fuel injector duty cycle and methanol question
#1
10 Second Club
Thread Starter
iTrader: (27)
Join Date: Sep 2008
Location: Lake Tapps, WA
Posts: 2,229
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Not sure how to word this question, but here goes.
If you have a turbo combination that puts you right at 90% duty cycle on 42lb injectors if you run 100% methanol at 1000cc min what will this approximately drop your duty cycle to if you tune for the same 11.5afr?
The motor is right around 650 crank horsepower
I asked this over in the fuel injection forum but no replies.
If you have a turbo combination that puts you right at 90% duty cycle on 42lb injectors if you run 100% methanol at 1000cc min what will this approximately drop your duty cycle to if you tune for the same 11.5afr?
The motor is right around 650 crank horsepower
I asked this over in the fuel injection forum but no replies.
#2
TECH Enthusiast
Join Date: Jan 2004
Location: New Zealand
Posts: 608
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I don't think anyone could give you a definate answer to that,
you will need to be more like 11.0:1 afr with meth.
even so you will be able to pull some fuel out of the tune and lower your duty cycle at the same power level.
But if you add more timing and or boost and make more power more fuel will be required.
I have duel nozels and a 250psi pump, at 15 psi boost without meth i am at 11.8 afr with the meth AFR drops to low 10s and thats with an extra 5 deg timing.So i can still pull some fuel, made an extra 45 rwhp.
you will need to be more like 11.0:1 afr with meth.
even so you will be able to pull some fuel out of the tune and lower your duty cycle at the same power level.
But if you add more timing and or boost and make more power more fuel will be required.
I have duel nozels and a 250psi pump, at 15 psi boost without meth i am at 11.8 afr with the meth AFR drops to low 10s and thats with an extra 5 deg timing.So i can still pull some fuel, made an extra 45 rwhp.
#7
TECH Enthusiast
Join Date: Jan 2004
Location: New Zealand
Posts: 608
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
Trending Topics
#9
Launching!
iTrader: (6)
Join Date: Oct 2007
Location: Colorado Springs
Posts: 266
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Are you guys running 100% meth or a mixed amount with water.
I am trying to see what I should run with 20lbs of boost. i was hoping to run 80lb hi imp. injectors and do the rest with the meth.
I am trying to see what I should run with 20lbs of boost. i was hoping to run 80lb hi imp. injectors and do the rest with the meth.