|
Forced Induction Turbo, Supercharger, Methanol, Nitrous |
View Poll Results: Turbocharger or Supercharger? | |||
Turbo | 19 | 30.65% | |
Super | 43 | 69.35% | |
Voters: 62. You may not vote on this poll |
|
Thread Tools | Search this Thread |
03-01-2021, 12:45 AM | #15 |
Senior Member
Join Date: Sep 2015
Drives: 2018 BRZ tS
Location: Washington
Posts: 212
Thanks: 314
Thanked 114 Times in 69 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
|
03-01-2021, 02:13 AM | #16 |
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)
|
Me too, and a spare socket and a long ratchet.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
The Following User Says Thank You to Irace86.2.0 For This Useful Post: | Side (03-01-2021) |
03-01-2021, 07:59 AM | #17 |
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)
|
I decided JRSC 4 years ago, no regrets. I prefer increasing torque curve of Rotrex compressor. I think the high low-end torque is only good for casual driving and drag racing. I prefer not wasting gas and stressing the engine for grocery shopping. Power is there when I need it with just a downshift. The continuously increasing torque gives a much steeper power increase with rpm. Whole rpm range is useful, especially before the redline. There is no power plateau before the redline. The car feels like it will accelerate more if it can go over the redline. I need to downshift and upshift at the right moment, otherwise the engine let's me know what a sucker I am. I like the rewarding and punishing character of the JRSC engine just like a sports car needs to be.
|
03-01-2021, 11:54 AM | #18 |
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)
|
Turbo, because it's flexible. You can build and tune your car to do nearly whatever you think is best.
__________________
Turbo FR-S Build - Build Thread
JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block |
03-01-2021, 12:59 PM | #19 | |
has a funny hat
Join Date: Feb 2020
Drives: 2014 BRZ Limited
Location: MI
Posts: 480
Thanks: 1,022
Thanked 613 Times in 271 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
Quote:
You could somewhat replicate a turbo's boost-by-X tuning by running a wastegate on the intake tube with an electronic control or an electronic control on the internal bypass (if the blower is equipped) and smallest pulley for the upper limit of desired boost. I haven't seen this in some years and I don't have the impression it was widely used, but back in the early/mid-oughtes when turbos were really starting to take over from superchargers in the 5.0 Mustang community, some SC users realized they could mimic the broad, linear powerband of a turbo by installing a small wastegate on the intake tube to dump excess psi. By targeting, say, 10 psi and running a 20 psi pulley, they could make 10 psi a couple thousand rpm lower in the torque curve and hold it through redline instead of making 10 psi near redline with a 10 psi pulley. |
|
03-01-2021, 06:37 PM | #20 | |
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:
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
03-01-2021, 07:38 PM | #21 |
Senior Member
Join Date: Feb 2017
Drives: '13 Whiteout
Location: San Clemente
Posts: 1,491
Thanks: 496
Thanked 1,242 Times in 673 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
I toyed with the idea of going FI. I ended up with a header and tune and it woke the car up and isn't putting a bunch of extra strain on the car overall. Going FI and flogging the car and you'll break things and it gets expensive. It's best to know what you're getting into. You'll find some guys that have had a decent experience and some with terrible experiences so it's a roll of the dice.
|
The Following User Says Thank You to TommyW For This Useful Post: | CSG Mike (03-01-2021) |
03-02-2021, 03:55 PM | #22 |
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)
|
That only happens after a downshift without pushing the throttle. It is a useful *feature*, done on purpose for engine brake or entering a curve with high rev while aiming to exit accelerating. If sc is over-spinning continuously at constant speed, there is something wrong with either the valve spring adjustment or the driver is not shifting right.
|
03-02-2021, 04:37 PM | #23 | |
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:
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
The Following User Says Thank You to Irace86.2.0 For This Useful Post: | CSG Mike (03-02-2021) |
03-02-2021, 05:25 PM | #24 | |
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:
It doesn't affect much under 5000 rpm but limits airflow capacity at high rpm to reach a flatter boost curve like a PD supercharger or a turbo it would require such a small pulley that you ll overspin and break the impeller Centrifugal sc anyway won't put out much boost at lower rpm even with a smaller pulley because it just won't spin enough EDIT: and then after writing I remember that you actually don't have a centrifugal supercharger but the Harrop, sorry |
|
03-02-2021, 06:03 PM | #25 | |
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)
|
Quote:
That overspin is not a disadvantage of supercharger. Actually it can be an advantage that eliminates the turbo lag. Plus, when the recirculation valve is open, supercharger's parasitic load on the engine becomes minimal since the superharger does not need to work against the back pressure of engine intake. |
|
03-02-2021, 06:47 PM | #26 |
Senior Member
Join Date: Aug 2019
Drives: 2016 Scion FR-S
Location: Dallas
Posts: 806
Thanks: 2,685
Thanked 393 Times in 266 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
|
The Following User Says Thank You to JesseG For This Useful Post: | x808drifter (03-03-2021) |
03-02-2021, 09:05 PM | #27 | |
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:
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
03-02-2021, 09:41 PM | #28 | |
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:
For a turbo, this is easy. The EBC bleeds pressure off of the wastegate line, so the wastegate stays closed, which raises the boost beyond the wastegate spring--super simple and easy to control. To raise the boost level on a supercharger, a smaller pulley has to be installed. Obviously this can't be done continuously, so the only way to control boost the same way as the turbo in order to do boost-by-gear, etc is to install a small pulley, and then the tuner would have to use an EBC on the bypass valve pressure line to open the valve partly when someone is on-throttle to bleed off excess boost, so the driver can limit boost. This would mean the supercharger is being asked to work harder, but not produce more, so it is inherently inefficient in a way that generates heat and raises the parasitic load on the engine. The result would be a greater chance of heat soak for a given power output and less fuel economy and less power for a given amount of work. This is analogous to someone digging a hole at a fixed speed and someone throwing some of the dirt back in the hole, so the rate of the depth of the hole can be controlled, where a turbocharger just asks the digger to slow down or to speed up, which is much more efficient and easy. The advantage the supercharger has over the turbo is that the turbo can't add any more boost down low if the turbo threshold hasn't been met, but the supercharger will add more boost down low with just a pulley change. A wastegate can add more boost to extend the power curve, but it can't make boost come on sooner like a supercharger can. In order to do that, a smaller turbo would be needed or other modifications would need to be done like restricting flow through the head, so pressures are higher/faster to spool the turbo faster or a ball bearing or twin scroll setup is utilized, but for the most part, people use turbo housing sizes to move the boost threshold up and down the rpm band, where a supercharger changes size in order to change the steepness of the power curve, which will result in progressively more boost at every rpm (typically), meaning more down low. While this is an advantage, a turbo will build boost so fast, that unless the turbo is large for the motor, the turbo will still out boost a supercharger.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
WTT: Pandem v3 widebody for FI kit (turbo or super) | IceMeister | Want-To-Buy Requests | 3 | 10-03-2018 12:06 PM |
Super vs turbo | aslanteye | Forced Induction | 29 | 06-16-2015 12:30 AM |
Turbo+super | firl21 | Forced Induction | 8 | 04-16-2013 11:51 AM |
would you turbo or super charge your BRZ/FRS? | chenshuo | Scion FR-S / Toyota 86 GT86 General Forum | 45 | 03-04-2013 10:13 AM |
Turbo or Super Charger | Ryan86 | AFRICA | 7 | 11-21-2012 08:14 AM |