Alrighty, so you're looking for 450whp and are currently using pump fuel. You'll need something like 750cc at 4bar to achieve this. A better idea, though, is to increase the octane with race fuel or water/alcohol injection and use a smaller injector that's easier to control. WAI costs more up front and but race fuel will rob you blind after a few tanks. (If you'd like to discuss WAI's merits, btw, I'll be happy to hash it out separately.)
Anyway, increasing your octane will also allow you to run an injector that's better matched to your engine. On that note, your SARD-brand injectors are ideal for an engine with a single intake valve because they spray a very narrow stream much like the now unloved Bosch "greentop" 440cc. Since they're low-impedance, they can open/shut faster than the greens which is great. However -as you've experienced -their wicked speed is still not enough to allow you to tune a clean and steady idle. Spray pattern is *that* important.
|Quote, originally posted by VW_NUTTER_ECOSSE »|
|The Genesis 550cc injectors... (snip) These are advanced - how? - so I run with a 4 bar FPR and we're talking around 600cc with as close to stock spray as possible.. |
The Genesis 550cc (click above) are slightly modded Bosch EV-14 (which are Bosch's latest technology). Run them at 4bar and they'll flow 635cc. They have the exact same spray pattern as stock 1.8T injectors, have faster response times, take high fuel pressures in stride, and produce more finely atomized fuel than any previous generation. All that translates to more power, sharper throttle response, lower emissions, cleaner idle, easier tuning, etc.
The old-tech parts that we see in stock VR6, 2.0l 8v, AEB 1.8T, and all Digifant-injected cars are designated by Bosch as "EV-1".
Then, there are the EV-6 and EV-12 (e.g. TT225) generations in between.
|These drop into stock rail?|
Yes, the Genesis 550cc fit directly in all 1.8T engines that originally came with EV-12 injectors. The AEB is the one 1.8T that we got here in the States that takes the EV-1, so these 550s won't fit AEB's without running new seats/bungs.
|Why the.. |
Is this needed for 1.8T too? Confused
The adaptors are required because the Genesis 550cc use a different type of electrical connector than is in our cars. Those adaptors make it a plug n' play conversion. Alternately, you cut off your stock connectors and swap'm over. Most prefer not to hack stuff up.
Anyway, though... the 550cc are not going to flow enough fuel at any pressure to help you do 450whp. It's the 630cc at least or (more reasonably) the 750cc that you need.