VersaTune User Forum

Can somebody explain more about these tables? I saw another post but there's no explanation about it.

It's basically a multiplier for the final load request at a given rpm point when changing gear. It prevents over boosting when changing up or down the gears while gunning it.

If these tables can help to reduce the back firing between shift? Since I'm running BT I have some sporadic backfire, and btw the bov is fully recirculated.

Sent from my EVO using Tapatalk 2

I don't think it will help that sounds more like a fuelling issue.

The accel/decel tables work in both ways as far as I remember, both when upshifting or downshifting.

However, I second skiptowncat about the fueling issue. Backfiring means either fuel injected into the exhaust stroke or unburnt fuel exploding when exiting the exhaust due too less air just before the load decrease. You're either running too rich or your BPV has a too stiff spring.

What high pressure fuel pump are you using. What is your fuel pressure target set to? Do you see the pressure sensor pegged at max when you shift?

OMISPEED3 wrote:If these tables can help to reduce the back firing between shift? Since I'm running BT I have some sporadic backfire, and btw the bov is fully recirculated.

Sent from my EVO using Tapatalk 2

I'm using CP-E HPFP and is set to 1,800 psi. On my logs, I didn't see nothing weird.

How are your LTFT's and eventually actual versus commanded AFR/lambda at WOT? I see you have the SURE seals, maybe something is leaking there.

Well bad news, I made a boost leak test yesterday and I found my compressor is leaking by the o ring seal between the compressor and plate. Let me see if I can replace that during the week.

Sent from my EVO using Tapatalk 2