What is best to log? HHH

[bad84kat]

I have had the HHH datalogger for awhile but never really got a chance to use it much. What is the best thing to log when doing 2nd and 3rd gear pulls?

Looks like I can log alot of things at once so please list in priority.

I did a few 2nd gear pulls and saw .94v on rear O2 WOT but saw knock at approx 5800-6000rpm (6-9 count) TPS 94% open. IDC rising to 87-90%. I dont know if this is right but it looked like Timing advance was a steady 20 from start to end?

BPU with 13-14 psi on MBC stock injectors and Turbos no ecu/AFR control items.

Thanks for any advice.

[sleeper3000]

Originally Posted by bad84kat

I have had the HHH datalogger for awhile but never really got a chance to use it much. What is the best thing to log when doing 2nd and 3rd gear pulls?

Looks like I can log alot of things at once so please list in priority.

I did a few 2nd gear pulls and saw .94v on rear O2 WOT but saw knock at approx 5800-6000rpm (6-9 count) TPS 94% open. IDC rising to 87-90%. I dont know if this is right but it looked like Timing advance was a steady 20 from start to end?

BPU with 13-14 psi on MBC stock injectors and Turbos no ecu/AFR control items.

Thanks for any advice.

well you wanna log knock,airflow,rpms,O2,IDC..... are you trying to just get some logs before you get ecu management/fuel control?

not much you can do about knock with just logs, if you cant change anything, all you can do is put some higher octane fuel in and see if it gets rid of some of the knock..

[HLxDrummer]

I would do a log with timing, IDCs, RPMS, knock, 02's. After I did a few of those (since I haven't changed injectors/turbos/etc.) I just do logs every once in a while with knock, RPM, and 02's now to make sure everything is ok.

When do you get knock? How many counts? What are the 02's? What boost? You can try hotwiring your pump if you are running lean. If that doesn't help it may be your fuel filter or fuel pressure or something if you aren't running an insane amount of boost. Also a lot of carbon in the combustion camber could cause knock.

[bad84kat]

I re-looked at the logs and the timing is o.k. I must have been smoking crack when I saw 20 deg. Knock is at the above mentioned rpms.I have been amassing parts for turbo upgrade (13ts) in the near future but wanted to do some logs to compare before and after the build.I am undecided yet on what afr controller to go with.

Should I log front or back O2.

[HLxDrummer]

What is the timing like? Something is causing knock at higher RPMs and you O2's look ok, but it is just a narrowband. You may need some more fuel.

Have you ran Seafoam (not that I or do not recommend it!) or fuel system/combustion camber cleaner through it ever?

I usually log both front and back 02's, but if your only going to log one, the back one is the best to keep an eye on.

[bad84kat]

Timing is around 30-32 deg(I dont have access to log right now).O2's were .93v not .94v on all pulls at WOT.Fuel was 91 octane.I have not been driving it alot(using my beater for daily/work) so it took awhile to get down low on fuel.I just filled with 94 octane but it is 10% blend with ethanol right from the pump.I see the guys on E-85 need alot more fuel but are getting more HP due to better knock control.Is this right? I hope 10% is not enough to worry about. I have not done anything with the fuel pump yet.I wa holding off until I get a better pump (leaning towards Supra pump)I have used injector cleaner about 2-3 times a year. I have not changed the fuel filter for quite a while,I'll add that to my to do list.

I am going to try a few more pulls and see if there is any difference.

[HLxDrummer]

Originally Posted by bad84kat

Timing is around 30-32 deg(I dont have access to log right now).O2's were .93v not .94v on all pulls at WOT.Fuel was 91 octane.I have not been driving it alot(using my beater for daily/work) so it took awhile to get down low on fuel.I just filled with 94 octane but it is 10% blend with ethanol right from the pump.I see the guys on E-85 need alot more fuel but are getting more HP due to better knock control.Is this right? I hope 10% is not enough to worry about. I have not done anything with the fuel pump yet.I wa holding off until I get a better pump (leaning towards Supra pump)I have used injector cleaner about 2-3 times a year. I have not changed the fuel filter for quite a while,I'll add that to my to do list.

I am going to try a few more pulls and see if there is any difference.

Timing seems a little higher than normal, but that's more power right? The octane is probably your issue.

Your right about the E85, you need more of it but it's higher octane.

I wouldn't worry about 10%. Any station is allowed to put in 10% without even telling you and most fuel systems can handle this stock. A lot of people run E85 with stock lines/filter but some say it's not a good idea.

The supra pump I think flows a little more, but it's more sensitive to voltage changes (so you should hotwire the pump if you get it). It is also quieter than the Walbro.

[bad84kat]

Thanks for the info HLxDrummer.

I am not looking to be the fastest 3S out there but a strong reliable weekend wonder. I have a set of 450cc dsm injectors I picked up for a song that are in my plans. I was thinking of a FPR/450cc combo to dial things in on the 13T's. I'm not sure what fuel controller to go with.Any thoughts? I think I am a bit of a set it and forget it guy.

What should the timing be normally at WOT? Do you think I would make more power at 12-13psi or is the fact that by the time I get that rpm the boost is already dropping off due to stock 9b's going to negate any psi change at this point?

There was a mention of logging airflow. What does this tell me in relation to the other things I am logging?

[HLxDrummer]

Originally Posted by bad84kat

Thanks for the info HLxDrummer.

I am not looking to be the fastest 3S out there but a strong reliable weekend wonder. I have a set of 450cc dsm injectors I picked up for a song that are in my plans. I was thinking of a FPR/450cc combo to dial things in on the 13T's. I'm not sure what fuel controller to go with.Any thoughts? I think I am a bit of a set it and forget it guy.

What should the timing be normally at WOT? Do you think I would make more power at 12-13psi or is the fact that by the time I get that rpm the boost is already dropping off due to stock 9b's going to negate any psi change at this point?

There was a mention of logging airflow. What does this tell me in relation to the other things I am logging?

That's what I'm all about Fun to drive and reliable. That way you can actually enjoy it instead of worrying about it breaking constantly.

DSM 450's and an AFPR is a good choice for those turbos. You will lose some timing advance unless you really pump up the fuel pressure, and you won't be able to run a ton of boost but you'll still have a fun car and won't have to worry about knock as much.

SAFC is cheap and pretty easy to use (I hear, I've never tuned one) and I'm pretty sure it is set and forget. You can also get an eManange which gives you a lot more options but may be slightly harder to setup and is more expensive. The ARC2 is really easy to tune, but I've heard you have to retune it a little when the weather changes and it's kind of pricey. Hopefully people with these systems will chime in for you.

Stock the timing advance should climb to around 30 degree. I'm not sure exactly how much, but around there.

And on 9B's, turning the boost up will definitely help in power although they won't hold it to redline. You'll make more power down low and the same up top. If your logging your 02's and knock, you can gradually turn up the boost until you either see issues on the logger or you start losing power from the turbos blowing such hot air. I personally wouldn't go past 15-16 psi even if there was no knock and I wasn't running lean.

I don't think logging airflow will tell you much. On the stock setup, past a certain amount of airflow it will just read 1600 or something.