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Search took 0.10 seconds. Search: Posts Made By: arghx7
Forum: Software Tuning 12-05-2015, 10:14 AM
Replies: 270
Views: 74,507
Posted By arghx7
You're giving Subaru too much credit. It's not...

You're giving Subaru too much credit. It's not that smart, or at least, not that anyone has proven. Unless someone here wants to link to somewhere showing the load estimation being related to fuel...
Forum: Software Tuning 12-05-2015, 09:43 AM
Replies: 270
Views: 74,507
Posted By arghx7
There's a lot of discussion here among different...

There's a lot of discussion here among different people and scenarios that I'm trying to unravel.

First question: is this a matter of the fuel trims moving around more than would be ideal or is...
Forum: Software Tuning 12-01-2015, 10:54 PM
Replies: 274
Views: 109,559
Posted By arghx7
cross posting from the other thread: The...

cross posting from the other thread:

The AVCS intake side has the negative values thambu19 and others were talking about because it is a mid lockpin AVCS. That means the intake side can retard,...
Forum: Software Tuning 12-01-2015, 10:51 PM
Replies: 270
Views: 74,507
Posted By arghx7
I'm not too active on this forum lately but I did...

I'm not too active on this forum lately but I did get caught up with this thread, as these things tend to die and suddenly get revived.

The AVCS intake side has the negative values thambu19 and...
Forum: Forced Induction 03-31-2015, 01:30 PM
Replies: 79
Views: 33,524
Posted By arghx7
Sorry for not getting back to you sooner, I'm not...

Sorry for not getting back to you sooner, I'm not so active on this forum these days. If the logic is, "this DI system wasn't optimized for a turbo, it's easier to just get rid of it when you go...
Forum: Engine, Exhaust, Transmission 03-20-2015, 03:15 PM
Replies: 733
Views: 293,660
Posted By arghx7
I'm a couple days late to this... ...

I'm a couple days late to this...



Carbs and throttle body injection/distantly placed multiport have more cylinder to cylinder variations in combustion, because now you need to balance...
Forum: Engine, Exhaust, Transmission 12-09-2014, 06:27 PM
Replies: 27
Views: 8,980
Posted By arghx7
I'll say this. The final generation of throttle...

I'll say this. The final generation of throttle cable controlled engines were generally a lot better in terms of reliability and maintenance. The EJ205 WRX is included in that. Lots of 90s and 80s...
Forum: Software Tuning 10-30-2014, 03:31 PM
Replies: 270
Views: 74,507
Posted By arghx7
^ Ford ran a bunch of experiments with just such...

^ Ford ran a bunch of experiments with just such a setup. You're basically injecting ethanol as a type of octane booster or racing fuel. If you just want to make power in a simple way (don't care...
Forum: Software Tuning 10-27-2014, 11:03 AM
Replies: 270
Views: 74,507
Posted By arghx7
Yes, if the rail pressure is high enough, and the...

Yes, if the rail pressure is high enough, and the spray targeting is appropriate for the injection timing. Raising the rail pressure increases parasitic losses though. Even good spray targeting has...
Forum: Software Tuning 10-20-2014, 09:49 AM
Replies: 29
Views: 8,442
Posted By arghx7
Take a step back for a second. The mass...

Take a step back for a second. The mass production ITB's out there with electronic throttle have the multiple butterflies driven by a single motor per bank, with a common shaft. Where are you going...
Forum: Software Tuning 08-19-2014, 03:15 PM
Replies: 13
Views: 10,686
Posted By arghx7
It's more complicated and subjective than you...

It's more complicated and subjective than you think. Before the knock control system even exists try watching a bunch of grown ass men with a gazillion dollars worth of equipment argue over whether...
Forum: Software Tuning 08-18-2014, 10:42 AM
Replies: 13
Views: 10,686
Posted By arghx7
Understanding Knock and Preignition: The Combustion Perspective

You've probably read a lot of stuff on the internet about knock, and maybe preignition. You know that they're undesirable for a spark ignited combustion engine - they can make noise, they can damage...
Forum: Software Tuning 08-07-2014, 05:57 PM
Replies: 270
Views: 74,507
Posted By arghx7
Let me point out that combustion stability...

Let me point out that combustion stability perception is kind of relative. When you see a V8 camming, it's having poor combustion stability at idle and low load. It still sounds cool though, even if...
Forum: Software Tuning 08-07-2014, 12:42 PM
Replies: 270
Views: 74,507
Posted By arghx7
You can't really see this accurately without...

You can't really see this accurately without drilling the heads for combustion transducers, but keep in mind the difference between spark timing, combustion phasing, and combustion speed.

I'll...
Forum: Software Tuning 08-07-2014, 12:07 PM
Replies: 270
Views: 74,507
Posted By arghx7
You'd think an engine makes some amount of torque...

You'd think an engine makes some amount of torque but that's constantly jumping up and down. It's usually worst at cold start, when pulling spark to reduce knock, and part load where it's being...
Forum: Software Tuning 08-05-2014, 04:34 PM
Replies: 270
Views: 74,507
Posted By arghx7
We know the DI start of injection, assuming those...

We know the DI start of injection, assuming those are reverse engineered correctly (the numbers really represent the physical degrees), but we don't know the PFI end of injection or the DI end of...
Forum: Engine, Exhaust, Transmission 07-30-2014, 09:27 PM
Replies: 33
Views: 13,462
Posted By arghx7
http://www.ft86club.com/forums/attachment.php?atta...

http://www.ft86club.com/forums/attachment.php?attachmentid=86593&stc=1&d=1406770052

.....
Forum: Software Tuning 07-01-2014, 09:57 PM
Replies: 44
Views: 11,810
Posted By arghx7
A throttle (which is a butterfly valve) is a...

A throttle (which is a butterfly valve) is a non-linear device. Those who think that somehow they were linear on cable throttled engines are remembering with rose-colored glasses.

So here's the...
Forum: Engine, Exhaust, Transmission 05-03-2014, 01:59 PM
Replies: 36
Views: 31,618
Posted By arghx7
I apologize if my previous post was too long or...

I apologize if my previous post was too long or too technical and was thus skipped over by many people. The reason why it wasn't included was that the oil temperatures simply do not get high enough...
Forum: Engine, Exhaust, Transmission 05-02-2014, 01:26 PM
Replies: 36
Views: 31,618
Posted By arghx7
I can tell you from a lot of accumulated...

I can tell you from a lot of accumulated knowledge with aluminum block engines, anything under about 135C or roughly 270F is safe--give or take some degrees. Is it optimal for power? No, but it's...
Forum: Engine, Exhaust, Transmission 04-24-2014, 08:07 AM
Replies: 23
Views: 11,688
Posted By arghx7
I've deleted charcoal canisters and vented evap...

I've deleted charcoal canisters and vented evap lines on older cars. It had a noticeable smell on a hot day when the fuel heats up, kind of like an open vent on a gas can for a lawn mower. This was...
Forum: Engine, Exhaust, Transmission 04-11-2014, 08:16 PM
Replies: 45
Views: 17,584
Posted By arghx7
I have responded in other threads that the torque...

I have responded in other threads that the torque dip (or even just a flat spot) is common on N/A direct injected engines. It's more on performance-oriented engines with a higher revving character,...
Forum: Forced Induction 04-11-2014, 10:37 AM
Replies: 11
Views: 7,456
Posted By arghx7
As I've mentioned in other threads, the limiting...

As I've mentioned in other threads, the limiting factor on the rods may be the peak cylinder pressure. That's determined by knock events, and in the case of E85 operation spark timing. I know that...
Forum: Software Tuning 04-10-2014, 04:11 PM
Replies: 17
Views: 8,728
Posted By arghx7
This is a very valid concern and I'm glad you are...

This is a very valid concern and I'm glad you are thinking about this issue rather than just accepting a solution blindly. Consider this though. There are two solenoids. One is the evaporative...
Forum: Software Tuning 04-07-2014, 04:05 PM
Replies: 4
Views: 1,182
Posted By arghx7
Try calling Turbo Time in Cary (Raleigh area)

Try calling Turbo Time in Cary (Raleigh area)
Forum: Software Tuning 04-04-2014, 06:50 PM
Replies: 39
Views: 11,617
Posted By arghx7
For what it's worth, I did it a long time ago on...

For what it's worth, I did it a long time ago on a 2005 Legacy GT with an older version of Cobb Accesstuner. There were some tables labeled as closed loop target AFR on that version (this was before...
Forum: Software Tuning 04-03-2014, 09:00 PM
Replies: 311
Views: 114,966
Posted By arghx7
I've mentioned this in other threads but I will...

I've mentioned this in other threads but I will bring it up again. That pesky tip-in knock that doesn't seem to be affected by fuel quality or spark advance is most likely the result of the signal...
Forum: Forced Induction 03-27-2014, 06:33 PM
Replies: 48
Views: 21,722
Posted By arghx7
Can we get some kind of baseline comparison with...

Can we get some kind of baseline comparison with the stock heads, preferably overlaid with the stock lift profile? You're listing at .500 inches of lift and I don't even know if the stock cams have...
Forum: Engine, Exhaust, Transmission 03-11-2014, 07:01 PM
Replies: 71
Views: 209,721
Posted By arghx7
So I tracked down the technical paper that is...

So I tracked down the technical paper that is specific to this FA20 engine, and it clears up a few things (see end of post where I have attached it). The spray pattern appears to be a single fan...
Forum: Software Tuning 03-09-2014, 05:20 PM
Replies: 28
Views: 10,208
Posted By arghx7
as @moto-mike...

as @moto-mike (http://www.ft86club.com/forums/member.php?u=23466) is saying, in the end you have to do what's practical. How is the dyno and the knock reading responding to whatever AFR you are...
Showing results 1 to 30 of 178
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