Hey guys,

I'm building a motor right now (8.5:1 compression) so it will soon be time to buy a FI kit. I've pretty made up my mind to go for a JWT 530BB TT Kit because I think it fits my needs perfectly but just to be sure I want to ask the gurus here what they think about my choice. I will give some info on my project.

This is my second 350Z (2003 Track) and even before I bought it I knew exactly what my plans were; turn it into a supercar without compromising on drivability or comfort.

Right I have the car pretty where I want it except for the extra power. This is my mod list: 19" Nismo LM GT4's, Falken F452 255/285, Nismo catback, HKS Hipermax III coilovers, Whiteline swaybars, Powergrid endlinks, StopTech rotors and Axxis ULT pads. The car looks, handles, stops and sounds great.

Okay now for the power part. I'm shooting for 450 RWHP with a minimum of 400 RWHP and a maximum of 500 RWHP. For me numbers are just numbers and what I really want is a car that can comfortably beat a Audi R8 V8 and can hold its own against a Gallardo or Audi R8 V10. So compared to most of you guys I'm lowballing on my power wishes (:

Ok back to my choice of FI kit. What I care most about is drivability (quick spoolup & traction), quality of the parts, ease of installation and reliability (as far as that is possible). I'm not so much interested in headroom for more power as I know for certain everything upwards of 400 RWHP will be enough for me. I rather have smaller turbo's with less lag.

What do you guys think, is the JWT 530BB TT Kit right for me?

Greetz from The Netherlands

 

The 530bb kit is good for the kind of power you mentioned but with a built block 500-550 would be what I would be shooting for so the 700bb kit would be better IMO. I had the 530bb kit and I have drove a car with the 700bb kit the difference is lag is not really noticeable. I would get the 700bb kit because power is like crack you always need more the price difference is minimal if you do the 700bb kit new but to upgrade the turbos later is costly....unless you are buying the kit used then I guess go with the 530bb kit either way they are nice kits.

 

I would recommend the jwt 700 kit (if you are thinking 530).

Lets face it, we all know we say "I want a max of xxx" but you will want a touch more later (its inevitable, trust me).

At the power levels you are already talking, the 530bb kit is done, maxed. And it isn't cheap to just upgrade to 700 turbos. I say just go to them to start.

Spool won't be hurt too much and you'll have much more potential.

Just my $.02

Tom

EDIT - Damn you Sylvan!!!! lol

 

hmmmz it does makes sense what you guys are saying but i wonder if that difference in lag is really that small...

 

For the small diff in lag IMO, the 700 kit is the way to go.

 

I agree...700bb would be best with your built motor.

BTW.....why did you pick the JWT kit? I am not saying any thing is wrong with it...because that was my first kit I started with.....just wanted to know if you have looked at other kits or is it the shop you are using that chose that for you?

 

Scenehouser - congrats on your decision to FI. Question for you - I haven't seen that many FI folks that have gone the JWT route. Most FI installs I've seen go with GTM or Greddy. Can I ask why you chose to go the JWT route? What specifically made you decide that JWT suited your need more than the other two vendors? Keep us posted on how your build goes.

 

Stock block, 530BB FTW
Built block, 700BB FTW

/EOF

 

at least we agree


It is not like he picked a Turbonetics kit or something the JWT is a top notch kit, if he choose either of those three kits he would not go wrong but from what I see on here JWT is the kit that has given the least amount of issues overall. You haven't been around much if you haven't seen very many JWT kits installed, Several of us on here run them. The reason there are less around is you need an authorized JWT installer to even get the kits so if you don't have one close by that leaves it out for an option.


The lag difference between 530 and 700 kits is NOT even noticeable, it seemed like about 300rpm difference in the waste gates opening if I recall right and at full throttle you have alot going on so it could be even less than that.

 

First off congrats on going F/I!!!
Secondly great choice in turbo kit !! I had the 530BB's on a stock block and now have the 700BB's on a built block.

For the HP level you will be reaching I would suggest you go with the 700BB's if you think you will want room to grow. Lag may be a small issue but you can minimize that with your choice of cams such as the JWT C2's .....may be worth a look.

Sorry to tell you but at the power level you will give a good run for the $$$$ but not be able to comfortably beat a Audi R8 V8, Gallardo or Audi R8 V10. Their top end will be a real problem. IMHO you will need between 600-650whp to really create havoc!!!


Good Luck!!!!!!!!

 

I'm glad i started this thread (: if so many people say the same thing there must be something to it..

Well my decision is not final but the JWT kit seems to be high quality and since I live in the Netherlands JWT is willing to sell me the kit without authorized installation so that is not an issue either.

 

Audi R8 V8 has 420 Hp at the crank...

Besides I'm not talking about the texas mile.. I mean in a 10 to 60 or 60 to 120 mph race.

 

Fixed - Your first sets of numers are too close together. If you build the motor, let it strech its legs. Have you ridden in an F/I Z or G with a TT and built motor.... driven like Alberto drives his?

Get the bigger kit like the others are saying. Everyone says they only want XXXwhp, then they catch a beating from a loudmouth with a faster car and then they wish they had the ability to just turn up the wick and retune. Trust me on this, once I got used to 20+lbs of boost, there was no going back to 12lbs.

 

Just an example for you - I'm running the 530 kit on a built motor (8.6cr w/ 262 cams, stock plenum, 440cc injectors, JWT FMU, HKS Fcon iS & Evo tt exhaust) @ 9psi. this setup makes 428 whp, 395 wtq on a dynopack. The power delivery is smooth, spools fast and I've never had a check engine light (not sure if emission testing is an issue in Netherlands).

For more power you'll need the 700 kit for sure plus engine managment and at least the JWT fuel system upgrades (http://www.jimwolftechnology.com/wol...UEL_SYSTEM.pdf).

Of course you'll need wider wheels and 305mm or wider rear tires.

Good luck with the build and post up your setup and numbers when you have them.

 

WRONG

500whp in a Z driven correctly should STOMP even a V-10 Audi. They are only trapping LOW 120's and if you cant go at least 125mph on 500whp you need to choose a different hobbie...like gardening.

I trapped 126mph letting off at 490whp

 

I see.....

When I first went FI with my G....I went with the 700bb.....As Cass has stated.....that could get old quickly. If I knew what I know now...I would have just went with the 850bb instead of wasting money upgrading....it's not much more lag than the 700bb IMO....Gord or Sylvan has the 850bb.

Also look at the Greddy and GTM kits....GTM has many different sizes.....I forgot how many.

If you are stuck on the 700bb......my advise is to go with the single IC ( Greddy).....yeah..the twin setup looks nice...but was very restrictive when I used it on my car.


I know Alberto already responded....but I think you are getting CHP and WHP mixed up......When I was using the 700bb....neither the Audi or Lambo had a chance....matter of fact no production car under 200k even came close at 60 to 130......I got beat bad by a built 911TT GT2 .....but a stock one would not have beaten me that bad. After I upgraded to the 850bb....I cleannnnned his clock.....60 to 130......80 to 140+......

I have asked him to race again with my twin GT35's and he admits it would be a waste of time.

550whp is no joke....and some on here under estimate what that power really means. That's the power range of a super car......look at the hp rating of the top Lambo, Enzo, Porsche, just to name a few......550 on any car makes it a lethal weapon!!!

 

well in that case you'll prolly want to go with twin gt3582s since its not much more lag over the 850BBs

 

You'll be at or near the limits at 500whp with the 530bb kit. I agree...go with the 700bb unless you already have the 530bb. The 530bb maxed out at about 460whp on our dyno....that's it. The turbos are technically rated for 530 CRANK hp for the pair.

 

.....that's my point also.....I should have just gone with the 35r to start IMO

 

850's lag like $hit compared to 700's, and IMO they never make up for it up top. At least in pump gas limits.