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Old 12-18-2019, 02:37 PM   #1
Hasbro
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Join Date: Aug 2019
Location: Danielsville, Ga
Posts: 78
Suspension advice please; 2,400 lbs., street legal

Seasons Greetings All,

I haven't started a build thread yet, want to get suspension figured out first. I'm building a street legal, gutted, 99 base. About 2,400 lbs., less after about 2 years. So, about 50 lbs. less than SpecB minimum.
75%? autocross/25%? street suspension. But driven mostly on the street on rural back roads that are in excellent shape. No traffic. No in town driving. Purely for pleasure driving. Corners, corners, corners. Don't care about top end or competing. No rules. Fast into corners.

$3,000.00+ suspension budget first year ($300.00 month). $3k - 5k second year and so on. The big crimp is doing it over time. $10k-ish total?

I'm assuming that EVERYTHING is worn out and it all needs refurbishing. It will need coilovers since it keeps rising the more the weight is removed. I'm only familiar with Koni Sport with custom adj. springs and Koni dbl. adj. race shocks (loved but out of my price range). This is my first Porsche. I'll do my own alignments. Fwiw, was comfortable with 2.35 - 2.5 hz. suspension and RA1s on last street project, could go a little bit higher with proper dampers.

Here's what I'm thinking for first year;
PSS9s - would prefer a step up but budget. Can get these for $2k. Has availability improved?
Front camber plate, rear upper shock mounts (front camber to eventually assist GT3 lower arms for more track?) $1,000.00
Maybe another $500.00 for stock tranny/motor mounts, other stock bushings due to cost. Upgrade later.

2nd Year;
Square setup with Toyo RA1 235/40/17 (24.4"x 9"- run wide), Jongbloed SpecBoxster 17x8.5, $349.00. Or maybe Yoko A052, etc. Will 9" tread be enough with 13/1 whp/lb. dry?
Drop about 100-115mm?, plus 3/10' drop from tire diameter. About -3 camber, -2.5, etc.
GT3 arms, etc., etc..

After first 2 year phase will drop weight more and will also be doing extensive body changes - purists run now!

Thanks for reading, your feedback is most appreciated.

Last edited by Hasbro; 12-18-2019 at 02:42 PM.
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