mail order tune question

spederman · Feb 11, 2006

I got my XCAL 2 with my mail order tune for my mods from modular powerhouse yesterday. When you get a mail order tune, what all is on the tune and what parameters are they messing with? Like, are they advancing timing, and spark, etc....

I see all the parameters that you can adjust with the XCAL2, but when you get a preloaded tune, is the tune that is saved on there have other parameters messed with that the xcal 2 doesnt allow end user adjustements too?

I guess what i am asking is, compared to a dyno tune, are there more parameters they can mess with when doing a dyno tune to give you the max HP out of a tune compared to just what the XCAL 2 does. Or is it a dyno tune that is just saved onto the XCAL 2 and then you have the option of adjusting a few of the parameters to tweak it?

I hope my question makes sense and isnt just rambling.

menasci · Feb 11, 2006

I would call Tim at MPH

blackfang · Feb 11, 2006

The Xcal2 is just a programmer that loads the tunes into your ecu. They create the tunes with the advantage 3.0software and thats does allow you to make some adjustments on your end, aka user adjusments. However a dynotune is the best way to go, but not everyone has the access for one.

Tim and Andy are very aggressive with their tunes. I would be willing to say you gained some hp by atleast 10-15 rwhp.

mexis97gt · Feb 12, 2006

blackfang said:
The Xcal2 is just a programmer that loads the tunes into your ecu. They create the tunes with the advantage 3.0software and thats does allow you to make some adjustments on your end, aka user adjusments. However a dynotune is the best way to go, but not everyone has the access for one.

Tim and Andy are very aggressive with their tunes. I would be willing to say you gained some hp by atleast 10-15 rwhp.

so then say since i have a dyno within 20 minutes of me would i be better off just getting a sct chip with a mail order tune and useing that for awhile and then just taking that to the shop when i get more internal mods. as opposed to a xcal2

spederman · Feb 12, 2006

blackfang said:
The Xcal2 is just a programmer that loads the tunes into your ecu. They create the tunes with the advantage 3.0software and thats does allow you to make some adjustments on your end, aka user adjusments. However a dynotune is the best way to go, but not everyone has the access for one.

Tim and Andy are very aggressive with their tunes. I would be willing to say you gained some hp by atleast 10-15 rwhp.

I had it dynoed today to check the A/F to make sure it was fine. But my luck, the POS dynojet was broke and would not read A/F, just HP/TQ.

Do you think it is neccessary to take it to another dyno asap to make sure the tune is on? Or are MPH's tunes perfect enough with a list of mods that i'll be fine and not worry about it?

jstreet0204 · Feb 12, 2006

spederman said:
I had it dynoed today to check the A/F to make sure it was fine. But my luck, the POS dynojet was broke and would not read A/F, just HP/TQ.

Do you think it is neccessary to take it to another dyno asap to make sure the tune is on? Or are MPH's tunes perfect enough with a list of mods that i'll be fine and not worry about it?

Any mail order tune is not going to dial in the MAF, so it isn't going to be as acurate, but if you want to see how close you are, Datalog your kamrf's. These are your fuel trim adjustments the eec is making. In closed loop, they should be close to 1.0. (1.05 to 0.95) would be about as close as you could dial in a MAF. But say you were consistantly seeing 1.12 this would mean the Maf curve is about 12% rich.

blackfang · Feb 12, 2006

Tim is a very good tuner. I am pretty positive you are pretty much where you want to be.

jstreet0204 · Feb 12, 2006

blackfang said:
Tim is a very good tuner. I am pretty positive you are pretty much where you want to be.

Regardless of how good a tuner is, it is impossible to dial in a MAF without the data you get from a dyno tune, or road tuning. Any mail order tune is not going to make adjustments to the MAF curve, but instead is based on the asumption that the MAF is close, and make only adjustments to the base or cammanded fuel tables..

mail order tune question

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