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Old 08-05-2013, 08:06 PM   #586
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Originally Posted by aloksatoor View Post
In a real f1 car it pushes the rear end down without causing drag issues like a bigger rear wing. Should do the same here as well. Since the air under car has a small entry point, flat front bottom, and the rear is raised causing a bigger exit point, the air is less dense where the diffuser is causing low pressure and pushing the car down.
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Old 08-06-2013, 03:53 PM   #587
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anybody know if this will fit the tfr 101

http://www.reflexracing.net/TRG-F103...ok_p_1135.html
You might have problems fitting it as it's made for the F103/F104 pod which is narrower than the TRF101 pod and the side tunnel might end up where you need to fix it to the left side mount and the spur gear protector might not line up with the gear. It could be made to fit, but you might end up cutting an extra hole or two in it for clearance.

You might be better trying an ABC Hobby or Zen Racing diffuser, they don't have the side tunnels.

BTW RCMart have the TRG diffuser in stock.

Last edited by terry.sc; 08-06-2013 at 04:04 PM.
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Old 08-06-2013, 04:03 PM   #588
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What does it do other than looking cool? I'm curious cause it's nice and something i might want to add to my V2
It increases downforce and stabilises the rear end of the car. In this article from RC World magazine, they tested several diffusers on an F103, and compared it to the standard setup. Usually they gave around 15% rear downforce for about 4% more drag, and on the track there is a noticeable difference. They work even better if you don't cut out the hole under the motor, but obviously that reduces the amount of motor cooling.

The secondary reason for using one is that it protects the rear of the car and particularly the spur gear from damage. With the diffuser if someone hits the rear of your car they can end up damaging the diffuser but they won't get into the spur gear teeth.
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Old 08-07-2013, 04:36 AM   #589
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The wait for my TRF101 to pass through customs is killing me

I just want to be building it already!
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Old 08-07-2013, 08:47 AM   #590
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God I hope so!

I may have to order one - be the guinea pig
Here are side by side pictures of my F1R with the TRG diffuser and my TRF101. The mounting points on the diffuser are pre-marked with dimples - but you can create new ones to fit the pod. (along with the cutout area for the motor)
The spur gear should clear w/o issues.





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Old 08-07-2013, 09:30 AM   #591
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I'm surprised this would work as well as it does because the cutout for the motor should destroy any effect the diffuser creates.
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Old 08-07-2013, 10:37 AM   #592
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It works really well, when I ran it on F103 foam I was able to run much harder rear tires, 35 shore vs 40 and still have the same rear grip with very little tire wear. On the F103 15th stock tires it almost made the car push it you can imagine that on a F103 Foam
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Old 08-07-2013, 01:34 PM   #593
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A thin sheet of plastic stcikers or saran wrap on t the cutout should work better then
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Old 08-07-2013, 02:34 PM   #594
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Maybe Im the only one... But I'm getting a bit confused by the TRF instruction manual. Does anyone know a good step by step online?
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Old 08-07-2013, 02:46 PM   #595
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Maybe Im the only one... But I'm getting a bit confused by the TRF instruction manual. Does anyone know a good step by step online?
Are you just stuck on one step ? ...I think petit rc has a build that a member on this forum had done .
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Old 08-07-2013, 02:59 PM   #596
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I'm surprised this would work as well as it does because the cutout for the motor should destroy any effect the diffuser creates.
You don't have to cut out the hole in the diffuser.

There are two ways of looking at it. Leaving the diffuser solid means you have a smoother airflow to the diffuser and faster moving air under the pod to reduce pressure and generate downforce. Cutting the hole out means you have the airflow wrapping around the bottom of the motor, pulling air up through the hole which reduces the air entering the diffuser, so reducing pressure again to generate downforce. The air coming up through the hole ends up going over the top surface of the diffuser, also helping downforce.

Personally I always cut out the hole, it helps airflow around the motor and running indoors on tight tracks means motor cooling is very much a priority.
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Old 08-07-2013, 05:07 PM   #597
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How much does the diffuser raise the motor pod?
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Old 08-08-2013, 03:24 AM   #598
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Originally Posted by theatriks View Post
Are you just stuck on one step ? ...I think petit rc has a build that a member on this forum had done .
Its the servo installation - I will be having a look at it with fresh eyes later
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Old 08-08-2013, 01:30 PM   #599
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How much does the diffuser raise the motor pod?
.030 inch, ~.8mm
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Old 08-08-2013, 02:40 PM   #600
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Hi guys - Time for some daft questions before I start my build.

With chassis prep - CA... Is that just normal superglue?
What about clear nail varnish, would that do the job?
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