aussiesteve

Need a heavier rear shock to stop rear end sagging under hard acceleration in 1st gear and bottoms out when changes hard into second..have upgraded rear springs 20% and shocks are thr next move..has anyone used of bought the above shocks listed above.. My car is around 1 1/2 lower due to use of 255 60 15 tires @27 1/4 inches..i had to bring the back down to accomodate the tall tires..

Zach/90\irocZ

iTrader: (6)

First is suspension stock or upgraded

aussiesteve

the detail is 10 lines long,,,, the car has heavy rear springs and hooks up,,its bottoming out at high rpm changes and i need that rear shock upgrade i need feedback on the koni or B6 HD Bilstein has anyone used it.


got full spohn fully adjustable setup allready torque rod arms and rear rod

Zach/90\irocZ

iTrader: (6)

OK just wonder if it was stock or not

I had Koni and kyb adj shocks and I love them can do full soft or firm different settings can be felt as well

Possibility shocks are just bad from hard launches as well

Twin_Turbo

iTrader: (25)

Instead of setting shocks to super stiff and stuffer spribgs set up tge suspension for more anti squat first. Good shocks are never a waste of money however. Myself I prefer the konis. Either red or yellow.

Zach/90\irocZ

iTrader: (6)

Good point seen like he mess with the adjustable suspension pieces but if haven't should be first thing as some people just bolt and go with out setting it correctly or play around with it it's sad but know people that do such thing

Forgot to mention koni yellow that i had and loved over agx

aussiesteve

Thanks guys,,
the car actually ran a 13.7 1/4 mile with a 2.78 diff!! @100.06mph..
just put a 3.42 Eaton True Track and Richmond hears 3.42:1 and wow its alive..
now i need your experience from you guys who posted above..its great to get help from others who have these cars..
not many in Australia i can ask or talk to with these cars.


The car had a new set of replacement shocks fitted Stock Gabrial basic replacements 10 years ago and the car wasnt a hot rod then and sat in my garage for years,,now its kickin and bucking through the gears at 5800rpm changes its movin and wheel spinning in 1st at 4500rpm into second and the rear shocks are simply too soft..... my suspension guy,, jumbo,s springs in my town sets up porsche cup GT3,s and has done hundreds of muscle cars over the years and made my new springs with 25% more tenssion and reccomends i buy bilsteins or koni and i for sure wont buy them in Australia @ $600 a set,, i am buying from America @ $180 BUT all the part numbers and models are confusing and i cant find anyone who can reccomend part numbers that i can buy right away from Summit or Shockwarehouse.. He told me get a set of heavier shocks and if its not enough we go back and UP the rear spring tenssion until we get it right.


There is a Bilstein B6 Heavy Duty for this car and a KYB that guys tell me isn,t much between setting 1 and 4,, The koni is what i want but at $300 U,S its a bit steep.


All my adjustable Spohn Bits are set as the told me to set them up.. i will again check the pinion angle as we had to lower the car to get the 255 60 15 tires sitting right..


I will get there eventually, and i thank you guys for giving me a hand to fly the 82/92 flag at the local strip,,not many of these cars around and i will get into the 12,s and then a brand new 427 dart SHP in winter 2017.

Zach/90\irocZ

iTrader: (6)

Shocks are probably done hence why you have issues cheap shocks and lowered car don't last very long and there old

Koni are expensive but worth it especially for the warranty

aussiesteve

Thanks for posts ,,all appreciated,,


i just realised that when i put the Sphone torque rod and package in the car was when i fitted the TH/350 gearbox,,the car was stock height,,its since been lowered a little to accomodate the 27 1/4 inch rear tires and i believe the pinion angle needs to be adjusted.


i will need to get the axle centre to ground height measured and get it up on chassis stands and use my trolley jack to get the same height as its sitting normally then check the pinion with the angle thing Sphone sent me in the package.
The rear shocks were taken off the car and suprisingly are still like new as the car wasnt driven for 10 years and sat out of the weather in a garage.
we put the shocks onto a shock tester and they came up as new with no leaks. but in saying that they arent meant for what i am now doing and were a stock replacement only.


HOWEVER i will get the koni adjustable model 25 1265 sport as apparently on first setting its as a standard shock pressure,,and the next 3 settings increase until its on 4 like a rock...i will give it a go on 2 then 3 and get up the strip and hopefully run a 12.98 or something real close.


the new gears are great and i think even though its a 7.5 inch centre it will not break unless i do something stupid.

Beater79TA

You really can't go wrong with the Koni shocks. For the price, there isn't anything better. When you buy the rear shocks, if the price difference isn't too much, get the ones for a 93 - 02 Camaro / Firebird. The rears are a direct bolt in but have the advantage of being on car adjustable where the rear Koni shocks for the 82 - 92 have to be unbolted from the axle to change the settings.

If you want to spend 3 or 4 times what the Koni's cost, UMI Performance has a nice double adjustable front strut about to hit their catalog and a nice set of single adjustable coilovers for the rear that are custom valved for them by Afco. For even more money, Detroit Speed sells a really nice set of JRI shocks and struts. Both of these options are more aimed at road racing and autocross though and not drag racing.

aussiesteve

Thanks mate,, i am getting conflicting part numbers and bilstein are a bit unhelpfull the moment i mentioned i been looking at American websites as the Aussie site mainly caters for 4X4 offroad or full on road racing porsches.


The Koni is $140 each up against the Blistein 24 - 192934 model @ $89 each..i am worried the bilstein will be too hard and you cant go back..
The koni you mentioned is the go i think and for that extra few bucks worth it at being adjustable on the car.


The KYB AGX 743019 is a budget way to go but i feel at $90 each i can go the next step and not look back with the koni if my pockets are a little deeper.


Anyway i will double check the pinion angle and contack Spohn again to double check as its summer here and i want to get up that strip again and pick up where i left off and this time get it right instead of wheel spinning all the way in first then into 2nd then heading into the other lane sideways.
My Auto gearbox man fitted one of them new high pressure oil pumps GM now sell for the TH350,s and i had my advance modified in the MSD pro billet distributor and it reaches full advance fast and doesnt drop rpm on gear changes..amazing.
i just wish i had more motor.
Thank you for help and i will go the later model koni you mentioned.
Steve In Australia.

Zach/90\irocZ

iTrader: (6)

I started with agx then when I had funds got Koni as far as cheap and bang for buck I like there agx no complaints

aussiesteve

do they have pleanty of adjustment,,i saw 1 guy say from possition 1 to 4 isnt much,,BUT i did see a big shocky seller shop say they go from 1 wich is where your basic Monroe or Gabrial shock would be from standard to 100% harder if put on possition 4,, my problem is rotten freight at $160 freight from hawks or summit $76 to Australia.. did the koni make a big difference, because if its a better choice i can get 2 rear and eventually get 2 fronts.. thank mate from San Diego,, my favourite place to live..

aussiesteve

The 93 to 03 koni shock is about $190 each and the 82 to 92 koni is best i can find is $117 to $140 each and that is the best i can find,,i get hammered with freight from America to Australia..


Anyway i will get the koni and get it to a chassis shop that sets up simmilar cars and double check everything,,loose bushes,,worn mounts,, pinion angle.. and off we go for round 2 up the local... thanks guys and all appreciated and credible advice

Twin_Turbo

iTrader: (25)

The 4th gen are twin tube... the 3rd gen are mono tube

aussiesteve

ok thank you,,will investigate,,more info is better as this is an expensive way to waste money if i get it wrong,,i need adjustment from where the stock shocks are and up a notch or 2 or 3..thank you mate

Reid Fleming

iTrader: (2)

Koni rear shock options

30-1265 sport = 3rd gen rear (Mono tube, off car adjustable)
8241-1140 sport = 4th gen rear (Twin tube, on car adjustable)

The adjustments on 3rd gen Koni rear are 0, 1, 2, 3 clicks.

0 = 0%
1 = 20%
2 = 50%
3 = 100%

The 4th gen rear has the **** adjustment. So it's a variable setting 0-100%.

Either setup will work on your car. Though for the increased cost, I'd recommend the 3rd gen setup. For most people, the 0 click setting works well for street driving/aggressive driving. 1 click works well for aggressive driving and/or if you have the front Koni struts turned up.

I typically run the front Konis on 1/2 turn from full soft (aprox 22% rebound increase). Occasionally I'll turn them up to 1 full turn (44% increase). Though with the stiff concrete roads and potholes, this gets tiring. Running the fronts on full soft takes the bumps a bit easier. But I find it responds too fast to the road at full soft. The rebound is so quick at 0 clicks that it can shake your head a bit when you're tired (driving early in the morning on the highway before a cup of coffee.....I don't notice it when driving during the afternoon when I'm awake) Turning the front **** up to 1/2 turn from soft eliminates this problem by slowing down the response a bit. Plus it handles better with the 1/2 turn without sacrificing ride quality.

With your setup with increased spring rates, I would go for the 3rd gen Koni rear shocks and set them up for 1 click. This should give a tiny bit of squat on acceleration. 2 clicks would ride too firm. 0 clicks would rebound back upwards so fast, that it might hurt your drag racing weight transition.

Regardless, the difference between 10 year old Gabriel vs new Koni shocks will be night and day difference. They are completely different. Konis just make the car more fun in all situations. Even slow driving around town is more pleasant.

I can relate to expensive international shipping. I used to live in Canada. And although it's right next door to the USA, the shipping/brokerage/customs was always expensive. Especially when the exchange rate was factored in.

aussiesteve

Great Stuff
Now i am getting somewhere.
The KYB AGX is a cheap option but the Koni is the way to go.
The Bilstein have little or no information and they steer you onto the guy selling them to give you info.
I am not paying $600 a set when i can get them in America for $90 each.


The koni will get me where i need to be with lots of variation and i will go the 3rd gen set.
it seems summit are the only ones who can freight under $80 with a 7 to 10 day service.


I really thank all the posts and appreciate it very much.

redneckjoe

another possible option if needed is "drag bags". popular as a tuning aid for launching the car.
https://www.summitracing.com/parts/a...make/chevrolet

aussiesteve

Yeh good stuff..these are great and cheap too..

Lonnie P

A few things to consider...

First the single adjustable shocks are adjustable for rebound only.
You say your car is bottoming, that's compression, which is not adjustable.

Obviously new shocks will be stiffer in compression than your stock ones, but your car should not be squatting that badly unless your geometry is off.

Do you have relocation brackets, which help the lower control arms point upward to ward the front to help keep the rear from squatting & potentially lift the rear under acceleration?

I would look at the rear bump stops to see what the distance from the axle is since you lowered it. Hitting the bump stops could be the harsh hit you are feeling.

aussiesteve

Thank you Mate


good info..


i never had this problem with the old gear set in my diff,,now the car is doing what i expected it to do and.


i see pro shocks make a duel adjustable thing but it is advertised as a drag race shock....i dont want to get into a 1/4 mile car straight line thing..
This is still a reasonable touring car that can be taken to the strip.


I feel upping the shock say to the Koni 30-1265 sport and see how it goes and before i drive it i will check that pinion angle and bump stops.


This car was original and had 225x60x15 tires on it
i stepped up to 255x60x15 which are around 1 1/2 inch higher and the car needed to be lowered 1 1/2 to begin with.


We put new springs in at 3 inch lower to compensate for tire height and to bring the car down anyway.


it was too low and we made heavier srings with 25% more tenssion and bought it up 35mm,, so its all got to be checked and geometry adjusted and re setup.


I think Spohn told he they setup the torque rods up 1% and i will check when i can get the thing up off the dround on level concrete and get under it and check.