Alright, so me and a friend were going through the idea of changing out my rear springs because I've had the issue of the car pushing in corners. This issue is caused by Megan Coils being an 8kg spring rate (448 lbs/in) front and rear and with BMW suspension they have to be staggered. So I'm wondering if there's a common spring rate/spring swap people do for Megan rear springs. We are also wondering if you could just order a barrel spring like the front and put them in E30 rears? As in order an Eibach spring that's the same dimensions as the Megan Spring now but barrel? I could do 650 lb/in, 6" tall by 2.25" diameter spring and plop it the same spot on the adjuster and rear trailing arm.
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Last edited by Zreberlcoe; 12-01-2014, 11:04 PM.1991 325i Calypso Coupe
Like Grandfather, Like Father, Like Son
BMW
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Don't get anything higher than a 5" spring in the rear.
2.25" ID is what E30's take in the rear for coilovers, yes - though a 2.5" ID can be used.
480/650 is stiffer, but proportional to what H&R Race springs would be. I'd think it's fine.
Raise your car a little in the front as well if you're pushing hard.
1991 325iS turbo
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Thank you for the quick reply! As for the numbers I threw out they were just random shit, just so people could get an idea as to what I'm trying to convey here. So if I went and measured up my spring for the rear that Megan gave me and got the same ID and height but in barrel and a higher spring rate, it would be compatible?1991 325i Calypso Coupe
Like Grandfather, Like Father, Like Son
BMW
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Found one thing
$65 dollars a spring is a lot though. I said 6" length because megan racing says the rear damper specs are; R: 150mm stroke; 250mm length; 44R01 valving code.
I would be looking to match the stroke with the length of the spring, right? 150mm comes out to ~5.9 inches.1991 325i Calypso Coupe
Like Grandfather, Like Father, Like Son
BMW
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No because your spring is always (or should always) stop the full stroke of the shock.
I'm running a 4" rear spring and never bottom out.
Try looking at Hypercoil.
1991 325iS turbo
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that's what GC uses for springs. i'm running 415/625 springs in and they feel very soft. if i want gonna slam my car id go stiffer. like 500/750 range.Found one thing
$65 dollars a spring is a lot though. I said 6" length because megan racing says the rear damper specs are; R: 150mm stroke; 250mm length; 44R01 valving code.
I would be looking to match the stroke with the length of the spring, right? 150mm comes out to ~5.9 inches.Much wow
I hate 4 doors
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Whats up Zack? Im excited to try this over your winter break. If it works out, I will be selling my setup to go with some cheap coilovers also!94 E36 LS1 drift car too much to list!
87 325 IS vogtland/kyb, str 15x8, 225/50
96 E-350 diesel 4wd van, lifted 6, 35" on 20s, full DVD stereo tow rig
02 tahoe lowered 3/5, color matched 20s, full stereoComment
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I was like "jeepster666 who the fu..." then it was some gay boy with an lS1 E36 drift car;)
Anywho, get coils and lets put them in. I come back the weekend of the 12th!!
Hmm, I don't think being really slammed is what I want right now, just a well handling car.that's what GC uses for springs. i'm running 415/625 springs in and they feel very soft. if i want gonna slam my car id go stiffer. like 500/750 range.1991 325i Calypso Coupe
Like Grandfather, Like Father, Like Son
BMW
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