CTapp MAF readings... need to compare to someone else...

[VTECCURED]

whats up,

just did a quick log of my maf (ford lightening), ctapp software, aeb stock engine...

Can someone tell me if 90 grams per second is correct at that RPM ...
seems kinda low. but then again.. im comparing it to stock maf.

My A/F ratio sits at ~12.5 WOT.. which is cool to me...

car feels strong at some runs.. and weak in others.

Hows that ignition timing look for you guys?
sorry to be all over with these crazy questions !!!
thanks,
JOHN










http://docs.google.com/Doc?docid=dfc...r&hl=enhttp://

[Poopie]

I would bump up your fuel pressure a little bit. thats a little lean for my liking. Maf readings look just about right. You'll probably hit about 100gs at 7000 rpm which is about 300whp. Timing looks pretty good, although I don't know how much timing is getting corrected. Log block 03 with 20 next time to see what your timing is doing.

[VTECCURED]

I would bump up your fuel pressure a little bit. thats a little lean for my liking. Maf readings look just about right. You'll probably hit about 100gs at 7000 rpm which is about 300whp. Timing looks pretty good, although I don't know how much timing is getting corrected. Log block 03 with 20 next time to see what your timing is doing.

well poopie,
i did bump up the fuel pressure , but just by 3psi.... so instead 45psi at idle, im at ~48... should i go more?

i did log block 20 as well.... but didnt record it! i did see 5-6 max at really high rpm..
but i will log (record) it next time so i can post it...
thanks poopie..

appreciate it!!!

john

[Poopie]

5 and 6 is about the max timing correction you want. If you are about that then i say your logs look good.

[317ssayzarc]

what psi was this at? that will determine the MAF readings...

i reached 105 at 18ish psi....

[VTECCURED]

what psi was this at? that will determine the MAF readings...

i reached 105 at 18ish psi....

I'm running on a 1bar spring....

Very weird.... My clutch is stock, and sometimes it won't grip when I get on it... But other times it grips. Goes to show that car varies in power sometimes pulls like a bitch, and other times it very mellow.. Wierd, does this happen to ur setups!

[317ssayzarc]

spec flyhweel and sb stage 4 here, cant get the thing to slip at ALL lol

[mike-2ptzero]

spec flyhweel and sb stage 4 here, cant get the thing to slip at ALL lol

Well I guess we will have to see if it holds when I launch the hell out of it at the track.

[317ssayzarc]

Well I guess we will have to see if it holds when I launch the hell out of it at the track.

if i can figure out why its pulling 15.7 degrees of timing that is

ill need a new clutch for the 35r im sure

[VTECCURED]

LOL with a stage 4.... Damn u shouldn't see any slippage!!
I'm going with a sb stage 4 with light weight fw as well !
What I meant... Does ur car feel good one time and not so good the next time?

[317ssayzarc]

LOL with a stage 4.... Damn u shouldn't see any slippage!!
I'm going with a sb stage 4 with light weight fw as well !
What I meant... Does ur car feel good one time and not so good the next time?

the clutch is very consistent now, but its a little tricky when your breaking it in... once its broken in you can just rev it to 2kish and slip it out a bit, you just cant roll it out at 1k and expect it to go like stock lol...

[sean1.8t]

Well I guess we will have to see if it holds when I launch the hell out of it at the track.

ugh! tell me about it

but damn! that's a lot of timing! i wish i could get my car to run that in the higher rpms

[gotaudi]

lol my car runs 0 degrees of timing between 4000-6000rpms, my car pulls it away from the start. How does Ctapp get that much timing out of the engine? maybe I am just surprised because I have to run 91 oct.

[beejohn]

running lots of timing, ctapp is known for that. it would be good to check 020 to see how much you are pulling back. how do you know it's ~12.5? do you have a wideband?

also, if you are doing back to back runs your intercooler will get heatsoaked. that might be why it feels great on the first run, and so-so later on.

[VTECCURED]

running lots of timing, ctapp is known for that. it would be good to check 020 to see how much you are pulling back. how do you know it's ~12.5? do you have a wideband?

also, if you are doing back to back runs your intercooler will get heatsoaked. that might be why it feels great on the first run, and so-so later on.

hey whats up beejohn...

yeah i have a wideband... PLXdevices.. and i do see ~12.5 when i get on it!
i did check 020, but just observed it... didnt log(record) it. and the highest i seen was 6 on cyl 1. everthing else was like 2 - 3.

i understand about heatsoak, but actually the first run was so and so... where i didnt feel it pulling (driving to the dentist)... but second run after the car was stopped and cooling for over an hour... (driving home from the dentist) the fucin car pulled like bat out of hell!!!

weird stuff!!!

thanks,
JOHN

[mike-2ptzero]

lol my car runs 0 degrees of timing between 4000-6000rpms, my car pulls it away from the start. How does Ctapp get that much timing out of the engine? maybe I am just surprised because I have to run 91 oct.

what are your block 020 readings like? Because your car might not be running enough timing period.

[317ssayzarc]

what are your block 020 readings like?

hopefully not like mine...

[beejohn]

hey whats up beejohn...

yeah i have a wideband... PLXdevices.. and i do see ~12.5 when i get on it!
i did check 020, but just observed it... didnt log(record) it. and the highest i seen was 6 on cyl 1. everthing else was like 2 - 3.

Good CFs. But like Poopie pointed out, just a lil lean.

the inconsistency of your runs could be many things. do you have a boost gauge? if your boost is lower during those runs it could indicate a leaky hose, dv, etc. how is your intake setup? if the air coming in is quite turbulent because of no velocity stack the MAF can mismeasure the airflow. only back to back logs can really tell you that.

[gotaudi]

what are your block 020 readings like? Because your car might not be running enough timing period.

block 20 shows timing pull from 3000-6500 it starts pulling 9 degrees then increases to 11 so right where the boost hits the overall timing is around 0... then later in the RPMs when timing map increases the overall timing increases. I just don't know what causes the timing pull

[VTECCURED]

Good CFs. But like Poopie pointed out, just a lil lean.

the inconsistency of your runs could be many things. do you have a boost gauge? if your boost is lower during those runs it could indicate a leaky hose, dv, etc. how is your intake setup? if the air coming in is quite turbulent because of no velocity stack the MAF can mismeasure the airflow. only back to back logs can really tell you that.

my intake setup is like many others.. where it comes from the turbo down (90 degree) then another 90 degree towards the fender with like 20 degree into the maf then a filter.

i have a boost gauge and its steady at 14-15 psi. WOT.


the maf reading might be whats causing inconsistent power... but if my maf was not reading correct flow, wouldnt i run lean or noticed trouble on my wideband?

thanks,
john

[VTECCURED]

i have my fpr set to 48 psi with the vac disconnected... should i go more fuel pressure?
should i try to run 3.5 bar?

but wont the ecu adjust fuel by cutting back on injector pulses? to stay within spec?

im just a bit confused on this concept...
sorry

john

[mike-2ptzero]

i have my fpr set to 48 psi with the vac disconnected... should i go more fuel pressure?
should i try to run 3.5 bar?

but wont the ecu adjust fuel by cutting back on injector pulses? to stay within spec?

im just a bit confused on this concept...
sorry

john

It will cut it during idle and part throttle but you might end up with more fuel during WOT. The ecu only uses a target AFR on the 2001+ cars.

[A4 TSCHUSS]

im confused. In that log it shows your throttle angle as only half open for half the log and then it is only 87% the rest And my car is at 229.44 g/s from 5000rpm up

[317ssayzarc]

im confused. In that log it shows your throttle angle as only half open for half the log and then it is only 87% the rest And my car is at 229.44 g/s from 5000rpm up

not on the 90mm Tap tune unless your on a 35r on race gas or something...

[VTECCURED]

i feathered the gas... since my stock clutch doesnt hold, and lets loose on me...
so i feathered it and finally opened it up all the way..
87 is full throttle ...

with the car off, i have vag it, and pedal to the floor ... and it reads 87%.

200 grams is what i thought it should have been... compared to stock maf and stock ecu.
but after comparing it to another member with 90mm maf... it seems i might be within spec!

john

[Poopie]

Another thing to consider....

When i had my stock clutch, at high rpm it would slip. I also had a TON of timing correction and would misfiring like crazy. As soon as I replaced the clutch, the timing corrections were normal and no more misfires. My assumption is that that slipping clutch caused the ecu to miscalculate the engine load readings and for the timing map to go way off. This is just my theory. After upgrading my clutch I never had the same issues. I even made a post about it way back when i was still trying to get my set up running good.

[VTECCURED]

Another thing to consider....

When i had my stock clutch, at high rpm it would slip. I also had a TON of timing correction and would misfiring like crazy. As soon as I replaced the clutch, the timing corrections were normal and no more misfires. My assumption is that that slipping clutch caused the ecu to miscalculate the engine load readings and for the timing map to go way off. This is just my theory. After upgrading my clutch I never had the same issues. I even made a post about it way back when i was still trying to get my set up running good.

thats exactly what im trying to do... get this thing dialed in so i dont have to it every weekend. lol

but my clutch/flywheel combo is on its way from BoostFactory... and i did notice some clutch slippage on one of the runs... but didnt notice it on the run when that i log and post it up. Hopefully ill get this installed and complete the dialin in.

thanks...

JOHN