Different Maps for different boost?
 

I always thought that one map handles all boost levels once tuned too say 15psi. You could run it perfectly fine at 10psi.

I was told by someone who will be tuning my car that really you should have two boost maps. Like 10psi street and 15psi drag/track etc.

He mentioned that if tuned for 15psi and running low boost the car will run rich and the car will not be as resposive etc.

Any truth to this.

Any tuners out there??

sound like you need another tuner.. some ppl run another map for added safety but you dont need it at all

Really?

It's begining to seem like there is no honest or actually tuners or any compentent people out there!!

(Spelling errors as usual) :)

Any good EMS has 3D fuel and Ignition mapping. You just need one map...

Dam!

One of the very few guys that tunes these around here seems to think otherwise.


So were do i go now?:(

Only reason you need alternate maps would be something like this:

Safety street map, nice and rich and maybe conservative timing.

Drag map, maybe race fuel, more on the edge of the safe/dangerous area for maximum performance.

For most cases if you do a smart job of tuning you will only need two maps, one for driving around on piss gas, and one for rocket fuel:)

So you're not going to tell us who this person is???

The answer is yes and no.

Ideally, you would want to optimize map tuning to your target boost level.  This means tuning for one boost level and then tuning for a higher boost level would mean for a non-optimum maps (for the lower boost).

In actuality, you can be off by as much as 10% to 20% on the fuel map, but the engine doesn't have any problem revving through it to the higher boost level.

Most people (including me) won't notice a lower boost non-optimized map.


-Ted

Thanks ted,

Looks like your going to visit higgi again soon. I was supposed to go up again next month but time will not allow it. Try and not drink to much CZ beer:) I love it down there:)

As far as the two maps issue it sounds like you agree that there should be two maps. He did say you can run one single map but it would be noticable better to have two. (Reason for him saying I need two maps) Not that I want to pay for two maps!

As far as not letting anybody know who is tuning my car is in case I have it all backwards and mistaken what he said. I don't want to start something if thats the case. Besides I only know him by his first name. He has some insane cars too! :)

Thanks for the info. Its always great to get help...........

Ian

I replied to your thread on TeamFC

Now, hold on a minute.

One map can be optimized for two boost levels. Why couldn't it? Every aftermarket EMS that I know of is MAP based and that means that a map could be precisely tuned for 1 bar and 1.5 bar, if you wanted.

Tune to 1 bar, then increase the boost and add fuel above 1 bar, but when the EMS sees 1 bar it's only going to give the fuel for 1 bar. Likewise, if it sees 1.5 bar it's going to give enough fuel for 1.5 bar (this, of course, assuming the fuel is there to be given).

The same would hold true for ignition timing.

Or do I misunderstand you, Ted?

Victor

Take your car to Marco @ Magnus Motorsports if you want it tuned. He knows RX7's and Haltechs well and he is in Canada, though I do not know exactly where.

I've dealt with him once.

I more or less gave him a list of stuff I wanted. Drove 4 hours he did not have it all and I told him well in advance that I will be coming up and driving long distance. I bought what little parts he had. I paid to much. Since I was in the process of starting to purchase all my parts and him charging me to much for said part I've decided that I will never deal with him again!!!

You would think knowing that I was going to spend thousands he would not blantantly rip me off.

Thanks for the heads up. I was going to us him.

Ian

I have dealt with Marco quiet a bit with both my RX7 and my DSM and never had a bad expierience. I would give him another chance, especially for the tuning buy parts wherever, I don't know anyone in Canada I would rather have do it.

In my experience, if you tune for 1.0bar then tune for 1.5bar, the wide-band will show that the 1.0bar fuel level is slightly lean, if the tuning is optimized.

At higher boost levels, the boost ramp is more aggressive, and this is the cause of the lean condition.

But, as I said before, you will most likely not feel any difference.
The wide-band does show this though on analysis.

This is not that big of a deal to worry about too much. :)


-Ted

Interesting. Thanks, Ted.