Conversions

Thread Tools
 
Search this Thread
 
Old 03-19-2011, 05:27 AM
  #1  
AudiWorld Senior Member
Thread Starter
 
vtraudt's Avatar
 
Join Date: Jan 2010
Location: Brighton, MI
Posts: 1,550
Received 8 Likes on 8 Posts
Default Conversions

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)?
Old 03-19-2011, 05:49 AM
  #2  
AudiWorld Senior Member
Thread Starter
 
vtraudt's Avatar
 
Join Date: Jan 2010
Location: Brighton, MI
Posts: 1,550
Received 8 Likes on 8 Posts
Default

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
Old 03-19-2011, 05:52 AM
  #3  
AudiWorld Senior Member
Thread Starter
 
vtraudt's Avatar
 
Join Date: Jan 2010
Location: Brighton, MI
Posts: 1,550
Received 8 Likes on 8 Posts
Default

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?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Phantom RS
Audi R8
8
01-30-2008 10:03 AM
Nickle
A4 (B5 Platform) Discussion
25
03-29-2006 09:24 AM
mcpath
VAG-COM Discussion
4
05-15-2005 07:56 PM
PaulW
A8 / S8 (D2 Platform) Discussion
16
01-26-2005 02:39 PM
PaulW
A8 / S8 (D2 Platform) Discussion
19
01-20-2005 05:25 AM



Quick Reply: Conversions



All times are GMT -8. The time now is 02:34 PM.