Handling issue help sheet

[CoryDerr]

I remember seeing a document with symptoms the car is doing and then possible ways to fix it. I cant seem to find it now. Does anyone have a copy of something similar? I have massive under steer and want to see what all the options to fix it are.

Thank you

[DaveW]

Attached:

There are other items not noted here, but these are the most common ones you can do with the suspension system you have.

[Garey Guzman]

I remember seeing a document with symptoms the car is doing and then possible ways to fix it. I cant seem to find it now. Does anyone have a copy of something similar? I have massive under steer and want to see what all the options to fix it are.

Thank you

The last Carroll Smith publication was "Engineer in your Pocket" and was broken down as you describe. Pegasus shows them in stock:
https://www.pegasusautoracing.com/pr...8aAvjiEALw_wcB

[DaveW]

The Carroll Smith pamphlet is good general info, but some of it is more relevant to sedans, etc., than to formula cars. So, IMO, don't trust it blindly...

Of course, that applies to my car-prep PDF in the opposite direction...

[ExKartracer]

Thank you Dave!!

[CoryDerr]

Attached:

There are other items not noted here, but these are the most common ones you can do with the suspension system you have.

Dave, that's not the sheet i remember seeing but thank you, ill be reading this as well. just trying to keep up with the pack... haha

[CoryDerr]

The last Carroll Smith publication was "Engineer in your Pocket" and was broken down as you describe. Pegasus shows them in stock:
https://www.pegasusautoracing.com/pr...8aAvjiEALw_wcB

The sheet i saw was on here but long time ago. i printed it out but moved to a new garage and it got lost in translation

[Lyngengr]

I remember seeing a document with symptoms the car is doing and then possible ways to fix it. I cant seem to find it now. Does anyone have a copy of something similar? I have massive under steer and want to see what all the options to fix it are.

Cory, I saw a webinar that the fellow filled out a matrix of symptoms and corrections, I copied it into a document. I've also added some tips from Ross Bently. The PDF is attached.

Understeer is common with VD's at low speed. I have been fighting it constantly. Changing rake (lower front/higher rear ride height) helps, as does increasing rear shock bump. Perhaps the biggest fix is to use more trail braking to keep the front end loaded as long as possible. You could also try going to a soft front roll bar, this is particularly good to try since most VD's have adjustable front bars.

If you have high speed understeer, you either don't have enough front wing or too much rear wing. You definitely should have a nice, neutral balance in high speed corners, if not, look at aero first.

Setup Changes to Correct Handling Problems.pdf

[DaveW]

That is a very nice, concise, simple & straightforward PDF.

[CoryDerr]

Cory, I saw a webinar that the fellow filled out a matrix of symptoms and corrections, I copied it into a document. I've also added some tips from Ross Bently. The PDF is attached.

Understeer is common with VD's at low speed. I have been fighting it constantly. Changing rake (lower front/higher rear ride height) helps, as does increasing rear shock bump. Perhaps the biggest fix is to use more trail braking to keep the front end loaded as long as possible. You could also try going to a soft front roll bar, this is particularly good to try since most VD's have adjustable front bars.

If you have high speed understeer, you either don't have enough front wing or too much rear wing. You definitely should have a nice, neutral balance in high speed corners, if not, look at aero first.

Setup Changes to Correct Handling Problems.pdf

We run RFRs but I believe rake is my problem. Well get it sorted out. Thanks for the pdf.

[phantomjock]

Here is a sheet I got from a racer in the UK. He focuses a lot on data and we have been swaping ideas. He passed this along to me as a "Guide for Correcting Understeer/Oversteer." I don't know its exact origin, but like its breakdown of chassis relationships, corner position, and very visual/flowchart approach. I'll be honest - I just got it and haven't had a chance to try it - but it looks useful and is only 1 sheet!

Cheers - Jim

[Lyngengr]

Here is a sheet I got from a racer in the UK. He focuses a lot on data and we have been swaping ideas. He passed this along to me as a "Guide for Correcting Understeer/Oversteer." I don't know its exact origin, but like its breakdown of chassis relationships, corner position, and very visual/flowchart approach. I'll be honest - I just got it and haven't had a chance to try it - but it looks useful and is only 1 sheet!

Cheers - Jim

I saw this one as well, on Racers360 maybe? I was going to put it into Visio and then PDF it. I guess I will do that now, I certainly have time!

[alangbaker]

I saw this one as well, on Racers360 maybe? I was going to put it into Visio and then PDF it. I guess I will do that now, I certainly have time!

If you do rebuild it, I'd love to have a copy...

...but would you correct "appex" to "apex", please?

[phantomjock]

Or maybe an Excel Spreadsheet with Java?

Sorry that's not me. But would be nice.
Driver 360 via Your Data Driven?

Cheers - Jim