raptere

Hello all

My 91 z28 has been having some serious suspension issues, and needs to have everything replaced. Concidering i dont know if it has ever had this done i think it is about time. As with most people i like to replace the components with nicer ones.

I hope to come up with a suspension set up that will work well for drag racing at the track but still be a reasonable daly driver.


THis is what i've come up with:

Tokico HP (High Performance "Blue") Shocks and struts
Moog replacement iroc rear springs (NOT cargo progesive version)
Moroso Trick front drag springs (Summit pn MOR-47210)
Energy suspension full suspension bushing kit (Summit pn ENS-3-18131R)


Please let me know the total comes out to about $530.00 so i dont want to buy this stuff to only have problems.

Thanks so much for the input everyone,

Eli
Raptere

iroctj

sounds like a good start

km7152

Well, it all sounds good to me. From experience I really like the Eibach pro-kit springs, and KYB Gr-2 shocks/struts. It probably comes to around that price if not cheaper with the full bushing kit you have there, and it rides real nice. Its also not too low for a street car, It just gives it a real good stance. While everything is off, add lower balljoints to your list. They are real easy with a balljoint press, $30 each for oversize(corrects the stock geometry), and youd be a fool not to do it while everything was off. Also add sway bar links to your list, if the suspension has never been done, your not getting these off the control arms to reach the springs without cutting or torching. Theyre only 20 bucks, and look cool. Oh yeah, and good luck its a fun day. Make sure you have atleast a full day to do it

raptere

Yea, what do you think about the gr2's because i was under the impression they were really cheep in price and quolity. Are you looking at a real performance part or just a stock replacement, i was under the impression that that is all that the gr2's are. I just dont want anything to be lowered anymore than it is my current exhause set up is really low, also one of the main reasons i am doing this is because the aftermarcket tires i have are rubbing on the outer rear fenderwell. so i fugure the stock springs will help to raise up the rear end a bit.

Does any one know anything about the shocks i mentioned in my set up or own them.

O quick question for km7152 are thoes new balljoints just for the lowering springs to correct that geomotry.

Thanks again everyone, keep up the ideas,

Eli
Raptere

km7152

When i asked for balljoints for my car, they said they only had the oversize ones available. So i asked, apparently they are just a correction from the original ones GM called for on our cars, or he was selling me a good story. Regaurdless, they are for stock vehicles and do not correct raise/lowering geometry. The gr-2's are supposed to be best for your money. Yes theyre cheap, but function great. With the eibach's lowering my car 1 inch, and going up 1 size in the rear...it put the back at stock height more or less, lowering the front to give it the stance which by the setup your looking at sounds like what your going for. That setup sounds fine to me also, just letting you know what works for me. Its all preference, but balljoints and sway bar links are a must, so add them in with your total cost for everything

raptere

another quick question ive been looking at the bushing kits and found there is one from energy suspension and one from prothane. The two kits seem to have slightly different parts included. Do you think it is neccisary to go with the prothane for the extra parts and extra cost. Also i had to replace my trans mound and i did that with a prothane part so if i get the prothane kit now it will be a bit of a wast but mabe i can just ebay it or something. its only a 20 dollar part and the whole kit is cheaper then buying each part indivisually.

What do you all think:
(Names are Links)
Energy suspension....169.95
Prothane..................99.95

Thanks agian every one,

Eli
Raptere

Ps: now im concidering saving the hundred bucks and getting the gr2's, ahh, such a hard decision, any one have suggestions?

km7152

Save the 100 bucks and go with the gr2's, and save the 70 dollars and go with the prothane. The only thing it doesnt include is rear sway bar links and transmission mount which you already did. If you feel the need for rear sway links they are only 20 bucks. Gr2's are well respected, and i havent heard many complaints about them. Do a search about them, i did a lot of reading before doing my suspension.

CrazyHawaiian

What will you be doing with this car? Since you mention drag race front springs I'm guessing its gonna be a 1/4 mile car. If thats the case I would get some shocks/struts for the 1/4 mile application, something like Lakewoods. Not that the other choices here wouldnt work, but if you're gonna be buying new parts and have the chance at getting something that will better fit your application you should consider it. Another thing to consider is that you dont need to do the complete suspension at once. On one of my builds I did the rear suspension first, front suspension 6 months later. I was on a budget and I didnt want to go cheap on suspension.

Not to start any trouble, but I will dispute that KYB is well respected. You should expect to get what you pay for.

Dialed_In

iTrader: (3)

The GR2's are a good stock replacement shock. They ride and perform like a stock piece.

raptere

I do plan on drag racing with the vehicle and would like to help that as much as possible, i dont mind sacraficing some ride quolity but this is stil my daly driver, so that is the only reason im worried about using different struts also. SHould that effect my daily driving too much.

ALso what kind of ratios would i want for drag racing shocks and struts.
I believe i saw 50/50 for the back and 90/10 for the front or something id assume that is bound/rebound or something , any clarification would be appriciated.

Also does it matter if the shocks are gass charged or not i was under the impression that thoes that are are better shocks or is that not true for drag shocks.

THanks for all the help, keep it up,

ELi
Raptere

Ps how much do you thinik this new set up from a warn stock set up, will help my quarter mile in launch quolity and times? My current setu up is in the first sig.

raptere

I think i have made the decision to go with the rear now and do the fronts later this summer when money permits. Ill probubly use the lake woods because yes i plan on drag racing with the car. The 50/50's for teh back and the 70/30's for the front they explain thoes are the street/strip shock and teh 90/10's are the full race, i still need to be able to dirve the car as a daily driver.

One last quick question just so i can be totaly ready to do this what else do i need to do this install, and i meen everything. Things that can brake or should all be replaced during the installation, or can most things just be tacken appart cleaned out put back together and re greased.

Thanks again for all the help everyone,

ELi
Raptere

raptere

Just found these and was wondering if they seem neccisary for my set up, i am using rear drag shocks:

Lower shock mount kit.......39.99
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ONe more thing, would this also be a good time to do things like install anti squat brackets and or new tubular lower controll arms, to my rear suspension set up? Would these really help my quarter mile permormance much?

raptere

ANY MORE THOUGHTS?????????

raptere

guess not

laiky

I would NOT be running drag springs, lakewood shocks or even KYB's for a daily driver. Assuming this car is also transportation i would go with tokico illuminas because you can easily turn them to full soft for the track and back to firm for street use, they will also help you avoid wheel hop. Drag springs are basically really soft really tall springs. Handling will be dismal with them. If you want a softer spring maybe something like a pre-iroc z28 spring or a RS spring, Maybe a v6 spring (not sure about that). I have been using polygraphite bushings for over 15 years in different cars, i like them because they do not make noise or require lubrication. You will probably want to upgrade your rear control arms to something stiffer too.

Just my opinion/experience

raptere

thanks for the input i ended up going with the street/strip lakwoods, for front and back and the springs i origionally planed. I also chose the one bushing kit without the trans mount. Im really exited to see how this might improve the feel of my car, once i get it all in, i may be back asking for help on questions regarding install soon, thanks a bunch.

If anyone has any suggestions before the install even starts on that part of the process, they would be greatly appriciated.

Thanks again,
Eli
Raptere

Matthew91-Z28

Just adding my thoughts on gr2's. They are ok and do the trick but they certainly dont blow me away. I have the prokit springs and they are not that great of a match.

1000th post only took me 3 years too.