BRZ-123

Like others have said , you have 2 choices: 1. Ask you tuner to do 3 maps , 95 , 97 and 99 RON and use the right map based on fuel. A dyno run will show you the difference but I wouldn't expect a difference of more than 10 BHP from one tune to the other. 2. Carry an octane booster in the boot, Millers petrol power ecomax and use it to boost 97 to 99 Oct. When going forged, the fuel will be my last worry. At such high power levels , you need to think of more supporting mods like , gearbox, Differential, fuel pump, injectors, clutch etc as stock components cannot go that far or will get worn very quickly. Sent from my SM-G781B using Tapatalk

Strangely , I am in the same position. Feels very odd. Sent from my SM-G781B using Tapatalk

New BRZ vs 86 , differences Sent from my SM-G781B using Tapatalk

https://www.counterspacegarage.com/products/engine/ecu-programming-kits-ecu-tunes-maps/csg-spec-tuning-toyota-86-brz-frs CSG are quote popular in the USA for our cars and they recommend not to change fuel pump as aftermarket is not as reliable. Please see link above. Sent from my SM-G781B using Tapatalk

Simply put,XF is a road car oil, EE is a road car + track day oil , CFS is a pure Race oil. Technically XF is a grade 3 oil, EE is a blended grade 3 oil with some Esters ( aka Grade 5), CFS is a grade 5 , pure Ester oil. I hope this helps https://www.demon-tweeks.com/miller-oils-cfs-nt-plus-nanodrive-0w20-synthetic-motorsport-engine-oil-2016633/?sku=MOL7961-5L&istCompanyId=a2904180-3a7d-4e56-b876-cf81c9512180&istFeedId=0f6db192-3a9a-4369-b1f8-79615c622f96&istItemId=wptplqpxw&istBid=t&awaid=6538&utm_source=redbrain&utm_medium=shopping&utm_campaign=css&gclid=CjwKCAjwyIKJBhBPEiwAu7zll6fdGCcXX0Pal1riXl4FZ_j-TxF4UxHa5GORtGe_OCSjYXK5Vs2_oRoCIcIQAvD_BwE Sent from my SM-G781B using Tapatalk

Some specifics around gearbox from my link above , Source: Toyota US pressroom. For Manual Transmission (MT), the shape of the shift lever is optimized for smooth, enjoyable shifting, whether you’re moving from 2nd to 3rd or downshifting from 5th to 4th. Additionally, a carbon synchronizer was added to improve shifting into 4th gear. The MT uses new low-viscosity oil and bearings for smooth shifting operability with the higher torque output of the 2.4L boxer engine. For the Automatic Transmission (AT), when in Sport mode, the AT senses brake and accelerator operation and vehicle behavior to automatically shift into the optimal gear, bringing drivers the control they want. Additional clutch discs and a new high-capacity torque converter allow for smooth delivery of the engine’s added power.

Some text from Toyota which gives details of the changes made. So far the clearest.. https://pressroom.toyota.com/all-new-2022-toyota-gr-86-thrills-around-every-corner/ Sent from my SM-G781B using Tapatalk

Indeed. More steel in GR and more Aluminium in BRZ. It would be a matter of time before someone stateside does a BRZ vs GR86 comparison.. Its coming home.. ( I meant the new car GR) [emoji2] Sent from my SM-G781B using Tapatalk

Sorry, don't like Sarah. Personal preference. Better reviews here. Today was the day of media review release stateside for GR86 Check our cars results against Golf R And this Today was spent enjoying the future car.. I will purchase its Swansong edition.. for now will hold onto mine. Sent from my SM-G781B using Tapatalk

I'd read somewhere they have changed the synchros and fourth gear as carbon one as that failed on some cars. Use the translate capability and try this link. I've now read 100s of articles so don't remember which one had it https://motor-fan.jp/mf/article/1636/ Sent from my SM-G781B using Tapatalk

Cobra have a ready made one. So ask him to get you a discount and be done with it, unless you want him to up the 200 cell to a 300 cell. Just make sure it mates to your Milltek but it should, i suppose. https://cobrasport.com/products/toyota-gt86-sports-de-cat-front-pipe-performance-exhaust?currency=GBP&variant=32119934419025&utm_medium=cpc&utm_source=google&utm_campaign=Google Shopping&gclid=CjwKCAjwjdOIBhA_EiwAHz8xmzm0TZrJEmOBoRjNH9TdP1ydZM0_szM4fntHru52eeRs1fz4OudwrBoCAHoQAvD_BwE This Toyota GT86 performance exhaust is made in 2.5"/63.5mm bore pipework and fits from the over pipe to the centre section. The sports cat exhaust option will still enable you to pass a UK MOT emissions test or police road side checks. The de-cat sports exhaust option is sold for motorsport and off road use only and will NOT be able to pass a UK MOT emissions test or police road side checks.

Yes it would. Higher CEL the better (200 minimum). A cheap try could be a good 30 min blast before MOT to get your cat glowing and then straight in for testing. Alternatively people find friendly naughty MOT testers to help. Sent from my SM-G781B using Tapatalk

With you getting the MPG you are getting NA, I cant see that happening [emoji12][emoji12] Get it done now you are so clear in your head and tell us how you get on with your MPG [emoji2] Sent from my SM-G781B using Tapatalk

And listen to this Sent from my SM-G781B using Tapatalk

It is definitely then the manifold cat has got weak. When cars are new , both cats are in optimal condition, when you take one of them off, for the initial few years , one cat can pass the MOT, when hot. As time goes the cat wears down and there needs to be a second cat to support it which there isn't. Sensor thing is highly unlikely. You could try replacing the 2 O2 sensors in the manifold but I don't think it will help. Sent from my SM-G781B using Tapatalk