Steering Ackerman? (more Throw!) - Help Please

[VinceVegaUK]

Hi all,

I just got a new servo and saver for my TA05 (not the IFS) and i have found my ackerman/throw doesn't go all the way. Even though its only by a few degrees it makes a massive difference around the tight 90 degree corners at my local club. I have tested the difference by pushing my trim over when i turn to see how much of a difference it makes, and with out the extra bit the trim gives it does cause me to go a lot slower in the turns the front is pushing wide and can't get the back end around as easily. I am using a basic hand set my friend have others that allow them to have more % steer to give them a fuller throw but surly you should be able to set this up with the chassis.

The push rods and ball joint aren't touching anything as i do get full throw if i trim it all the way over either way.

Hope someone can help

thanks

VV

[pagedm_f350]

I am no track setup expert and since no one has replied yet I will offer my thoughts

I was going to suggest the EPA (end point adjustment) settings on your radio but as you say you only have a basic Tx with manual trims so thats not an option...

I think the fact that you got a new servo saver is most likely the cause of the drama, is the new one the correct Tamiya replacement part or a different brand/type? Check the distance between the pivot ball hole and the servo screw, if it is anything less than the stock tamiya one it will affect (reduce) your steering throw, also check the angle of your servo saver, maybe you get full throw in one direction and not the other?:

Another thing to check would be the outer steering rod location, see the setup sheet below, it's from an IFS but the steering is the same:

Check the position of the rod, set at Position #1 will give you more throw/steering angle than it will at Position #2, you may already have it like that but it thought I would mention it.

Hope this helps

[VinceVegaUK]

thanks for the help.

I moved the tie roid point on the knuckle before my last race and it did make a small difference. I lengthend the tie rod from the saver to the steering post but its just not long enough, i hoping a friend can help with a longer one. the saver is not tamiya its kimbrough, i was reccomended as it stays centre the tamiya high tourque ones wear and become loose at the centre point :-s. It does have a lower centre hole and then two others on either side, i will check the ball joint hole point and angle and see what i can get there. If not i might put the Tamiya saver back on, i glued it with rubber glue to fill the gap it wore, it should save on an impact but at least it stays striaght.

thanks

V

[94eg!]

thanks for the help.

I moved the tie roid point on the knuckle before my last race and it did make a small difference. I lengthend the tie rod from the saver to the steering post but its just not long enough, i hoping a friend can help with a longer one. the saver is not tamiya its kimbrough, i was reccomended as it stays centre the tamiya high tourque ones wear and become loose at the centre point :-s. It does have a lower centre hole and then two others on either side, i will check the ball joint hole point and angle and see what i can get there. If not i might put the Tamiya saver back on, i glued it with rubber glue to fill the gap it wore, it should save on an impact but at least it stays striaght.

thanks

V

The aftermarket servo saver is your problem. If it's shorter, it will have less throw in either direction. Get yourself a new Tamiya one...

One tip for the tie rod that connects the servo saver to the steering system, it should be setup so the servo saver horn is perpendicular to the tie rod. You don't want the servo saver pointing straight up & down. This means your shorter tie-rod might still work...

BTW: There is an aluminum horn for the Tamiya hi-torque servo saver (54121). It doesn't eliminate wear, but it does help reduce it. You will still have to periodically replace the plastic piece that sits on the servo splines...

[VinceVegaUK]

The aftermarket servo saver is your problem. If it's shorter, it will have less throw in either direction. Get yourself a new Tamiya one...

One tip for the tie rod that connects the servo saver to the steering system, it should be setup so the servo saver horn is perpendicular to the tie rod. You don't want the servo saver pointing straight up & down. This means your shorter tie-rod might still work...

BTW: There is an aluminum horn for the Tamiya hi-torque servo saver (54121). It doesn't eliminate wear, but it does help reduce it. You will still have to periodically replace the plastic piece that sits on the servo splines...

As shown in Pagedm's pic above? about a 10 degree (probably about 1 saver tooth) towards the right wheel when the servo is on and centered? If so i will check the centre skrew to ball joint distance between each servo to see if there is any difference. I was thinking as a slight different way to achieve the Perpendicular set up i could set the saver straight (up & down) but use the higher next hole along to set it as you suggested as the kimbrough save has about 5 holes, one lower centre and two either side and are higher.

Im undrstaning it more now so i will have a play and see what i can get out of it.

Many thanks

VV

[94eg!]

As shown in Pagedm's pic above? about a 10 degree (probably about 1 saver tooth) towards the right wheel when the servo is on and centered? If so i will check the centre skrew to ball joint distance between each servo to see if there is any difference. I was thinking as a slight different way to achieve the Perpendicular set up i could set the saver straight (up & down) but use the higher next hole along to set it as you suggested as the kimbrough save has about 5 holes, one lower centre and two either side and are higher.

Im undrstaning it more now so i will have a play and see what i can get out of it.

Many thanks

VV

Yes that is the first thing I would try. Any hole further out from the center will definitely increase your steering angle...

[VinceVegaUK]

Thanks all for the help i have learnerd a lot in the process too. It looks like i have sorted it, I will be testing it tonight but as far as i can see setting the trim all the way over on full lock either way cant push it any further than it already is normally now

The kimbrough savers center hole was about 3mm lower the tamiya one, i set the saver dead straight and vertical with centre trim but then used the top off-center hole nearest the right wheel to give the said 10 degree in the manual with a 21mm tie rod setting and all is good.

Thanks

VV

[VinceVegaUK]

Update:

Works a treat, nearly won the A final got beat by an uber cool Xray Carbon Pan Car that was totally hooked up with a consistent driver, got lapped once but kept with him after that till the end, quality fun!

[pagedm_f350]

Update:

Works a treat, nearly won the A final got beat by an uber cool Xray Carbon Pan Car that was totally hooked up with a consistent driver, got lapped once but kept with him after that till the end, quality fun!

Awesome Vince glad we could help out