is more than capable of meeting your specified horsepower goals. However, I am extremely surprised that AAM would not suggest a fuel return system to you. I would make that a must. Fuel is just one of those things that you are just better off doing right the first time because if you blow your engine, trust me, you will get a fuel system the second time around or whatever it is that you shortcut.
If you get the JWT I would put a BOV on it. The BOV is used to reduce or eliminate compressor "surge" or air trying to flow back through the turbo during periods when the throttle is closed such as shifting. If you do go with the JWT, maybe look into getting a set of Greddy or Turbonetics injectors that come with their kits. There is a large number of members who buy either one of those kits and just gets larger injectors from the get go never bothering to install the injectors that came with the kit. It is a cheap option as compered to injectors such as RC Engineering injectors.
Overall, no matter what kit you get, the key to successfully boosting a Z is not the kit (aside from things such as the fuel system at higher power levels like you seek), it is the tuner. Tuning the Z is no easy thing to do as the stock ECU likes to make things complicated. Make sure that your tuner knows what they are doing (AAM does obviously).
I learned the hard way lol. If you have any questions feel free to PM me. Just don't go and get the JWT kit because of a few replies. I would also suggest that you stay away from calling up the actual manufacturers and asking them as obviously they want to promote their product. This forum is a huge library with nearly everything you need to make the right decision. Just take the time and look it up. Nothing against AAM because I have dealt with them and they are great, but I would not rely soley on what they say because they are obviously a business and will to a point try to sell you what they have. Other people's good and bad experiences will be your best friend.
+1
Boosting your car involves so much thought and research up front. And the funny thing is that no matter what you plan out for initially, you're bound to alter your setup ideas after all the dust settles.
Be cautious about what you read in forums. Everyone has different experiences based on what setup they went with. So just like a manufacturer or tuning shop, you're bound to get a lot of input that could be biased. I have yet to see 2 guys on this board with an identical setup. That in mind, treat everything you read as advice, not gospel.
My advice personally would be to define a budget FIRST. From there, you can determine what the best options are that provide you with a complete package. Out of the box FI setups are designed to work with your factory car, but even manufacturers like GReddy, Stillen, and APS offer several complimenting components that balance the new found power that your car will be producing. Ensure that you work supporting mods into your budget up front. Dropping all of your money on power and realizing that you need a clutch/brakes/suspension/different emu/fuel solution/etc... can be a painful realization if you're not ready for it in the initial planning stages.
Single vs. twin turbo setups has been a debate on this forum for quite a while, and some will argue their case until death, but I would say that it really boils down to how far you intend to take your setup. Twins will ultimately have a higher ceiling for power gains on the VQ, but generally cost substantially more than any single setup. Twins are also more complicated to install, which in turn relates to the cost of an install if you're having it done. Again, budget... If your intent is to create a 500-800whp monster, then you absolutely must look into engine internals. Mid to low 400's seem to be the sweet spot on the stock motor, and we've even seen engines go at that point...
In any case, enjoy the adventure (although it can get frustrating...) and keep in mind that owning a force fed VQ is one of the most exhilarating experiences that you can have, no matter how you get there
Boosting your car involves so much thought and research up front. And the funny thing is that no matter what you plan out for initially, you're bound to alter your setup ideas after all the dust settles.
Be cautious about what you read in forums. Everyone has different experiences based on what setup they went with. So just like a manufacturer or tuning shop, you're bound to get a lot of input that could be biased. I have yet to see 2 guys on this board with an identical setup. That in mind, treat everything you read as advice, not gospel.
My advice personally would be to define a budget FIRST. From there, you can determine what the best options are that provide you with a complete package. Out of the box FI setups are designed to work with your factory car, but even manufacturers like GReddy, Stillen, and APS offer several complimenting components that balance the new found power that your car will be producing. Ensure that you work supporting mods into your budget up front. Dropping all of your money on power and realizing that you need a clutch/brakes/suspension/different emu/fuel solution/etc... can be a painful realization if you're not ready for it in the initial planning stages.
Single vs. twin turbo setups has been a debate on this forum for quite a while, and some will argue their case until death, but I would say that it really boils down to how far you intend to take your setup. Twins will ultimately have a higher ceiling for power gains on the VQ, but generally cost substantially more than any single setup. Twins are also more complicated to install, which in turn relates to the cost of an install if you're having it done. Again, budget... If your intent is to create a 500-800whp monster, then you absolutely must look into engine internals. Mid to low 400's seem to be the sweet spot on the stock motor, and we've even seen engines go at that point...
In any case, enjoy the adventure (although it can get frustrating...) and keep in mind that owning a force fed VQ is one of the most exhilarating experiences that you can have, no matter how you get there
Last edited by TENGAI; Jul 20, 2006 at 05:52 AM.