Steeroids twitchy

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May 29, 2020 | 09:40 PM

drwet

Thread Starter

Melting Slicks

Joined: Dec 2009

Posts: 3,220

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From: Thunder Bay

Steeroids twitchy

I've been running a Steeroids setup for a few years and basically its great. I just find the setup is a little bit sensitive and the steering a little 'twitchy'. Not terrible, but I ran across a valve designed to limit the flow to the rack and reduce the sensitivity:

https://www.speedwaymotors.com/Musta...RoCamwQAvD_BwE

Anyone tried one of these?

Last edited by drwet; Jun 3, 2020 at 04:01 PM.

May 29, 2020 | 10:30 PM

MelWff

Race Director

Joined: May 2006

Posts: 18,648

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You sure it's not an alignment problem, toe in?

May 30, 2020 | 03:14 AM

JohnRR

Drifting

Joined: Jul 2008

Posts: 1,483

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From: Lititz PA

More positive Caster. And equal on both wheels.
A little negative Camber.
Toe In.

May 30, 2020 | 09:05 AM

leigh1322

Old Pro Solo Guy

Joined: Dec 2017

Posts: 8,001

Likes: 4,357

From: Marlton NJ

Especially caster. Even if you have to change the upper a arms or shafts. 4-5-6 degrees.
Makes the steering heavier too, or at least not so light.

May 30, 2020 | 09:42 AM

drwet

Thread Starter

Melting Slicks

Joined: Dec 2009

Posts: 3,220

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From: Thunder Bay

All excellent suggestions. I also changed the wheels on the car about the same time I installed the Steeroids setup. The new wheels have about 1/2" more negative offset which may have affected the handling as well. An alignment might be a good idea. Any suggestions for target specs?

May 30, 2020 | 11:55 AM

MelWff

Race Director

Joined: May 2006

Posts: 18,648

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Quote:

Originally Posted by drwet

Try the link below
https://tech.corvettecentral.com/201...ignment-specs/

May 30, 2020 | 09:40 PM

cagotzmann

Melting Slicks

Joined: Jun 2011

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Quote:

Originally Posted by drwet

I've been running a Steeroids setup for a few years and basically its great. I just find the setup is a little bit sensitive and the steering a little 'twitchy'. Not terrible, but I ran across a valve designed to limit the pressure to the rack and reduce the sensitivity:

https://www.speedwaymotors.com/Musta...RoCamwQAvD_BwE

Anyone tried one of these?

Here is what you need.

https://www.turnone-steering.com/pro...low-restrictor

I have a flaming River rack which is designed also for a lower flow rate than the factory GM PS Pump for the C3.

Here is a picture of the before and after. Left is the unit from Turn-One Right is the factory unit.

Also read this.

https://www.turnone-steering.com/blo...houldnt-be-cut

This covers using flow vs pressure to improve the sensitivity. The kit you refers to pressure reduction.

May 30, 2020 | 10:51 PM

nyciti

Burning Brakes

Joined: Aug 2016

Posts: 1,000

Likes: 283

From: New York

You can use washers to reduce the pressure its like 20 bucks from borgeson / summit. The problem is the GM pump is putting out about 1200 psi and the rack really wants to be about 8-900. If you arent running a hydro boost for the brakes you can shim it all the way and call it a day.

Link below

Amazon

Last edited by nyciti; May 30, 2020 at 10:57 PM.

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May 30, 2020 | 11:02 PM

Haggisbash

Melting Slicks

Joined: Oct 2012

Posts: 2,156

Likes: 273

From: Dunedin NZ.

JMPO I agree with Leigh 1322 you need more caster, have a look at C4's and later vettes they run well over 5 deg of caster. You can shim the pump as others have said and that helps but its the caster that makes the biggest difference. Slotting the mounting holes of the upper A arms will get you around 4.75 deg, more you will need adjustable A arms. I did both of these mods and it took away the twitchy go cart feel of the std steering.

Jun 3, 2020 | 11:13 AM

#10

drwet

Thread Starter

Melting Slicks

Joined: Dec 2009

Posts: 3,220

Likes: 651

From: Thunder Bay

Quote:

Originally Posted by cagotzmann

Thanks for the excellent reference, although the kit I was referring to appears to be exactly the same part that Turn One is offering, but at half the cost.

Jun 3, 2020 | 07:27 PM

#11

scottjamison

Burning Brakes

Joined: May 2017

Posts: 774

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From: Seattle WA

Quote:

Originally Posted by drwet

I did something like that. Mine was just adding shims to the existing valve which made it so you could tune it. It does help and puts more resistance into the steering so it feels more solid.
I have the Steeroids rack and pinion too. Mine doesn't feel twitchy, but it isn't as tight as my BMW is. I also have an Ididit column and tubular control arms. I do like how it drives, but I don't think it will ever handle like a Porsche.
Oh and I have had it completely aligned professionally which helped a ton.