knock real or false

[Vbb1994]

on the map, when i first started buy stuff someone told me to ge the 3 bar. i dont really know why. should i just put a 1 bar in then retune everything.could that be my issue

Well, you may wanna use the 1 bar for now, 2/3 of the voltage resolution you have available is being reserved for manifold pressures you cant achieve YET (once you go boosted you'd need it), 1 bar MAP would allow for much better increments of tunability across the range... I see the map is very jerky and all over the place on the log. That has to make tuning difficult.


Regarding the AEM, I have the same one. Wired thru a pro link as well. So that really must mean you're drenching the wide band in raw fuel in some areas. Not in front of the laptop right now but min injector PW or min fuel mg might could be set lower and it'd stop drenching the sensors in raw fuel every time you have a decel throttle event...


The other guy mentioned it stalling and i was wondering the same thing? Theres like 3 or so instances where RPMs hit 0 MAP reaches baro, then over a 2 or 3 second span, RPMS build back up and map goes back to whatever is normal idle condition.. just like a cranking event.... seems like its stalling.


I also wanted to point out every knocking event happened with PE coming in way too late AND it was in 3rd or 4th gear.

personally I'd adjust the shift tables and make it drop a gear whenever you get on it so you can keep the cylinder load down before you blow a ring land off.

[mychevyisntheavy]

so change the map to bar 1, what shoiud i set the min injector to , and then lower the shift scheduling , it was stalling i had changed the folloer and cracker to try and stop. and i hand the in drive timing a .5 higher it seemed to help. im trying here . thanks for the help guys. it really is helping me out. i had two diferent guy tune this thing neither one has gotten it right. i understand i have alot mods done to this thing. but youd think guys would come across things like this.

[dhoagland]

your right. i do have it at 39. i hit the wrong button. dyslexic i quess. lol. i changed to 36. im tuning the ve again .

How about the vacuum referenced regulator?

[dhoagland]

Well, you may wanna use the 1 bar for now, 2/3 of the voltage resolution you have available is being reserved for manifold pressures you cant achieve YET (once you go boosted you'd need it), 1 bar MAP would allow for much better increments of tunability across the range... I see the map is very jerky and all over the place on the log. That has to make tuning difficult.


Regarding the AEM, I have the same one. Wired thru a pro link as well. So that really must mean you're drenching the wide band in raw fuel in some areas. Not in front of the laptop right now but min injector PW or min fuel mg might could be set lower and it'd stop drenching the sensors in raw fuel every time you have a decel throttle event...


The other guy mentioned it stalling and i was wondering the same thing? Theres like 3 or so instances where RPMs hit 0 MAP reaches baro, then over a 2 or 3 second span, RPMS build back up and map goes back to whatever is normal idle condition.. just like a cranking event.... seems like its stalling.


I also wanted to point out every knocking event happened with PE coming in way too late AND it was in 3rd or 4th gear.

personally I'd adjust the shift tables and make it drop a gear whenever you get on it so you can keep the cylinder load down before you blow a ring land off.

Good observation
Can you get into Tow/Haul, Sport shift mode (not sure if you have it), but that table would definetly shift different and keep you out of the zones mentioned here

MyChevy.jpg5.jpg

[mychevyisntheavy]

it is vacuum but i dont have a vacuum line going to it. if i do dont i need to change the 36lbs to more settings?

[mychevyisntheavy]

i want to thank you both verymuch for taking the time to help me. i just dont want blow this thing up. i havent held the pedal to the flor ever since i built this thing . i knew bye getting knock it wasnt right. im gonna make the changes you both say i need to do. on the vacuum thing , run the line to the regulator and change the fuel flow rate table to what setting, then im gonna put the right map sensor in . then make the other change you guy said. then put it in speed density to tune the ve right. does this sound right to you guys?

[gtstorey]

You really need to start with giving an injector part#, brand and supplier and a link to injector data info unless these are GM injectors. Unless I just missed it.

[mychevyisntheavy]

You really need to start with giving an injector part#, brand and supplier and a link to injector data info unless these are GM injectors. Unless I just missed it.

they are 36lbs injecto
rs, ev6 on the plug ends. 4 hole, the injector data came from a guy in here its in the tune.selfs are ( 0280158227) (6-21-11-12-065625) this is onone side of the injector, (br3e-eb) (fomoco) (b556v) they are green oil seals on the bottoms.

map i have extra map i have is part#16249939 is a 1 bar map is this the one i should be using. trucmaro.black.p01.5.7.4l80e.07.06.2025.og2.hpt this is the tune

[gtstorey]

Plug ends, # of holes and oring color doesn't matter for tuning. The internet search on those injectors show a flow rate of 34.6 lbs/hr at 43.5 psi. What fuel pressure are you running?

[mychevyisntheavy]

Plug ends, # of holes and oring color doesn't matter for tuning. The internet search on those injectors show a flow rate of 34.6 lbs/hr at 43.5 psi. What fuel pressure are you running?

58lbs. so i need to drop it to 43.5psi @ 34.6lbs flow

[mychevyisntheavy]

guys i cant think you guys enough

[gtstorey]

58lbs. so i need to drop it to 43.5psi @ 34.6lbs flow

I would say that you probably need to get different injectors since those injectors are ones that tend to show up on a lot of iffy sites. Where did you source them from? And why did you decide on a ford injector?

[mychevyisntheavy]

Plug ends, # of holes and oring color doesn't matter for tuning. The internet search on those injectors show a flow rate of 34.6 lbs/hr at 43.5 psi. What fuel pressure are you running?

so im changing the map sensor to a 1 bar, change the data for that sensor, change the injectors to 34lbs , and drop to 43.5psi. then tune the ve, does this sound right. and make the changes in the shifting of the trans

[mychevyisntheavy]

i got them cause its all i could efford at the time. i will get better ones here soon. make sure i get the data for them also. i just have to get this to work as best as i can for now plans are to upgrade here soon ,,, waiting on my bonus from work.

[mychevyisntheavy]

i had gm truck decapped injectors in there at first , and they just wouldn work on the tbss intake i got these and the fit the tbss intake, but i plan on getting the right stuff here soon.

[dhoagland]

This is by no means a professional timing table, but I believe its a safer place to start

[mychevyisntheavy]

This is by no means a professional timing table, but I believe its a safer place to start

i pln on getting a dyno tune once i get my cash to get this thing lined out. i have a set of 243`s in the shop getting ported and freshed up. my plan is to buy a super charger with new injectors. i just want make it few more months and with the knocking going on i know ill have problems. i thank you guy alot for your time and expert help. lord knows i need the help. ill make the changes and scan a log and bring it back in here for you guy to look at. again i thank you guys. wish i had it to give back cause i would. i try to help people every chance i get. i know im blessed and i try. thanks again

[dhoagland]

i pln on getting a dyno tune once i get my cash to get this thing lined out. i have a set of 243`s in the shop getting ported and freshed up. my plan is to buy a super charger with new injectors. i just want make it few more months and with the knocking going on i know ill have problems. i thank you guy alot for your time and expert help. lord knows i need the help. ill make the changes and scan a log and bring it back in here for you guy to look at. again i thank you guys. wish i had it to give back cause i would. i try to help people every chance i get. i know im blessed and i try. thanks again

Nice build
If nothing else I'd highly recomend the low octane table in this (and the file I sent last night)... That way you have a safety to fall into if you get knock. Look forward to seeing the logs

[mychevyisntheavy]

i run 93 -91 0ctane no lower.

[gtstorey]

i run 93 -91 0ctane no lower.

"Low Octane" isn't really based upon octane of the fuel. It reduces timing based upon the amount of knock detected. Typically, this is caused by running lower octane fuel but that doesn't have to be the cause.