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Posts Made By:
arghx7
Forum:
Software Tuning
12-05-2015, 10:14 AM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
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
PI : DI Ratio Discussion
Views:
74,575
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
AVCS - Intake and Exhaust Timing
Views:
109,667
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
PI : DI Ratio Discussion
Views:
74,575
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:
Engine, Exhaust, Transmission
08-29-2015, 12:02 AM
Replies:
16
Bronco bustin' -- what happens when you put 87 octane in a twin
Views:
5,077
Posted By
arghx7
The spark retard makes the combustion unstable....
The spark retard makes the combustion unstable. That causes the surging.
Forum:
Engine, Exhaust, Transmission
08-13-2015, 12:27 AM
Replies:
15
Air/Fuel Ratio for Stock FRS @ High RPM
Views:
17,308
Posted By
arghx7
The AFR is that rich under high speed and heavy...
The AFR is that rich under high speed and heavy load to keep the cat from experiencing accelerated aging. It's to comply with EPA longevity requirements.
It's not a big deal if you do. It...
Forum:
Forced Induction
03-31-2015, 01:30 PM
Replies:
79
Breaking the Silence
Views:
33,529
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
FRS / BRZ Intake Manifold - Development Thread - FT-86SpeedFactory by Velox
Views:
293,747
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
Poll:
Prospects of ditching drive-by-wire throttle
Views:
8,988
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:
Engine, Exhaust, Transmission
12-09-2014, 10:05 AM
Replies:
27
Poll:
Prospects of ditching drive-by-wire throttle
Views:
8,988
Posted By
arghx7
it would be a lot easier and cheaper to try and...
it would be a lot easier and cheaper to try and change the throttle mapping on the stock ECU than to even attempt to run this engine with a throttle cable while still keeping the AVCS, direct...
Forum:
Software Tuning
12-03-2014, 04:21 PM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
Posted By
arghx7
You have to start thinking in terms of crank...
You have to start thinking in terms of crank angle degrees and injection window. On PFI, the fuel can build up on a closed intake valve or spray into an open intake valve. For open valve injection,...
Forum:
Engine, Exhaust, Transmission
11-28-2014, 03:55 PM
Replies:
221
World's first FT86 Anti-Reversion,(A/R) Header
Views:
68,970
Posted By
arghx7
We're getting off topic here but yes you are...
We're getting off topic here but yes you are right, it was only used on the early 6 port induction systems before they were operated by smog pump (1989-1991 non turbo) or electric motor (Rx-8 Renesis...
Forum:
Engine, Exhaust, Transmission
11-18-2014, 04:36 PM
Replies:
221
World's first FT86 Anti-Reversion,(A/R) Header
Views:
68,970
Posted By
arghx7
The effectiveness of this mod would be a lot...
The effectiveness of this mod would be a lot easier to prove with more equipment, something that can't really be done on a hobbyist budget. You would need an engine dyno with crank angle resolved...
Forum:
Software Tuning
10-30-2014, 03:31 PM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
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
PI : DI Ratio Discussion
Views:
74,575
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
What Stand Alone's are Available?
Views:
8,452
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:
Engine, Exhaust, Transmission
09-04-2014, 12:43 PM
Replies:
6
delete please
Views:
995
Posted By
arghx7
http://www.ft86club.com/forums/attachment.php?atta...
http://www.ft86club.com/forums/attachment.php?attachmentid=89850&stc=1&d=1409848983
....
Forum:
Forced Induction
08-26-2014, 12:22 PM
Replies:
26
Ways to disable turbo ?
Views:
7,718
Posted By
arghx7
so you want to go through all this hassle because...
so you want to go through all this hassle because of some knock retard that is probably just noise?
There's nothing "wrong" with running around on an engine with the wastegate wide open, although...
Forum:
Software Tuning
08-19-2014, 03:15 PM
Replies:
13
Understanding Knock and Preignition: The Combustion Perspective
Views:
10,694
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
Understanding Knock and Preignition: The Combustion Perspective
Views:
10,694
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
08-12-2014, 09:53 PM
Replies:
20
Why does an e85 tune offer more power?
Views:
7,035
Posted By
arghx7
btu/gallon or btu/lb are oddball imperial units...
btu/gallon or btu/lb are oddball imperial units that are very difficult to work with. the standard is the SI unit of megajoules (a measure of energy) per kilogram (a measure of mass), the lower...
Forum:
Software Tuning
08-07-2014, 05:57 PM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
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
PI : DI Ratio Discussion
Views:
74,575
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, 12:33 PM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
Posted By
arghx7
Here's an exercise. Go into your DI firing angle...
Here's an exercise. Go into your DI firing angle map and set the whole map to 260. Take some datalogs and see how it runs.
Forum:
Software Tuning
08-07-2014, 12:07 PM
Replies:
270
PI : DI Ratio Discussion
Views:
74,575
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
PI : DI Ratio Discussion
Views:
74,575
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
08-05-2014, 11:10 AM
Replies:
11
Which clutch to buy for FI?
Views:
3,917
Posted By
arghx7
just remember that puck clutches usually don't...
just remember that puck clutches usually don't have a long life.
Forum:
Engine, Exhaust, Transmission
07-30-2014, 09:29 PM
Replies:
12
ACT 6 Pug Problems, anyone have it like me?
Views:
3,680
Posted By
arghx7
You do know that puck clutches are not built to...
You do know that puck clutches are not built to last right?
Forum:
Engine, Exhaust, Transmission
07-30-2014, 09:27 PM
Replies:
33
Sound deadening for Exhaust noise
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:
Engine, Exhaust, Transmission
07-28-2014, 08:56 AM
Replies:
23
Building my motor I need help on which pistons and rods and which ones to get at a
Views:
5,005
Posted By
arghx7
Please provide more details. What is the rest of...
Please provide more details. What is the rest of your plan to get there? Custom turbo setup?
Showing results 1 to 30 of 500
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