I MAY BE WRONG, but this is what i have to shed on the situation:
1) The lowest boost you can run will be limited to the WG spring, so 5lbs is probably out of the question.
2) EMS uses boost by speed and not by gear, iirc. So you should prolly go out and whind all your gears out(kind of slow, i guess) to get an idea of where the gear ends at pertaining to the cooresponding speed.
Wait for nutz or chuck to come in and shed some actual facts on this situation.
__________________
The purpose of ignition advance is to account for the lag time following spark ignition for combustion pressure to peak at 15 degrees AFTER TOP DEAD CENTER. A little fyi !
well, the AEM does have "Gear Calculated" and when driving down the road that thing is dead on in knowing which gear I am in. That tells me that there has to be some way for it to do boost by gear.
As far as doing "Boost by VSS (vehicle speed)" thats not too hard.
Go into your Boost Target Speed Table. ( Boost Control>Advanced Boost>Boost Target Method>VSS Dependant. When looking at the table the only thing I can think of to do boost by gear is:
Of course the minimum amount of boost you can run is what your wastegate spring is set at. So if you set this graph to 0psi at 1-16MPH you still will boost what your wastegate spring is (mine is 9psi)
well, the AEM does have "Gear Calculated" and when driving down the road that thing is dead on in knowing which gear I am in. That tells me that there has to be some way for it to do boost by gear.
As far as doing "Boost by VSS (vehicle speed)" thats not too hard.
Go into your Boost Target Speed Table. ( Boost Control>Advanced Boost>Boost Target Method>VSS Dependant. When looking at the table the only thing I can think of to do boost by gear is:
Of course the minimum amount of boost you can run is what your wastegate spring is set at. So if you set this graph to 0psi at 1-16MPH you still will boost what your wastegate spring is (mine is 9psi)
i would think the boost by VSS would be MUCH better than boost by gear (infinate flexibility and feedback) but I am convinced that the EMS (and some relays) can do ANYTHING
i am going to be getting a boost solenoid (gm one) and tell everyone how the boost by vss works out for me. hopefully it will solve my part throttle launches and blowing the tires off in 2nd.
i am going to be getting a boost solenoid (gm one) and tell everyone how the boost by vss works out for me. hopefully it will solve my part throttle launches and blowing the tires off in 2nd.
a balance of that and traction control would be awsome (lots of loging)
Sooo... I just got my methanol fixed last night and turned up the boost to 25psi (on 60 trim). I am running 11.3 - 11.5 AFR from full boost to 7000 RPMS with less than .1 volts of knock! Also running 21 degrees of timing..
Well, on the way home from work tonight and decided for some reason to brake boost 3rd gear from a 70 roll... WOOHH!! Brake boosted to 16psi and let her go... happy to say its my first time breaking loose in 3rd gear. No, it wasn't just a little spin catch spin spin... it was full on almost wanting to white smoke from 70MPH. It was great
Sorry, completely off topic, just wanted to share my first timer
Sooo... I just got my methanol fixed last night and turned up the boost to 25psi (on 60 trim). I am running 11.3 - 11.5 AFR from full boost to 7000 RPMS with less than .1 volts of knock! Also running 21 degrees of timing..
Well, on the way home from work tonight and decided for some reason to brake boost 3rd gear from a 70 roll... WOOHH!! Brake boosted to 16psi and let her go... happy to say its my first time breaking loose in 3rd gear. No, it wasn't just a little spin catch spin spin... it was full on almost wanting to white smoke from 70MPH. It was great
Sorry, completely off topic, just wanted to share my first timer
Sooo... I just got my methanol fixed last night and turned up the boost to 25psi (on 60 trim). I am running 11.3 - 11.5 AFR from full boost to 7000 RPMS with less than .1 volts of knock! Also running 21 degrees of timing..
Well, on the way home from work tonight and decided for some reason to brake boost 3rd gear from a 70 roll... WOOHH!! Brake boosted to 16psi and let her go... happy to say its my first time breaking loose in 3rd gear. No, it wasn't just a little spin catch spin spin... it was full on almost wanting to white smoke from 70MPH. It was great
Sorry, completely off topic, just wanted to share my first timer
Its only just begun, !
If your interested i have a AEM tuning class im putting together in Dec(5-6), its in fayetteville NC, about 8 hours from you...Could be beneficial.
Boost by speed is a fairly nice feature, but the issue with it is the following:
1) The threshold of boost is more gear dependent than speed dependent. Reason being is the torque multiplication factor of gear splitting! In other words, the amount of boost that can be run in 3rd gear without wheelspin is greater than the amount that can be run in 2nd gear at the same speed w/out wheelspin. In that sense, boost by gear is a better method of boost control.
2) The other problem with boost by speed is that when you DO begin to spin the wheels, typically the boost target increases with the wheel speed, and as such, you will run into even more wheelspin due to the boost target increasing while you are spinning. The only way to avoid this would be to run the vehicle speed sensor off of the NON-driven wheels!
Unfortunately, this is no small task of making it work on our car. You would have to do something that could convert the hall effect signal of the ABS rings into a voltage that would be fed into the EMS.
Now, the AEM EMS does NOT have any readily available "Boost by Gear" tables in the software. That's not to say that it doesn't have the capability to control boost by gear, as I'm sure it could be configured to do so. But I believe it would require a firmware flash/update and some software re-configurations to make it work (something an AEM engineer would have to do). I can't imagine that this would really be all that difficult a task to undertake for one of the AEM engineers, and I can't figure out for the life of me why they don't just have this option already available!
Now the End-all Be-all of boost control (IMO) would be "boost x gear x RPM". That would give you infinite possibilities for boost control! You could start the boost out a little conservative in every gear (to avoid wheel spin), and ramp it up as RPMs increase, and effectively have a base for how much boost each and every gear can possibly run without wheelspin.
If your interested i have a AEM tuning class im putting together in Dec(5-6), its in fayetteville NC, about 8 hours from you...Could be beneficial.
Hell to the yeah! I have been looking for some type of AEM class for the longest time. How much is it going to cost? Also, why all the way at December? Why not sooner?
They will be releasing the DRIFTING.com dvd soon to show a lot of "How to's" on tuning, but I will definitely want to come to a AEM class to learn more.
I have a guy here in Knoxville (mark from fastec) that just bought a dyno-dynamics dyno from a shop in Atlanta that shut down. He will have the Dyno up and running by the first of the year. I would love to be able to do work for him tuning cars on the side for some extra money. Just need to get more knowledge of the software.
Heres the thread. The good info starts on page 3 or 4. Basicly one of the guys taking the class has a dyno and for the 2 days of class we can use it for free. Thats why its in Fayetteville. Now the reason we did Dec 5-6 is so that everyone could plan in advance, the tuner is coming from Indiana i think? Or maybe PA.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Using AEM to do boost by gear... how to ???
Linear Mode
