Let's say I installed a Bolt On Turbo on my NA car, what are the thing I have to take extra care?

As compare to Supercharged, which of it is easier to take care of?

As far as I know, radiator has to be upsize according to the turbo size. Is it true?

not as easy as that.. all tubing needs to change due to additional routing of airflow, then cooling systems also will be added (intercooler), then need to remap your car / tune it for larger horse power, and also car will be hotter overall as turbo creates alot of heat under the bonnet. Supercharger similar... basically both systems are trying to compress more air into engine cylinder to create more power.. and that creates more heat. Main difference is that Turbo uses exhaust gas to ram more air into the piston cylinder and Supercharge uses a belt driven mechanism achieve the same thing.

Lastly difference is that supercharger has more immediate response but Turbo, depending on size of turbo and also tuning. If you want maxpower, there will be a turbo lag (slower turbo response - slower pickup acceleration). If you want response, (usually uses smaller turbos - and tuned with less pressure) you will get good pick up response but no high end power.

The thing now is, I'm getting a second car with turbo mod. I'm planning to get a stock one then supercharged it but since someone is selling it with "reasonable" price, I'm considering it.

I haven't view the car but I noticed the radiator still stock and no additional intercooler on it. Mileage is pretty low, I afraid this car is "incomplete" and lots of routing mod required to drive long distance.

you also have to upgrade the brakes, absorbers

Better check proper. But usually if there is a turbo charger, all the tubing will be there. Cos the car cannot function without it.

No intercooler? this sounds like a work-in-progress than a completed project. My guess is you will need to fork out more money to make it run reliably.

Brakes already upgraded to 4Piston & adjustable absorber.. Should be sufficient to handle the speed.

Let's say all tubing is there, do I need to upgrade the radiator size?

Apart of that, I'm first time on turbo/sc car. What are the things I have to take extra care except engine oil? Coolant has to be different from NA car?

theoratically you can run without an intercooler, no issues but.... hot charged air isnt gona be efficient.
whatsmore, If its got the stock internals(im assuming high compression), you can only run that little boost before everything turns on you.

how bout fueling and the electronics? dont tell me stock too??

Engine is stock. Seller didn't mention anything about the fuel system, I presume the injectors and fuel hose are all stock. I'm not sure if the ICU has tuned or flashed.

I'm going to meet him up tomorrow, hence I wish to gather whatever information before speak to him.

look at the car, testing it is all good and fine, but given your general description of it so far? personally, would not buy it. Want a turbo car, get one that has a properly built engine or get one that has an engine that was designed with a turbo.

There is no point aftermarket BOT without intercooler.

Either the owner ran out of funds or it's not complete yet. I bet it's still running on stock ECU with stock AF map too.

yeah, if it was a completed project, the cost of the intercooler would be so little given the effort put in to bot the car. without an intercooler, you can only run so little boost. Makes no sense not to run an intercooler.

If car originally NA then add on turbo, then you may need to upgrade radiator. Engine can get very hot hence added cooling is good.

Next is the intercooler which is a separate system from the engine. The more efficient the intercooler, the better. Also, engine oil also needs to be synthetic (as it can hold optimum thickness (viscosity) at higher temperature; plus engine oil change will be quicker (i.e. if usual oil change is 10K with syn oil, then with a turbo, you probably want to change between 5k-7k km per oil cycle. But that is only if you have tuned turbo for higher psi / bar pressure) The higher the more power, but also more turbo lag and more heat.

Other things need to look at, are Blow Off Valves (or By Pass Valves), High Pressure Fuel Pump, Re Mapping / Tuning of Car (as you are making the engine deliver more power, hence ignition timing needs to be tuned), you may also only use RON97 if the car is running on higher compression ratios. Other things has already been mentioned like suspension, brakes calipers & Rotors, turbo timer).

Additional / optional are oil catch cans, engine mounts, LSDs, sway / strut bars (this can be important if the flexes too much during extreme acceleration and cornering).

I will try to check it out thoroughly. Because by the photos, I can't see any intercooler in the bumper nor on top of the engine.


Thanks for tips. I think the seller did not complete the project accordingly.

Just get a car with turbo from factory , these bot are money hole and reliability nightmare , pick and choose any Volkswagen and done

previous and current HP diff?

upgrade brake system, good tires with better grip. (this manyak important, can fast cannot stop = gg)

Buy a stand alone ecu... get use to the ecu software,and learn how to use it. Learn basic of ecu tuning...


Then progress from there. This is my advice for those who wanna start to learn more about turbo....ecu tuning will make or blow an engine...

My 4g92p with stock internals manage to take boost up to 1bar from kul to johor none stop. My ecu is just aftermarket link atom..i learn alot from my tuner,and many thanks to my tuner who is willing to teach me too..

Not sure, I go through trader. The only thing I know from test drive is current turbo setting up to 1+bar.

Brake 4P, tyre potenza for 17"rim. Not an issue already..

I believe some of the parts have replaced with cheaper one, need to cash in.

Mind to intro your tuner to me? I need trusted workshop to examine and spend accordingly.

Hi sifus and gurus.
Sorry for bringing up back an old post.
I recently bolted on RHF5 to my axia.
I found there are certain plastic parts and wiring which are close to the "hot side" of turbo macam suda ada change shape.
I want to install a blanket on the turbo but not sure what size. I measured up the hotside housing and its bout 4inch+. I checked alot of online shops selling sizes T1 T2 T3 etc etc.
But i can't find what are the measurements for those sizes. Anyone can help?
I also plan to custom make some heat shield cause my aircond piping and rad super near the downpipe outlet from turbo.

Its just not worth the hassel. If not done well ,it will be a money hole.

2012 Peugeot 408s are going for $20k. Very good workshops in Klang Valley. They are able to sort out all issues. Btw,this model is quite reliable,unlike older Pugs!

Excellent family sports sedan with superb driving dynamics.

This post has been edited by SKYjack: Sep 3 2019, 10:23 AM

Suggest u return to your foreman/workshop who did the bot to assist on the custom made heat insulator for the turbo and the turbo manifold.

Didn't have such problem when i 'bot'ed the 1st generation crv.