Hi people just wondering the G-tec 1 tuning chip how big is the noticeable performance gain?. Does it make you go wow or can't you really tell?.

Cheers Ron

hi 20-30 bhp extra. It is a noticeable difference. I have just flogged my old car and took out the gtec 1 so PM me if you want to buy it.

very noticeable... fit the boost guage and prv and RR the car and you re all done for less than 100 quid and it must be the cheapest 35 hp you ll ever gain....

It does make a big difference as I have one in my car.

It will also be a good idea to fit 1 grade colder spark plugs along with a boost gauge.

You may or may not need a PRV, but it depends on how the car boosts on the original boost valve.

I had the wow factor when I first fitted one

The problem is you get used to it very quickly and then start wondering what you can do next

The G-Tec 1 mod is easy and cheap, all the next step ups are both expensive and complicated.

very good mod,but as said get a prv and boost gauge too.
had one on my old one and was very suprised with the power difference, will be fitting one to my new one when I can.

Cheers for the feedback much apreaciated!.

Also depending on the age of your clucth budget for a new one!

I got the g tec and was amazed a few months later my aged clucth had, had it!

Still no regrets on it though!

It is a very good and proven chip on hundred of cars. Just check fueling. Works best with an EBC...you can set it for a nice progressive boost without load to the clutch.

EBC cost much more than PRV but in the long run will work much cheaper than a new clutch job.

I've heard there are 2 types of GTEC 1, the GTEC 1 and the HF version.

Can you run 1.2 bar on either?

Is there a definite need for a PRV/EBC, doesn't the boost get adjusted by the stock ecu?

Cheers guys!

Both chips are good for 1.2 bar - though you should get the fuelling checked properly on a rolling road.

Gtec 2 runs more advance - so you need an uprated IC, and V-power to run it.

The EBV can struggle with 1.2 bar - making the boost fluctuate. This would mean that you need an external form of controlling the boost.

My local tuner suggest some form of piggyback ECU as he claims they are cheaper than full EBC. Any thoughts?

Yes - go to someone that knows what they are talking about.

How do the RR operators adjust fuelling if it is out? Has anyone experience of this?

unless its some one like flee, they don't..

so what happens if the RR operator says the car is running too rich or too lean? How do you get this adjusted?

If its slight rich its better. But if your running lean get a wiring mod done for your fuel pump and check that your air filter, MAF and oxygen sensors are in good condition. If you intend to run over 300 HP then get an uprated fuel pump.

Flea can either live map the ECU, or you can use a piggyback ECU such as a unichip to do so.

A rolling road run is a fuelling and power check - mapping is a different prospect.

You need an uprated pump before you get to 300bhp. The car should not be fuelling leaner than 11's - particularly at the top end.

You still have the option of various GTECH chips to choose from if your fuelling isn't right.

Mapping is the better move but not always required for basic power levels.

Sorry guys, I'm trying to understand all this business about getting fuelling checked on a RR once the Gtech is fitted. What generally happens? Are most cars okay, or do the RR's pick up lots of fuelling problems, and if so, what do you do about it if a problem is flagged up?

I have a GTec sitting in the drawer ready to be fitted. Health check is okay apart from a cheap pattern exhaust - which maybe choking power a little, and an atmospheric dumpvalve as opposed to recirc. Once these two are changed, I'll fit the Gtec and book the RR. What I want to know is what happens if a problem is found with fuelling? aiming long term for around 300bhp in progressive stages.

If you want 300bhp then personally I would not bother with the chip until I wanted to go the whole hog, then I would get the car mapped.

If you have a fuelling issue on the RR then:

1. You have an issue that is not realted to the chip, e.g. fuel filter clogged etc.

2. If your exhaust is blowing then the RR reading will run lean anyway - even if the car is running fine.

3. The plug and play chip is not suited to your car.


Most cars are fine - but every engine is different. As Turbo J says - 'grahamL' on here can make you a GTEC chip that will iron out any flat spots that you have on the RR, but that then means another RR, and yet another chip if it's still off - a lot of time, money, and hasstle.

You can always put the standard chip back in.....

Thanks Suba, it's just the car I'm looking at is only running 1 bar with a GTEC 1 at the moment but I assume that's down to the EBV not doing a great job controlling the boost.

Does the boost do what is does in a 16vt, 1.2 bar, dropping off to about 12 psi by redline or is it stronger?

Sorry to thread-nap!

Buy an adjustable Fuel Pressure Regulator (FPR)
If the engine is running too lean you can add more fuel with the FPR. I use a Malpassi 1:1.2 (the 384 in the pic below).



Std is 1:1
384 is 1:1.2
384 HP is 1:1.4
x-axis is turbo pressure in bar
y-axis is fuel pressure in bar

Well you could but it's not the most elegant way of doing things as you are adding fuel across the full range so it's a somewhat blunt approach. You then have issues with the ecu adapting to the extra fuel i.e. leaning the mixture, so you are effectively drawn back to square one. If you want to increase injector size or fuel pressure then this should be done in conjunction with the correct ecu modifications.

The G-Tec is a good chip and works pretty darn well on most coupes. If you want a little bit more out of a standard car then a live map will make sure everything is doing what it should in terms of power and safety with increased driveability on and off boost.

Gtec only works on 20vt - not sure what you are asking?

Yes Flea a FPR may not be the best thing to do but it is easy to install it and if you don't have time/money for mapping, then I think it's okay modification.