GR Yaris Best Value mods for performance gains

[Woody]

Hi all

There are many options for increasing power for the GR now .

Please list your favourite upgrade that's made noticeable power increases. I'm looking for the best bhp for £.

Hopefully this will help me with future performance additions. ( Future budget around 2-3k , so no big engine builds)

Thanks all

 

[kinboshi]

Cup holder. That and the aluminium gear knob.

(I'm sure someone will give you some useful advice soon. My car's stock, and the only thing I've done to improve performance is do a driving limits course!)

 

[Greenthumb]

2-3k ?

HJS Downpipe + Remap.

 

[Heliomalt]

Good tires and driving skills.

 

[Michael Knight]

removed

 

[GRgrampa]

As already said, a remap has to be about the best power upgrade for the money.

 

[Michael Knight]

As already said, a remap has to be about the best power upgrade for the money.

depends if you track the car or not. if putting track miles I'd maybe start with better IC and CAI just to remove any heat issues as there is no point to add any more boost if your IAT is above 50 'C.

 

[Bronson]

If you just want to increase the power then depending on where you use the car and it’s jurisdiction, a decat and GPF delete (£600) should free up 20 HP.

A decat would require a remap, a GPF delete won’t. Remaps available from £4-600 (but for me the jury is still out on the long term effects of this) or you can use a tuning box with their associated risks.

Keeping things on the legal side an air intake duct may help a little bit, as with upgrading the turbo inlet - a good job to do at the same time (£300).

Intercooler (£700+), HJS downpipe if you don’t/can’t decat (£1500); both legal and not overly complicated.

The main caveat is that BHP increases are seemingly quite difficult to accurately gauge with this platform. Yes the car will feel like it’s pulling more, but what are you actually getting?

For me the car responds better to lightening and suspension tweaking. Also uprating the pads, lines and brake fluid (easily done for less than £500) and your confidence on the brakes will make up for any ‘shortfalls’ in power.

 

[Matt]

GPF delete, second hand DTUK box. 40 bhp and better response for about 450 quid.

 

[Woody]

Thanks for your response, I'm only using the car for b roads and no track days. If I remap with Litchfield Ecutek or colins software do I require kelford value springs ?

Is the hjs down pipe with gpf and Fujitsibo exhaust any good ( I realise I can remove the gpf but then I'm not insured if I crash )

Looks like the forge turbo inlet and air inlet are a option , with standard air box. I

Thanks

 

[Michael Knight]

Thanks for your response, I'm only using the car for b roads and no track days. If I remap with Litchfield Ecutek or colins software do I require kelford value springs ?

Is the hjs down pipe with gpf and Fujitsibo exhaust any good ( I realise I can remove the gpf but then I'm not insured if I crash )

Looks like the forge turbo inlet and air inlet are a option , with standard air box. I

Thanks

Yes for higher boost map valve springs is the way to go

 

[Philevo6]

Map, seat time, Good geo (if its out) and tyres.

 

[GR.KEV]

Hi all

There are many options for increasing power for the GR now .

Please list your favourite upgrade that's made noticeable power increases. I'm looking for the best bhp for £.

Hopefully this will help me with future performance additions. ( Future budget around 2-3k , so no big engine builds)

Thanks all

Collins re-map all the way, plus exhaust and intake

 

[Woody]

If I go for the HJS Downpipe, what make is best , I see milltek and hjs make them , as you can tell I'm a little confused .

 

[Eltel21]

If I go for the HJS Downpipe, what make is best , I see milltek and hjs make them , as you can tell I'm a little confused .

Afaik hjs make the cat and milltek just put their name on it. Probably easier to buy the milltek in the uk.

 

[Woody]

Afaik hjs make the cat and milltek just put their name on it. Probably easier to buy the milltek in the uk.

Thanks for letting me know

 

[Woody]

Thanks for letting me know

Anyone had the hjs downpipe changed in the UK ? I'm looking for an experienced company that's done it before ? Cheers

Plus approx price for fitting

 

[GRunt]

Afaik hjs make the cat and milltek just put their name on it. Probably easier to buy the milltek in the uk.

Yes, the milltek is just a HJS with rebrand.

Fitting isn't that easy because it's very tight around the downpipe. Some workshops remove the drive shaft, other don't. But it's sure a fiddle job. It takes about 2 hours on first try, but many workshops are getting faster on consecutive jobs. Than it's about 1 hour.

 

[Michael Knight]

what needs to be removed for valve spring swap? just thinking options here.

 

[yuri1312]

what needs to be removed for valve spring swap? just thinking options here.

if you don't want to drop the engine down from the bay (which will take more effort, but give you more room to work), essentially it needs to be stripped down as such:

springs can be changed without removing the head by pumping compressed air into the cylinder to keep the valves from dropping.

then "just" reinstall everything back - implies making sure timing is properly dialed in, etc etc. also some gaskets should be replaced to avoid leaks - at least high pressure pump, valve cover, and vacuum pump.

One important thing, if not dropping the engine, be very careful when refitting back components (especially in tight areas, such as when refitting the timing covers, as they're relatively brittle if not handled properly). take your time to put things back together correctly, and follow the fricken service manuals on how to do it properly. don't rush things or you'll be in a world of trouble.