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Author Topic:   Shocks
rikyt74
Dirt Roller

Total posts: 24
posted March 02, 2005 09:33 PM  
I am just starting out with a modified 4 bar car. I need information on shocks I run 1/4 mile tracks. I have 3175 on the front and 3193 Carrira's on the rears. I was told there is a better shock number for the left rear than the 3193 but it is TOP SECRET and they won't tell me.Can anybody help me out with a shock number for the left rear?

badfastjr
Dirt Maniac

Total posts: 193
posted March 02, 2005 10:14 PM  
maybe they were talking about running a 3 in 5 out shock on the lr, ive heard of a ton of guys doing this, I think its supposed to make the car tighter coming off for dryslick tracks

[This message has been edited by badfastjr (edited March 02, 2005).]

sdracer12
Dirt Maniac

Total posts: 180
posted March 02, 2005 11:44 PM  
Your numbers look pretty normal for a 4-bar car starting point. If it is early in the night and track is heavy, you can put 94's on the rear of car instead of the 93's. A 94 on the rr will help keep car from getting too tight on entry when there's traction.

The lr shock setup you are talking about is a soft EXTENSION, stiff COMPRESSION. This would be like a 2 rate extension with a 6 rate compression. Afco #'s are 96-2, Bilstein is a 20-60. You can use this shock on the LR when it gets dry slick. It holds the car up on the lr on corner entry. This allows your car to turn in well and not slam down on the LR and dart right. Concentrate on corner entry, don't worry about the exit. If your entry is good, exit will automatically get better.

If you are just starting on a 4-bar, you'll probably want to keep the car pretty neutral and stay close to your chassis builder's reccomendations until you know what the car wants. It's easy to make these cars really work well, but its also asy to dial them way out of the park, too lol. Have a great year.

rikyt74
Dirt Roller

Total posts: 24
posted March 03, 2005 08:07 AM  
I think that is the TOP SECRET shock they are not talking about on the left rear. I can see the other race cars go in the turn and stay up.
I thought the shock might be holding the car up, now I know more.
Thanks for the information.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted March 03, 2005 08:32 AM  
it is like sdracer12 is talking about, it is a easy up hard down shock. like a 972 is a popular one so is a 962 in afco numbers of course, teh bilstein numbers are backward.

rikyt74
Dirt Roller

Total posts: 24
posted March 03, 2005 08:45 AM  
What would the Carrera number be?

trasrat89
Dirt Full Roller

Total posts: 46
posted March 03, 2005 09:06 AM  
Would that 20/60 LR shock work on a short bar 2-link?

rikyt74
Dirt Roller

Total posts: 24
posted March 03, 2005 12:14 PM  
Hey sdracer12
The Bilstein number for the left rear is it a 60-20? I can't find a 20-60

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 03, 2005 12:18 PM  
In a bilstein it should be 20/60 and I think it is a custom shock.
Same with Afco, Pro etc. anything over a 5-3 is custom unless they have changed.

rikyt74
Dirt Roller

Total posts: 24
posted March 03, 2005 01:04 PM  
What do I have to do to get one? Who can I order it from?

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 03, 2005 01:08 PM  
Find a dealer for your brand of shock and ask them to special order the shock you need. You might be able to go to the brand website and find out if you can get them online.

rikyt74
Dirt Roller

Total posts: 24
posted March 03, 2005 01:31 PM  
Thanks dirtbuster,
I just ordered 20-60 from Bilstein.

badfastjr
Dirt Maniac

Total posts: 193
posted March 03, 2005 06:38 PM  
what could be the reason for the guys running 3 in 5 out shocks on the lr.

Scottavery
Dirt Roller

Total posts: 18
posted March 03, 2005 07:11 PM  
Hi
You might go to www.naake.com, they have the QA1 50 series driver rebuildable steel shock fo $85.00 dollars each. They will also valve for you at a reasonable price.
Scott

drt mod rcr
Dirt Roller

Total posts: 10
posted March 03, 2005 09:14 PM  
trasrat89 Yes that would work on a 2 link

HarrisMod#30
Dirt Freak

Total posts: 353
posted March 05, 2005 03:09 PM  
so in short if i want a 96-2 i will have to special order it? Also if i decide to order a Bilstien 2060, will this create problems with running a bilstien on the lr and Pro shocks on the other 3 corners?
Thanks

[This message has been edited by HarrisMod#30 (edited March 05, 2005).]

dirtracer14
Dirt Forum Champ
Total posts: 1261
posted March 05, 2005 08:25 PM  
Harrismod30 I would say yes i would run em on all corners or depending on your car atleast 3 i run a old afco on my lf its a 6/2 and is only used to keep the tire from slaming to hard down.....i will get a bilstein on this year thow

sdracer12
Dirt Maniac

Total posts: 180
posted March 05, 2005 10:36 PM  
Another option might be a QA1 for the left rear, if you are not running gas pressure monotube shocks like Bilsteins. I think you can get QA1 shocks in custom rates, too.

rikyt74
Dirt Roller

Total posts: 24
posted March 06, 2005 07:08 AM  
I have tried to find the Bilstein number for a 3175 for the fronts.I am not sure if I have the correct numbers. Before I order them I would like to make sure. Can somebody help me with the front shock numbers for the front in Bilstein's?

badfastjr
Dirt Maniac

Total posts: 193
posted March 06, 2005 09:11 AM  
im not a 100% sure but i think the biltstein number is something like s7z5050

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"son this aint a car its a racin' machine."

rikyt74
Dirt Roller

Total posts: 24
posted March 06, 2005 12:25 PM  
What is the deal with the 1 5/8, 36mm Bilstein front shocks.Are they good to use? I see some of the guys using them but don't know if I should.

sdracer12
Dirt Maniac

Total posts: 180
posted March 06, 2005 11:31 PM  
Yes that is the right number, a S7Z-5050 steel 7" long, digressive valve, 5 rebound, 5 compression. A straight 4 rate shock is a 4040, etc. The best situation is to either run 4 monotube gas-pressure shocks on the car, or 4 twin-tube shocks (like Pro or Afco). It gets tricky when you mix and match both kinds.

As far as the 36mm small shocks, I run them on the front. And yes, they do break more often. BUT, I've never broken one under normal use. It was always caused by contact with another car, the wall, etc. etc. The nice part is they are smaller for more clearance, they are cheaper, and if you break the rod-end off the mainbody, you can just weld it back on and your good to go.

I've talked to several Bilstein reps, including Rex Merritt, and there is no performance difference between the small body shock and the big body shock. They also don't fade, at least not in a race of under 100 laps. The only difference on the shock dyno was a small difference in the valving. If you use a S7z5050 big body shock, you need a 5555 small body shock; a S7Z4040 is the same as a 4545 small body shock.




HarrisMod#30
Dirt Freak

Total posts: 353
posted March 07, 2005 02:46 PM  
ok thanks, ill just order a custom job from pro, appears to be the same price as a bilstien according to my catologue.

avenger 11
Dirt Forum Racer

Total posts: 88
posted March 07, 2005 03:13 PM  
I just picked up an Afco 97-2 at JR MOTORSPORTS in Ankeny IA.They had it right on the shelf as well as some of the other extreme valvings.

rikyt74
Dirt Roller

Total posts: 24
posted March 07, 2005 03:41 PM  
I have never run Bilstein's before but I decided to order a 9Z4040 for the right rear and a 9Z2060 for the left rear and S7Z5050 for the front. What do you guys think about this combination?

zeroracing
Dirt Forum Champ
Total posts: 1875
posted March 07, 2005 03:53 PM  
That does not sound too bad, i usually run 30/30 big body across the back and 5555 lf and 4545 rf. but those shocks you listed should be a good starting point. i use the small body on the front. light and compact.

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