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Old 06-25-2012, 01:49 PM   #1771
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I could use some adjustment tips for my F103. It's the newer lotus 99t version and the only things I have changed so far is to add ball bearings all throughout and I added heavier duty tie rods. I'm running outdoor on asphalt and when I go through wide corners at higher speeds I get chattering in the rear and when I have to go through the tighter corners I feel as if I need more steering because I really have to slow down alot. I 'm running the frp chassis and the short frp top plate. Factory foam tires. Factory plastic shock. I'm using a sidewinder esc and running in brushed mode. What do you reccomend for braking settings on the esc.
Maybe it due to the foam tires being too big. Once it wears down to around 58mm it should handle better.
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Old 06-25-2012, 11:39 PM   #1772
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I've recently bought a F103 and I want to buy a new body for it. My question is, where can I buy the right kind of body shell that fits the F103? And what kind of types will fit on my chassis?

Thanx!
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Old 06-26-2012, 11:38 AM   #1773
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i need a set of these f103 tires
rear's r1 hard compund Shimizu Racing PS-0542.

does anyone know who has them in stock?
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Old 06-26-2012, 02:48 PM   #1774
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Originally Posted by slowmotion36 View Post
I could use some adjustment tips for my F103. It's the newer lotus 99t version and the only things I have changed so far is to add ball bearings all throughout and I added heavier duty tie rods. I'm running outdoor on asphalt and when I go through wide corners at higher speeds I get chattering in the rear and when I have to go through the tighter corners I feel as if I need more steering because I really have to slow down alot. I 'm running the frp chassis and the short frp top plate. Factory foam tires. Factory plastic shock. I'm using a sidewinder esc and running in brushed mode. What do you reccomend for braking settings on the esc.
From what I have found in a year or so racing a 103 in Silvercan class the upgrades/adjustments kind of go like this:

99% of your speed will come from having the right tyres. Here in NZ we run Frewer Foams, but there are many suitable brands around the world, I would recommend getting something like the Exceed foams if you can as a starting point. (We run with no additives by the way)
Regardless, you want the softest rears you can get and the hardest fronts. I true mine down to around 58mm diameter.

A friend of mine here is a real Tamiya stalwart and he has been racing F1 for quite a while, refusing to use anything but Kit Foams. At big events he struggled to get into the A mains. He went to the Frewer foams, changed NOTHING else on the car and now is making every A main and challenging for the podium. Thas how important tyres are!

Get rid of the plastic shock, put in a touring car unit (TRF etc). I use 10wt Silicone damping oil and a yellow (soft spring here. Clean all the damping grease off the damper plates, and run them loose.
Use "O" rings on the T bar pivots, not the balls.
Front springs, you want the Tamiya black. You want a slight amount of Toe-out for nimble steering, not enough to make it wander all over the straights but just about.
Next step would be a 3 racing 103/109 front end, that way you can adjust camber and caster, I run between 1.5-2 degrees camber and anywhere from 4 to 6 degrees caster depending on where you want the steering.
I would then go to an upgraded Diff, with graphite axle.
Diff settings will have an effect on the steering of your car, I don't believe there is a hard and fast rule for this - the current National Champ here runs his diff so loose he can hardly get it off the line in a final, but it makes his car very stable in the turns.
I like mine tight as it makes the car more nervous and throttle sensitive in corners and this suits my style... Regardless what you MUST have is a silky smooth feeling diff when you rotate it on the bench, and it should take some effort to make the spur slip with your thumb. A quick test on the track is place your car down, and nail the throttle from a standstill. You should hear the diff slip no more than the first couple of feet max.
After that I would look at an aluminum motor mount for heat dissipation, and better weight distribution. On the weight subject, if you need to add any to get it up to minimum weight for your club then add it behind the axle low down on the pod. All your gear should be as far aft in the car as possible to aid rear traction.
Brakes should not really come into the equation for F1 as its all about maintaining speed, but occasionally you may need them for a late dive in a hairpin or to avoid a crashed car, go for the max you can run without it locking the car up and spinning it out, (I think mine are at about 60%)
Wings I use are 3 racing High downforce front and rear. If the track you run on is low grip you may not be able to run the high downforce front as it will make the car too loose in the rear though.
Gear it at around 3:1 for outdoors and enjoy!

PS - Sorry about pic quality, bad light and iphone
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Tamiya F103 Forum-103rm-1.jpg   Tamiya F103 Forum-103rm-2.jpg  
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Old 06-27-2012, 09:05 AM   #1775
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Thanks for the reply. A lot of good information there so that should give me a decent start. I just added the elevated shock mount which mounts to the top plate. It gave me more room to mount the electronics down the center of the chassis. Now I just need to keep practicing and develop my driving skills. Any idea where to get Frewer Foams in the US?
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Old 06-27-2012, 02:42 PM   #1776
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Any idea where to get Frewer Foams in the US?
No probs, sorry I should have mentioned the shock mount, yes it makes a difference room-wise.
I'm not sure if Frewer have any distributors in the U.S., he's based in NZ and been around a long tim but keeps a pretty low profile from what I can see.
This is his website, drop him an email and see how you get on.

http://www.frewerracing.com/

I think I pay around NZD $30 a set of four from my LHS so they're not really expensive.
I am yet to try the Exceed Foams on my 103, but have run them in Pro12 and Pro10 and find them very good so they may be worth a look for you.

Cheers!
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Old 06-27-2012, 08:11 PM   #1777
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I've recently bought a F103 and I want to buy a new body for it. My question is, where can I buy the right kind of body shell that fits the F103? And what kind of types will fit on my chassis?

Thanx!
TRG have bodies for F103. Parts TRG3003, TRG3004 and TRG3005
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Old 06-28-2012, 05:44 AM   #1778
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Any one know where I can get these two items? I look on all the site I know that sell parts for F1 and can't find these items, the bumper and wing are on a F103.
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Old 06-30-2012, 07:51 PM   #1779
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Do the parts for the F103GT also fit the F103? I'm trying to order some parts for my F103 and want to make sure I purchase the correct items? Also I'm looking to convert the diff to the F104 diff. Is there a difference in the shaft length between the F103 or F104 because I see they make different shafts for each?
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Old 07-01-2012, 06:54 AM   #1780
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Any one know where I can get these two items? I look on all the site I know that sell parts for F1 and can't find these items, the bumper and wing are on a F103.
Those are Tamiya Lotus 107B wings that came with the body kit, part number 50500. The 107B body was re-released a few years ago as the C-Type body, part number 84070

http://f1paintlab.com/zencart/index....&products_id=1
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Old 07-01-2012, 07:00 AM   #1781
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Do the parts for the F103GT also fit the F103? I'm trying to order some parts for my F103 and want to make sure I purchase the correct items? Also I'm looking to convert the diff to the F104 diff. Is there a difference in the shaft length between the F103 or F104 because I see they make different shafts for each?
There are a lot of parts shared between them but a lot of parts that are different, mainly front suspension parts. You can find an F103GT manual here to compare.
The F103 diff axle goes right into the right side hub to support it, the F104 Pro diff axle is shorter so you will need an F104 axle to go with the F104 diff.
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Old 07-01-2012, 03:33 PM   #1782
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Thanks for the info. The manual link helped and I ordered the 104 pro diff with the 104 carbon axle today.
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Old 07-11-2012, 12:07 PM   #1783
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I'm converting from the 103 diff to the 104 diff on my car. Do I still need to use the thrust bearing assembly inside the rear wheel or would I remove this and run without it with the new 104 set up. Also do I have to be careful about torquing down too hard on the carbon fiber shaft, and also what do most people use to lubricate the kingpins up front.
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Old 07-11-2012, 01:27 PM   #1784
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@Slowmo....Use the 1 piece trustbearing.
I gives you a very smooth diff.
Better then with the original ballbearing in there.

regards Roy
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Old 07-11-2012, 08:38 PM   #1785
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@Slowmo....Use the 1 piece trustbearing.
I gives you a very smooth diff.
Better then with the original ballbearing in there.
Maybe I'm confused, this is the F104Pro diff assembly. Where would the thrust bearing go?
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