starscream5000 said:
heres a good thread btw... just popped up
http://www.supramania.com/forums/showthread.php?t=43139
lex+440s = 6 detonated pistons! proof!
Need injectors for Lexus AFM, I don't know which ones.
- Thread starter aaronmancilla
- Start date
heres a good thread btw... just popped up
http://www.supramania.com/forums/showthread.php?t=43139
lex+440s = 6 detonated pistons! proof!
Exactly, the lexus afm allows more airflow compared to the stock afm while providing the ecu with the same reading... basically you get about a 20% increase in airflow while the ecu still *thinks* that there is the same amount you had coming in with the stock afm... So if you had the 440's installed, with the lexus afm, the ecu would send the same amount of fuel to match the amount of air that it *thinks* is there... and now your running lean.
MKIIINA said:
As you can see by that thread, his tune was less than desired for his setup. Just like I said, it takes a good tune to keep you engine running with that combo, a damn good tune, something I personally wouldn't risk trying.
starscream5000 said:
No rash conclusions at all just bouncing ideas around
...... But what you said /\ is very open for negative interpretation. Prehistoric is normally looked upon as "don't use it"
MKIIINA said:
Quick question ..... Whats a rough estimate max HP you get out 550's? I believe 500+. What about 680's? I believe 600+ .......HHHHMMMMM what about 440's? Wait dont tell 400+ i see a little pattern.
If people crank the boost up and dont have a wideband to actually see what they are doing thats their F-ing fault. 440's will support good power. You guys should really read around.
If I tell you that alot of guys with SC400 and MKIV's with a 2jzge correction i meant 2jzge-t upgrade their stock injectors to mkiii 440's with the Lex AFM would ya believe me and in their world its part of the FAQ sections as a good platform ........
bountykilla0118 said:No rash conclusions at all just bouncing ideas around
Sorry about the prehistoric, we'll replace it with, outdated, but still popular, technology
.
starscream5000 said:Sorry about the prehistoric, we'll replace it with, outdated, but still popular, technology
Yes no more loss of sleep over this subject j/k...... how bout older not outdated :biglaugh:
bountykilla0118 said:
Quick question, how many injectors does a 1UZFE have? You can make 3 left turns to go right, but that doesn't mean you should.
suprarich said:
Yep. True of many subjects. Throwing parts away the car doesn't need, EGR causing BHG's, blah blah blah...
Nick M said:
Nick M .... one of the people i respect the most in this community! How ya been?
But are you saying that it is wrong? 3 left turns? Ok well the fastest way to any given point is a straight line
. I already have injectors that will support the 400rwhp range why should i change if i am aiming at the 350-400rwhp for now? I will service/flow test, drop in a fuel pump and bypass the j-tube but if everything checks out good and i stay inside of the safe duty cycle of the injectors why should i change? To be on the safe side? Any part can fail at any time new and used.The path of lease resistance..... "if it aint broke don't fix it" but do the proper maintenance :biglaugh:
Because the pulse width is wrong. Then you have to scale the airflow meter to get it right, when the right injector is the way to do it.
RPM and airflow are the base mapping inputs. And now the airflow is a lie.
RPM and airflow are the base mapping inputs. And now the airflow is a lie.
Lexus+440s@14psi
Of course if I want to break 400hp without going to 100% duty cycle I'll need 550s.
Of course if I want to break 400hp without going to 100% duty cycle I'll need 550s.
It's been fine for over a year so far. The blue and red run were both on same boost. I realize it looks like we added a couple psi and it leaned out the mixture but that's not the case. We leaned it out purposely (shooting for 12.7 iirc) and netted some power (and if you look we took out the lean spike between 3-4k rpms).
I dynoed again a couple months ago and put out similar numbers and no signs of running out of fuel just yet. But as mentioned before I shoot for higher numbers I will go for 550s because of the duty cycle. The math shows that an 85% duty cycle on our stock injectors (430cc 42.2lb/hr) should be good for 391bhp. I wouldn't feel comfortable going much more than 85% (though at 100% the stockies are good for 460bhp)
I'm not telling people to not buy 550s if they get the lexus, most people will probably need it. Just look at your power goals and pick injectors accordingly. If your shooting for under 350rwhp the 550s are overkill. Obviously understand how the lexus works and WHY you will need more fuel, the engine will need more fuel one way or another.
I dynoed again a couple months ago and put out similar numbers and no signs of running out of fuel just yet. But as mentioned before I shoot for higher numbers I will go for 550s because of the duty cycle. The math shows that an 85% duty cycle on our stock injectors (430cc 42.2lb/hr) should be good for 391bhp. I wouldn't feel comfortable going much more than 85% (though at 100% the stockies are good for 460bhp
)I'm not telling people to not buy 550s if they get the lexus, most people will probably need it. Just look at your power goals and pick injectors accordingly. If your shooting for under 350rwhp the 550s are overkill. Obviously understand how the lexus works and WHY you will need more fuel, the engine will need more fuel one way or another.
and then....bountykilla0118 said:
staticpat said:
blue line = lex afm
red line = stock afm
this ws done back to back on a dyno with switching out nothing but the afms.
can you do 400 rwhp on 440s? sure. was that the point of this thread? no. if 85%+ injector duty safe? no. are you asking for trouble using 15+ year old injectors at that kind of duty? imho yes.
theres a difference of can it be done and is it a good idea/safe.
MKIIINA said:
You are 100% right. 440's at 350rwhp is pretty safe granted they are in good working order along with a flow testing would be ideal.