socalman

What size is the bumpstop and what is the travel with the bumpstop on?

socalman

That's the spirit! pick me a couple three while your at it

MTPZ06

Well then...any supporting vendors out there that can give us actual specs of how these compare to stock shock dimensions?? Pfadt advertises shorter body for increased travel. Put up or shut up!

Ltrain925

so i have been pondering about my sway bars on my 01Z, sounds like c6Z sways are what is best option correct? any from rubber bushings to poly bushings.

socalman

Pfadt returned by inquiry and it is confirmed, they are 1" shorter (15.5" mount length vs. 16.5" stock). Travel is 3.5", so .25" more travel, giving a 1.25" advantage. 1" bumpstop that could be shortened.

1" shorter on a 2" drop will allow 3/4" travel before hitting bump, or 1.25" if bumpstop was shortened.

I'd say this shock would do well at a 1.5" drop, but no more. It is adjustable which could in essense, utilize the travel better. Some vendors had them for $650 last fall, I'm inquiring on current deals.

Even the C6Z51 bars are bigger than your C5Z. If your rear tires are stock 10.5" rims with 11" tires, I'd use the C6Z51, as the C6Z06 bars are recommended for a 12"+ rear tire. You may get some sliding and wheel hop on turns if the bars are too big for a less-than width tire.

I put the poly bushings, they hold the sway tighter and won't let it move like rubber will (although the amount of movement is minute).

lionelhutz

The front C6Z bar is only 1mm thicker. I don't think you'll find there is enough of an improvement to justify the change.

The rear C6Z51 bar is almost 2mm thicker so they could make the car slightly little more prone to over steer but I doubt you'll notice that change either.

Probably just putting poly bushings on the bars you have would make them as good as the C6Z51 bars with rubber bushings.

Peter

mountainbiker2

Pfadt sport shocks are not shorter. They are actually longer by a 1/4" then C6 Z06 shocks. The important measurement is when the shock is compressed all the way down. That's the number your looking for. The Pfadt shocks have a shorter shock body, but the other end is much longer. That's where the adjuster is mounted on the front shocks. Taking up travel. I can't remember if the shock body on the rear is shorter or longer, but I know that it's 1/4" longer also when fully compressed. I don't count the bump stop at all in compressed measurements. I've had 04,06,07 Z06 shocks, Penske dbl and triple adj. shocks and now Pfadt shocks.

Steve

socalman

If the overall uncompressed length of the shock (mounting points) is 1" shorter with the same travel, then a lowered car (by 1") would have the same travel as a stock height car with a 1" longer shock. I don't get your reasoning. Do you know the length of a C6Z shock?

C5 stock, Bilstein sport and Pfadt all have 3.5" travel (give or take .25) but Pfadt is telling me their shock has a uncompressed length of 15.5", vs. 16.5 for the others.

mountainbiker2

I believe the shocks I still have in the garage are 07 Z06 shocks. The travel in the front is 5 1/4". The rear are 4 3/4". No bump stops. Any car lowered more then the stock hardware will be sitting on the bump stops more then likely on any shock brand. At least very close. The only exception would be the Penske's.

Steve A.

socalman

If you get a chance, could you measure the C6Z shocks (rear- as that's all I've done so far)- uncompressed from center of bottom mount bolt holes to center of the 2 upper mount bushings? I'd be very curious.

You say there's no bump stop, did you take the dust cover off? If there's 4-3/4 travel with the cover on, maybe there is a bump stop under the dust cover and there's even more travel than known?

Do you know any dimensions on the Penske?

MTPZ06

I just want some damn shocks that are going to work!

mountainbiker2

All the shocks will work. Just don't go to low.






Never tried these. They are a little longer when fully compressed.




Here's a drawing of my Penske's. This was the size of my Dbl. adjustable ones. I wanted the Triple built with the same dimensions.

IRON MAIDEN

What OEM shock is that and do you have pics of the bushings that come on it?

socalman

Looks like all 3 are the same uncompressed length. The GM unit looks to have the bumpstop out, so travel would be the same as everything I've tested. (Is that the C6Z06 shock?) Although, if the overall length is the same, I have the same travel on the Bilsteins with stop removed, but can't get lower than 1" from stock without bottoming out the shock again.

May look into a C5Z rear spring and see how that works.

The Koni's you can see the bumpstop and travel is almost the same again, 3.5" travel.

The Penski's, the dimension looks to be same or longer uncompressed, as the 15-7/16 dimension drawn is to the top of the dust cover and not at the mounting point (there would be another 1/2" bushing for mounting.

Regarding 'any shock will work, don't go too low'- well, that's kinda the point of this thread. If you go more than stock (1/2" front/back) as it's designed, you'll be ok.

For those that do the aftermarket stuff, cutting front bushings, longer rear bolts- and want to get a decent looking drop (1.5" is perfect look for these cars), we're still back to square one. Sitting on the bumpstop.

I'd still like to see the Pfadts- as they told me 1" shorter, could mean all the world with lowering these cars to a decent 1-1/2 to 2" drop without doing $2k coilovers.

MTPZ06

I should clarify...when I say "shocks that will work", I mean a shock that will work on lowered suspension. I'm all the way down on stock bolts, and most likley won't go any lower unless I uprgade to coilovers $$$...especially after seeing a mythbuster thread like this one. I'd like to find a shock that won't have me bottoming out and riding on the bumpstop...even with a modest change in ride height such as mine. So far, the pfadt inverted is in the running, but there's limited feedback on these.

lionelhutz

What about LG Sport shocks?

Peter

MTPZ06

They look like a great product, but at $1500, I'd rather just kick in the extra $300 for their coilovers...or pfadt coilovers.

socalman

I would've asked for the specs on the LG, but the price (which would have been my next research) already is as stated- way too much money.

A shock (non adjustable) is a simple thing, and yet there seems to be nothing made short enough.

mountainbiker2

They are not shorter when fully compressed. I have them. They are 1/4" longer. If you guys want to go lower then just buy coilovers. If you look at the big picture, it's not that much more money over time. My car is pretty low, but I have VB&P springs. They are stiffer then Z06 springs. I can't run coilovers, because of the class I run in autocross.

Steve

socalman

Not doubting your word, just trying to clarify. For a shock that starts with a 15.5" length with a 3.5" travel, compressed would be 12"? The stock shocks, compressed is 13".

I'm trying to get to the bottom of shocks without the expense of a coilover. I want the car lower, but also interested in track and possible autocross. For now, just trying to find that secret out there where guys who are lowered, don't have to pay $2k to do it. So, coilovers is not the option here.........or is it?