Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

Post Reply
 
LinkBack Thread Tools Display Modes
Old 09-12-2006, 04:18 PM   #1
Registered User
 
Join Date: Apr 2006
Location: Fl
Posts: 91
h&r shocks and gemballa springs??

hey guys, after my last autocroos(4th one) i am considering doing some suspension work to eliminate some body roll. I have found a set of brand new gemballa lowering springs for about $150. I have also found a USED set of H&R coil over shocks for about $400. After watching videos of my runs i see that my car hardly squots at all but dives like crazy when hard on the brakes. So what are your guys two cents? I have some concerns with buying used shocks, but the price is so good its worth it to me to look into it. The seller says there is about 2400 miles on the shocks. Thanks
__________________
Kyle Tarr

2000 Porsche Boxster
-Straight-piped from cats back
-MOMO race seats
-Schnell short shifter
-RJS Harness
-High flow intake
-Eibach lowering springs
-Bilstein sport shocks
kyle986driver is offline   Reply With Quote
Old 09-13-2006, 06:17 AM   #2
Registered User
 
Join Date: Apr 2006
Location: Chicago
Posts: 585
Stiffening, my friend, is not always the answer (sometimes it is, but not always)... There is a finely tuned balance between the components of the chassis that shifts the weight to the right places at the right time. My friend is finding out the hard way with his 240SX that he spent a lot of money on a turbo and complete coilovers and the bottom line is he doesn't the rubber to make it work. He is running Goodyear F1's but they just don't have the traction needed to really take advantage of what he did with his car. I personally believe he needs some wide competition tires, possibly slicks, to make this thing kick some arse!

I am also looking to improve the handling performance of my car for autocrosses, but I am going to begin with wheels/race tires and strut braces and then go from there.

I'm sure a few people will hop on and tell you to get more experience first seeing that you've only done 4 autocrosses.
Sammy is offline   Reply With Quote
Old 09-13-2006, 11:53 AM   #3
Registered User
 
Perfectlap's Avatar
 
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
do not under any circumstances buy used shocks. I've had brand new ones fail on me after only a few months. Getting the Porsche back on the lift to replace a blown shock will cost you a needless expense.

I also don't recommend trying to figure out your own suspension. Call a Porsche tuner in your area (Maybe ask Brumos Porsche for a recomendation) and ask what they have that maybe you can check out and drive or if they've done recent work on a Boxster. But do this only after you've gotten in about 12 events.
After your first full season you should add up your experience and consider new tires and such. The tires are the key, put your dollars there and you could shave as much as two seconds a lap, which in Autocross is enourmous. Maybe a set of harness belts too. Being glued to the seat takes weight off the steering wheel which aids concentration.

The factory set up from Porsche on sticky tires is more than enough to get you fastest lap of the day without any mistakes on your part. When you reach the absolute limit (consistently within half a second of the quickest time in your class)
then consider modifying beyond tires.

P.S.
check out the EVOLUTION driving school. They are based out of central Florida.
Well worth the $350 or whatever they are charging.
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
Perfectlap is offline   Reply With Quote
Old 09-13-2006, 12:00 PM   #4
Registered User
 
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
Quote:
Originally Posted by Perfectlap
do not under any circumstances buy used shocks. I've had brand new ones fail on me after only a few months. Getting the Porsche back on the lift to replace a blown shock will cost you a needless expense.

I also don't recommend trying to figure out your own suspension. Call a Porsche tuner in your area (Maybe ask Brumos Porsche for a recomendation) and ask what they have that maybe you can check out and drive or if they've done recent work on a Boxster. But do this only after you've gotten in about 12 events.
After your first full season you should add up your experience and consider new tires and such. The tires are the key, put your dollars there and you could shave as much as two seconds a lap, which in Autocross is enourmous. Maybe a set of harness belts too. Being glued to the seat takes weight off the steering wheel which aids concentration.

The factory set up from Porsche on sticky tires is more than enough to get you fastest lap of the day without any mistakes on your part. When you reach the absolute limit (consistently within half a second of the quickest time in your class)
then consider modifying beyond tires.

P.S.
check out the EVOLUTION driving school. They are based out of central Florida.
Well worth the $350 or whatever they are charging.
Hi,

^ What he says...

Happy Motoring!... Jim'99
MNBoxster is offline   Reply With Quote
Old 09-13-2006, 01:19 PM   #5
Registered User
 
Join Date: Apr 2006
Location: Fl
Posts: 91
ok thanks guys, what your saying is true. I am going to do the evo school as soon as i can. I have already thought about stickier tires, but have decide to wait a few more months of racing before i go that route. What you guys didnt say anything about is the lowering springs, i am considering these not only for the lower center of gravity and such, but because my car needs to be lowered on a looks stand point. It has 18 inch wheels and sits kinda high for my likeing. thanks for the help..
__________________
Kyle Tarr

2000 Porsche Boxster
-Straight-piped from cats back
-MOMO race seats
-Schnell short shifter
-RJS Harness
-High flow intake
-Eibach lowering springs
-Bilstein sport shocks
kyle986driver is offline   Reply With Quote
Old 09-13-2006, 01:47 PM   #6
Registered User
 
Join Date: Apr 2006
Location: Chicago
Posts: 585
Quote:
Originally Posted by kyle986driver
ok thanks guys, what your saying is true. I am going to do the evo school as soon as i can. I have already thought about stickier tires, but have decide to wait a few more months of racing before i go that route. What you guys didnt say anything about is the lowering springs, i am considering these not only for the lower center of gravity and such, but because my car needs to be lowered on a looks stand point. It has 18 inch wheels and sits kinda high for my likeing. thanks for the help..
If you are just going for looks than do a search and I'm sure you'll find plenty of people that have asked the same question.

Using lowering springs for performance will "help" with the center of gravity and squatting issue but please keep in mind that lowering springs will almost always increase the stiffness (never heard of it not increasing stiffness but always is a strong word). This stiffness will affect the way your car handles and not necessarily in a good way. Chassis compliance is important in all types of racing and if stiff was always the way to go they would all take the shocks and springs out and run chassis similar to shifter karts. Even drag racing requires the car to squat to get the weight over the rear tires for better launchin.

I'm pretty sure that you'll find that in order to kick butt at autocrosses you'll need some race tires. I don't think I could do anything to my car that would allow me to keep up with high powered cars (like Vettes) that are running competition tires. I think stiffening without better rubber would simply make me more prone to spin.
Sammy is offline   Reply With Quote
Post Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 01:40 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page