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trucnh · May 28th, 2019, 03:41 AM

With the setup, i will use the old Throttle Body, jut there 02 things which i think to compensate the fuel to reach optimal AFR:

1. Fuel pump is enough, i checked my 300 found that its spec is 50ml/3 seconds, it is too high (in my opinion). So I checked the 1000, in his service manual, it is the same flow rate- 50ml/3 seconds.

2. Injector:
As I know i some places on the Web, maximum HP of a 250-turbo modded and reached 59 HP on dyno. So I used this number for calculation as at 59HP

So I calculated the flow rate of injectors by this formula:
59 HP x BSFC Turbo 0,65 / 2 cylinders' injectors/ 0.8 duty cycle = 24 lb/hr = approx 252 cc/min.
I tried to find the specs of current injector (EAT-811) and the 1000 (INP-289) to recheck the replacement by still not find data so far.

Could you please advice about calculation, pls correct me if I wrong some thing.

P/S: I welded 02 bungs on the exhaust dump pipe:
- 01 for the Oxygen sensor to monitor AFR by AFR gauge
- 01 for wide band Oxygen sensor in Autotune set from Dynojet (install later)

May 28th, 2019, 03:41 AM	#14
trucnh ninjette.org member Name: Truc Location: Vietnam Join Date: May 2019 Motorcycle(s): EX300 Posts: 23	With the setup, i will use the old Throttle Body, jut there 02 things which i think to compensate the fuel to reach optimal AFR: 1. Fuel pump is enough, i checked my 300 found that its spec is 50ml/3 seconds, it is too high (in my opinion). So I checked the 1000, in his service manual, it is the same flow rate- 50ml/3 seconds. 2. Injector: As I know i some places on the Web, maximum HP of a 250-turbo modded and reached 59 HP on dyno. So I used this number for calculation as at 59HP So I calculated the flow rate of injectors by this formula: 59 HP x BSFC Turbo 0,65 / 2 cylinders' injectors/ 0.8 duty cycle = 24 lb/hr = approx 252 cc/min. I tried to find the specs of current injector (EAT-811) and the 1000 (INP-289) to recheck the replacement by still not find data so far. Could you please advice about calculation, pls correct me if I wrong some thing. P/S: I welded 02 bungs on the exhaust dump pipe: - 01 for the Oxygen sensor to monitor AFR by AFR gauge - 01 for wide band Oxygen sensor in Autotune set from Dynojet (install later) Last futzed with by trucnh; May 30th, 2019 at 12:12 AM.