256LikesTamiya TRF419
06-30-2018 | 05:06 AM
#3901
Tech Regular
Joined: Nov 2014
Posts: 314
Hi guys.
got myself a 419xr and have raced it a few times now.
first thoughts are that the car is very very stable. Infact for racing in 13.5 blinky it's too stable and not got enough turn in.
basically on standard setup, 2k diff oil, xray 2.5-2.8 on the front with xray 2.6 on the rear.
diffs in the low position.
5.5 front droop and 5 rear droop.
everything else is kit setup.
What would you do first to gain more initial steering?
medium sized indoor carpet track with medium grip levels.
got myself a 419xr and have raced it a few times now.
first thoughts are that the car is very very stable. Infact for racing in 13.5 blinky it's too stable and not got enough turn in.
basically on standard setup, 2k diff oil, xray 2.5-2.8 on the front with xray 2.6 on the rear.
diffs in the low position.
5.5 front droop and 5 rear droop.
everything else is kit setup.
What would you do first to gain more initial steering?
medium sized indoor carpet track with medium grip levels.
06-30-2018 | 06:14 AM
#3902
Hi guys.
got myself a 419xr and have raced it a few times now.
first thoughts are that the car is very very stable. Infact for racing in 13.5 blinky it's too stable and not got enough turn in.
basically on standard setup, 2k diff oil, xray 2.5-2.8 on the front with xray 2.6 on the rear.
diffs in the low position.
5.5 front droop and 5 rear droop.
everything else is kit setup.
What would you do first to gain more initial steering?
medium sized indoor carpet track with medium grip levels.
got myself a 419xr and have raced it a few times now.
first thoughts are that the car is very very stable. Infact for racing in 13.5 blinky it's too stable and not got enough turn in.
basically on standard setup, 2k diff oil, xray 2.5-2.8 on the front with xray 2.6 on the rear.
diffs in the low position.
5.5 front droop and 5 rear droop.
everything else is kit setup.
What would you do first to gain more initial steering?
medium sized indoor carpet track with medium grip levels.
06-30-2018 | 06:45 AM
#3906
Tech Adept
Joined: Nov 2017
Posts: 132
06-30-2018 | 06:59 AM
#3908
Tech Adept
Joined: Nov 2017
Posts: 132
Block? I am on XA/C right now. Actually I am in the process of tuning it. Getting better but not there yet.
My TA07 now is handling much better (also 2k rear diff) Much easier to drive. On power steering is amazing. On our medium large low grip asphalt track (80% technical 20% long straights) my TA07 understeers at some of the tight small corners.
Maybe due to my racing line. Need more practice on that.
My TRF419xr on power steering is not a good as my TA07 right now. Tight corners is the same. I guess blame it on the driver.
I can feel I need to fight my TRF419xr more all over compared to my TA07.
06-30-2018 | 07:57 AM
#3910
2K rear diff will cause your back to be planted but will also prevent it from rotating. I tend to run tracks with decent traction so I run between 3K to 7K diff oil.
Another trick to increase steering is to move your front suspension arms in towards the center of the chassis as far as possible. This will reduce the turn arc of your car overall. This results in roughly 3mm spacers in the front of the arms. To help improve weight distribution to the front, you can move the rear arms out all the way (roughly 3mm). I would change your rear toe to 2.5. It will reduce your stability and turn in but should help your exit speed. I would also consider changing your front suspension blocks from the standard G to potentially the F or E blocks. This will narrow your front and increase roll which may help with grip. You may also want to increase the strength of the springs and/or oil in your rear dampers. You may have too much weight moving to the rear. The oil will deal with sudden changes in weight distribution and the springs will deal with sustained changes in weight distribution. As an example I run SMJ silver springs and 500-550 oil in the back. In the front I run SMJ reds and 450 oil.
As with all suggestions, try each one one at a time to see if you like the change.
One thing I forgot, you can add some sweep to the front by decreasing your front rear suspension block by one. This will increase your exiting steering.
Another trick to increase steering is to move your front suspension arms in towards the center of the chassis as far as possible. This will reduce the turn arc of your car overall. This results in roughly 3mm spacers in the front of the arms. To help improve weight distribution to the front, you can move the rear arms out all the way (roughly 3mm). I would change your rear toe to 2.5. It will reduce your stability and turn in but should help your exit speed. I would also consider changing your front suspension blocks from the standard G to potentially the F or E blocks. This will narrow your front and increase roll which may help with grip. You may also want to increase the strength of the springs and/or oil in your rear dampers. You may have too much weight moving to the rear. The oil will deal with sudden changes in weight distribution and the springs will deal with sustained changes in weight distribution. As an example I run SMJ silver springs and 500-550 oil in the back. In the front I run SMJ reds and 450 oil.
As with all suggestions, try each one one at a time to see if you like the change.
One thing I forgot, you can add some sweep to the front by decreasing your front rear suspension block by one. This will increase your exiting steering.
06-30-2018 | 12:00 PM
#3911
Tech Adept
Joined: Mar 2017
Posts: 127
I race with 6k rear diff and it rotates without any problem. I have also added thicker front stabilizer and I can drive far more aggressive in the corner without hooking car.
Do you use servo saver or horn? Steering problems might be related to saver as well.
Have you tried to apply a bit more brake before turn to transfer load to front and increase grip? How does it behaves? Do you have heavy understeer or car is just lazy to turn?
Do you use servo saver or horn? Steering problems might be related to saver as well.
Have you tried to apply a bit more brake before turn to transfer load to front and increase grip? How does it behaves? Do you have heavy understeer or car is just lazy to turn?
06-30-2018 | 01:53 PM
#3912
2K rear diff will cause your back to be planted but will also prevent it from rotating. I tend to run tracks with decent traction so I run between 3K to 7K diff oil.
Another trick to increase steering is to move your front suspension arms in towards the center of the chassis as far as possible. This will reduce the turn arc of your car overall. This results in roughly 3mm spacers in the front of the arms. To help improve weight distribution to the front, you can move the rear arms out all the way (roughly 3mm). I would change your rear toe to 2.5. It will reduce your stability and turn in but should help your exit speed. I would also consider changing your front suspension blocks from the standard G to potentially the F or E blocks. This will narrow your front and increase roll which may help with grip. You may also want to increase the strength of the springs and/or oil in your rear dampers. You may have too much weight moving to the rear. The oil will deal with sudden changes in weight distribution and the springs will deal with sustained changes in weight distribution. As an example I run SMJ silver springs and 500-550 oil in the back. In the front I run SMJ reds and 450 oil.
As with all suggestions, try each one one at a time to see if you like the change.
One thing I forgot, you can add some sweep to the front by decreasing your front rear suspension block by one. This will increase your exiting steering.
Another trick to increase steering is to move your front suspension arms in towards the center of the chassis as far as possible. This will reduce the turn arc of your car overall. This results in roughly 3mm spacers in the front of the arms. To help improve weight distribution to the front, you can move the rear arms out all the way (roughly 3mm). I would change your rear toe to 2.5. It will reduce your stability and turn in but should help your exit speed. I would also consider changing your front suspension blocks from the standard G to potentially the F or E blocks. This will narrow your front and increase roll which may help with grip. You may also want to increase the strength of the springs and/or oil in your rear dampers. You may have too much weight moving to the rear. The oil will deal with sudden changes in weight distribution and the springs will deal with sustained changes in weight distribution. As an example I run SMJ silver springs and 500-550 oil in the back. In the front I run SMJ reds and 450 oil.
As with all suggestions, try each one one at a time to see if you like the change.
One thing I forgot, you can add some sweep to the front by decreasing your front rear suspension block by one. This will increase your exiting steering.
I wish I could articulate this well!
07-01-2018 | 06:24 AM
#3914
Tech Adept
Joined: Nov 2017
Posts: 132
Changes:
Rear diff was at 2k. Changed to 3.5k today.
Front/rear shocks was at 350. Changed rear to 400.
Front springs was SMJ yellow. Rear was SMJ red. Changes are to front only to SMJ red so both are on reds.
Front : 3.5mm spacers on bulkhead. Zero on c hub. Initially was 3mm/0.5mm.
Left untouched:
No changes to front & rear arms spacer. Both are on 3mms on the FF block & RR block.
Drop is 5mm front 4mm rear. Measured according to the 419x/xr setup sheet.
1 degree camber all around
1 degree toe out on the front. 2 degree in on the rear
Ride height : 5.2mm front 5.4 rear
Rear : 2mm spacers on bulkhead. 1mm on upright.
Now I am getting better steering but on power on corner exit, the rear side spins out.
Rear diff was at 2k. Changed to 3.5k today.
Front/rear shocks was at 350. Changed rear to 400.
Front springs was SMJ yellow. Rear was SMJ red. Changes are to front only to SMJ red so both are on reds.
Front : 3.5mm spacers on bulkhead. Zero on c hub. Initially was 3mm/0.5mm.
Left untouched:
No changes to front & rear arms spacer. Both are on 3mms on the FF block & RR block.
Drop is 5mm front 4mm rear. Measured according to the 419x/xr setup sheet.
1 degree camber all around
1 degree toe out on the front. 2 degree in on the rear
Ride height : 5.2mm front 5.4 rear
Rear : 2mm spacers on bulkhead. 1mm on upright.
Now I am getting better steering but on power on corner exit, the rear side spins out.