|
Forced Induction Turbo, Supercharger, Methanol, Nitrous |
|
Thread Tools | Search this Thread |
04-14-2019, 10:44 AM | #1 |
Member
Join Date: Jan 2019
Drives: 2017 860
Location: Redding, CA
Posts: 15
Thanks: 5
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Best header for JRSC?
Trying to source all my parts for the grand install and was wondering if people have any experience with different headers? Function > Form
__________________
- 2018 Toyota Prius I
- 2017 Subaru WRX Sti - 2017 GT86 860 - 1995 Honda Civic Si w/ B18C Turbo 300 whp |
04-14-2019, 10:54 AM | #2 |
Senior Member
Join Date: Mar 2017
Drives: 2017 Toyota 86
Location: Florida
Posts: 232
Thanks: 1,712
Thanked 117 Times in 73 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
It’s probably the Ace A350.
Sent from my iPhone using Tapatalk |
04-14-2019, 11:19 AM | #3 |
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)
|
Ace is the best.
Many people will say get a tomei or invidia or maybe even a jdl because of cost and bang for buck. But the ace is the all around best in performance. |
04-14-2019, 12:57 PM | #4 |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,933
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
Ace definitely seems like the make for highest HP. Best could mean a few different things for headers though. JDL makes great headers, I'd be sure to get some headers that come with ceramic coating to insulate heat in the headers for efficient evacuation. You also need to decide if you want UEL or EL. I'd stick with EL for pure function.
|
04-14-2019, 06:58 PM | #5 |
Senior Member
Join Date: Mar 2018
Drives: Bone stock
Location: Windsor, CT
Posts: 767
Thanks: 535
Thanked 232 Times in 162 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
JDL UEL performs like a EL header according to most people.
Sent from my SM-N960U using Tapatalk |
04-14-2019, 08:23 PM | #6 |
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)
|
My thoughts are that there are limits to NA power, which dictate the size of the exhaust. Typically, if you go too big then all you get is top end and too small and all you get is low end. A properly sized diameter and runner length 4-2-1 header seems to allow for the best NA gains, but does that mean it'll have the best gains for forced induction? Not necessarily, especially if there is significant increase in power.
Many people say for turbos that no exhaust, or the bigger the better, is the way to go because there is no sense in limiting the exhaust flow, as the turbo is flow dependent. A supercharger is not dependent on the exhaust to generate boost, so this idea of bigger is better just doesn't hold water with superchargers, as long as the exhaust is not the bottleneck to engine output. With a roots supercharger like my Harrop SC, the power delivery is linear, meaning it build boosts linearly with rpm. The JRSC, like other superchargers, build boost exponentially (X^2) with boost, which is why they have late power gains, but really big gains when that power finally comes on. So it begs the question, what would be the best header? Well, if the goal is to not limit the flow then the header should be large to support top end power, which is where the JRSC has most of its flow. If the goal is to try and flatten the torque curve a little then the header could be designed for low end power, but then it may be restrictive to those high rpm gains, which is kind of what the JRSC is all about.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
04-15-2019, 02:03 AM | #7 | |
Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,196
Thanks: 500
Thanked 1,067 Times in 775 Posts
Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
|
Quote:
also don't go UEL for forced induction, i have it and i'm down more than 20hp on higher rpm compared to a friend with identical setup as mine (hks v2) with a EL catless header |
|
The Following User Says Thank You to tomm.brz For This Useful Post: | DarkPira7e (04-15-2019) |
04-15-2019, 09:22 AM | #8 | |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,933
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
04-15-2019, 09:23 AM | #9 |
Senior Member
Join Date: Mar 2018
Drives: Bone stock
Location: Windsor, CT
Posts: 767
Thanks: 535
Thanked 232 Times in 162 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
Performance is not being sacrificed.
Sent from my SM-N960U using Tapatalk |
04-15-2019, 10:33 AM | #10 |
Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,196
Thanks: 500
Thanked 1,067 Times in 775 Posts
Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
|
Cosworth says that just a more free catback net more than 10whp on FI cars, do you think UEL can go the same as EL on higher rpm with a centrifugal supercharger?
i understand JDL makes UEL with quite big primaries but they sure can't go the same as EL, since uel are more inefficient per nature.. talking about pump gas of course, not E85 |
04-15-2019, 12:31 PM | #11 |
Member
Join Date: Dec 2017
Drives: jrsc_brz
Location: boston
Posts: 966
Thanks: 726
Thanked 675 Times in 336 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
How much power at 3k and at redline is a header realistically going to yield? Get the s/c on, that's the important thing. I would only go changing heads, over/front pipe for noise and flames. I'm on jrsc and catback. Stock head. Already pushing luck with neighbors lol. I have a fetish for subie rumble for uel all the way.
|
04-15-2019, 01:14 PM | #12 |
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,530
Thanks: 8,920
Thanked 14,176 Times in 6,835 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
|
Ace is king.
|
04-15-2019, 01:14 PM | #13 | |
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,530
Thanks: 8,920
Thanked 14,176 Times in 6,835 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
|
Quote:
|
|
04-15-2019, 01:48 PM | #14 |
Senior Member
Join Date: Dec 2017
Drives: 2017 BRZ (Sold), 2023 GR86
Location: Seattle, WA
Posts: 618
Thanks: 376
Thanked 433 Times in 216 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
I'll be running my A350 with the JRSC!
|
The Following User Says Thank You to mistople For This Useful Post: | HaXx (04-15-2019) |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
JRSC vs HKS v3 SC | Bekker | Forced Induction | 16 | 04-01-2020 05:25 PM |
JRSC C38 with an RS Pulley | majixmatrix | Forced Induction | 62 | 03-10-2020 08:42 AM |
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 |
FS (NY): JRSC C30 + Bilstein B16 + P&L EL Header/op/fp | dp1 | NY / NJ / CT / PA | 6 | 04-30-2016 07:27 PM |
JRSC oil use | xsnapshot | Forced Induction | 3 | 03-27-2016 10:22 PM |