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Old 05-08-2006, 08:00 AM   #7321
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Originally Posted by Merciless
Hi all,

Ran the car on the weekend , Tarmac with rubber tires, first time i've tried this. I had terrible mid corner push and need help !!

Set-up

Front

17lb spring ,30wt oil ,Tamiya 3hole pistons mounted 2 holes in at the top and all the way out at the bottom.

One-way used

Upper links mounted bottom row 3rd hole in

1.5deg negative camber

4deg caster blocks

Rear

19LB springs ,30wt oil ,Tamiya 3hole pistons mounted all the way out top and bottom

Diff ... set as loose as i could without any slippage on track

Upper links std. position on the hub 2nd hole in bottom row on the tower

2deg hubs used

1deg neg camber

Track was high grip i'm told and it was pretty hot for over here so i was using take off premounted cs 27's . to me they didn't seem to go off through the run so i assumed they weren't over heating

Like i said i have terrible mid corner steering it just seems to take an age to turn, although initial steering is pretty fierce. Sweeping bends are no problem at all, it's the slower 180's that cause the problem when i just have to wait while the car slows enough to go around

Any help please ??
Heavier springs on the back??? Go to 14.5# springs on the back. Even 12.5# is an option.
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Old 05-08-2006, 08:02 AM   #7322
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Yeah that's right heavier on the back and STILL not enough mid corner ......

Putting the rear springs lighter as you suggest would surely make my mid corner lack of steering worse !! ??

Thanks for the suggestion though, anyone else think it'd work ??
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Old 05-08-2006, 08:06 AM   #7323
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Quote:
Originally Posted by Merciless
Yeah that's right heavier on the back and STILL not enough mid corner ......

Putting the rear springs lighter as you suggest would surely make my mid corner lack of steering worse !! ??

Thanks for the suggestion though, anyone else think it'd work ??
Hi Merci,

Look at all the posted setups for carpet and asphalt. Not one has heavier springs on the rear.

Bill
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Old 05-08-2006, 08:19 AM   #7324
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Have you tried taking some of the bump steer out of the front end? Use the ball studs that are normally used on the rear shock tower for the camber links on the steering blocks. This will prevent the front end from generating a ton of toe out as the suspension is compressed. this should give you the mid corner bit you are looking for.

After you do that, go back to the same spring all around, and try the 2nd hole in all around on your camber links.... bottom row in the rear, upper in the front. Then try moving your rear camber link tot he outside hole on the rear hub. That should free up the rear end around the middle of the corner, and the car will feel more balanced overall. Running stiffer springs in the rear will really screw with stuff and make it hard to drive as is gets warmer in temps.

-Korey





Quote:
Originally Posted by Merciless
Hi all,

Ran the car on the weekend , Tarmac with rubber tires, first time i've tried this. I had terrible mid corner push and need help !!

Set-up

Front

17lb spring ,30wt oil ,Tamiya 3hole pistons mounted 2 holes in at the top and all the way out at the bottom.

One-way used

Upper links mounted bottom row 3rd hole in

1.5deg negative camber

4deg caster blocks

Rear

19LB springs ,30wt oil ,Tamiya 3hole pistons mounted all the way out top and bottom

Diff ... set as loose as i could without any slippage on track

Upper links std. position on the hub 2nd hole in bottom row on the tower

2deg hubs used

1deg neg camber

Track was high grip i'm told and it was pretty hot for over here so i was using take off premounted cs 27's . to me they didn't seem to go off through the run so i assumed they weren't over heating

Like i said i have terrible mid corner steering it just seems to take an age to turn, although initial steering is pretty fierce. Sweeping bends are no problem at all, it's the slower 180's that cause the problem when i just have to wait while the car slows enough to go around

Any help please ??
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Old 05-08-2006, 08:44 AM   #7325
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Hey Merciless, I was down at southend yesterday and was having the exact same problem as you. Try the ballstud thing on the hubs to get rid of the bump steer problem as Sushi said. I tried it yesterday and it really helped alot with mid corner.
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Old 05-08-2006, 10:52 AM   #7326
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Guys thanks for the replys,

BUMPSTEER already shimmed out as much as possible,

I was going to try using the upper position for the front links next, I thought making the rear links longer would have gave the rear MORE roll and thus more grip though ??

AGAIN thanks for the help and keep it coming.

I have also thought about rebuilding the rear diff in a hope to try and get it even looser as some of the local guys seemed to have a small amount slip in there set-up and i wonder if thats to increase steering responce......
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Old 05-08-2006, 02:29 PM   #7327
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Try going to 4 or 6 deg caster, or maybe less front droop.
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Old 05-08-2006, 03:19 PM   #7328
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Thanks Robfo,

At present i'm already at 4deg. front caster (sorry thought i'd posted that )

With 1mm of upward movement on the front from static and 3mm on the rear

Didn't think i could realisticly reduce the front droop much more

It's why i'm asking the question here, i thought i had done most of the obvious things to have lots of steering
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Old 05-08-2006, 03:24 PM   #7329
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Quote:
Originally Posted by Steve_L
Hey Merciless, I was down at southend yesterday and was having the exact same problem as you. Try the ballstud thing on the hubs to get rid of the bump steer problem as Sushi said. I tried it yesterday and it really helped alot with mid corner.
Steve,

I don't suspose you could post me a link or a base set-up you guys would start from normally for tarmac ?? just so i can see if i'm way off base with any settings ??
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Old 05-08-2006, 03:27 PM   #7330
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Rodders,
How tight was your rear diff. Did you adjust it or was it still the same as for carpet. Maybe try putting 1/2 turn tighter on the rear diff may work.
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Old 05-08-2006, 03:38 PM   #7331
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Quote:
Originally Posted by Merciless
Guys thanks for the replys,

BUMPSTEER already shimmed out as much as possible,

I was going to try using the upper position for the front links next, I thought making the rear links longer would have gave the rear MORE roll and thus more grip though ??

AGAIN thanks for the help and keep it coming.

I have also thought about rebuilding the rear diff in a hope to try and get it even looser as some of the local guys seemed to have a small amount slip in there set-up and i wonder if thats to increase steering responce......
It's a little bit different when you are moving the rear link further out ont he rear hub. Generally when you lengthen the camber link by moving the position on the shock tower further towards the centerline of the car, it will create more mechanical grip in the middle and exit of the turn.

When you move the camber link further out on the rear hub.... it creates less overall traction in the middle and exit of the turn. Move it to the inside, it will give you slightly less initial grip, but more in the middle and exit of the turn.

-Korey
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Old 05-08-2006, 04:29 PM   #7332
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Quote:
Originally Posted by Sean T Guy
Rodders,
How tight was your rear diff. Did you adjust it or was it still the same as for carpet. Maybe try putting 1/2 turn tighter on the rear diff may work.
Hey Sean, now your really messing with me ..... tighter that'll give me less steering !! Hey if the weathers nice this weekend i'm having ya
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Old 05-08-2006, 04:30 PM   #7333
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Sorry forgot to say Sean i had an awesome time, so thanks for all your help with gearing etc on the day.
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Old 05-08-2006, 08:26 PM   #7334
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Quote:
Originally Posted by JRX-S Bill
Hi Merci,

Look at all the posted setups for carpet and asphalt. Not one has heavier springs on the rear.

Bill
...how did that setup work at Ripon?
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Old 05-08-2006, 08:34 PM   #7335
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Quote:
Originally Posted by HarshGuy
...how did that setup work at Ripon?
Qualified 5th. Seemed good; but, the grip was ridiculously high for the race and EVERYONE was surprisingly fast. Got bumped to last on the second lap and got back to 5th by the end.

In those conditions, even a JRX-S was ahead of me for most of the race.
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