ya I'm not too familiar with all the details. I plan on going FI in about a year. What kits are most popular and how much gains? Also is a BOV only for FI or can you put one on an NA?

 

Right now everyone is on the APS bandwangon. I would just do the research and decide on your own which kit you want and not what everyone else tells you. Before you choose a kit you need to have a plan.....how much whp do you want? Then choose the kit. As far as BOV, they are only for FI cars.

Go to my350z.com and read up in the Forced Induction section as there is a lot more technical info than this site.

 

A blow-off valve is used in turbo cars. In the simplest of terms, when you jump off the throttle in a turbocharged car that is on boost, the 'door' slams shut in the boosted air's face. Normally, that air would run into the 'door' and be sent shuddering backwards. This isn't the best of things for your engine. A blow-off valve allows that pressurized air to be vented into the atmosphere instead of hitting the 'door'. The whistle or *Pfffftoo* sound you hear is the vented air pressure. Again, that's a very simplified explanation.

You can install one on a NA car, but it would serve no practical purpose and would only give the impression (to the uninitiated) that you are running a turbo.

IMO, it's always better to be faster than you look. Looking/sounding fast, without the ability to back it up, only sets you up for repeated embarrassment.

As far as TT kits go, you will find some variance around here based upon what people are running. The Greddy kit, while not producing as much out-of-the-box power as some of the others, seems to be a pretty safe route to go. Again, people's opinion on TT kits is going to vary a good deal. Depends on what your priorities are.

 

they are used on supercharged cars too...I have one. PPPSSSHHHHHHHHH

 

The APS TT is coming with 8.5 to 11 psi out of the box. Greddy comes with 5.6psi so naturally the APS TT is going to make more power out of the box.

I would hardly say Greddy is the safety out of the box. The Greddy is not as complete as the APS TT, but you can certainly buy all the parts needed and make the kit as complete and better (AAM fuel return is better than APS fuel system).

 

My bad. 'Cars with forced-induction' would have been more appropriate.

The number of BOVs to hit the market in the past 10 years is ridiculous. I never had a problem with the tried-and-true Greddy Type-S BOV.

And as for the Greddy Kit's safety, I'm speaking in terms of the level of tune and out-of-the-box boost level. Their emphasis seems to be on a reliable package, at the expense of the highest increase in output.

 

I will have to disagree with you on this. APS TT or APS ST is the safety out of the box.

 

You should run a bov so you don't have compressor surge. You should just recirculate it so you don't have idling issues/running rich in between shifts (backfires). You won't get that huge whooosh noise but it will make the car run a lot smoother. My favorite one is the HKS SSQV.

Oh yeah I don't think you can put one a NA car because I don't see how you would get that much pressure to open that valve on the bov.

 

Tomato!!

So there's two systems for you to look at that seem to be reliable thus far. You might search for people who've had problems with either system to help in your choice... ...but compare apples to apples... ...meaning that you really should only take into account the out-of-the-box system applications and not someone who's cranked the boost up. Too many other factors come into play when you start running more boost than the kit was designed to support, the biggest of which is the user's knowledge and preperation for increased boost (or lack thereof).

 

Do yourself a favor and search this site as well as my350z.com

There has been tons of discussions about this and a river of knowledge/experience waiting...

 

Do you need one for your vortec randy, or is it just for sound?

 

The Vortech is a centrifugal supercharger so it has pressure much like a turbo
Seeing how a BOV can release any unwanted pressure as well help get rid of compression surge, it's probably does help...not just for noise although I miss the BOV dearly...The VQ note does make up for it some though