|
Forced Induction Turbo, Supercharger, Methanol, Nitrous |
![]() |
|
Thread Tools | Search this Thread |
![]() |
#1 |
Member
Join Date: Sep 2018
Drives: 2003 330i, 2019 BRZ (blue, with PP)
Location: Philadelphia
Posts: 40
Thanks: 0
Thanked 8 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
JRSC and octane at the track
(this is crossposted to the track/HPDE forum, so sorry about the redundancy)
I have a 2019 BRZ which has been the track a few times (JR oil cooler, camber bolts, brakes and tires...otherwise stock). While I love the way the car handles, I wish it had a few more horsepower; I think around 250 would probably be the sweet spot for me. I don't need to be the fastest, but there are a lot of fast cars in my group, and it would be good to keep up with the pack. I do mostly HPDE's and a few days of open track. No racing, but I usually drive in the advanced groups. I am thinking of getting a Jackson Racing supercharger. The instructions "REQUIRE a minimum of 50% 100 octane fuel" at the track. 75 to 100% 100 octane is recommended. Some of the tracks I would be going to may not have 100 octane. Also, while I recognize that going to the track is not cheap, when I can get it, it is over three times the price of 93 octane. Can a JRSC run 93 a the track? I don't need crazy horsepower, and I would be happy to sacrifice some power for a 93 octane track tune, if one exists. Reliability is more important to me than power. What is everybody doing? Thanks. Glenn |
![]() |
![]() |
![]() |
#2 |
Member
Join Date: Aug 2012
Drives: 2013 FRS
Location: California, USA
Posts: 81
Thanks: 24
Thanked 34 Times in 25 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
I am sure it’s a safety margin thing. Chances are it’s going to run just fine with 92. But JRSC wants to be on the safe side where car is WOT all the time and just maybe in certain situation that might be harmful for the engine. I do mix if not full 100 oct (too lazy to mix) as insurance against possible major engine damages. There were times I forgot and started day with 92s, that’s prob okey as I warm up to the track. After first session I’d fill up with 100oct to get roughly 50/50, and full 100oct from there on. It drinks gas faster than my 8cyl NA car lol!
__________________
2013 FRS - JRSC CARB
"Use all of the track" they say |
![]() |
![]() |
![]() |
#3 |
Senior Member
Join Date: Jun 2017
Drives: BRZ Yellow, 2019 Ranger, 2011 Evora
Location: Dallas
Posts: 1,685
Thanks: 352
Thanked 1,475 Times in 771 Posts
Mentioned: 14 Post(s)
Tagged: 1 Thread(s)
|
Do you have E85 available? That would be the safest track fuel. Other option would be a custom tune not the canned JRC. Hit up CSG they will keep you safe.
|
![]() |
![]() |
The Following User Says Thank You to Grady For This Useful Post: | x808drifter (02-14-2021) |
![]() |
#4 |
Senior Member
Join Date: May 2012
Drives: 2013 Series 10 6MT FR-S
Location: Moreno Valley, CA
Posts: 5,529
Thanks: 1,999
Thanked 2,013 Times in 1,457 Posts
Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
|
E85 is the way to go at the track for sure. And way cheaper. You can even bring it with you. Car can easily fit 4-6 jerry cans in it.
__________________
2013 Series 10 FRS #553
RCE T2's, SPC LCAs -4/2.6 camber JDL 4-2-1 EL, FP and OP, Tuned by Zach@CSG on e85 RR Wilwood Front/Rear Sport BBK, Motul 600 Fluid ARC-8 17x9 SX2 GTs 245s/Koing 17x8 v730's 225's |
![]() |
![]() |
The Following User Says Thank You to jflogerzi For This Useful Post: | Irace86.2.0 (03-03-2021) |
![]() |
#5 |
pessimistic skeptic
Join Date: Apr 2016
Drives: '14 FR-S Monogram AT JRSC
Location: Upstate NY
Posts: 1,767
Thanks: 1,695
Thanked 1,035 Times in 684 Posts
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
|
|
![]() |
![]() |
![]() |
#7 | |
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,531
Thanks: 8,920
Thanked 14,177 Times in 6,835 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
|
Quote:
Race fuel, Race pads, Race maintence, makes sense, for a car being driven at a Race track. |
|
![]() |
![]() |
The Following User Says Thank You to CSG Mike For This Useful Post: | mrg666 (02-16-2021) |
![]() |
#8 |
Member
Join Date: Sep 2018
Drives: 2003 330i, 2019 BRZ (blue, with PP)
Location: Philadelphia
Posts: 40
Thanks: 0
Thanked 8 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
So just to be sure....
There is no safe way to tune a BRZ for the track with a JRSC on 93 without risking serious engine failure. I'm okay with being slow... just looking for ways to buy some HP without undue risk. Thanks for your contributions, everybody. |
![]() |
![]() |
![]() |
#9 | |
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,531
Thanks: 8,920
Thanked 14,177 Times in 6,835 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
|
Quote:
The question here is, what risk is acceptable to you? Track driving will heat soak your intercooler far more than street driving, which means higher intake temps, which means higher risk of knock/predet. Higher octane fuel means higher knock resistance. It has nothing to do with the tune, and everything to do with the driving conditions. |
|
![]() |
![]() |
The Following 2 Users Say Thank You to CSG Mike For This Useful Post: | Irace86.2.0 (03-03-2021), mrg666 (02-16-2021) |
![]() |
#10 |
Member
Join Date: Sep 2018
Drives: 2003 330i, 2019 BRZ (blue, with PP)
Location: Philadelphia
Posts: 40
Thanks: 0
Thanked 8 Times in 6 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Thanks for your feedback, everybody. As far as E85 goes, some tracks may have some without traveling too far. Or I could take a bunch to the track. Wouldn't be convenient, but doable. Two questions:
1. Would E85 provide the octane/ antiknock protection to make a JRSC (relatively) safe at the track? 2. Given that I would be lugging a bunch of E85 to the track, could I dilute it with pump gas to E60 or something like that? I would have to measure ethanol content and/or install a flex fuel kit. Thanks in advance. |
![]() |
![]() |
![]() |
#11 | |
Senior Member
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,884
Thanks: 5,668
Thanked 5,805 Times in 3,299 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Yes, E85 will greatly reduce the risk, even if you used it to add power, but with it the car would be heavily detuned if power was tuned to be the same. Yes, do flex fuel and yes you could do a mix. The effective knock resistance drops as the ethanol % drops. The tuner and be conservative across the board if you wanted.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
![]() |
![]() |
![]() |
#12 |
Senior Member
Join Date: May 2012
Drives: 2013 Series 10 6MT FR-S
Location: Moreno Valley, CA
Posts: 5,529
Thanks: 1,999
Thanked 2,013 Times in 1,457 Posts
Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
|
Why not stay NA and get Flex Fuel and try e85 at the track with a proper tune. See if thats enough power. Staying NA depending on number of Laps you could only need 3-4 5 gallon buckets vs boosted you will need alot more.
__________________
2013 Series 10 FRS #553
RCE T2's, SPC LCAs -4/2.6 camber JDL 4-2-1 EL, FP and OP, Tuned by Zach@CSG on e85 RR Wilwood Front/Rear Sport BBK, Motul 600 Fluid ARC-8 17x9 SX2 GTs 245s/Koing 17x8 v730's 225's |
![]() |
![]() |
![]() |
#13 |
Senior Member
Join Date: Jul 2013
Drives: 2013 FR-S Argento
Location: Westport,CT
Posts: 1,855
Thanks: 517
Thanked 1,039 Times in 616 Posts
Mentioned: 7 Post(s)
Tagged: 1 Thread(s)
|
E85 can be a pain in the ass if it's not readily available. Too much work IMHO unless you have it everywhere (we don't in CT). And it will help with detonation but not with engine temps. Put your money toward a custom tune with a good tuner and they should be able to tailor it to whatever you need on safety margin with 93, especially if you're not looking for outright power. You can even switch between tunes and can have a lower power 'safety tune' and a higher power 'street tune'. Then take the rest of the money and put it into heat management - you already have a good start with that oil cooler. Vented hood, upgraded radiator, etc. It also depends on experience and how hard you're going at the track - someone like CSG Mike will really push things harder than your typical track afficionado, and your track afficionado will push the car harder than folks who go to the track a couple times a year.
|
![]() |
![]() |
The Following User Says Thank You to bfrank1972 For This Useful Post: | CSG Mike (03-15-2021) |
![]() |
#14 | |
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,531
Thanks: 8,920
Thanked 14,177 Times in 6,835 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
|
Quote:
|
|
![]() |
![]() |
|
|
![]() |
Tags |
hpde, jrsc, octane, supercharger 86 frs brz, track car |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
mixing e85 (109 octane) with e15 (91 octane) | pcguru2000 | Engine, Exhaust, Transmission | 19 | 03-08-2022 10:35 PM |
JRSC vs HKS v3 SC | Bekker | Forced Induction | 16 | 04-01-2020 05:25 PM |
Edelbrock vs JRSC for track | Hades | Forced Induction | 21 | 02-21-2018 02:30 PM |
Speed Academy EP5 - JRSC dyno (updated: EP6 - JRSC Track Test) | DarkSunrise | Scion FR-S / Toyota 86 GT86 General Forum | 17 | 03-30-2017 11:39 PM |
100 octane race gas: 91 octane ratio? | GhostofAkina | Scion FR-S / Toyota 86 GT86 General Forum | 15 | 02-08-2013 01:23 AM |