as title

 

I was just testing it out on mine tonight. I rolled on in 3rd at about 3000rpm and immediately made 3psi and by 3400 I was at full 8psi. Then I rolled on in 6th at 2000rpm and made 3psi by 2200rpm, but got off after that cause it was just too much load at that speed, plus it was 6th gear.

 

I would really like to see a dyno with the APS TT and JWT TT. I want to see when the two start building boost.

 

depends on the engine load...

 

^^^Exactly^^^

On my APS setup, I build boost REALLY fast. I reach 14 psi under 4K rpms

 

dude.. how much for the dumps

 

Sport Z magazine fall 2005 article has both dyno'ed, see article.

 

and it is fair to say, the article isn't all the great beyond the component comparison chart. The comparsion is weak at best

I mean the APS car ran kinetix cats and stealin exhaust

And who knows what exhaust setup the JWT ran???

On top of that, looking at the dyno charts/numbers don't really show much of difference:

 

1.Read what you posted, it says Nismo exhaust on JWT in the article.

2. Of course you dont find the comparision helpful if you cannot read the details such as which exhaust it has. Have you considered there is info there, you just have not studied it well enough to see it? In addition, if the dyno does not show much difference to you, maybe it is because the performance is not much different or is it you prefer one kit and you want data to reinforce what you like? Try breaking down hp/tq by RPM level in 500rpm increments and then you will see the difference in 6 kits tested.

3. Next time you blast someone, try doing something yourself for the Z community instead of being critical of someone that has made an effort to provide information to others. If you can do better, get 6 cars, test them yourself and post your findings & then lets see how you feel having someone making negative comments about your post. I do not apprecite negative statements and honestly, doing the article was more for helping people than pay. Writing articles on the side does not pay well, it is more for doing something for Z owners that do not have the time/resources to do it themselves. I work 10+ hours per day on my full time job. Writing this article as a side job took over 6 months of background work getting the 6 kits/cars at one place to get tested. To be blunt, you have no idea how much effort it takes to get 6 kit manufactures together and agree upon testing procedures etc. This is not just pull up on a saturday and pull a dyno run like a car owners. It is easy to be an armchair know it all, harder to do something yourself.

 

Just because you put in a ton of time and effort doesn't mean the result is all that helpful. I found the comparative chart helpful, however the written articles were not. The fact that they brought cars to you with differing boost levels, exhausts, trannies, and some with obvious issues discredits the article, not your efforts.

You want a pat on the back for a great effort, then you got it, way to go. If you want a pat on the back for attempting to make everykit on the market sound like a great option and not getting down to the important aspects of the kit, that you won't get.

I appreciate the effort and the comparison chart.

 

And yes I looked at the dynos and compared them. I did however miss the nismo exhaust on the top of the page - sorry.

In terms of the question at hand, I did reply that there isn't much of a difference when looking at the dyno charts of APS, JWT, and the greddy. Those are the main kits needed for a comparison. The others IMO are outsiders that do not directly compete with them for one reason or another

 

Here, I will plot out the numbers for you based on the dynos of the test. You say there is not much of a difference; I feel there is, specifically at lower rpm levels. You and all others can make up your own mind:

GReddy:
2000rpm = 101/270 hp/tq
2500rpm = 145/310 hp/tq
3000rpm = 212/369 hp/tq
3500rpm = 248/375 hp/tq
4000rpm = 295/385 hp/tq
4500rpm = 340/392 hp/tq
5000rpm = 374/391 hp/tq
5500rpm = 410/390 hp/tq
6000rpm = 428/370 hp/tq
6500rpm = 432/350 hp/tq

JWT:
2000rpm = 120/315 hp/tq
2500rpm = 175/362 hp/tq
3000rpm = 230/397 hp/tq
3500rpm = 292/430 hp/tq
4000rpm = 328/430 hp/tq
4500rpm = 370/430 hp/tq
5000rpm = 415/428 hp/tq
5500rpm = 428/390 hp/tq
6000rpm = 430/375 hp/tq
6500rpm = 430/345 hp/tq

APS:
2000rpm = 99/268 hp/tq
2500rpm = 152/318 hp/tq
3000rpm = 198/352 hp/tq
3500rpm = 238/374 hp/tq
4000rpm = 298/400 hp/tq
4500rpm = 330/384 hp/tq
5000rpm = 380/395 hp/tq
5500rpm = 398/380 hp/tq
6000rpm = 415/360 hp/tq
6500rpm = 400/325 hp/tq

To reinforce my point, as you can see, the peak numbers of hp/tq of the GReddy vs. JWT are within 3-5hp/tq HOWEVER if you look at their numbers at 3500rpm, the JWT kit has approximately 44hp more and 55lbs more torque. To me, that is a significant difference thus why I stated the JWT has "across the board hp/torque delivery". BTW, you seem so focused in different boost levels and mods so let’s talk about it. The JWT and GReddy kits were running 7.8 vs. 8.0 respectively (only .2 lbs difference). The GReddy was running no CATS while the JWT had stock ones.

So because one kit had no cats and was running .2 lbs boost more, is the test not useful? Well, to me, it is clear the JWT has greater power (close to being in stock kit configuration) than the GReddy at lower rpms. If you increased the boost .2 lbs or took off the cats of the JWT kit (which should give it more power), that still hold true thus why I wrote what I did. In other words, the variations in kit configuration as tested did not change the basic character of those kits, specifically in the area of strengths I mentioned in the article.

Now, as far as every kit being a great option, they just have different strengths (sorry, I am not into bashing anyone’s kit just like I prefer not to bash a person’s 350Z). I also mentioned how the GReddy kit could easily be transformed into a monster with some additional modifications. Here is the point, the JWT kit has smaller turbos and it performed with better numbers at lower rpm levels than the GReddy however, the GReddy kit has greater potential for big hp/tq if modded and high boost. I am not going to say which is "quote better" because it all depends on what your goals are for the kit. If you want 600+hp, GReddy has the ability to get it with the kit as is more so than the smaller turbo's of JWT that would have to be upgraded to reach those levels.

Again, all of this is in the article, you just have to read closely. I chose to look for the positives of each kit rather than point out the weaknesses of others. I highlighted the strengths of each kit but I guess for some, what they want is for me to explain the data rather than allowing a reader to do so and make a choice of which is the best kit for their goals. There is more then one winner, depending on what you are going to do with the kits.

Why should I say the Turbonetics is the winner because of ease of installation + more hp per buck, the JWT is the winner because it tested more hp/tq in a majority of the places within the rpm spectrum, or the GReddy is the winner because it performs well in stock form yet is capable of tons of hp when boosting high levels? They all do these things but maybe someone wants to spend less than $6000 for a turbo kit, then in that case, the Turbonetics kit is surely the winner and does perform very well. If a person is totally focused on big boost numbers from a kit, the GReddy surely does it so is it the winner?

 

Zland,

Very useful information, thank you.

It is very difficult to be objective in this situation. You and your publication do a great job at any rate without choosing favorites. As far as we are concerned, no kit is better than any other; they just have different aspects to appreciate. The end user can choose his most important features and benefits out of Price VS Torque VS High Boost and Horsepower. All kits can create power that is for sure. Yet it is hard to get any facts from suppliers for they all seem to be a little biased on what kit they like best based upon their own situations. A magazine can offer facts (and opinions) without being one sided. We appreciate your efforts as we are sure Greddy, Turbonetics, APS and JWT do as well.

At any rate, no matter what the user wants, at least on a stock motor, all must be concerned with good tuning and long-term reliability. The next few years will determine that winner. As far as we are concerned, many of the boost happy enthusiasts should take the focus off of what kit they are using and analyze if a built motor is a choice they must make if they desire huge power or insist on playing with their boost controller without High Octane Fuel.

Warmly,

 

Thanks for positive feedback.

I think sometimes it is percieved that attempting to be objective is somehow not being able to see differences when testing which is certainly not the case.

BTW, I got to get down to VRT and check you guys out in person since I live in Oceanside.

 

We are working on Ed's white G all this next week and should be on the dyno late next week.

Perhaps you can visit the dyno run?

 

Pm me a day before you dyno it, I might make it down. Btw, what kit is being installed?

 

I will. Thanks.

 

We will pm you, or I will call you Jeff. The kit being installed is a fully jet hot coated JWT TT kit. Should be interesting. BTW, We just made 532+whp and 626lb/tq (at 3850rpm's) with 14 psi. on a different customers car with the JWT TT kit this past thursday.


Scott @ VRT