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.

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BOSCH EDC development

I was wondering if someone has any idea how those BOSCH EDCs are developed? Which IDEs are used, and what are the possible SDKs? I would really like to develop and compile a code that will look ...
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Ride stiffness vs roll stiffness

What is the difference between ride and roll stiffness? Are they separate or closely related?
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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 ...
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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 ...
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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 ...
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1answer
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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 ...
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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 ...
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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 ...
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2answers
270 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 ...
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1answer
142 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 ...
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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 ...
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180 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 ...
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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 ...
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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?
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422 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 ...
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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....
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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 ...
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255 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 ...
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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 ...
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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 ...
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1answer
106 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 ...
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1answer
455 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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,...
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1answer
7k 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 ...
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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.
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5answers
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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 ...
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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 ...