i have a 99 si making around 500 hp i need suspension that will give me good track times.i checked out penske and it was way to much money any of u know of a good cheap drag race suspension.

 

If you do not have a wheelie bar, then go super hard ( 600 lbs. + ) in the rear with about 400 lbs. springs in the front on ground control coil oversusing Koni Adjustable shocks. The best set-up without wheelie bars.

 

Dont forget the traction bars in the front. You will need them.
If you lived here in CO I could build you some that fit the Si but thats apretty long drive for that.
Good luck at the track.

 

Oh yeah, almost forgot, my setup is 1000 lb springs in the rear and 380 front on GC coilovers and Tokico 5 way adjustables.
Best 60 foot is 1.87 with 205 50 15 BFD drag radials.
2100 lbs with driver 217 hp at the wheels.

 

where do you guys set the front shocks?stiff to eliminate liftin the front?

 

why do people go so soft in the front and so stiff in the rear? is this just whats been proven to work or what? why not run like 600-700 fronts?

 

Im guessing to keep the car from dipping in the rear.

 

I want to know also on a good race suspension that is not to expensive. 30psialldayr is your car a street car or track? What do you guys recomend for track only?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DIRep972 &raquo;</TD></TR><TR><TD CLASS="quote">why do people go so soft in the front and so stiff in the rear? is this just whats been proven to work or what? why not run like 600-700 fronts?</TD></TR></TABLE>

i think its because stiff equals less traction... you need to have some movement up and down so it hooks up, so you have soft enough suspension to let the shocks slow the movement and it hooks... thats what i think anyways

 

Exactly, if it sis soft up front the lifting movement of the car will force the weight to shift rearwards, but it wont be able to because the rear is so stiff. My car is a track only car BTW.

 

hummm im not exactly sure what your saying, can you go into more detail? I know on the rear that stiff keeps the car from squating, and the main goal is to eliminate weight tansfer, but I am still confused on front end suspension theory. I don't think you want too much movement up and down, wouldn't that allow weight to transfer to the rear and off the front wheels.

 

i think that is why its tough to set it up. you need a little movement but not too much..

 

so in a nutshell you want soft enough to keep the tires happy but stiff enough so the front doesn't lift. I wonder if anyone can go into detail on why 400-500lb springs achieve this compromise.

 

So which plays the bigger role, the springs or shocks? If you have adjustable shocks, wouldnt you want the rear on the stiffest setting, and the front on a setting or two softer.

 

could someone tell me what would be the highest suggested rear spring rate for a car that is driven on the street but for mostly racing and not daily grind. also what would it be for a daily driven car. I was told by someone that to high of a spring rate could mess up your struts. could someone help...

thanks

 

I run 900`s on the streets.

 

As far as the fronts go I would run them soft. Not too soft cause I suppose that could cause wheel hop due to not enough spring to keep the tires from bouncing. If you go too stiff it makes the weight transfer to the rear alot easier due to the stiff springs helping push the weight up off the front. I plan to run 400/900 on my street/race Integra.

-Ryan

 

"If you go too stiff it makes the weight transfer to the rear alot easier due to the stiff springs helping push the weight up off the front"

I still don't understand this. why would a stiff spring transfer weight to the rear?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecvoodoo &raquo;</TD></TR><TR><TD CLASS="quote">I run 900`s on the streets.</TD></TR></TABLE>

isnt that a harsh ride?

 

A stiff rear spring "Prevents" weight transfer to the rear.

 

"A stiff rear spring "Prevents" weight transfer to the rear."


I know and understand this, but I don't understand how a stiff front spring would "cause" weight transfer to the rear.

 

Isnt "cause" the opposite of "prevents"?

 

yes. people above are saying a stiff front spring will "cause" wieght to transfer to the rear as opposed to a soft front spring. which i don't understand.

 

thanks...but could you give me a little info on the ride and has it caused your struts to good bad....is it daily driven...an overall view on them would be great...

the reason i ask so many questions is because i called Ground Control to get pricing and spring rates...i want stiffer in the rear and i already have GC...the fist guy i talked to told me i would be fine with a 600 or higher spring rate...so after talking to a few people about my setup I was convinced i was going to get the 900 in the rear....i called back to oder and i got a different person on the phone and he freaked out when i told him i wanted 900 for the rear and i was going to drive the car on the street...he made me feel like and idiot for even saying i was going to use 900 on the streets....and that if my car was not a pro dragster i shouldn't even be considering that high of a spring rate...so now im confused.....i got two different stories from Ground Control?????????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DIRep972 &raquo;</TD></TR><TR><TD CLASS="quote">yes. people above are saying a stiff front spring will "cause" wieght to transfer to the rear as opposed to a soft front spring. which i don't understand.</TD></TR></TABLE>

Ok..if a spring is stiff it seems to me that it would aid in lifting the weight off of the front tires. If you have a soft spring there isn't as much force pushing up on the front of the car. Get me? Ok try this. Say you are running 400lbs front springs up front. Jack your car up with the 2 front tires off of the ground, now try to push up on one of the front tires. See how stiff that is? Now do the same thing with 600lbs springs instead and it will be a lot harder to push the tire up. I guess the way I am thinking is that the stiffer the spring the more force there is pushing the tires down (or the car up when it is on the ground). Again, after re-thinking all of this the spring lbs rating might only have to do with compression of the spring. So it also leaves me to believe that the strut is actually what is going to prevent rebound on the front end. *shrugs* I just don't see how a stiffer spring up front is going to prevent the front from lifting. Tony1, where are you?