NA tuning

obi_waynne

Administrator
Staff member
Moderator
Points
887
From
Deal, Kent UK
Car
A3 1.4 TFSI 150 COD
The best mods for a car engine are as follows.
Internal work yields the biggest gains, head work like porting polishing and 3 angle valve jobs will maximise the airflow and raise the power.

If you want to go to the max then cryo treat the block, get it rebored and look into blueprinting and balancing as well. You'll also need stronger internal parts if you are looking at a big power hike so forged rods etc.. are the order of the day.

Bigger valves are an obvious add on but not all engines are suitable as it depends how close together the OEM valves are.

A fast road cam will yield good power gains, especially in the top end of the rev range. Don't go mad though a profile of up to 270 degrees will give the best gains without the engine becoming cammy (lumpy tickover at low RPM).

The most popular power mods are induction kits (which are questionable as power mods but they can sound nice if that is your sort of thing) and sports exhausts with sports catalysts or decats.

To keep the car legal I'd recommend a sports catalyst rather than a decat.
The last mod should always be a remap as this will allow you to fully realise the power gains on offer from your mods. Turbo cars respond very well to remaps.

It's worth having a read of the articles on www.torquecars.com/tuning for more information on these mods and what the terms mean.
 

Loz

Torque King
Points
252
From
Wolverhampton, U.K.
Car
MX-5
If I was tuning a NA engine I'd go for a ported head with some lumpy cams and depending on the original compression maybe a dirty head skim too. Breathing would be through a set of individual throttle bodies controlled by an aftermarket ecu (emerald, omex etc ).
Next add an improved manifold and exhaust system and while we're at it dump the fly wheel and fit a lightened one along with a good quality clutch.

Then all you have to do is hide the fact you've just spent 3 or 4k on engine mods from the missus!: lol:
 

Charliep

Torque Junkie
Points
22
From
Thurrock, UK
Car
Alfa GTV & 33
Whenever I start development on a car, I make sure that the air I need goes in, which starts with the air intake.

Next question is, where you want to finish in terms of performance, driveability and finances.
 

kiapower

Newbie
Points
11
From
U.S. Artesia , NM
Car
09 kia spectra ex
well guys i've got a 09 kia spectra 2.0L i've already put a short ram intake on it and a 4-1 header but now kind stuck cant find anywhere to get cams or any other performance parts im bout to put 2 1/4" custom build exhaust with performance muffler if anyone can help please contact me on here.
 
Last edited by a moderator:

T9 man

TC ModFather
Moderator
Points
1,137
From
London, UK
Car
Saab 9-3SS T9
well guys i've got a 09 kia spectra 2.0L i've already put a short ram intake on it and a 4-1 header but now kind stuck cant find anywhere to get cams or any other performance parts im bout to put 2 1/4" custom build exhaust with performance muffler if anyone can help please contact me on here.
Greetings and Welcome To Our TorqueCars Forum My Friend! :)
 

turbonutter69

TC ModFather
Moderator
Points
642
From
Alone in the dark.
Car
Insignia SRI.
Hello and Welcome to TorqueCars.:bigsmile:
Hope you enjoy your time with us.


well guys i've got a 09 kia spectra 2.0L i've already put a short ram intake on it and a 4-1 header but now kind stuck cant find anywhere to get cams or any other performance parts im bout to put 2 1/4" custom build exhaust with performance muffler if anyone can help please contact me on here.
 
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