launch maps
how much boost do you build per negative degree of timing? for 5500 for mine im making 7 pounds of boost with 6 to 9 degrees taking in consideration that 140-170 load is around 7 pounds
any recommendations on target AFR for launching?
I'm guessing same as target AFR at WOT per launch RPM but hoping anyone testing something different could offer up some suggestions....
I'm guessing same as target AFR at WOT per launch RPM but hoping anyone testing something different could offer up some suggestions....
well at 2 step you dont see any afrs, but when launching you want some torque to keep the motor from bogging down, keep your afrs around 12.5-12 and as soon as you see the rpms start increasing besides slowly going up lower your afrs slowly from 11.9 to 11.3 to keep the temps down and to keep your horsepower going up, plus the 2 step will build up some serious heat for you evo guys
how much boost do yall make when stepping before launching? I only can get to 7 I would like to get to 10 pounds but I dont know if you lower timing or increase it at the point of the limiter.
Also I know this is really flamer for me to ask but how can I create the bang noise with a little flame without meth? I like it because it sounds really aggressive. But I was just curious. Do I just keep adding fuel into that table until it does what I want?
Also I know this is really flamer for me to ask but how can I create the bang noise with a little flame without meth? I like it because it sounds really aggressive. But I was just curious. Do I just keep adding fuel into that table until it does what I want?
ok gotcha im using the stock tephra fuel map so im assuming that is rich as well and my timing is around 4-5 degrees. Im going to lower it tonight to make more boost and then add more fuel for the bang effect and a little bit of flames 
also I have 880 cc injectors I got them at %50 percent right now, how much more power can I make with them before they need to be upgraded? Im currently at 230-250hp right now. Im thinking there good until 350 right?
also I have 880 cc injectors I got them at %50 percent right now, how much more power can I make with them before they need to be upgraded? Im currently at 230-250hp right now. Im thinking there good until 350 right?
I am currently not using launch maps and I cut pretty consistant low 1.7 - low 1.6 60 fts on street tires. Obviously if I am not using launch maps I am not building any boost off the line & I am launching at 0 psi. If I setup a launch map to have me build say between 8-12psi on the line how would this help with my 1/4 mile times?? I don't see this helping my 60 fts at all, if anything maybe make them worse due to spinning more off the line. I am assuming if I was still able to cut 1.6 60 fts while using a launch map at 10psi or so this would help lower my 330 time, correct?? If my 330 time is faster then my overall 1/4 mile ET & MPH should be as well. From mid 300whp to mid 400whp I have been able to cut the same 60 fts without launch maps & I want to make sure that if I decided to spend the time setting one up that it would benefit me. I also want to make sure I won't have to change how I launch my car because of now launching with boost. I run an unsprung 6 puck clutch so there is only so much I can slip the clutch. I preload her as far as she will go then let her rip & that is how I have done it for 40k miles. Any feedback on this would be appreciated!!
Yeah I know it used to mainly be used with big turbos to get them spooled before the lights dropped but it seems that a lot of people with stock frame/stock turbos are using it now also. My 2 step is set between 6150-6200 and I am happy with that right now as it seemed to work well with my setup and help me cut a 1.64 60 ft this past weekend. But if it will also help lower my overall ET & up my MPH then I am willing to try it out. I was just wondering if anyone was in a similar situation to me with cutting good 60 fts with no launch maps and tried it and it actually helped them run faster...
Anyone else have an option on this?? Once I throw my new lifters in I was thinking about working on a launch map but don't want to waste my time if it won't help me since I already cut 1.6 60 fts...
If you're cutting 1.6s 60's with your current map, I don't think launch maps will help you very much. They're mostly to help folks with huge turbos build more boost off the line.
I get black cloud of smoke when hitting launc map, what changes should I make to get some flames from the exhaust ?
boosting ~0.9 bar @5000 rpm, 10.5 afr with -5 timing in the launch map.
should I add more fuel, or retard timing more ?
boosting ~0.9 bar @5000 rpm, 10.5 afr with -5 timing in the launch map.
should I add more fuel, or retard timing more ?
Last edited by stunt2; Aug 31, 2011 at 01:48 PM.
If you have a cat, back-fires like you're looking for will destroy it pretty quick. More importantly, the increased EGT of having combustion taking place in the engine AND in the exhaust can decrease the lifespan of the turbo.
