What spring rate ? - Lateral-g Forums

Sheck44 · #1 06-03-2015, 03:48 AM

Ok guys, just checking to see what you guys are using for front and rear spring rates for a street driven car with an LS based engine with performance in mind. Reason I am asking is my setup with 600Lb springs in combination with Viking DA's up front seem to be quite harsh. Just an FYI, I also have a speedtech torque arm in the rear.

I know there are calculations for this, but I'm just interested to see what others are using with their LS setups.

Cheers
Steve

frojoe · #2 06-03-2015, 12:08 PM

I presume you're using the coilover-conversion Vikings that use the upper spring cup in the subrframe (identical to the QA1 design)? These have a long spring, so 600lb/in is pretty huge. On my iron block turbo LS motor I used 450 lb/in springs for a bit on QA1 conversion coilovers, and they worked well but were a bit squishy. I would've changed to 500 or even 550's if I decided to track my car on a regular basis.

I see you are running a N/A aluminum block LS7 I would suggest 450 for a fun street car, 500 for street/track car.

Sheck44 · #3 06-03-2015, 02:30 PM

Thanks Joe, appreciate the feedback yes you are correct on my setup (with the exception of NA) and That's kind of what I was thinking.

Steve

Rod P · #4 06-03-2015, 07:56 PM

I run 750lb 8" hyperco front springs and 250lb 12" hyperco rears.....6.0 LS car

Sheck44 · #5 06-04-2015, 03:08 AM

Talked to Roger at Speedtech yesterday, he reconfirms I should stick with the 600's and play with them a bit ... there seems to be a large variant on what guys are using from 450 to 750.

Cheers
Steve

Gscherer78ta · #6 06-04-2015, 05:42 AM

I am running 750# springs on 2" drop for my 2nd gen TA with stock control arms/bushings right now and some PTFB "racing shocks". I am finding that these shocks can't handle that spring rate and am about to pull the trigger on the Viking DA 19 position shocks for this set up. Anyone have any comments on the Viking DA 19 position shocks?