[ranlangdon]

Hey all!

I have an F33 440i xdrive convertible and am not sure which parts to get for lowering. My goal is mainly aesthetic; I want to maintain oem ride quality/comfort as much as possible. I will never be hitting the track.

So I'm thinking Eibach springs plus some bump stops, maybe the oem F80 ones. But the problem is that neither the 440i xdrive nor the F33 has a recommended spring model from Eibach apparently.

So my question is, will the springs recommended for the 430i xdrive coupe (eibach-e10-20-031-04-22-pro-kit) fit my car?
And similarly, will the F80 bump stops fit as well?

Any insight or advice is appreciated!

[alohasurftoad]

Originally Posted by ranlangdon

I have an F33 440i xdrive convertible and am not sure which parts to get for lowering. My goal is mainly aesthetic; I want to maintain oem ride quality/comfort as much as possible. I will never be hitting the track. So I'm thinking Eibach springs plus some bump stops, maybe the oem F80 ones. But the problem is that neither the 440i xdrive nor the F33 has a recommended spring model from Eibach apparently. So my question is, will the springs recommended for the 430i xdrive coupe (eibach-e10-20-031-04-22-pro-kit) fit my car? And similarly, will the F80 bump stops fit as well?

take my suggestion with a grain of salt. i would use one of these Eibach Pro Kits. fronts are the same axle load, thus same front spring. rear axle load of the F31awd is 10kg higher than the F33rwd. i would speculate that your rear spring should be for a 1295 axle load. between the choices, the F31awd rear should sit higher than the F33rwd rear. F80 bumpstops fit regardless of spring.

for 440i RWD convertible. rear axle 1290kg
https://eibachshop.com/index.php?p23...-4-convertible

or F31(wagon) 340i x-drive. rear axle 1300kg
https://eibachshop.com/index.php?p24...-bmw-3-touring

personally, i'd probably just go with the F33rwd springs

[ranlangdon]

Originally Posted by alohasurftoad

take my suggestion with a grain of salt. i would use one of these Eibach Pro Kits. fronts are the same axle load, thus same front spring. rear axle load of the F31awd is 10kg higher than the F33rwd. i would speculate that your rear spring should be for a 1295 axle load. between the choices, the F31awd rear should sit higher than the F33rwd rear. F80 bumpstops fit regardless of spring.

for 440i RWD convertible. rear axle 1290kg
https://eibachshop.com/index.php?p23...-4-convertible

or F31(wagon) 340i x-drive. rear axle 1300kg
https://eibachshop.com/index.php?p24...-bmw-3-touring

personally, i'd probably just go with the F33rwd springs

Thanks very much!

[ranlangdon]

Originally Posted by alohasurftoad

take my suggestion with a grain of salt. i would use one of these Eibach Pro Kits. fronts are the same axle load, thus same front spring. rear axle load of the F31awd is 10kg higher than the F33rwd. i would speculate that your rear spring should be for a 1295 axle load. between the choices, the F31awd rear should sit higher than the F33rwd rear. F80 bumpstops fit regardless of spring.

for 440i RWD convertible. rear axle 1290kg
https://eibachshop.com/index.php?p23...-4-convertible

or F31(wagon) 340i x-drive. rear axle 1300kg
https://eibachshop.com/index.php?p24...-bmw-3-touring

personally, i'd probably just go with the F33rwd springs

I just found the guide for the car in terms of axle load limit (https://www.press.bmwgroup.com/canad...95052EN/443523).

It lists the front and rear axle load limits as 1075kg and 1255kg respectively.

Does your recommendation still stand?

[alohasurftoad]

Originally Posted by ranlangdon

I just found the guide for the car in terms of axle load limit (https://www.press.bmwgroup.com/canad...95052EN/443523).

It lists the front and rear axle load limits as 1075kg and 1255kg respectively.

Does your recommendation still stand?

load limits versus axle load...idk, they are far different and the numbers don't make sense compared to Eibachs. I believe the axle load Eibach lists is the weight over each axle. i just calculated and it cannot be the weight over axle. i'm not sure what exactly it is but i use it in comparing.

personally, i'd still go with F33rwd springs but YOU should definitely research this matter more until you are certain with YOUR choice. i suggest emailing Eibach and see what answers they may offer as well. maybe they'll have different rears you can get ala carte.
.

[ranlangdon]

Originally Posted by alohasurftoad

load limits versus axle load...idk, they are far different and the numbers don't make sense compared to Eibachs. I believe the axle load Eibach lists is the weight over each axle.

personally, i'd still go with F33rwd springs but YOU should definitely research this matter more until you are certain with YOUR choice. i suggest emailing Eibach and see what answers they may offer as well.

Understood. Thanks again for your very useful input! Can't tell you how much I appreciate it.

[cfm56d7b]

Originally Posted by ranlangdon

Understood. Thanks again for your very useful input! Can't tell you how much I appreciate it.

We all appreciate alohasurftoad contributions, both past and especially the futures ones.