Conversions

vtraudt · 03-19-2011, 05:27 AM

I found this handy conversion chart for injectors.
My VAGcom logs show injector timing in ms; I am still running stock injectors and stock fuel pressure on my 1998 A4 1.8T AEB
Is there an estimate to derive the flow (in cc) from injector time (my seems to max out at 16.32 ms from 2600-7000 rpm)?

vtraudt · 03-19-2011, 05:49 AM

This is the handy injector conversion chart:

Conversions
• 500cc per minute is approximately equal to 49lbs per hour which is equal to approximately 100hp.
• lbs/hour = cc per minute / 10.2
• lbs per hour = HP / 2.04
• cc per minute = lbs per hour x 10.2
• cc per minute = HP x 5
• HP = cc per minute / 5
• HP = lbs per hour x 2.04

vtraudt · 03-19-2011, 05:52 AM

My log shows 16.32 ms injector time all the way to 7000 rpm.
Is that a realistic number of something the ECU spits out as a 'limit number'?

If my math is correct:
7000 rpm = 116.7 rev per sec

For a 4 stroke at 7000 rpm:
34.3 ignition strokes per sec or 34.3 ms duration per ignition stroke.

A injector time of 16.32 would mean the injector is 'open' for more than half of a stroke time?

03-19-2011, 05:49 AM	#2
vtraudt AudiWorld Senior Member Garage is empty, add now Join Date: Jan 2010 Location: Brighton, MI Posts: 901	This is the handy injector conversion chart: Conversions • 500cc per minute is approximately equal to 49lbs per hour which is equal to approximately 100hp. • lbs/hour = cc per minute / 10.2 • lbs per hour = HP / 2.04 • cc per minute = lbs per hour x 10.2 • cc per minute = HP x 5 • HP = cc per minute / 5 • HP = lbs per hour x 2.04 __________________ 1998 Passat 1.8T manual; Kraftwerk Turbo TM2, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, high flow manifold, S4 clutch, single mass FW, FMIC, custom TIP, Kraftwerk Tune 1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune 2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC 2001 Audi Allroad 2.7T quattro manual; custom stg 1 1996 Audi A4 2.8 quattro automatic. Stock. Issues: heated seats not working (from neer model), ignition lock/key hangs, TERRIBLE gas mileage. www.regulatorfix.com www.kraftwerkturbo.com

03-19-2011, 05:52 AM	#3
vtraudt AudiWorld Senior Member Garage is empty, add now Join Date: Jan 2010 Location: Brighton, MI Posts: 901	My log shows 16.32 ms injector time all the way to 7000 rpm. Is that a realistic number of something the ECU spits out as a 'limit number'? If my math is correct: 7000 rpm = 116.7 rev per sec For a 4 stroke at 7000 rpm: 34.3 ignition strokes per sec or 34.3 ms duration per ignition stroke. A injector time of 16.32 would mean the injector is 'open' for more than half of a stroke time? __________________ 1998 Passat 1.8T manual; Kraftwerk Turbo TM2, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, high flow manifold, S4 clutch, single mass FW, FMIC, custom TIP, Kraftwerk Tune 1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune 2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC 2001 Audi Allroad 2.7T quattro manual; custom stg 1 1996 Audi A4 2.8 quattro automatic. Stock. Issues: heated seats not working (from neer model), ignition lock/key hangs, TERRIBLE gas mileage. www.regulatorfix.com www.kraftwerkturbo.com

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