|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
03-07-2019, 08:25 AM | #1 |
Member
Join Date: Dec 2018
Drives: 2013 GT 86
Location: BG
Posts: 51
Thanks: 323
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Built FI engine on 100 RON
To start this off I live in Europe and I don't have access to e85. With the GTX2867R I'm going to order I'll be looking to make around 380 horses. Some people tell me - stick with 12.5 compression ratio and run 100 RON, others - go for 10 or 10.5 comp and run whatever gas you want. I'll replace the con rods for sure, but my question is if I can run this much power on this gas with stock comp or should I lower the compression and go for more boost. Also I had read that e85 has a 100-110 octane rating and 100 RON obvioisly has 100 oct. so it shouldn't make that big of a difference. Maybe. If it does feel free to tell me!
Sent from my SM-A520F using Tapatalk |
03-07-2019, 09:24 AM | #2 | |
Senior Member
Join Date: Jan 2018
Drives: 2017 toyota 86
Location: PNW
Posts: 2,131
Thanks: 336
Thanked 1,188 Times in 781 Posts
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
|
Quote:
E85 is 108 octane but 95.75 is still pretty high octane. No issues with using that. Wont be able to run as much timing and boost though. Not sure you'll hit your power goal without something higher. |
|
03-07-2019, 09:27 AM | #3 | |
Member
Join Date: Dec 2018
Drives: 2013 GT 86
Location: BG
Posts: 51
Thanks: 323
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Thanks for the reply by the way! Sent from my SM-A520F using Tapatalk |
|
The Following User Says Thank You to Boris_Petrov For This Useful Post: | Joveen (03-07-2019) |
03-07-2019, 09:58 AM | #4 |
Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,207
Thanks: 502
Thanked 1,070 Times in 778 Posts
Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
|
i would keep stock CR and boost around 0.9-1 bar.. if you want more hp with 100ron maybe should think of bigger turbo
would be huge difference with e85 but i'm like you, only 100ron in italy |
03-07-2019, 10:02 AM | #5 | |
Member
Join Date: Dec 2018
Drives: 2013 GT 86
Location: BG
Posts: 51
Thanks: 323
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Sent from my SM-A520F using Tapatalk |
|
03-07-2019, 10:10 AM | #6 |
Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,207
Thanks: 502
Thanked 1,070 Times in 778 Posts
Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
|
if you remote tune with good master tuner and put a wideband I would not worry
if you lower CR you lose hp and then you put higher boost to compensate.. with that particularly turbo i would just keep stock CR, you said you build the motor anyway, with built engine i would personally go to 1Bar .. you re gonna be knock limited anyway by the fuel... don t know what hp you re gonna get, bigger turbo maybe would help and the high CR helps with the lag |
03-07-2019, 10:16 AM | #7 | |
Member
Join Date: Dec 2018
Drives: 2013 GT 86
Location: BG
Posts: 51
Thanks: 323
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Sent from my SM-A520F using Tapatalk |
|
03-07-2019, 10:16 AM | #8 | |
Senior Member
Join Date: Jan 2018
Drives: 2017 toyota 86
Location: PNW
Posts: 2,131
Thanks: 336
Thanked 1,188 Times in 781 Posts
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
|
Quote:
but, Lowering the CR will allow more boost and timing compared to higher CR resulting in more on Boost power. However off boost like in normal daily driving the lower CR will have a lot less power, less fuel efficiency, and feel "laggy". Also you need to look at your blower and at what flow rate or boost pressure it is the most efficient at. and pair your blower size and CR to your power level goals for maximum efficiency. Also some other options if E85 isn't available is octane boosters like Boostane (half a can should get you to 100 octane per tank of gas) or a water meth kit (a little pricey to setup at first but then pretty cheap after the initial investment). |
|
The Following 2 Users Say Thank You to 86TOYO2k17 For This Useful Post: | Boris_Petrov (03-07-2019), tomm.brz (03-07-2019) |
03-07-2019, 10:25 AM | #9 |
Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,207
Thanks: 502
Thanked 1,070 Times in 778 Posts
Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
|
whatever tuner with experience in this.. there are many also in Europe
you buy an ecutek programming kit, load tune you get from them and log your driving and they correct the tune basing on that |
The Following User Says Thank You to tomm.brz For This Useful Post: | Boris_Petrov (03-07-2019) |
03-10-2019, 04:55 AM | #10 | |
Member
Join Date: Dec 2018
Drives: 2013 GT 86
Location: BG
Posts: 51
Thanks: 323
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Sent from my SM-A520F using Tapatalk |
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Built engine - GEN-2 GTX3076r | Kris86 | Forced Induction | 242 | 05-05-2024 09:15 AM |
Built engine. How hard is it? | 86 South Africa | Engine, Exhaust, Transmission | 31 | 11-23-2017 06:25 PM |
Built engine cost? | wise345 | Engine, Exhaust, Transmission | 58 | 12-22-2016 03:16 PM |
Built engine question | 86 driver | Engine, Exhaust, Transmission | 13 | 09-10-2015 11:16 PM |
Anyone has Stroked and Built FA Engine yet ? | Whitigir | Engine, Exhaust, Transmission | 11 | 03-14-2014 05:31 PM |