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Old 01-08-2019, 01:42 PM   #1
stevE85
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Default LS 240 Front Spring Rate

I'm at the final stages of my 244 conversion. Combo is L33(Alum. block 5.3L), 7675 Turbo, T56. Car has PS only. So, my question is for those of you with similar combos/front weight is what spring rate makes for a good performance street feel? I have 300/lbx10" now, and it's pretty soft. Thinking a 350-400 might be better suited. Thoughts/suggestions? Car has revalved Bilstein short struts with 2.5" coil over springs.

I should also note I have about 1.5" of spring preload now.
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Old 01-08-2019, 02:18 PM   #2
JohnMc
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Curious for knowledgable responses to this.

My very rough impressions, after pulling my 16VT/T5 drivetrain and sticking in an LH8 (alu Gen4 5.3)/CD009 is that so far, I think it's sitting a little higher in the front than it was. It's still missing some parts (radiator, mostly).

I wish I'd bothered to get a hoist scale when I was hauling the engine/trans in and out and about so I could put firm numbers on it.
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Old 01-08-2019, 03:34 PM   #3
cosbySweater
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I'm running short strut coilovers on mine with bilstien hds, I'm running a 400x9inch spring in the front and it feels pretty damn good. However, I'm lifting the car back up and getting rid of that setup here soon.
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Old 01-08-2019, 04:23 PM   #4
stevE85
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Erik, have you tried any other springs? Also, are your springs pre-loaded at all?
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Old 01-08-2019, 11:55 PM   #5
cosbySweater
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Originally Posted by stevE85 View Post
Erik, have you tried any other springs? Also, are your springs pre-loaded at all?
I preloaded the springs, don't remember how much 300 was way to soft and I ripped my fender liners out. Going to 140x14in springs and a higher ride height
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Old 01-09-2019, 04:01 AM   #6
Texas240
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With my lm7 Im back to running 350lb x 10" almost compressed. Running Gaz front struts from Yoshifab, Ride is fairly good.
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Old 01-09-2019, 01:09 PM   #7
stevE85
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Thanks for the replies, just ordered some 375lb x 10's. I split the difference. I'll report back once I swap the springs in and recheck front ride height. I measured my current sag at 1.75-2" with the 300lb spring preloaded 1.5" as stated earlier. Hoping for only 1" sag with the 375's.
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