[Hoper]

Because I'm now really scared that something will go wrong with my nice new motor, I logged my entire drive to work to look for timing corrections

it was a cruisey drive to work since the engine is still new, so the WOT action is limited at the moment

I noticed that on 5 occasions during the 30min drive, while cruising along at 2-3k rpm with very little throttle the DME pulled some timing, about 2-3 deg, from 1 or 2 cylinders, which resolved quickly, the cylinders moved around, the AFRs were in the 14's since it was cruising so no real explanation

I was wondering if anyone else had logged normal driving and seen this? just trying to understand if I have a minor issue lurking

any advice appreciated

Note : I logged a 3rd gear pull for Tim last night, it was clean apart from some timing corrections just post shift from 3rd to 4th

Hoper

[vtl]

Would you mind posting datazap logs?

[Coupes33]

Here are a couple of datalogs of my car cruising at 80 and 70 kph that I have just taken.

https://datazap.me/u/coupes44/datalo...og=0&data=3-21

https://datazap.me/u/coupes44/datalo...og=0&data=3-21

[Hoper]

Originally Posted by vtl

Would you mind posting datazap logs?

here's the one I took this morning, really long log sorry

https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

and here's my 3rd gear pull
https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

enjoy

[Coupes33]

Originally Posted by Hoper

here's the one I took this morning, really long log sorry

https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

and here's my 3rd gear pull
https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

enjoy

Hoper, your 3rd gear pull looks ok to me. You have timing corrections only on 2 cylinders which is fairly normal. Most tuners say timing corrections on up to 3 cylinders isn't a problem. Your AFRs on both logs look good. Your cruising AFRs are the same as mine. Your wastegate readings up to 54% are good. More boost might see these rise a bit. In one section of the cruising log you had several timing corrections for some reason. Why where you in 5th and not 6th for such a long drive? At those revs, you must have been doing 100kph in 5th.

[Hoper]

Originally Posted by Coupes33

Hoper, your 3rd gear pull looks ok to me. You have timing corrections only on 2 cylinders which is fairly normal. Most tuners say timing corrections on up to 3 cylinders isn't a problem. Your AFRs on both logs look good. Your cruising AFRs are the same as mine. Your wastegate readings up to 54% are good. More boost might see these rise a bit. In one section of the cruising log you had several timing corrections for some reason. Why where you in 5th and not 6th for such a long drive? At those revs, you must have been doing 100kph in 5th.

Yep true Coupes, I would've been doing about 100 in 5th, dunno why I don't use 6th for my commute, it's just a rarity for me, only in a 100kph zone for about 3 or 4 mins so I tend to leave it in 5th

I'm actually wondering if the wastegate rattle causes the cruising corrections, I can hear the actuator arms rattle at these cruising speeds

[Coupes33]

Originally Posted by Hoper

Yep true Coupes, I would've been doing about 100 in 5th, dunno why I don't use 6th for my commute, it's just a rarity for me, only in a 100kph zone for about 3 or 4 mins so I tend to leave it in 5th

I'm actually wondering if the wastegate rattle causes the cruising corrections, I can hear the actuator arms rattle at these cruising speeds

Why would you have wastegate rattle? I thought you installed new turbos back in February this year. They shouldn't have any wastegate rattle with only a few thousand kms on them. With the engine running, it wouldn't be the modified outlets touching the steering shaft. Just a thought. Looking at the datalog, it appears that there is a spike in the actual load at the time of the timing corrections. You didn't go up a steep hill or something like that during the drive?

[vtl]

Originally Posted by Hoper

here's the one I took this morning, really long log sorry

https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

and here's my 3rd gear pull
https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

enjoy

As the compression ratio has changed, the volumetric efficiency of the motor has changed. Looks like the fuel volume requirements has also changed. If you look at your fuel trims on the 3rd gear log they're almost maxed on only 98 (I like seeing fuel trims less than a few %)

You can 'fix' this by increasing the fuel scalars (luckily easy fix) but a fundamental change like compression ratio change means that most of the mathematical models used in the DME (there are thousands of them) are now incorrect.

[BM3Rrrr]

Originally Posted by Hoper

here's the one I took this morning, really long log sorry

https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

and here's my 3rd gear pull
https://datazap.me/u/hoper/newly-bui...og=0&data=3-22

enjoy

What IC are you running? Your getting a 20 deg C increase in IAT over one pull which is a lot.
Your consistently under boost target by 2+ psi throughout the run.
STFT's are extremely lean. (+34 or close too)

[Hoper]

Originally Posted by BM3Rrrr

What IC are you running? Your getting a 20 deg C increase in IAT over one pull which is a lot.
Your consistently under boost target by 2+ psi throughout the run.
STFT's are extremely lean. (+34 or close too)

Thanks Guys, haven't been on here for a few days, yep Tim is looking at the fuel trims and also the boost, as Vince said it's quite a different engine now, so it's reacting very differently to the changes Tim is making, so it'll probably be a slower process than normal

don't forget that log was from the v1 map, effectively the first base map for the new engine, looking at my later logs the fuel trims are still high and the boost is still under target, I'm sure we'll get there, will just take time

will post another log in a week or so

oh and the turbo's are cheapish eBay jobs, the wastegate actuator has always been a bit loose, they don't have the full on wastegate rattle, they're also not rattle free

and yes now that I've spent so much on the internals, I'll be heading for a different turbo solution at some stage, something with more capacity, it'll have to wait until funds become available though

[E85 335]

Just go single turbo. If I could turnback time with what I know now compared to back them I would of went single for sure. Twins are a pain in the ass. been through the 3 sets. The stock set, RB set which smoked after 1400km then a set of Pure stage 2's which eventually stuff out and got a replacement set.

[Hoper]

Originally Posted by DAT335

Just go single turbo. If I could turnback time with what I know now compared to back them I would of went single for sure. Twins are a pain in the ass. been through the 3 sets. The stock set, RB set which smoked after 1400km then a set of Pure stage 2's which eventually stuff out and got a replacement set.

Thanks Dat, yes I think that's the plan, Ray here I'm CBR has a nice low mount single turbo setup, will probably try and replicate that one, he's had a water pipe fabricated so the turbo can sit in the middle of the block.

I really like the installation in preference to a top mount, so we'll see how we go

[Hoper]

Log from v7b tune, V8 has more boost but I haven't logged it yet

Starting to get a little closer

https://datazap.me/u/hoper/forged-in...&data=3-22

[Socket]

Getting closer Hops. Def need to go ST but why no love for top mount?

[Hoper]

Originally Posted by Socket

Getting closer Hops. Def need to go ST but why no love for top mount?

Sorry Socks, I like the fact that the low mount looks stock, that is if you don't know what an n54 engine bay normally looks like

The top mounts are pretty obvious as an upgrade and look really cramped when done

Once I had a look at Rays solution, I decided I'd go that way if I head for single territory, which is likely now that I've spent all the cash on the internals, will take a while for the money tree to recover though, it's looking very bare ATM

[Socket]

Originally Posted by Hoper

Sorry Socks, I like the fact that the low mount looks stock, that is if you don't know what an n54 engine bay normally looks like

The top mounts are pretty obvious as an upgrade and look really cramped when done

Once I had a look at Rays solution, I decided I'd go that way if I head for single territory, which is likely now that I've spent all the cash on the internals, will take a while for the money tree to recover though, it's looking very bare ATM

Fair call ... looking forward to following along when the $ tree gets some new sprouts