1993 Q45 spring rate?

[unknown007]

Anybody know where or how i can find it?Or if you already know it?Let me know please thanks.

[qship96]

About 1/2 the rate of the Espilir springs.

146 front123 rear

[unknown007]

so what spring rate you suggest if i get some coild done for some sleeve on coilovers?would the 300zx sleeve on coiovers fit the Q45?let me know thanks.

[Q45tech]

Front springs are 143 pounds per inch and rears are 123. Info is spelled out in detail in your FSM.Since springs and shocks are vertical and mounted to hub directly there is very little geometric correction required unlike the post 2001 models.

[unknown007]

Front springs are 143 pounds per inch and rears are 123. Info is spelled out in detail in your FSM.Since springs and shocks are vertical and mounted to hub directly there is very little geometric correction required unlike the post 2001 models.

Okay thank you very much.I looked what page is it on i couldn't find it.

So i should get the sleeve coilover spings to be 143 in front and 123 in rear?

[Q45tech]

It is the ratio that is important 54/46%, obviously you can utilize stiffer rates as long as you don't mind the harshness that increases with higher rates.

[unknown007]

well what spring rate you suggest?im looking for a rate that wont make the car too bouncy and scrape.My auto teacher said i should go with a little stiffer maybe 150 lbs per inch in the front.It was a guess but i feel like you know more any suggestions?

[Q45tech]

The front is already 143. Eibachs are 133-135 on front. Need to understand the purpose of changing springs, what you wish to accomplish. Lowering can reduce the body weight transfer load on the tire in a turn but the usual 1% change [15-20 pounds per front inch @ 0.8G] is not significant.

[unknown007]

yeah i understand but im going with ground control springs.the coilover sleeves from them.think the 300zx would fit it?all they said is if it fits just to tell them the spring rate desired.What would you choose if you were to lower it?

I figure out the math later tonight.

[Q45tech]

With no adjustable sway bars spring rate selection is critical in setting the over, neutral, or understeer ratio.

The stock Q is set neutral from the springs with no rear passengers and half a tank of gasoline in the first 1" [0.3G] of body roll.

As the front sway bar uses up its rubber bushing slack it goes more towards understeer [0>15%] as the roll and G load increases.

The 95 [1521 pound] tire load index on front is what limits the peak G handing capability. Because the 1100 pound static load grows by 400+ pounds as the body rolls and weight transfers = overloading tire.

A 98 or 100 load index tire on the front will do more for peak handling ability than any suspension modification regardless of cost!

[unknown007]

im kinda lost but i'll reread it.But before i install these i'll be replaceing the lower/upper arms and tension rod.So no perferd rate you'd get?

P.S.you trying to say to get a 98/100 load index tire on the fronts?

Well thanks for helping me it's like your a talking genius computer lol