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Title: Jetting advise for 2110 and 45 DRLA's Post by: PH1303 on August 16, 2016, 20:22:11 pm Hi
Hoping for a bit of advise from the lounge members. We are going to change my brothers 44 IDF's to 45 DRLA's, and hoping for some recommendations regarding baseline jetting for the Dellorto's. Engine spec are as the following: 82x90.5 5,5" rods Web 86B CB 1:1.4 rockers 9:1 static compression 1 5/8 merged header G03 heads with 39x35 valves When the engine was almost new, it made 152 hp and 213 Nm with the 44 IDF's. The Dells are with 38 mm venturies... /Peter Title: Re: Jetting advise for 2110 and 45 DRLA's Post by: javabug on August 17, 2016, 02:59:11 am Very, very close to my engine spec, but with 48 DRLAs and 36 vents. I have to double check my notebook, but I'm almost positive it's the following:
60 idle 160 fuel 190 air Depending on a few other factors like altitude and fuel type, it could be a slight bit on the lean side for you. But it will get you on track. Title: Re: Jetting advise for 2110 and 45 DRLA's Post by: DWL_Puavo on August 17, 2016, 08:51:31 am I second Mike's opinion - if you have the most usual 9164.2 emulsion tube, those jettings should be a good starting point. Also 38mm venturies seem like a good size for you heads, cam and engine displacement. You may need 65 idles (~17% bigger than 60) and maybe 170-175 mains (~13-20% bigger than 160). Most usual air correction jet is 180 and it should also be fine.
Title: Re: Jetting advise for 2110 and 45 DRLA's Post by: javabug on August 18, 2016, 14:56:51 pm I checked my notes, and I'm actually using the 65 idle jet.
Title: Re: Jetting advise for 2110 and 45 DRLA's Post by: PH1303 on August 20, 2016, 20:47:02 pm Tanks for all the advise. Much appriciated.
We have now checked the carbs, and they are equipped with: Idle: 58 Main: 160 Air: 200 Emulsion tube: 9164.2 Proberly a bit on the lean side, but maybe okay for start up. Title: Re: Jetting advise for 2110 and 45 DRLA's Post by: javabug on August 21, 2016, 13:22:23 pm It'll run like that, but you'll probably need 60-65 and maybe the 180.
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