Boost logs for TDIs

[chillcupra]

I have done some boost logs recently for my remapped cupra. For those experts out there should actual boost always be above spec. My actual is above spec up till 3K where it starts to fall below spec.

Thanks

4th gear cc ph1
Mark RPM spec Act d.cycle

0.38 1554 1068 1140 31.5
0.78 1638 2220 1140 24.7
1.18 1575 2112 1320 29.1
1.58 1659 2232 1548 30.3
1.98 1701 2316 1836 41.8
2.38 1806 2436 2220 54.6
2.78 1890 2520 2508 57.4
3.18 1995 2556 2712 64.1
3.58 2121 2568 2928 72.1
3.98 2205 2592 2988 75.7
4.38 2310 2604 2928 72.9
4.78 2436 2616 2796 73.7
5.18 2520 2616 2748 75.7
5.58 2646 2616 2748 79.3
5.98 2730 2616 2760 79.7
6.38 2835 2616 2724 81.3
6.78 2940 2616 2688 82.9
7.18 3024 2616 2664 84.9
7.58 3108 2616 2628 85.7
7.98 3192 2616 2604 86.1
8.38 3276 2616 2592 87.7
8.78 3360 2616 2592 88.9
9.18 3444 2616 2604 90
9.58 3528 2616 2592 90
9.98 3612 2616 2568 90.4
10.38 3696 2616 2556 91.2
10.78 3759 2616 2544 91.2
11.18 3843 2616 2520 89.6
11.58 3927 2616 2520 89.3
11.98 3990 2592 2496 88.9
12.38 4053 2568 2496 87.7
12.78 4116 2544 2484 87.3
13.18 4200 2520 2484 87.3
13.58 4242 2508 2472 87.7
13.98 4305 2484 2472 86.9
14.38 4368 2460 2460 88.1
14.78 4431 2436 2448 88.5
15.18 4473 2412 2448 89.3
15.58 4536 2388 2436 90
15.98 4578 2376 2424 90.4
16.38 4641 2352 2424 92
16.78 4683 2340 2412 92.8
17.18 4704 2328 2400 94

 

[chillcupra]

anyone?

 

[devonutopia]

Looks pretty good after 3k, but before you're getting around 2 bar when it's requesting 1.6 as it's maximum between 2k & 3k. Not sure if that's OK.

 

[chillcupra]

It is mapped so that will explain the higher boost but shudnt the actual always be above spec???

 

[devonutopia]

Ideally, it should be spot on as far as I know. Even though it's mapped, that merely means more is being requested. I'm getting mega differences with mine at the moment as I'm running a massive turbo now with my old map, so I'm getting regular limp mode sessions due to "boost, negative deviation" - i.e it's requesting X and getting something well away from X (probably why I'm seeing 2.5 bar on the boost gauge quite a lot.....)

 

[chillcupra]

It it all looks ok?

 

[devonutopia]

It it all looks ok?

I think so, but I'm not much of an expert - How's the car performing? If the car is still running the standard turbo, I wouldn't have thought pushing 2 bar would be much good. You really don't want to be pushing more than is being requested - given the log you posted.

I'll copy/paste it on to TDIclub and see what they say.

 

[chillcupra]

Thanks very much!

 

[devonutopia]

Someone over there did a graph for you. Kind of illustrates much better what I was trying to say. That spike is not all that good in the long run

 

[chillcupra]

Cheers for that much appreciated

 

[devonutopia]

Forgot, they also added that it's not just the spike, it's also the low dip below the specified in lower revs. However, I don't like any map that is requesting over 1 bar of boost at just 1500rpn. Really you should not start seeing 1 bar+ until you're much closer to 2000rpm. This kind of "lull" in boost from 1500 to 1900rpm until it crosses, might explain why the boost is higher than specified from 2000 onwards.

I'm only guessing really but I believe the specified boost should follow more like what your actual boost is, but without the spike - it should level off gently to 1.6 bar for the remainder of the rev range.

 

[chillcupra]

The map has been checked out and is fine. I think I may have a boost leak! Its a pd160 for the record!