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  1. #1
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    HFS-4 meth kit setup?

    This setup was recommended to me by a shop that has installed the HFS-4 on other 335's, the shop was actually recommended by Howerton Engineering . Was hoping for some input or thoughts on best route to go reference nozzle set-up this is a 4 nozzle setup the two front are 1mm and the back are .7 i believe is what he said over the phone. Does this setup sound good? This is how it is described or sent to me via e-mail.

    We do the remote mount meth reservoir in the trunk over the battery compartment. It's a large enough tank to not be a hassle having to fill it up all the time. Meth use will vary with how much meth you decide you want to spray and how hard you drive the car daily. We mount the pump and relay in the trunk compartment under the trunk mat for a very clean and stealth install. Gauge pod fits nicely in the ashtray area. We do have to trim the ash tray a bit to fit the gauge, but as you see from the pics it looks very clean and can be completely hidden simply by closing the ashtray door. It's a little hard to see the meth lines in the engine bay, but you have the main feed line in white coming from the pump in the back which we route under the heatshielding by the fuel lines that feeds into your flow sensor injector mounted in the engine bay area, and from there the smaller black lines for the quad jets tapped into the intake and throttle body pipe.

  2. #2
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    You don't need 4 nozzles, way too much. If you're stock turbo the two 1mm will be plenty. I'd add the 3rd 0.7mm in if you're on RB turbos. For best nozzle placement I found that the location on the silicone coupler right after the FMIC outlet works best to distribute meth before it hits the motor. Howerton Engineering (Jeff Howerton) sells silicone hose adapters/bungs for 4mm and 5mm thick silicone couplers so you'd have to check which thickness silicone you're running there for a snug fit.

    On RBs, all out, I run dual 1mm nozzles post fmic on the silicone coupler, and one 0.9mm on the charge pipe. This is at 21.5-22psi on RBs in midrange. Corrections still happen here and there but very well within what I'd call safe boundaries of an aggressive tune.

  3. #3
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    Thanks DZ just posted this prior to getting your pm, sent you a couple of other questions.

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    Why do those damn nozzles have to be so expensive! I was hoping to use the 3 1mm nozzles that come with the HFS-4 and just adjust the amount of meth sprayed with the controller. Looks like I'll need to order some more parts...I did get an email back from ETS that the silcone couplers they use are 3.175mm thick and up to 4 depending on the coupler, so I went with two 4mm adapters.

  5. #5
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    You're ok with three 1mm nozzles. You need to just use two of them.

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    I thought for RB's you want 3 nozzles, and If I'm going to have you guys tune me for 100% e-85 I would want as much meth as possible?

  7. #7
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    Sorry @bmw335iguy, too many emails/pms/posts/threads these days...yes, for RBs three nozzles (two 1mm and one 0.9mm) is what I found to work best on my car with our local pump 94 octane.

  8. #8
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    No worries!

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    Don't see any pics?
    [02/07 E92 335i 6MT] - Under Construction
    [
    01/07 E92 335i 6MT] - Cobb S2+ PTF-protune | Stett CAI | ETS 5" FMIC | AR DP | AE Exhaust - Gone

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