[Schmidty335i]

it seems like a lot of the n55's have throttle closure problems. everyone who i have seen that gets rid of them almost completely are people who have the jb4 and cobb stacked with the back end flash.

[Schmidty335i]

also if you guys really want to have some fun, trust me on this. get a meth kit and some boost juice. been running mine fine for 15000 miles now. i will never give up my meth! haha HUGE different!

[Mike@N54Tuning.com]

Originally Posted by n55e90

so is my car running like it should on those data logs other than having throttle closures? i feel like its only gained about 20whp. I was expecting a lot more from this jb4.

Throttle looks normal here. It's octane that is seriously lacking. Look how low cyl1 timing is. I'd go down to map 1 and evaluate. Do you have access to E85?

Mike

[n55e90]

Originally Posted by Schmidty335i

it seems like a lot of the n55's have throttle closure problems. everyone who i have seen that gets rid of them almost completely are people who have the jb4 and cobb stacked with the back end flash.

I thought the back end flash wasnt available for the n55 yet.

[n55e90]

Originally Posted by Mike@N54Tuning.com

Throttle looks normal here. It's octane that is seriously lacking. Look how low cyl1 timing is. I'd go down to map 1 and evaluate. Do you have access to E85?

Mike

I should start pumping shell gas then. Yea i got access to e85.

[n55e90]

Originally Posted by Mike@N54Tuning.com

Throttle looks normal here. It's octane that is seriously lacking. Look how low cyl1 timing is. I'd go down to map 1 and evaluate. Do you have access to E85?

Mike

the timing is allover the place though? what should the timing be?

[n55e90]

Originally Posted by Schmidty335i

also if you guys really want to have some fun, trust me on this. get a meth kit and some boost juice. been running mine fine for 15000 miles now. i will never give up my meth! haha HUGE different!

I rather run e85 than meth

[Schmidty335i]

Originally Posted by n55e90

I thought the back end flash wasnt available for the n55 yet.

it is if your car is 2010-early model 2012. go to n54tech.com and read up on the bms back end flash. you will need a cobb ap to do it though. iam still waiting for other means to arise though since i dont wanna drop 900 dollars on a cobb.

been waiting for awhile now, hopefully not much longer.

[Schmidty335i]

Originally Posted by n55e90

I rather run e85 than meth

thats what i thought before too since i have e85 right down the block and already have the flex fuel lines installed. i dont know about others but my car respones waaaay better to meth. i thought the first time i used e85 was fun until i blew my mind with meth. only bad thing about that is i have to order it from online since i live in cali.

[mike@x-ph.com]

Originally Posted by n55e90

the timing is allover the place though? what should the timing be?

You have some timing drops. As Mike said post a log with map 1 and better gas so we can compare logs

[n55e90]

Originally Posted by mike@x-ph.com

You have some timing drops. As Mike said post a log with map 1 and better gas so we can compare logs

ok i will try to do that tonight. i just pumped gas at the same gas station though lol going to have to wait. i will do a log on map 1 though tonight.

[mike@x-ph.com]

Originally Posted by n55e90

ok i will try to do that tonight. i just pumped gas at the same gas station though lol going to have to wait. i will do a log on map 1 though tonight.

I recommend you wait until you have good gas. Until then just use map 1

[n55e90]

Originally Posted by mike@x-ph.com

I recommend you wait until you have good gas. Until then just use map 1

i did a map1 3rd gear pull

http://datazap.me/u/goosemann55/log-...-4-5-6-9-11-18

[n55e90]

here is another map 5 3rd gear pull

http://datazap.me/u/goosemann55/log-...-4-5-6-9-11-18

[Andrewe92]

a couple of extra tips.. don't cheap out on the fmic, go for helix or ams ... something of quality. and 2. get a catless 4" downpipe also of quality otherwise it won't fit well (small exhaust leak possible)

I speak from experience, but enjoy

[mike@x-ph.com]

Originally Posted by n55e90

i did a map1 3rd gear pull

http://datazap.me/u/goosemann55/log-...-4-5-6-9-11-18

You are overboosting a bit which is causing throttle closure

I recommend you change your octane and put the best octane possible 93 and E85

Once you get better gas, do another log and contact Burger Tuning technical support so they can fix the overboost

[n55e90]

Ok thanks

[Mike@N54Tuning.com]

Originally Posted by n55e90

i did a map1 3rd gear pull

http://datazap.me/u/goosemann55/log-...-4-5-6-9-11-18

Timing is better with the lower boost but you are rolling off the gas pedal up top.

Best place for tuning advice is going to be BMS' support forum. You might be happier with the E series ISO firmware. Details on that are posted over there.

In any event I'd stay on map 1 until you can mix in some E85.

Mike

[n55e90]

Yea that was my gf trying not to push the button lol

[Dhillon92]

+1 on doing the ISO mod for more stable and controlled boost, in my opinion its a must. Timing looks better on map 1, you want try and keep it above 5*. More octane = better timing = more boost = more power.

You can also get a kickdown blocker so that you can floor it without hitting the button.

[n55e90]

Originally Posted by Dhillon92

+1 on doing the ISO mod for more stable and controlled boost, in my opinion its a must. Timing looks better on map 1, you want try and keep it above 5*. More octane = better timing = more boost = more power.

You can also get a kickdown blocker so that you can floor it without hitting the button.

i just looked up how to do the ISO and I'm doing this tomorrow lol

[Chocolatethunder]

Originally Posted by n55e90

I've had the jb4 for 2 weeks now and it did get faster but definitely not close to the 60whp they claim from being tune only. and the top end dies too. I don't know how people say it pulls hard all the way to redline when boost falls on its face after 6k rpm.

Do a JB4 backend flash if You want it to pull hard to redline.