high load tune

[joegernem13]

hi guys,

im new to vt plus the whole home tuning thing so please bare with me,
i have a corksport air intake 2nd decat removed and cat back jetex exhaust,
would the high load tune for gen1 mazda 3 be ok for me or would i have to play with it to get the best out of the tune?


thanks
doddy

[mituc]

You didn't mention fuel pump internals. If you have upgraded pump internals you can go with the high load no problem. Otherwise going above load 1.9 in the mid range is just playing lottery with your engine integrity.

[joegernem13]

Ok thanks mituc,

would I have to make any changes if I uprated my internals of my pump or would it just be ok to run on the stock high load tune?

many thanks
doddy

[Steve @ VersaTune]

PM sent. You will need to lower wastegate duty cycle a bit to avoid boost spikes.

[joegernem13]

that sound like hard work is it? im a total newbee to all this,
how would I know if it was spiking would I feel it or would I only se it on my log?

[Steve @ VersaTune]

You will see the manifold absolute pressure and load spike in the logs.

[joegernem13]

ok thanks, I will take some logs and have a look at what happens,
would this be the same for the lower boost map as well?
what I mean is would I have to lower the duty cycle on this as well so that it would not spike?
as I am still struggling on where to find the percentages let alone lower them all by 10%
I feel this is all a bit above me at this stage as I am new to home tuning and turbos

many thanks a very confused
peter

[joegernem13]

i have done some log to me it looks like it is spiking but i not sure what i am supposed to be looking for

am i right in thinking that to change the wastegate duty cycles by 10% like you said i would have to adjust the
BCS DC Adjustment Barometer values by the desired amount 10%?

many thanks
peter

[Steve @ VersaTune]

You want to adjust the BCS DC Base table. That is the initial BCS DC that the ECU uses and adjusts from there based on inputs and load target.