HFP Suspension Review

[sf-si-02]

Originally Posted by Garrison

Civic Suspension Specs

Body: Springs F/R lbs/in - Sways F/R mm
Sedan: 140/145 - 24.2/10 (12mm rear on Hybrid) Sedan Si: TBD/TBD - 27/17
Coupe: 170/200 - 25.4/11 (DX has no rear bar) Coupe Si: - 200/230 - 28/17


Civic Coupe Exclusive Suspension Tuning...
The Civic Coupe has the following exclusive suspension tuning compared to the 2006 Civic Sedan:
* Front spring rate increases 20 percent
* Rear spring rate increases 28 percent

Civic Si Exclusive Suspension Tuning...
The Civic Si has the following exclusive suspension tuning compared to the 2006 Civic Coupe:
* Front spring rate increases 17 percent
* Rear spring rate increases 14 percent

NOW... Based on this, we have to work backwards. The Si models have a spring rate of approximately 200 lb./inch front and 230 lb./inch rear.

Subtracting 17% front on my LX Coupe puts the front spring rate at about 170 lb./inch and the rear at about 200 lb./inch.

Comparing the LX/EX Sedan down from the LX/EX Coupe puts the approximate front spring rate at about 140 lbs./inch and the rears at only about 145 lb./inch.


This is courtesy of DakRaven. He sent this to me.

If you cannot yet foot the bill for hfp, I'll sell you all my si suspension parts....

[Garrison]

I have a local set I am going to buy when Dak gets his hfp kit.

[sf-si-02]

Originally Posted by Garrison

I have a local set I am going to buy when Dak gets his hfp kit.

you should check the prices

[goodtimes]

Originally Posted by Tim

I don't like wheelgap. I think I'll keep this one on a backburner for now. I don't want to put these on without first seeing what the aftermarket turns out in terms of struts that might pair well with the Eibach springs.

thats what i was thinking also.

[Tom1222]

Originally Posted by cappykd

It's a full kit with pre assembled front struts and springs and rear shocks and springs. Much better handling. 3 hour install.

Cool I want some

[Rocco]

i deff want the HFP suspension for my sedan..i want a little less wheel gap..the HFP should help right?????

[Garrison]

I have heard .08 in front and 1 inch in the back?

[MutantCheese]

Yes, the hfp kit will reduce wheel gap by about 1 inch.

[mattsbobo]

So in you guys oppinion, would you do the HFP suspention, or Tein coilovers? Correct me if i'm wrong, but after the HFP install, you basicly just plug and play right? If you got the Tein's then you'd have to worry about camber adjustment, and possibley bottoming out. Is that correct? Suspention is a few mods away for me, but I'm trying to figure it out now. I've heard such good things about the HFP from everybody on the site, and what I'm looking for is basicly a stiffer, lower suspention with none of the headaches associated with more complex setups. Would that be the best way to go? Sorry about being so long winded

[Garrison]

Originally Posted by mattsbobo

So in you guys oppinion, would you do the HFP suspention, or Tein coilovers? Correct me if i'm wrong, but after the HFP install, you basicly just plug and play right? If you got the Tein's then you'd have to worry about camber adjustment, and possibley bottoming out. Is that correct? Suspention is a few mods away for me, but I'm trying to figure it out now. I've heard such good things about the HFP from everybody on the site, and what I'm looking for is basicly a stiffer, lower suspention with none of the headaches associated with more complex setups. Would that be the best way to go? Sorry about being so long winded

HFP kit is my choice!!!

[holikz]

what are the measurements on the gap? Mine is stock suspension with 18' HFP. Im new on suspensions so I can say that the front is 3 fingers and the back is 2.

Originally Posted by GeezerSi

This is mine on HFP suspension

[2000civic]

Man I just wish it lowered the car more! I hate the wheel gap! I am very split on what I would like to do with the cars suspention, I want HFP, but on the other hand I do not like the ride height that it gives. HFP would most deffinitly get my vote if it completley eliminated the wheel gap. Idk, Im probibly going to end up getting coilovers. Sorry guys I hate that gap.

[cappykd]

Originally Posted by 2000civic

Man I just wish it lowered the car more! I hate the wheel gap! I am very split on what I would like to do with the cars suspention, I want HFP, but on the other hand I do not like the ride height that it gives. HFP would most deffinitly get my vote if it completley eliminated the wheel gap. Idk, Im probibly going to end up getting coilovers. Sorry guys I hate that gap.

Don't be sorry. Do what makes you happy. I drive 45 miles of twisty canyon road each way every day, so for me the drop wasn't as important as handling.
If the drop is more important that handling, then do what makes you happy.

[cappykd]

Originally Posted by mattsbobo

So in you guys oppinion, would you do the HFP suspention, or Tein coilovers? Correct me if i'm wrong, but after the HFP install, you basicly just plug and play right? If you got the Tein's then you'd have to worry about camber adjustment, and possibley bottoming out. Is that correct? Suspention is a few mods away for me, but I'm trying to figure it out now. I've heard such good things about the HFP from everybody on the site, and what I'm looking for is basicly a stiffer, lower suspention with none of the headaches associated with more complex setups. Would that be the best way to go? Sorry about being so long winded

HFP is "plug and play" although you still need to align it. HFP also comes with replacement nuts and bolts as some of the ones used to install the factory suspension are not meant to be re-used.

[MutantCheese]

Originally Posted by cappykd

I drive 45 miles of twisty canyon road each way every day, so for me the drop wasn't as important as handling.

Drool, flatsville here....grrrr

[DakRaven]

The spring rate research was done by Mario, I just condensed it for future reference. I am still looking into determining the Si Sedan rates.

There are different HFP kits for the different models and trims due to weight and weight bias.

For example: The Sedan has two versions; 08W60-SNA-100A and -100B. A is for the Auto trans and B is for the Manual due to different spring rates. The manual is 65lbs lighter in the nose than the Auto so the front springs have less rate compared to the slushbox.

For the Coupe, there are also two versions; Si (08W60-SVB-100) and non-Si (08W60-SVA-100). The Si Coupe is a heavy pig (2877 lbs, compared to the EX Sedan at 2804 lbs). Weird huh? It has the largest sway bars and the highest spring rates. (The front Sway is even larger than the SI Sedan).

That being said; you can get more drop and a softer ride by putting the Sedan kit on the Coupe. Bottoming out, however, could occur more often with this setup.

Another way to reduce wheel gap is to install a taller tire. The Si tire is a 215/45-17 and measures 24.618" tall. My Accord has 215/50-17 tires that are 25.465" tall. Bye-bye gap, hello ground clearance. It looks dropped even though it is not.


Sorry the pic is so bad, I'll get some better ones over the weekend.

This is a 2006 EX Sedan with Si Sedan front suspension and stock springs with HFP dampeners in the rear. Needs a shorter/stiffer spring and a little more bar for the back, but this little jewel will actually handle for a daily driver.

Hope that clears some things up.

[AbsoluteGG]

How much is the whole HFP kit like 3k? I know the mechanic (family friend) at the honda dealer and he said he can get the whole kit including fog lights for 1,500 and he'll install it himself. I really wish i could of just gotten the kit when i first bought the car but now im kinda relieved that im getting a better deal.

[goodtimes]

But no one know the spring rates for the Si's HFP suspension?

[DakRaven]

Originally Posted by goodtimes

But no one know the spring rates for the Si's HFP suspension?

I have been unable to find any claims of rate increase for the HFP Springs. It is entirely possible that the rate remains unchanged and the length is merely shortened.

[sf-si-02]

Originally Posted by DakRaven

I have been unable to find any claims of rate increase for the HFP Springs. It is entirely possible that the rate remains unchanged and the length is merely shortened.

No way, it is certainly stiffer, which would not have anything to do with the dampners