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Title: g/min to cc Post by: vvt18 on April 29, 2020, 10:23:11 AM Hi all. Somebody can help me with an information PLEASE!
i want to buy this injectors 0280158235 They are specified in some places as 714cc and in other stores as 500g/min n-heptane It is the same thing 500g/min with 714cc? I found some convertors on internet and there they said 1g.min = 1cc. So i'm very desoriented. Many thanks in advance! Title: Re: g/min to cc Post by: nyet on April 29, 2020, 10:31:41 AM https://s4wiki.com/wiki/Fuel_injectors#Conversions
https://www.google.com/search?q=(1+g%2Fmin+%2F+720+kg%2Fm^3+)+in+cc%2Fminute%3D (https://www.google.com/search?q=(1+g%2Fmin+%2F+720+kg%2Fm^3+)+in+cc%2Fminute%3D) assuming 720kg/m^3 Title: Re: g/min to cc Post by: vvt18 on April 29, 2020, 10:40:45 AM Thanks Nyet. I made a conversion and i think i made ok after internet conversions
1lb/hr =10.499cc 1lb/hr = 7.55987g/min 7.56g/min is aproximatly 10.50cc/min so 500g/min si aproximatly after my calculation 695cc After WIKI 1 cc/min = 0.685 g/min 714cc = 489g/min All online stores put 714cc as description My calculation is wrong or they put as description a fake value. Thanks again in advance! Title: Re: g/min to cc Post by: nyet on April 29, 2020, 10:42:52 AM No problem, i should really add the 0280-158-235 to that page.
I dont have a reliable datasheet for it though. I didn't double check your calcs but they seem reasonable Title: Re: g/min to cc Post by: vvt18 on April 29, 2020, 10:48:55 AM I'll make an order and hope they will be fine.
Title: Re: g/min to cc Post by: vvt18 on May 06, 2020, 04:58:46 AM Hi.
I put the new injectors and drive 2 days with old tvub 1.5760 1.1040 0.9413 0.8373 0.7600 and krkte = 0.060 Car starts ok , running ok ltft after 30 km goes from -0.8 to -7.6 I adjust today the krkte to 0.044 after nyet formula. Please tell me the temin and teminva for 730cc must be 0.71 or 0.60? With 550cc i was running with 0.30 temin and temin va but i read the bosch injector migration topic and i saw there you said 0.6 will be good I found in the same topic a table with 750cc bosh calibration. I think i can use for my 731cc the same values as 750 decreased very very few. i will try tvub 1.6987 1.2000 0.9307 0.7307 0.6693 for bigger injectors tvub values must be higher than a small injectors? thanks in advance Title: Re: g/min to cc Post by: vvt18 on May 06, 2020, 11:21:21 AM tested new setup for my new 731cc at 3 bar
old setup from 550cc 3 bar tested on these 731 - start ok running ok ltft -8 , too much fuel on engine brake (rev) krkte =0.60 temin and teminva 0.3 tvub 1.5760 1.1040 0.9413 0.8373 0.7600 new setup used table from topic "bosch injector migration" little decreased : "START is very bad , after no difference krkte =0.445 temin and teminva 0.5 tvub 1.6987 1.2000 0.9307 0.7307 0.6693 i think i must have higher TVUB values for 731xx than 550cc, so the bosh table is bad any advices please Title: Re: g/min to cc Post by: nyet on May 06, 2020, 12:55:26 PM cold start vs warm start is wall wetting, not TVUB, not temin
Title: Re: g/min to cc Post by: vvt18 on May 06, 2020, 01:08:02 PM Thanks Nyet.
What temin is accurete for 731cc, i don't find any specification for them. I wrote to BOSCH and they told me they not have specifications. VERY NICE! With old injectors 550cc i had 95% duty and with these new 731cc have 80% duty at 1.5 bar but with my maf at the limit. |