Will a HU2890 Tokico fit a 94??

[Q45dude]

Hi,

I have 94 q45 and need to find out if a Tokico HU2890 fit my car. Description I found states from 90-2/93 and the HU2890A is from 2/93- what ever. So does it mean HU2890 will fit my 94Q45?? (These are the front struts)If anyone can help me, that'll be great.

Thanx

[qship96]

no, it wont fit, use the part made for the 94-96 the 2890A model

[Kiven422]

Can you elaborate? What are the differences from making it fit correctly?

[qship96]

[QUOTE=Kiven422]Can you elaborate? What are the differences from making it fit correctly?[/QUOte

90-93 Q has a smaller diameter lower attachment assembly than the 94-96Q, the 2 different part numbers mentioned in original post are sized to fit either the 90-93, or the 94-96Q

[Kiven422]

ahh i c thanks.

[Q45tech]

The inside diameter of the bottom mount is different...................... might be possible to grind out a HU2890 to fit on HU2890A mounting pin but not recommended for safety reasons.

[Rex]

As mentioned the older Q (pre-93) has a smaller lower mounting point, thus they do not fit the 94-96 Q45. it's only a 2 couple mm's, but I can tell you it's just easier to get the right part.

IIRC, the 90-93 lower mount is 22 or 23mm, the 94-96 is 25mm.

[Q45tech]

Intentional design to avoid early stiffer oem shocks from ending up on softer 1994 design.

[maxnix]

Intentional design to avoid early stiffer oem shocks from ending up on softer 1994 design.

Strange that lighter earlier G50 would have harder springs and higher rate shocks than heavier later.

[qship96]

Strange that lighter earlier G50 would have harder springs and higher rate shocks than heavier later.

I have never seen this documented in official Nissan publications, has anyone? Maybe internet myth ?

[Rex]

Seems this "may be" another thing they did to try and attract more (main stream) luxury car buyers after the soft sales early on in the model life.

I wonder how things would have turned out if they'd used the cars int he commercials the first few years .

[maxnix]

I have never seen this documented in official Nissan publications, has anyone? Maybe internet myth ?

Neither have I, but we know there were two different steering rack ratios, but now there is only one part number.

Seems like if the spring rates weren't changed, neither would the shock rates change.

[Q45tech]

Remember shocks have 4 different stiffness rates:Fast and slow piston movement and compression and rebound.FSM only lists compression and rebound rates at ONE RATE OF CHANGE1.00 foot per sec or 6" per 500 milliseconds*

No one said anything about different springs just different SLOW REBOUND RATE and FAST COMPRESSION RATES

Humans cannot cycle a new shock from full compressed to rebound [expanded] in 1/2 second...........most non weight lifting champs cannot do it with a 60k worn out unit in 1/2 second or even 1 second.

Springs or shocks over a common small [+-20%] range don't have much if anything to do with handling just the ride comfort.

Shocks just slow down the storage or release TIME of spring energy.

SO TIME is the key here.

I forgot the THIRD factor shocks have another valve which compensates for the changes in viscosity of fluid to reduce the variances caused from single bumps vs multiple bumps over a short period.

Winter shocks vs Summer Shocks would be a hassle for most so the compromise is never right just tolerable!

* Take some time and calculate the shape of a speed bump/pothole that would exercise the FRONT shock in the time period specified at different road speeds.

Assume the tire has a 1200 inch/pound side wall stiffness, everything else is given in the FSM for early Q

http://www.proshocks.com/calcs/2spgrate.htmshows that 146 spring + 1200 tire = 130 pound inch effective spring not counting rubber top spring seat. Use 125 as a good guesstimate

note that a [73worn-112new] front shock COMPRESSION is 73/125 - 112/125 or 58%- 89% as stiff as the front effective spring/tire/mount rate

AND 165/125 - 223/125 or 132% - 178% STIFFER than the effective spring in EXPANSION [rebound] control.

So under an ideal bump the shock SLOWS the compression by 75% and SLOWS the return to normal ride height [rebound] by 155% or twice as much...............this is no accident of mathematics.

[Q45tech]

Not sure how many strong owners can lift the front bumper on a Q 3" in 1/4 second to properly test the condition of front shocks?

As we have seen previously the compression [rate] pushing down on bumper is twice as easy on shock as lifting up. Yet it feels twice as hard due to spring compression.

Don't confuse spring stiffness with shock stiffness.

[maxnix]

Great Liink with lots of useful calulators.

Food for some serious thought. The next "dub" poster should be referred to these calculators for some meaningful study.

[jonseyq45]

All I know is , if you hit a speed bump and your front end keeps bouncing long after your head does. Replace the front struts.

Q45Tech provided some great info. Springs = support, Shocks\Struts=Control. Combining the 2 gives you your ride.......

Oh yeah,,sway bars fit into this, but that's for another day.

Jonsey....

[qship96]

Might not want to wait that long for best results

[maxnix]

It's amazing how many realtively new Detroit cars I see bobbing a long when my 13 yearold shocks (soon to be replaced) do just fine in limiting the oscillations.

Then my 18 year old Acura double piston are still firm and well in control. Quite a difference from my 1977 Accord which were gone in 20K miles.

[AlabamaDan]

It's amazing how many realtively new Detroit cars I see bobbing a long when my 13 yearold shocks (soon to be replaced) do just fine in limiting the oscillations.

Your shocks are 13 years old! Isn't that what we refer to as neglect? And from you of all people.... jk

[jonseyq45]

Shocking...isn't it

[qship96]

It's amazing how many realtively new Detroit cars I see bobbing a long when my 13 yearold shocks (soon to be replaced) do just fine in limiting the oscillations.

Then my 18 year old Acura double piston are still firm and well in control. Quite a difference from my 1977 Accord which were gone in 20K miles.

Brian I am shocked{no pun intended} YOU have original shocks on your Q!I replaced original factory shocks at 105,000 in early 2003 with blues-they now have 105,000 on them, and seem to be in good condition still- much better than the factorys felt after 105,000 miles! The boots I replaced in 2003 lasted slightly over 2 years before they started to come apart.Will probobly replace shocks/boots later this year if I can make it to T3 to redo lower control arms/third links that seem ok, but must have worn bushings,etc by now {210,000 miles}

[maxnix]

Brian I am shocked{no pun intended} YOU have original shocks on your Q!

Well, they are on mom's car and lasted much better than the Q45t which leaked at 43K miles.

Comfort around town is paramount for her, and as they are still in control, it will be the next thing after under plenum.

[qship96]

Did you put blues on the T ?

Might want to do moms shocks in spring so by the time cooler weather rolls around they will have softened up a bit- I did mine in Feb. and it was quite a stiff ride for the first 5000 or so miles,made worse by the cold weather.