spartan 275v3 vs. 275v4

08twinturbo · #1 (**permalink**) 08-12-2009, 06:51 PM

hey, just loaded the new 275v4 update and was wondering why dont i hear the turbo blowing sound turning on and off at idle like it did on the 275v3. it just blows hard all the time at idle. what is the real differences in these two tunes. i know it shifts different as well.

powerstroke586 · #2 (**permalink**) 08-12-2009, 06:57 PM

that turbo blowing sound is the vanes opening and closing but i dont know why it would do that? how do you like the update?

Mxr695 · #3 (**permalink**) 08-13-2009, 12:07 AM

actually it could be the egr he is referring too ... i know when at idle it circulates on and off and changes the tone of the exhaust

po-po 5.0 · #4 (**permalink**) 08-13-2009, 04:07 AM

EGR should be disabled in the 275.

**eric.davis** · #5 (**permalink**) 08-13-2009, 05:36 AM

Quote:

Originally Posted by po-po 5.0

EGR should be disabled in the 275.

It is turned off but it still cycles while at idle

drservo · #6 (**permalink**) 08-13-2009, 06:02 AM

Quote:

Originally Posted by 08twinturbo

hey, just loaded the new 275v4 update and was wondering why dont i hear the turbo blowing sound turning on and off at idle like it did on the 275v3. it just blows hard all the time at idle. what is the real differences in these two tunes. i know it shifts different as well.

Earlier lockup is what I like better about V4

EROD · #7 (**permalink**) 08-13-2009, 06:02 AM

What is the difference between 275V3 and 275V4, may be there is thread on this already (pardon my ignorence).

po-po 5.0 · #8 (**permalink**) 08-13-2009, 06:36 AM

Quote:

Originally Posted by drservo

Earlier lockup is what I like better about V4

Nice while racing...........irritating in normal street driving.

**08stroker250** · #9 (**permalink**) 08-13-2009, 06:51 AM

Quote:

Originally Posted by EROD

What is the difference between 275V3 and 275V4, may be there is thread on this already (pardon my ignorence).

Many people were experiencing a P0088 code and limp mode with the 275 v2 and v3 in the heat. The v4 is the fix for that. The 275v4 also has the same style shifting as the 310 tune

What are people seeing the rail pressure idle at? I see 5800 psi

**eric.davis** · #10 (**permalink**) 08-13-2009, 07:11 AM

Quote:

Originally Posted by po-po 5.0

Nice while racing...........irritating in normal street driving.

why do you find it irritating during normal street driving? I personally like it. The sooner it locks for me the better for my mpg

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