Questions tagged [tuning]
Referring to the act of calibrating the Engine Control Unit (ECU) or Powertrain Control Unit (PCU). This is done for better performance, gas mileage, or to allow the components of the vehicle to run better after modification.
43
questions
4
votes
2
answers
821
views
Do automakers ECU-tune their motors to make new models and versions?
I am considering ECU tuning my car (landcruiser 150 2.8 D4D) and have been reading about the issue. Someone told me that automakers frequently use the same motor across models and versions, yet it ...
- 261
-1
votes
1
answer
219
views
Differential Change does i need to program transmission
I change my rear differential from 2.62 to 3.09 on a RT Dodge but I realized that the rpm is higher so this will cause more fuel consumption. So can i programe it so that the rpm will act the same ...
2
votes
2
answers
91
views
MAF Clamping & Tuning
I am planning on making my normally aspirated engine into a boosted Supercharged Engine using the AEM F/IC 6. From many searches and forum posts I've heard I need to do MAF (Mass Airflow Sensor) ...
- 48
1
vote
0
answers
52
views
Do you still need to tune transient throttle in a direct injection engine?
Transient throttle or acceleration enrichment is a way to model the fuel bubble that's stuck on the intake / valves and doesn't make it into cylinder. So when throttle opened sharply, extra fuel will ...
- 302
1
vote
1
answer
46
views
Tuning kit and timing belt
I have an AUDI Berliner A4, 130 HP, 1.9 TDI, B6, 2002. I bought this tuning kit, and I'm wondering if I should change the timing belt immediately even though it has marched only for 50.000 km, and if ...
- 111
1
vote
0
answers
86
views
How viable is it to decat a Lotus Evora?
The Evora has a secondary decat kit, but no primary decat kit.
How viable is it to fully decat an Evora? The main problem I foresee is tuning. It uses the Toyota 2GR-FE V6 engine. Does this engine ...
- 1,201
0
votes
1
answer
99
views
Turboing a 4B11
I own a 2015 base model lancer with the 4b11 and I want to turbo it so I’m going to get another 4b11 and put all my mods on it and when it’s done pull my stock engine and put the built one in my ...
- 1
1
vote
2
answers
918
views
What kinds of tuning can ruin a car's ability to pass emissions testing?
Suppose I want to tune a car for performance, like doing an ECU re-map for a Toyota Supra.
Could this affect the car's ability to pass emissions testing? If so, how?
And in general, what kinds of ...
- 113
1
vote
0
answers
67
views
Will blow off valve cause compressor surge if set to vent 1 psi higher than desired boost?
Lets say i set my boost controller at 15 psi of boost, and uses a BOV that has 16 psi spring to minimize boost leak, when i close the throttle the intake pressure spikes above 16 psi for a moment then ...
0
votes
1
answer
177
views
ECU tuning exhaust - why?
When a sports exhaust is fitted to a car apparently a re-tune of the ECU is required. For a simple example consider a regular unmodified normally aspirated petrol car which then has a sports exhaust ...
- 484
2
votes
2
answers
798
views
Vacuum never decreases while leaning out carburetor mixture
I have a Rochester Quadrajet 4MV carburetor that has 2 mixture adjustment pins in the front of the carb.
As I understand it, you tune these by continually tightening the mixture screws while watching ...
- 163
0
votes
0
answers
132
views
Can I remove my air box and maintain engine characteristics?
I have recently purchased a Yamaha XSR900. I love pretty much everything about the bike, but I am planning a bunch of customizations to make it my own. Mostly cosmetic. Some not so much.
One of the ...
- 163
11
votes
3
answers
4k
views
How do these similar engines differ so much in power output?
I have a question that is bugging me for a long time. I will take a BMW E46 (3-Series) as an example so that it's easier to ask.
Comparing M3 and E46 330 engines: S54B32 and M54B30, they are both ...
- 111
1
vote
1
answer
520
views
Ride stiffness vs roll stiffness
What is the difference between ride and roll stiffness? Are they separate or closely related?
- 13
0
votes
2
answers
156
views
How to get started tuning ecus?
Now I plan on building my own vehicle soon , and I wanted to know where can I begin learning how to tune a vehicle’s ecu and the necessary programs required to tune ecus on top of the understanding ...
2
votes
4
answers
42k
views
When doing an engine swap , do you have to have a matching ecu
Now I’m familiar with engine swaps and where they can be useful, but the idea behind the engine management system throws me off.If for example , I have a stock engine in my 2008 Chevy impala , then I ...
1
vote
0
answers
165
views
HONDA 125 CLICK Automatic Carburetor tuning?
Hope someone can help me, please: I have a Honda 'Click' 125 automatic. When hot it runs well, but when cold or warming up it will not accelerate, or sometimes will not even speed up enough to engage ...
- 21
2
votes
1
answer
156
views
Can Engine Lugging cause Piston Ring wear?
I just had my oil analyzed from my 2007 335i highly tuned car. I am using the Motul 300v 5w40 and everything seems really good, except for Chromium and Molybdenum. Before this, every value was fine ...
- 21
0
votes
0
answers
2k
views
Is there much benefit from removing catalytic converter? [duplicate]
This is a different question, that question is asking about the implications for an ecu after removing cat. I'm asking why people remove the cat to begin with and specifically what sort of bhp gains ...
- 2,858
6
votes
1
answer
6k
views
Why do modern PCMs prefer MAP over MAF
Why do modern PCMs prefer to use pressure sensors to estimate the air charge going into an engine instead of air flow meters. Eg they typically use a MAP sensor and complex software to estimate air ...
- 193
0
votes
2
answers
2k
views
Engine Starts Screeching at Low RPM and Continues When RPM is Raised
I have a 2003 Honda Civic D17A1 manual, 202k.
I recently rebuilt my cylinder head and replaced all timing components (the timing belt broke), and replaced a bunch of sensors, vacuum hoses, PCV and ...
- 385
2
votes
1
answer
227
views
Can a tune eliminate the need to avoid redlining a cold engine?
As with any car, you'll want to be a little gentle right off the bat when driving a cold car. Not granny driving, but not hooligan either - to let the engine warm up at least to some degree.
My car ...
- 293
1
vote
0
answers
115
views
Replace old Bosch computer with Motronic?
I have a 1996 B5254S engine that came with a Bosch LH-3.2/EZ-129K computer. The next model year 1997 they started using the Motronic 4.4 computer for this engine.
Can I just switch out the Bosch for ...
- 1,201
3
votes
3
answers
729
views
Tuning cars from the 90's and prior
Introduction (for those who dont care):
Hi. I'm currently developing a drag racing game in the style of the beloved Street Rod and I'm kinda new to cars in general. Im reading about tuning as is the ...
- 277
2
votes
2
answers
125
views
Is it possible for me to see oxygen, caused by valve overlap, in the exhaust gases?
Recently I put my car on the 4 gas analyser, and it gave me these results at idle:
CO2: 10.64 %
CO: 4.98 %
O2: 1.94 %
HC: 148 ppm
Lambda value: 0.93/13.7AFR
I have to mention that it concerns ...
- 2,964
2
votes
1
answer
177
views
Nissan Sentra vvl
I'm driving sti 2 liter with vvl engine. I recently tuned my car. It has a dictator management.
Will disconnecting my battery affect the settings done with tuning?
- 21
1
vote
1
answer
826
views
2002 kawasaki zx6r stutters
My 2002 Kawasaki stutters below 4000 rpm when in neutral while giving it throttle it also does the same thing while in gear but if I raise the rpm just before take off it shoots out the hole with no ...
- 11
2
votes
0
answers
280
views
1992 Ford F-250 4x4 5.8l 408ci stroker tuning questions
I have a 1992 Ford F-250 4x4 w/a 5.8l blocked 408ci stroker attached to a ZF 5 speed tranny running 3.55 gears. On the engine sits a set of 64cc chambered, 190cc intake runner, 70cc exhaust runner, 2....
- 21
4
votes
3
answers
5k
views
How can a car be tuned for low/mid/high end torque?
When someone mentions tuning the car for low end torque, do they mean changing something mechanical (gear ratios/final drive) or something that has to do with the ECU ? if so what is done exactly to ...
- 2,770
3
votes
3
answers
284
views
Is there a viable option for updating OBD-I to OBD-II in order to increase possibility of engine tuning?
I've been told this is a terrible idea and just wanted greater confidence even though the warning against has been taken. I want to be able to fine tune a 1990 car with an OBD-I port in addition to ...
6
votes
3
answers
2k
views
Please help with my Intake for Opel Corsa 2014
I have an Opel Corsa D 1.4 turbo. I have bought a Conic Air Filter, but I need to know what I can do to make a better installation. I don't think that I have a good one, because is too close to the ...
9
votes
3
answers
50k
views
What is the benefit of Forged Internals in an engine? Pistons, etc
I've heard of these for years and not fully understood the benefits, can someone elaborate? Frequently the vehicles with forged internals have serious boost pressures, but I've also heard of naturally ...
- 192
2
votes
1
answer
143
views
Tuning an ancient carbureted Honda motorcycle
I was in an accident recently. Tboned by a minivan at an intersection. Totaled my nice bike.
My buddy gave me an old rust bucket he had laying around just to get me to work for a few weeks until I ...
- 543
3
votes
1
answer
619
views
Reprogramming a Magneti Marelli Microplex MED604C
I'm interested in reprogramming a Magneti Marelli Microplex MED604C ECU for the ignition of an uno turbo, but I can't seem to find any documentation on this? I'm new to ECU remapping, and my ...
- 145
6
votes
3
answers
423
views
What causes an engine idle to increase briefly?
I have an 82 Honda 450 Nighthawk motorcycle that I'm rebuilding and I need to tune/balance the carbs. I have them bench-balanced and reset the idle screw on both. Now it runs a lot better, but every ...
- 824
4
votes
1
answer
349
views
How inaccurate is the stock wideband 02 sensor in the SG9 Subaru Forester XT at WOT
As the title suggests, I'm trying to get concrete data on how inaccurate the stock wideband O2 sensor is in the Subaru Forester XT (MY06 to MY08). I am attempting to create a custom map for the car ...
- 8,848
5
votes
1
answer
313
views
Rebuild for longevity
So, I have a question about a 98 2.0 rt neon. I am going to get a top/bottom rebuild on it, the block has 260000 km on it. I have seen rebuild kits on the market anywhere from 300 dollars (ebay ...
- 151
1
vote
0
answers
931
views
BMW 320i 1992 Gearbox in Sports Mode [closed]
My cas is a BMW e36 320i, with an automatic gear box. The gearbox has three modes, Economic, Sports and ICE. When in Economic mode, The gearbox switches smoothly between the 5 speeds, however, the ...
- 165
1
vote
3
answers
336
views
Can reading from the ODB port interfere with a custom STO map?
I recently had a full freeflow system fitted to my Opel/Vauxhall Astra Turbo Coupe. Along with this, I had a stage 1 STO map done to take full advantage of the new exhaust characteristics. At any rate,...
- 8,848
1
vote
1
answer
8k
views
What are the differences between multi-link suspensions and double-wishbone suspensions?
There are a multiple of different kinds of suspension, multi-link suspensions and double-wishbone are popular in some performance groups. What are the main difference between these two? What ...
- 1,473
1
vote
2
answers
3k
views
Add Muscles to my Tata Nano Car [closed]
Any Suggestions for Tuning my Tata Nano car into getting a muscle look and also an increase in power??.. Thanks in Advance.
user4804
1
vote
5
answers
2k
views
Why didn't tuning box or remap work on my mondeo st tdci
I brought a tuning box a few months ago. When I fitted it, it didn't work so I sent it back. They tested it and it was working fine, so I tried it again, but it wouldn't make my car any quicker.
So I ...
- 11
14
votes
3
answers
31k
views
How to begin learning engine tuning?
Quite simply, I want to begin tuning and modifying automotive engines for hobby. I have always been fascinated with cars, and I want to become knowledgeable in as many aspects of car tuning as ...
- 241