NEW DYNO #'s! AND A FEW QUESTIONS

[95snoozer]

kbcobra95

can i see your dyno graph?

 

[haulbalz]

you are not running out of fuel with 42s

do you have a 255 hi pressure?, you should

i would definitely go to a new tuner. he doesnt know what he is doing

and to whomever said they are leaving 5.0s behind, doesnt keep up with things very well

only reason you might see more things come up for the 4.6 is that the 4.6 has 4 production aftermarket manifolds while the 5.0 has over 20 already.

4.6 head afermarket? none unless you want to get a ford head. There are many porters, yes

5.0 head, whats new? trick flow has recently released CNC ported trick flows, the new edelbrocks are pretty recent as well

I dont get where you are coming from with your statement

Yeah, I've got the 255 from walbro, and a t rex. I'm pretty sure this guy knows what he's doing, and I trust them. But after spending 5-6 hours on it, I think they were getting a little hungry and tired. He's supposed to be the best in tulsa, and anywhere close to there.

He reccommended the SCT maf, but he also reccommended 60#ers. That was one of my big reasons for posting this thread. Could the MAF being pegged cause it to run out of fuel, right?

I appreciate your help guys!:SNSign:

 

[final5-0]

Could the MAF being pegged cause it to run out of fuel, right?

You could have 90lb inj's and still be able to peg that maf.

A meter gets pegged for no other reason than the motor draws more air through it than it can accurately report to the pcm.

Maybe he had data showing you were going lean before the maf pegged.

If you have no more details, its all just speculation.

What method was he using to tune SCT, Diablo, etc

Grady

 

[haulbalz]

It's an SCT tune. And what I meant by the pegged maf, is that, could when it pegs, it's not accuratly reporting how much air is comming in, so it might not be sending enough fuel. causing me to think it might be the injectors?

Does that make sense?

 

[YEAHLOH95]

i think its just in your meter can you just replace it ? the 42's should be ok , i am only running 38's and put down over 450 to the wheels

 

[final5-0]

It's an SCT tune. And what I meant by the pegged maf, is that, could when it pegs, it's not accuratly reporting how much air is comming in, so it might not be sending enough fuel. causing me to think it might be the injectors?

Does that make sense?

Here is my reasoning

It'd be great for others to offer their agree/disagree comments

Say you pegged at 3/4 of your total possible ariflow range.

That last 25% of airflow would use the last kg/hr maf transfer cell value to work with.

You'd have an increase of airflow
with NO increase in the kg/hr value
so
the pcm would not to know to increase the pulse width

LEAN CITY

Grady

 

[YEAHLOH95]

yes i agree ,if it pegs it goes into an open loop and the thing goes lean, and bad things happen if you are under boost

 

[95snoozer]

Yeah, I've got the 255 from walbro, and a t rex. I'm pretty sure this guy knows what he's doing, and I trust them. But after spending 5-6 hours on it, I think they were getting a little hungry and tired. He's supposed to be the best in tulsa, and anywhere close to there.

He reccommended the SCT maf, but he also reccommended 60#ers. That was one of my big reasons for posting this thread. Could the MAF being pegged cause it to run out of fuel, right?

I appreciate your help guys!:SNSign:

it would be the maf before the injectors, i have lots of friend making low 500s with 42s and maf, no fmu.

the tuner is full of it, bottom line

there is a walbro 255 and a walbro HIGH PRESSURE 255

the regular has been known to lean out up top

 

[OinkAodeOink]

Has anyone mentioned this LMAF as being the 80mm unit or the 90.. There is Def a difference in the two, as to their limitations.. I would have to bet your running the earlier 80mm version, which is normally good to about 400rw or so, in draw through. BTW, Is your car an auto or stick?

 

[haulbalz]

It's a 94 cobra(stick), and it's the 90mm LMAF

 

[haulbalz]

TTT