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Old 10.04.2019, 15:07
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Rimfire Rimfire is offline
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Join Date: May 2013
Location: Kerava
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Rimfire on oikealla tiellä
Siivoaisiko himassa vai laittaisiko tänne muistiinpanon? Hmm..

Muistiinpano korkeat bensapaineet tyhjäkäynnillä
Aeromotivella (Regun valmistaja) on tämä ohje josta olikin jossakin välissä puhetta mentorin kanssa. Liittyen siis viinamoottoreihin.
http://aeromotiveinc.com/wp-content/...c_Boost_01.pdf

Regussa on alipainelähtö jota ei käytetä bensavapareissa mutta viinamoottoreissa kylläkin. Tänne se sitten vedettäisiin:

Tässä ohjeen (siis linkin) tekstit:
Taking advantage of vacuum/boost reference capability on a naturally aspirated, alcohol engine, fuel pressure can be set higher for WOT operation but reduced at idle, using the vacuum in the intake. Although we can't completely control idle and WOT fuel pressure with vacuum like we can with an Aeromotive Belt Drive Pump and Double Adjustable Regulator, a real difference in pressure from idle to WOT is possible, and every little bit helps when it comes to alcohol carburetion.

In order to correctly adjust carburetor fuel pressure with a vacuum reference, use the following procedure: 1.) Start the engine cold, with the vacuum line disconnected and plugged to the intake. 2.) Immediately adjust the regulator for the maximum pressure that will keep the engine running without pushing fuel by the needle and seat. 3.) With the engine warm connect the vacuum line to the regulator and note the drop in pressure. 4.) Adjust the regulator back up to the maximum pressure you found was possible with a cold engine in step 2. Now, at idle, fuel pressure will be safe, but at WOT, fuel pressure will rise by the amount it fell when the vacuum line was connected. Usually a gain of 2-4 PSI is possible.

Caution: When starting the engine with a vacuum referenced regulator, tap the momentary side of the fuel pump toggle switch a couple times to fill the bowls, start the engine with the pump off, then turn the pump on.

Note: Vacuum is normally measured in "HG or inches of Mercury. The regulator works by lowering fuel pressure on a 1:1 ratio measured in pounds per square inch or PSI. The key to understanding how much fuel pressure will drop with vacuum is to convert "HG to PSI. The ratio is roughly 2:1, so every 2" vacuum at idle is equal to 1 negative PSI. If you know how much idle vacuum the engine carries, you can divide it by 2, to predict the amount of fuel pressure drop with vacuum.

Kai se on joku letku sieltä takaa sitten vedettävä. Jaa, sehän ottaa aikansa ennen kuin tieto WOT:sta on edennyt regulle saakka.. äh, tää voi jatkua haastavana edelleenkin.

Ulkoistus on mennyt niin loistavasti, että rajoittavin tekijä juuri nyt on sää ulkona. Kotiutus ei ole vielä tapahtunut, josko saisi sen vissin jokavuotisen viranomaisasian hoidettua samalla kun Time Machine on poissa ja sitten
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