APS TT or JWT TT?!?
Just wondering what the vote would be for since JWT is out! Throwing out the whole price difference...all in all, what would you go with if you could get either?
aps tt has the larger injectors and a more compehensive engine management unit. jwt tt is produced here and you'll probably receive better customer service. both kits are very nice and produce nice numbers out the box. because i rock the aps st, i'm partial to the aps tt. plus i heard that jwt just failed another attempt at carb cert. so that means you can only have the kit installed at two shops in the whole wide world, vrt in cali and performance factory in new york. if no lag is important, i would say go for the jwt kit. if that big number is your thing, go with the aps. i'm talking only if you get the standard jwt turbos, not the 700 heavy hitters. if you upgrade those, it's a whole different ball game. do the research for yourself and you'll see you can't go wrong either way.
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Originally Posted by Bullitproof
true, so true my friend. but i wasn't trying to start anything, just brainstorming on the pros and cons of each kit out loud i guess.
the more JWT's I see the more I likey. Those kits put out some serious tq numbers. Since you said not to factor in the price, I say get the JWT and buy any missing parts (fuel system and what ever esle the JWT doesn't have over the APS) to make it complete.
Originally Posted by booger
not to start an argument . But the aps is more avaliable , but can only be tuned at only a hand full places in the USA
Originally Posted by MRC Motorsports
All you need to tune Unichip is the unichip tuner cable and software.About $800, most shops "should" have these tools..
but the fact still remains, if the APS kits aren't installed by an APS dealer the warranty=byebye.
Originally Posted by chimmike
but the fact still remains, if the APS kits aren't installed by an APS dealer the warranty=byebye.
Though I am partial -- i.e., I already made my decision -- I would go with APS TT. They have a proven track record and still offer one of the most complete systems out there. The quality of the components is also beyond compare. I cannot speak for the JWT kit because I have not seen it in person, but you can't go wrong with APS.
The JWT kit is by far the best I have seen or driven, and I think the guys at VRT have proven that it is reliable. Look at all the number posted for this kit and you should not have any questions about which kit is the way to go.
COJ, your options with your location are pretty much limited to APS. Comparing full kit to a full kit, I'd say they are just about same out of the box. If you were to go over the facotry setting in either one, both would need extra stuff. APS is good for about 450whp, after that you'll need new injectors and EMS. With JWT, the stock injectors are maxed out with the out-of-the-box kit, so. But w/the turbo size APS TT has a greater hp potential. And when going for a high whp w/built motor an all, you'll probably have to run more boost on the JWT (with all the consequenses) to achieve it.
Keep in mind that the ultimate goal of the JWT was to be a CARB exempt turbo kit, and that was not the case for APS, so that puts a lot of constraints of JWT that APS is not hindered by.
Also, all JWT dyno charts look like the power curve begins to taper after about 5800 rpm, but it's not an issue for a street car, I am sure that you are not driving around bouncing off the limiter all the time.
Having said all that, despite the horrorr stories about the APS customer service, I would still use APS, but only if the installer would be able to address potential problems quickly.
Keep in mind that the ultimate goal of the JWT was to be a CARB exempt turbo kit, and that was not the case for APS, so that puts a lot of constraints of JWT that APS is not hindered by.
Also, all JWT dyno charts look like the power curve begins to taper after about 5800 rpm, but it's not an issue for a street car, I am sure that you are not driving around bouncing off the limiter all the time.
Having said all that, despite the horrorr stories about the APS customer service, I would still use APS, but only if the installer would be able to address potential problems quickly.
Taper off after 5800 yes... but it stays at a high level, like on that dyno run with 630 torque, it tapers off to above 450 torque... tell me you cannot live with 450 + torque lol. That and if you shift before red line it'll bring you right back into the powerband of the high torque to pull you through.
Also if you've read this thread https://my350z.com/forum/forced-induction/177764-vrt-jwt-quest-for-800-whp-daily-driver.html JWT kit seems to have the potential to hit 700 hp with replacing the turbos to a slightly larger one, with minimal sacrifice for lag. Also with the APS kit you need more than new injectors & ems, you need new actuators as well to hit higher than 450 hp because they're only good for 12psi.
They're both great kits, but if you're willing to wait awhile before making a decision and a JWT tuner kit happens to get released & be widely available while you wait, I'd go with the JWT kit. If you can't wait, then get the APS TT kit and get it installed at an APS authorized dealer.
Also if you've read this thread https://my350z.com/forum/forced-induction/177764-vrt-jwt-quest-for-800-whp-daily-driver.html JWT kit seems to have the potential to hit 700 hp with replacing the turbos to a slightly larger one, with minimal sacrifice for lag. Also with the APS kit you need more than new injectors & ems, you need new actuators as well to hit higher than 450 hp because they're only good for 12psi.
They're both great kits, but if you're willing to wait awhile before making a decision and a JWT tuner kit happens to get released & be widely available while you wait, I'd go with the JWT kit. If you can't wait, then get the APS TT kit and get it installed at an APS authorized dealer.
Last edited by ActionJackson; Mar 17, 2006 at 07:52 AM.
I was all set to get the APS TT until I read about the JWT TT kit.
I am going with the JWT TT kit if it gets Carb approval, because of the faster spool time(almost no detectible lag) and the charts I have seen show it starts producing more torque down low than the APS TT kit. Those are the most important characteristics for me.
The APS is a great kit in regards to that as well, however, most of the sources I have read say the JWT TT has the edge becuase of the smaller turbos. Since I don't have any plans on going over 400 rwhp, the smaller turbos are ideal for my goals.
If you want to go higher power numbers, then I would go with the APS TT, as it is more complete kit out of the box. The APS kit is also more available than the JWT kit, so if you need it now, that is a big factor.
I am going with the JWT TT kit if it gets Carb approval, because of the faster spool time(almost no detectible lag) and the charts I have seen show it starts producing more torque down low than the APS TT kit. Those are the most important characteristics for me.
The APS is a great kit in regards to that as well, however, most of the sources I have read say the JWT TT has the edge becuase of the smaller turbos. Since I don't have any plans on going over 400 rwhp, the smaller turbos are ideal for my goals.
If you want to go higher power numbers, then I would go with the APS TT, as it is more complete kit out of the box. The APS kit is also more available than the JWT kit, so if you need it now, that is a big factor.
Forget the APS....I have driven the JWT kit with smaller turbos and the larger ones. There is not a big difference between the two in terms of driveability or turbo lag. If you want the high HP then get the bigger turbos on the JWT. Realistically though at 12.5 PSI I have 504rwhp and 567rwtq. Tell me those aren't high numbers. The kit drives awesome and does very well on the track. That is the whole goal of VRT, build a track car. They have numerous cars that run VERY well at the track.
I do not know how many of these guys talking about APS have driven a JWT, but until you can drive them both you cannot compare. Also, like they said the track record for service is horrendous with APS and the fact that there are not that many installers/tuners for the APS is a drawback. I know right now the JWT is not readily available but it will be.
I truly think the only way to make this decision is to drive all the TT kits for yourself, because they ALL have pros and cons.
I do not know how many of these guys talking about APS have driven a JWT, but until you can drive them both you cannot compare. Also, like they said the track record for service is horrendous with APS and the fact that there are not that many installers/tuners for the APS is a drawback. I know right now the JWT is not readily available but it will be.
I truly think the only way to make this decision is to drive all the TT kits for yourself, because they ALL have pros and cons.



