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Got a sti prodrive style and thinking of putting a bigger scoop on the hood for track days just wounding if there is any real benefit on doing it like. I know fmic would be the best option but want to stick with our mishmoto 08-14 tmic
My personal opinion is that it's more important to have a good seal around the intercooler and undertray than a bigger scoop.
Also, I am not personally convinced that fmics are "better" for an average power Subaru on track. Certainly mine drives much nicer with an sti tmic than a fmic on track.
My personal opinion is that it's more important to have a good seal around the intercooler and undertray than a bigger scoop.
Also, I am not personally convinced that fmics are "better" for an average power Subaru on track. Certainly mine drives much nicer with an sti tmic than a fmic on track.
Yeah that was the only downside to the bigger tmic like they don't to a undertray to fit we done our own not the best looking but seals great like
Have you monitored temps before and after installing the Mishimoto tmic? A friend of mine had one and data showed it to be less efficient than his original Sti one; it was tracked. I'd be interested in your feedback.
As said, I've data logged temps and the secret is a good seal from scoop to TMIC. I reverted back to standard scoop once I'd got my seal to be efficient. Smaller scoop is less drag too (and you don't look like a maxpower **** either). The engine rocks quite a lot so this has to be factored in with your seal design.
Have you monitored temps before and after installing the Mishimoto tmic? A friend of mine had one and data showed it to be less efficient than his original Sti one; it was tracked. I'd be interested in your feedback.
Simon ( JGM ) told me more or less the same Apr 2014
So I threw my large TMIC from CXRACING one out You can still google it Item Code: IC0004-B-Y-P-PIPE
Have you monitored temps before and after installing the Mishimoto tmic? A friend of mine had one and data showed it to be less efficient than his original Sti one; it was tracked. I'd be interested in your feedback.
Not monitored it yet tbh like not done many miles since this lock down
As said, I've data logged temps and the secret is a good seal from scoop to TMIC. I reverted back to standard scoop once I'd got my seal to be efficient. Smaller scoop is less drag too (and you don't look like a maxpower **** either). The engine rocks quite a lot so this has to be factored in with your seal design.
Going to get the group n engine mounts to help with the engine rock like and yeah had one on before look way to big for the car like plus flex like hell after a 100. I was looking at the rpg carbon one this time and was only going to run it on track days like
Going to get the group n engine mounts to help with the engine rock like and yeah had one on before look way to big for the car like plus flex like hell after a 100. I was looking at the rpg carbon one this time and was only going to run it on track days like
Its the top engine mounting strut that really flexes and they get softer over time, so yes do replace it.
The Group N ones are fine if you only track but if you run a daily Id steer clear of them as you are likely to notice more more vibration into the car , I ran a new standard one.
The Scoop wont make you go appreciably faster or slower on the track and you will back off anyway when you look down at the fuel gauge dropping in sympathy to your Jaw.
Far more important to speed the money on a set of old rims and track tires as you don't want to mess up the nice OZ's
Its the top engine mounting strut that really flexes and they get softer over time, so yes do replace it.
The Group N ones are fine if you only track but if you run a daily Id steer clear of them as you are likely to notice more more vibration into the car , I ran a new standard one.
The Scoop wont make you go appreciably faster or slower on the track and you will back off anyway when you look down at the fuel gauge dropping in sympathy to your Jaw.
Far more important to speed the money on a set of old rims and track tires as you don't want to mess up the nice OZ's
Don't mind the more noise or vibration tbh like be going full pollybush etc after Christmas like and true don't want to mess the oz up haha we get our tires for next to nothing as father in law owns and tyre garage haha
I had been reading this post and but then answered a 2013 thread by mistake
However my post might encourage the thread opener to stay with his current scoop , which like mike74 I also see as more aesthetic on a Prodrive Bug,
and like Floyd reasons (larger = >drag ) for a track car a good aerodynamic solution.
So here it is copied over.
It was my understanding that Sti needed the bigger scoop especially at lower speeds on the higher powered production road car ( Post Japanese Producers 280bhp agreement )
to prevent charge temperature increase causing knock. The introduction of the IHI 34 Turbo >2001 having exasperated the situation together with US Emission Laws.
So why do we not use the Large scoop on Rally Cars? . The WRC cars had to produce still greater power, and especially in higher temperature regions you needed a bigger / better cooled IC . This could only be solved with FMIC and additional bonnet vents to remove the IC/ Radiator hot air before it flowed over the engine. Engine and Turbo cooling was actually assisted by the Bug / Newage Scoop. The larger the scoop however the worse the drag is and is detrimental for smooth airflow over the car. For this reason the Sti large scoop was not ( as far as my research goes ) used in the WRC. Rally avg speeds are typical 110 kmph . some are even higher. Unless the drivers were roasting in the cockpit while the drag was worth a Tenth of a second / km even the small roof vents had to be dropped down.
On track cars the drag is even higher still and due to the higher average and higher maximum speeds the larger the scoop the higher the positive lift pressure becomes due to turbulence generated over the screen / roof. But a FMIC may not be needed for sub 400 bhp as sufficient Airflow is available from a WRX / Newage scoop,
For example when driving on the Ring , in light traffic a good Road Subaru / Pilot will average 130kmph , (about 8 1/5 mins bridge to gantry ) with many tuned Subarus exceeding straight line 225 kmh so on the Track large scoop size becomes a Drag liabilty. Take a look at www.wrcwings.tech , this link helped me against my fading memory.
However if you want to drive around Town at legal max and protect your circa 400 , 400 + bhp build then a FMIC is the only way. Just hook up a temperature sensor on your TMIC and you soon see that charge temp increases quickly <30 mph ,
if you want some help use the IC water cooling.
Isn't I better to fit a splitter inside the existing scoop to more evenly distribute the airflow rather than going bigger? in terms of volume and airflow most will hit the back of the scoop and pass through the rear of the intercooler - wouldn't it be an idea to put a splitter / diffuser inside the scoop to deflect some more airflow towards the front of the intercooler kind of like a scoop within a scoop if that makes sense???
I had been reading this post and but then answered a 2013 thread by mistake
However my post might encourage the thread opener to stay with his current scoop , which like mike74 I also see as more aesthetic on a Prodrive Bug,
and like Floyd reasons (larger = >drag ) for a track car a good aerodynamic solution.
So here it is copied over.
It was my understanding that Sti needed the bigger scoop especially at lower speeds on the higher powered production road car ( Post Japanese Producers 280bhp agreement )
to prevent charge temperature increase causing knock. The introduction of the IHI 34 Turbo >2001 having exasperated the situation together with US Emission Laws.
So why do we not use the Large scoop on Rally Cars? . The WRC cars had to produce still greater power, and especially in higher temperature regions you needed a bigger / better cooled IC . This could only be solved with FMIC and additional bonnet vents to remove the IC/ Radiator hot air before it flowed over the engine. Engine and Turbo cooling was actually assisted by the Bug / Newage Scoop. The larger the scoop however the worse the drag is and is detrimental for smooth airflow over the car. For this reason the Sti large scoop was not ( as far as my research goes ) used in the WRC. Rally avg speeds are typical 110 kmph . some are even higher. Unless the drivers were roasting in the cockpit while the drag was worth a Tenth of a second / km even the small roof vents had to be dropped down.
On track cars the drag is even higher still and due to the higher average and higher maximum speeds the larger the scoop the higher the positive lift pressure becomes due to turbulence generated over the screen / roof. But a FMIC may not be needed for sub 400 bhp as sufficient Airflow is available from a WRX / Newage scoop,
For example when driving on the Ring , in light traffic a good Road Subaru / Pilot will average 130kmph , (about 8 1/5 mins bridge to gantry ) with many tuned Subarus exceeding straight line 225 kmh so on the Track large scoop size becomes a Drag liabilty. Take a look at www.wrcwings.tech , this link helped me against my fading memory.
However if you want to drive around Town at legal max and protect your circa 400 , 400 + bhp build then a FMIC is the only way. Just hook up a temperature sensor on your TMIC and you soon see that charge temp increases quickly <30 mph ,
if you want some help use the IC water cooling.
Looks like I'll just keep the Oem one on for track days haha
Isn't I better to fit a splitter inside the existing scoop to more evenly distribute the airflow rather than going bigger? in terms of volume and airflow most will hit the back of the scoop and pass through the rear of the intercooler - wouldn't it be an idea to put a splitter / diffuser inside the scoop to deflect some more airflow towards the front of the intercooler kind of like a scoop within a scoop if that makes sense???
The Zero Sports undertray already has bits to direct airflow we just cut the metal off the bottom and replaced with rubber to go with the bigger tmic not the best looking but dose have a good seal like
28 October 2020, 09:21 PM
Any benefit going for a bigger scoop
