Who all out of the boosted crew has been able to successfully raise the rev limiter with the EU?
For those who have, care to share what your fuel map looks like above 6500?

 

stock motor?

 

Mostly...

 

Im sure someone will chip in, just be careful man. higher rev's is when things start to get lil more stressed out specially boosted. got supporting goods such as rev up pump n such?

 

No, but Im oly considering going to 7k, 7200 at the most but unlikely. I did that with the JWT ecu and now with the EU I kind of miss hitting those higher revs from time.
If I were to go to 7500 Id definately do the upgraded oil pump and possibly valve springs.

 

I have it, but it just carried over from NA.

You need to log the fuel at redline. Then add that amount of fuel to about 100rpms before your redline(log will show what it is). At redline the fuel will output about 1.3-1.5, you gotta see what it is adding and make sure you subtract that amount in your tuning above 6500

 

Make sure you pull timing as well. When I did it I added a tad extra fuel just to make sure I didn't blow my engine. Then I slowly subtracted until I had the right A/F ratio. I'll dig through my computer stuff for my old maps. I need to redownload the EMU program also.

Zack

 

Thanks Kevlo, I was hoping you would chime in. When you say "see what it is adding", is this in refrence to the 1.3-1.5 you mentioned right before?




That would be great if you could, just for refrence.
Do you think I should keep the timing I currently have going up to 6500 and extend that all the way up to 7k or pull even more timing from the 6500 point and continue to pull as I go upward in RPMS till the desired point?

 

You advance timing the higher in RPM you go past torque peak, not retard. (you will still want timing more retarded than stock of course, but you should have more timing advance at 7000rpm than you will at 6500, but only to the tune of .5 or 1.0 degrees most likely).

 

Thanks Neal.
So in reality I would be safe where I am now just not making the most power I could be by advancing the timing.
Id just like to get the raised rev limiter figured out and allow the timing to be adjusted by the tuner on the dyno. The rev limiter was the one thing they couldnt figure out and didnt seem like they really wanted to try.

 

yeah you would be perfectly safe as far as timing goes just having the same advance at 7000 as you do at 6500 (this of course assumes that your 6500rpm timing is safe). you'd just not be making as much power as you could and your EGTs would be a little bit higher than they would with a little more advanced timing. just make sure it's safe and then if you want to fine tune later do that on the dyno.

 

There is a timing spike after 6500. I don't recall exactly which rpm but it does jump. But be sure you log this and check.

Say the ecu is outputting 11ms of fuel at 6400, so at 6600 you will want to put (11-1.x) in the cell to get past the rev limit. Make sense? The key thing will be the right transition RPM.
This will give you an idea:

I have not really went past redline under boost too much so that is why those values look generic.

This map is NOT complete lol so do not worry about me driving. Some if it was done by autotune so it looks weird

 

Back from the dead,

Still havent gotten this figured out. I took it to a local tuner and tried to get it going on the dyno by what was mentioned in this thread (showed it to him) but he wasnt succesful.
Any other pointers/advice?
Also, has anyone ever logged the JWT map with an extended rev limiter?

 

Doh!, forgot bout this lol. I am done with school for the semester so I have time to take another look at it if you want.

Anyway you can see if duration works with your car?

 

He (tuner) tried it that way, since the screenshots youve sent me showed duration but it didnt work that way either. I will shoot you my current map this evening.
Thanks Kevlo

 

Does it atleast try to get past stock limit? or does it stop right at redline? sometimes itll stop at redline, but then pick up again, which isnt a smooth transition. try adding 12m/s of fuel at 6450 and then again at 6500.

just for my own knowledge, i assume your new blower can handle these rpms and not overspin? ive been flirting with the idea of extending my rev limit to about 7k, but people keep scaring me about overspinning, etc.

 

I managed to extend my rev limit with the EU but I changed it back to stock.

I could never get it smooth enough and it just seemed like a ghetto way to go about raising the rev limit...

 

It just stops right at redline, like its aways done.
It will be overspinning a little once I hit above 6800 but I wouldnt be above that for very long so I dont think it would hurt it too much, especially if Im not doing it every day and with every shift.
Those with the older V2 blowers using a 2.62 are over spinning at 6500 by almost double of what Id be doing it.
The older V2s overspin just slightly at 6500 just using the 2.87 pulley and many have used that pulley and been ok with a little over spinning, I was using it with my V1 as well.

 

This was very helpfull, thanks.......

 

Timing with my jwt ecu is the same at 6500rpm as 7200 but the a/f gets alittle richer

 

Timing with my jwt ecu is the same at 6500rpm as 7200 but the a/f gets alittle richer