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-   -   Speed Passion F1 car - The SP1 (https://www.rctech.net/forum/electric-road/712987-speed-passion-f1-car-sp1.html)

Solara 11-15-2013 07:56 AM


Originally Posted by nrtv20 (Post 12727114)
anyone else notice that the rear end movement is limited when you start to adjust the side spring screws? or am i supposed to leave the screw fully engaged and turn the spring nut?

I don't turn that spring plastic nut...I turn the screw in and out.

When you say it is limited...limited how? I mean, the rear pod cannot turn 180....can you describe HOW that is limited..? In what direction or in what form...?

nrtv20 11-15-2013 08:16 AM

pod movement is limited because the damper mount on the rear pod hits the screw on the side springs, pod pivots a lot more one direction now then the other. I'll try to take some pictures when I'm on lunch break for you. I've never had a pivot link rear end I could be doing it wrong.

Solara 11-15-2013 09:12 AM


Originally Posted by nrtv20 (Post 12727463)
pod movement is limited because the damper mount on the rear pod hits the screw on the side springs, pod pivots a lot more one direction now then the other. I'll try to take some pictures when I'm on lunch break for you. I've never had a pivot link rear end I could be doing it wrong.

OK..I think I understand what you mean. 2 ways you can fix this...

(1)...that button head screw, you need to dial it in further...that means you have to dial that spring holder further in, and dial down the button head screw and make it lower. When the screw are lowered, you have more room between the side damper mount and the screw

(2)...instead of using the button head, like me...I use a long set screws. Set screws dialed all the way in and flush with the battery holder..that give you even more room between the side damper mount and the battery holder.

I did that back then when I was working on the prototype....you can try it, but it is not necessary....

http://i146.photobucket.com/albums/r...ps58a5f302.jpg

Then later on....I received this parts. Problem solved completely...Battery holder plate (carbon) SP000679

http://www.speedpassion.net/us/produ...SP000679&c=CAR

InspGadgt 11-15-2013 09:16 AM


Originally Posted by Sonter (Post 12726766)
Hello guys, I need some help with gearing. At my club we race 21.5 stock and they use 2.2 fdr.... The problem is that I cannot fit a bigger pinion than 25t with the 72t spur. Is there a solution for this? I know I can change the spur with a smaller one but at the moment I don't have it and I can't find to buy locally. I need this for Sunday so I better find a solution how to make it faster with a 2.7fdr. I am using the speed passion 21.5R. Do you think I can fit an MMM sensor board ( red) so I can set timing more? This way will I have a hot motor result?

Please help.

If you switch to 64 pitch you can get lower final drive ratios. Before the IIC I was running 2.5 fdr on our track and switched to 2.8 fdr for the IIC and stayed with that locally when I got back.

metalnut 11-15-2013 09:25 AM


Originally Posted by nrtv20 (Post 12727114)
anyone else notice that the rear end movement is limited when you start to adjust the side spring screws? or am i supposed to leave the screw fully engaged and turn the spring nut?

How and why are you adjusting the screws? The way it's suppose to be done is that you screw the screw all the way in, and then you turn the spring retainer out until it touches the surface it will be resting on (with stock setup, the top of the side links). To achieve that, I used aluminum spacers to give me the exact same setting on both sides (I believe 4 or 5mm). If you run the side links on an angle, you will need a longer screw and more spacers to sit the spring down on the chassis directly.

If you want more tension from the springs you need to get stiffer springs. Compressing them by turning out the screw retainer does not change their rate.

metalnut 11-15-2013 09:27 AM

Oh, I think I misunderstood the question, but looks like Solara may have answered it. Sorry!

Jorge T 11-15-2013 10:32 AM


Originally Posted by nrtv20 (Post 12727463)
pod movement is limited because the damper mount on the rear pod hits the screw on the side springs, pod pivots a lot more one direction now then the other. I'll try to take some pictures when I'm on lunch break for you. I've never had a pivot link rear end I could be doing it wrong.

Solara's answer is one solution (cutting the parts) what I did is I replaced the SP ball end with an associated short neck ball end and got some extra travel.

metalnut 11-15-2013 10:54 AM


Originally Posted by Jorge T (Post 12727801)
Solara's answer is one solution (cutting the parts) what I did is I replaced the SP ball end with an associated short neck ball end and got some extra travel.

Does the car ever actually flex that much under normal racing conditions? I'm having a hard time visualizing the pod rotating far enough to make this an actual issue.

nrtv20 11-15-2013 11:04 AM

Thanks for the help guys, that answered my questions.

Jorge T 11-15-2013 11:27 AM


Originally Posted by metalnut (Post 12727848)
Does the car ever actually flex that much under normal racing conditions? I'm having a hard time visualizing the pod rotating far enough to make this an actual issue.

I race on carpet and my car would turn better to the right than to the left until I screwed the spring holder all the way in (like you posted) and added the asc ball stud.

Sonter 11-15-2013 11:56 AM


Originally Posted by Solara (Post 12727419)
I really HOPE you are talking about 2.7 final but not 2.2 final....2.2 final, you will buy alot of new 21.5 because you will fry them on each run.

To get to 2.76 final, you will need a 26T pinion, which is not possible....however, what I did is dremel the motor screw slot further so you can slide down the motor more toward the front...you might be able to squeeze in the 26.....I am running 24 and I have never use the full power.

And yes...you can use the MMM RED sensor board and you should swing it all the way to the right for max timing on that board. I am actually using the yellow board for more timing....

Another trick is...raise the rear axle a step higher, that rasied the SPUR gear taller and give you more room to fit a bigger pinion, whoever, you have to check and see your rear ride height is tall enough or not...

Well everyone runs with 2.2 fdr at my club... We have a very long straight. We race outdoors on asphalt and circuit is also used for 1/10 gp cars.

Do you think that if I put in the red sensor and put timing to max, it won't fry the motor with 3 fdr?

metalnut 11-15-2013 12:48 PM


Originally Posted by Jorge T (Post 12727916)
I race on carpet and my car would turn better to the right than to the left until I screwed the spring holder all the way in (like you posted) and added the asc ball stud.

Interesting... do you have a part number for that AE ball end?

Solara 11-15-2013 01:05 PM


Originally Posted by Sonter (Post 12727988)
Well everyone runs with 2.2 fdr at my club... We have a very long straight. We race outdoors on asphalt and circuit is also used for 1/10 gp cars.

Do you think that if I put in the red sensor and put timing to max, it won't fry the motor with 3 fdr?

No, it won't....we ran more timing on 21.5 for around 3.8 final on GT.

Sonter 11-15-2013 10:48 PM

Ok thanks for your help.... I will post results after race. Hope everything goes well and finish my races without any problems.

metalnut 11-17-2013 02:00 PM

1 Attachment(s)
Alright, so I posted another shot in the F1 thread, but I wanted to leave my mark here as well. Here is my SP-1 in its fully, spray-can-painted glory :D


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