318is GC Spring Rates

[asubimmer]

I have a 91' 318is and I might be getting some GC coilovers soon. The lowest I can go in the back is 650 so what would be good for the front? There is tons of oppinons on the 6's like running 550/650 so what would be best for my 4? Would a 475/650 be neutral for the m42? 2002maniac how does it handle? I need to decide asap so take it away!!

I run 400/600 in my 318is and have had it on the track twice with this setup. Even with uprated sway's (cabrio/m3) there is still body roll and I canl feel the weight transfer fine. I think 475/650 sounds about right for a track day only car.

[nando]

why don't you call GC and ask them? I'm sure they will know more about their suspension than most people here.

[Rob]

I'm curious, why must you have 650 in the rear?

[asubimmer]

I'm curious, why must you have 650 in the rear?

b/c of the gb...thats the lowest they are selling...but thats cool because I want stiff ones anyway. Does anyone have GC's #?

Thanks guys

[Rob]

http://ground-control.com/

i'm willing to bet its on there somewhere

[asubimmer]

k..I just called them and they said that 550/650 should be pretty neutral for the 318is. Does that sound right? b/c that is what most of the 325's are running here and the m42 does not weigh as much as a m20. I didn't sound like he was typing and looking anything up...he just said 550/650 sounded good. Anyone got any personal experience w/ gc's on a 318is?

thanks again for all the help

[Rob]

once you get the turbo and all the plumbing in, the weight will be perfect ;)

[asubimmer]

once you get the turbo and all the plumbing in, the weight will be perfect ;)

haha you might be right there :) I really want to get the turbo in soon...but I still need a "cat", injectors, and a fmu...I have a 40mm tial wastegate that I might be getting. Hopefully I can get the stuff soon enough to do it this Christmas otherwise I won't have time till this summer b/c of school :(

haha and also it would be fun running SM novice ;) vvrrroooooommmm psssshhhHHHHHHHHHHHHHHHHT!!!


hahahahah I hope you like all the smilies ;)

[asubimmer]

bizzump

[royalflush313]

k..I just called them and they said that 550/650 should be pretty neutral for the 318is. Does that sound right? b/c that is what most of the 325's are running here and the m42 does not weigh as much as a m20. I didn't sound like he was typing and looking anything up...he just said 550/650 sounded good. Anyone got any personal experience w/ gc's on a 318is?

thanks again for all the help

550/650? Sounds pretty damn stiff! I know some guys run high spring rates like that, but aren't their cars track oriented?

I have 300/500 on my 318is, and I wouldn't go much stiffer if it's a daily driver. As it is, it's not fun driving through bumpy roads.

[asubimmer]

550/650? Sounds pretty damn stiff! I know some guys run high spring rates like that, but aren't their cars track oriented?

I have 300/500 on my 318is, and I wouldn't go much stiffer if it's a daily driver. As it is, it's not fun driving through bumpy roads.

well...w/ the group buy the lowest rear spring rate is 650 so I don't really have much choice to go softer ;) I do auto-x my car as well as street it but I'm not too worried about a harsh ride.

[PeaveyBassist]

My bro's mechanic out in Oakland, CA autox's a LOT and is a very good driver. His 318is (m10 powered) has GC's. 500/700.

Will

[asubimmer]

My bro's mechanic out in Oakland, CA autox's a LOT and is a very good driver. His 318is (m10 powered) has GC's. 500/700.

Will

how does it drive...neural..over or understeer? I don't know a ton about the rates thats why I'm asking but that seems like it would not be neutral.

[royalflush313]

well...w/ the group buy the lowest rear spring rate is 650 so I don't really have much choice to go softer ;) I do auto-x my car as well as street it but I'm not too worried about a harsh ride.

well is 650 something that you 'want' or something you are forced to want without a choice?
I don't know how much you are saving, but probably not anymore than 50-75 bucks I assume. You should just get what you want and pay up. It's cheaper than having to buy new springs later on.

I'm sure there are others with a 318is running GC Coils. Even my 'waffleswaffleswaffleswaffleswaffles-spring-rate' is as stiff as, or stiffer than most other race springs, so I don't see why people want anything stiffer for a daily driver.

[asubimmer]

well my car is a dd/auto-x car...I would like to do some track events though. I don't know a ton about spring rates so I don't know "how" stiff 650 is other than really stiff ;) I have bav suto springs right know..does anyone know what rates those are just as a comparison. and like I said I'm not really worried about a harsh ride...I just don't want it to hurt (ie rip apart) the car.

thanks for the help guys,
Charlie