TorqueCars power gain calculator (NA (naturally aspirated) engines)

"Absolute Power corrupts Absolutely"

Please note that this calculator is only an indication of relative gains because the specific parts used, and condition of car will vary dramatically and affect any expected gains. 

It was intended to show the investment of time and money with regard to your expected power gains.

This calculator does not take into account the condition or age of a car. It is representative of a typical hot hatch and is intended for fun use only no claims or quotes can be verified as accurate for your car and are based on average bhp increase percentages from our data.

Generally speaking if you tick more boxes the calculator will be less accurate (2 -4 boxes should be fairly accurate).

This is a NA (naturally aspirated) engine calculator for TURBO engines click here

Click here if you want to calculate your potential 1/4 mile times from the bhp.

Please use the feedback form below to help us make this more accurate, tell us your make model and the a rolling road power readings!!! The feedback we've received so far has proved invaluable.

Please Check out my YouTube channel, we're regularly adding new content...

PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. I do not charge you to access this website and it saves most TorqueCars readers $100's each year - but we are NON PROFIT and not even covering our costs. To keep us running PLEASE Donate here

If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile.

Feedback - What do You Think?

Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine.

Help us improve, leave a suggestion or tip

Your Constructive comments on this article, I really want to improve this article with your help and suggestions.


Please watch this video and subscribe to my YouTube channel.



7 Responses to “Engine mod bhp increase calculator”

  1. jason says:

    hey lads i have a mitsubishi mirage mivec i was wondering wat bhp has increased with the following extras after its 175bhp standard does the following give major bhp increase piggy back ecu,hks induction kit,air feed jasma exhaust system, D series apexi rsm controller, turbo timer and also 15inch lightweight oz racing alloys

  2. Steve says:

    The turbo timer and the wheels will be the biggest upgrades.

  3. Harry says:

    I have a mk5 vw golf 1.6 fsi. The power calculator on site said that with a turbo added (car has not turbo currently)the bhp will go from 115 to almost 150 !! So I am ver keen to fit said turbo.

    Is there anyone out there who can tell me what cheap turbos are suitable for my car ???

  4. Frank burjan says:

    vectra 3.2

    395nm max with exhaust and 100 cell cat on dyno

    I think about 435nm now with extractors.

    How many extra kilowatts or nm can I expect wioth a pipercross induction kit?

  5. Stephen says:

    Very Good Base Calculator, Should Have An Option On Increase Of Power Per 1mm/.040″ Oversizes On Bores And Strokes 🙂

  6. Ryan says:

    Why don’t you have dodge?

  7. TorqueCars says:

    Sorry about that, I’ve added it for you now.

Member Benefits

Join our forum today and benefit from over 300,000 posts on tuning styling and friendly car banter.

You will also have full access to the modifed car gallery, project car updates and exclusive member only areas.

(All car owners of all ages and from all countries are welcome).


BMW 335i - 2021 COTY

We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide

Tips for N54 Tuning

Tips for N55 Tuning

Popular articles

Diesel tuning
ECU Remapping
double clutching
Induction Kits
Customize a car
Tuning Chips
Modified car insurance
Track day insurance
Remapping Diesels
MPG calculator
DPF unblocking tips
Horizon 5 tuning


Surge Tank

Fuel surge tanks
Read more...

Vernier Pulleys

Vernier pulleys
Read more...

Alloy Wheels 2

Choosing Alloys.
Read more...

Split Bonnets

Creating a custom self opening split bonnet or split hood.
Read more...

Storing Car

Storing a car tips and hints
Read more...

2007 Car News

Review of 2007 car related news and developments.
Read more...

MPG Calculator

MPG calculator UK miles per Gallon – calculate MPG
Read more...