OK, I figured you guys out
09-04-2004, 03:59 PM
#1
AudiWorld Super User
Thread Starter
Join Date: Feb 2004
Posts: 7,825
Likes: 0
Received 0 Likes
on
0 Posts
OK, I figured you guys out
Going from stock injector 28lb/hr x 1.5 = 42lb/hr ford lighting. If you install injectors only, it will run rich without software change. Changing maf diameter from stock 73mm to 90mm increases area by almost exactly 1.5. (4183 mm^2 X 1.52 = 6358mm^2).
Interesting..
dave
Interesting..
dave
09-04-2004, 04:06 PM
#2
Elder Member
Join Date: Jan 2004
Posts: 30,248
Likes: 0
Received 0 Likes
on
0 Posts
Hmmm, don't think 90mm MAF matches up perfectly with the 42lb Lightning injectors.
FWIW, Mike2kS4 is running 42lb Lightning injectors with a 88mm MAF and had to pull pack the primary fueling almost 20%.
09-04-2004, 04:14 PM
#3
AudiWorld Super User
Thread Starter
Join Date: Feb 2004
Posts: 7,825
Likes: 0
Received 0 Likes
on
0 Posts
true, the larger the amm, the less you'd have to pull it back, right?
Not to mention the 42lb/hr might really be more, depending on s4 fuel pressure. Since I bought the turbos I'm taking a good look at his home brew fueling. That and revo software, if they'd ever start selling laptop/user adjustable software.
dave
dave
09-04-2004, 04:25 PM
#4
Elder Member
Join Date: Jan 2004
Posts: 30,248
Likes: 0
Received 0 Likes
on
0 Posts
Yes, but that doesn't mean bigger is better necessarily.
I know very little about injector flow rates, but IIRC the 42lb Lightnings are rated at 42 lbs with 3 bar of fuel pressure. Our system runs at 4 bar of fuel pressure....FWIW.
09-04-2004, 04:48 PM
#5
AudiWorld Super User
Thread Starter
Join Date: Feb 2004
Posts: 7,825
Likes: 0
Received 0 Likes
on
0 Posts
agreed. actual flow rate of 42lb/hr would be around 48.5 lb/hr
<center><img src="http://www.rceng.com/formula-4.gif"></center><p>which means they're good for 550+hp<ul><li><a href="http://www.rceng.com/technical.htm">http://www.rceng.com/technical.htm</a></li></ul>
Trending Topics
09-04-2004, 04:57 PM
#9
AudiWorld Super User
Join Date: Jun 2002
Posts: 12,088
Likes: 0
Received 0 Likes
on
0 Posts
Yes they are...
Hitachi MAF is smaller than Bosch in diameter too. The actual difference is quite a bit larger than a bosch to bosch conversion... something to keep in mind.