[Brad Boling]

I am hearing about people runnning these HPI progressive springs on the center shocks of link cars. Is using these springs for more for a feel preference, or to get the car to possibly rotate harder than what a linear rate spring would?

Also, what weights and part #'s are available for these springs?

Thanks.

Brad.

 

[bush87]

Try this
http://www.hpiracing.com/graphics/instr/I-6751-2-V9-Color.jpg

 

[dmayhew25]

Most run either the Florescent Yellow one or the White one from HPI.

 

[slotracer577]

I have attached a file showing the spring rates of the various HPI springs from my testing. I use the yellow on my link cars. It seems to offer a better combination of planted and rotation than a straight rate spring offers. They start out on the soft side, but transition into a higher rate pretty quickly. You do have to be careful and not add too much preload or you get out of the progressive range quickly.

 

[Brad Boling]

I have attached a file showing the spring rates of the various HPI springs from my testing. I use the yellow on my link cars. It seems to offer a better combination of planted and rotation than a straight rate spring offers. They start out on the soft side, but transition into a higher rate pretty quickly. You do have to be careful and not add too much preload or you get out of the progressive range quickly.

Thats the information I was looking for.

Thanks.

 

[slotracer577]

Here is the spring tester I built. The black part is from a company called mag-dro and it can be bought at Rocklers or wood craft. I also turned a small delrin pc to act as a spring cup.

 

[swtour]

Nobody posted the part number for the FloYel spring (is that a HPI spring?)

Is it the same as the one Bruce (RC4Less) sells?

That shows 1.35" long - the HPIs show 25 and 29 mm (1.35" would be 34mm)

 

[Seven]

Nobody posted the part number for the FloYel spring (is that a HPI spring?)

Is it the same as the one Bruce (RC4Less) sells?

That shows 1.35" long - the HPIs show 25 and 29 mm (1.35" would be 34mm)

Try these 2 Joe, 6834 yellow and 6833 white.

http://www3.towerhobbies.com/cgi-bin/wti0001p?&W=000510162&I=LXN171&P=K

http://www3.towerhobbies.com/cgi-bin/wti0001p?&W=000510162&I=LXN170&P=K

 

[Jesse Bean]

Seven try these 6737! Harder is better!:thumbsup:

 

[Seven]

Seven try these 6737! Harder is better!:thumbsup:

I usually just use a turnbuckle and 2 ball cups for my center shock. It's a lot lighter than a shock!