Ultra Racing NZ 0 Report post Posted May 19, 2011 As the Title states here's a CLUB SPECIAL for you all & a lot of words for you to read ( actually a worth while read) I realise not many members will have a use for this BUT there may be a few A couple of facts about the GFB Atomic single stage Boost Controller. 1: They will NEVER Boost Spike 2: They will NEVER Boost Spike 3: They come in Black ONLY The GFB Atomic will NEVER cause boost spike on your car!!! this is due to the fact they are NOT the run of the mill "Ball & Spring" design that every other manufacturer makes. Ball & Springs boost taps are the common style tap/bleed valve you'll find on the market, unfortunately they have been the reason behind many blown engines & shattered turbos for the simply reason that 99.9999% of them allow boost spike to occur. HOW a BALL & SPRING Boost Tap works: These controllers still use a bleed, but the most common technique is to place a steel ball behind the restrictor hole, held shut by a spring. The main problem with this technique is that since the restrictor hole is so critical to boost, placing a free-floating ball behind it adversely affects its performance. Because the ball is free-floating, it can act like a pea in a referee’s whistle, fluttering around in the restrictor hole. This then causes boost fluctuations, and (if the spring is set incorrectly) boost spikes & BANG!!! This will NEVER happen with the GFB Atomic as GFB use a "Tapered Brass Needle" which allows an accurate and consistant level of boost to be maintained. HOW a BLEED TYPE BOOST TAP works: GFB boost controllers are all bleed-style, which uses a restrictor (a small precision hole in the pressure inlet nipple) and a taper needle adjustment. The restrictor plays a very important role, which must not be underestimated. Basically, without the restrictor, the adjustment needle would not be able to bleed off enough air to lower the pressure reaching the wastegate actuator. The turbo is pumping more than enough air to overcome such a small bleed. By placing a restrictor in the flow path, with the bleed on the other side, the air cannot pass fast enough to overcome the bleed, therefore the pressure will drop at the actuator and boost will rise. This explains why if you install the controller backwards, you will not be able to raise the boost. The diameter of the restrictor hole is very critical, and the wrong size can affect spool-up, or cause boost spikes. GFB has spent a lot of time and development ensuring the restrictor is optimum, and the RESULTS SHOW. Simply aye BUT considering their Australians we didn't expect much else, hehe, ( just kidding GFB you may talk funny but you're an awesome bunch) ;D And this is the reason why many well respected NZ Dyno Tuners hold these in stock and regularly use them while tuning, they know what's good and what's not. Anyway enough rambling here's a SPECIAL that will temp you to tell porkies to the missus (can you still say missus in 2011?, lol) as to where that money went that she was saving up for a new pair of shoes RRP $99 + $5 FREIGHT - Try $84 Delivered, Your choice of Black , Black or you guessed it............ Black. Share this post Link to post Share on other sites
