Corolla E12 Custom Multi-Link Rear Suspension

[Mech-t]

Hi! well, I'm working in a rear multi-link suspension system for corolla e12 sedan, cause the semi-independent rear suspension is so bored and when we go faster (120km/h ~ 75mph), the back of the car, pull out of the way in the corners......also is so uncomfortable, cause the back of the car chassis, is "floating", so when we turn or accelerate, braking, etc., the chassis have a lateral displacement and into the car, we feel it like a shake shake, cause the chassis tends to twist itself .....in the independent suspension system, we have the advantage that the wheels don't transfer the forces to the other side and the chassis is doesn't floating, opposite to it, the chassis makes the movement and the suspension respond to it.....well I tried to make an introduction.....here we go.....I'm working from oct. 2011, I'm doing it including all the OEM parts that is possible, like wheel hubs and shocks, the Toe-in is around of 2mm, camber will be around of -1.0°~ -1.5°, I'll try to make adjustable, caster I don't know yet, I'm not planning cut the chassis of the car, I'm planning to install it directly in the body....

materials.....

- The arms (control, upper, lower and longitudinal link) are of 1" SAE 1045 and the ends are 1 1/2"

- The suspension body/frame are of HSLA 700MPA with A arms*

- The welding method was the traditional with high energy and it uses at least 7018 welding rods....

- The bushings are of "high impact" silicon compound, the name is funny.....it's only silicon...

The problems....the HSLA drilling process is very difficult, I use normal HSS bits and they died quickly, so I have to use HSS-Co (5% cobalt), are golden and harder than the others...the cut process is so easy/medium, the discs are worn quickly....the HSLA is very elastic, so with heat or great pressures, tends to adapt the form of the heat/pressure source.....i.e. when I tried to drill it, the steel adapt the form of the bit.....¬¬!

There was a measuring problems and the worker makes the holes in the inexact places, so (*) I have to reuse a pair of front suspension lower A arms...

.....When I finish of drill it, this is the result.....

P.S.: The design was made by me and only 2 persons more help me, one to weld and one to make the big drill (into arms end), all the next work I'll have to do too....

P.S. 2: I'll upload more photos as I go forward.....

[scott5]

Hi! well, I'm working in a rear multi-link suspension system for corolla e12 sedan, cause the semi-independent rear suspension is so bored and when we go faster (120km/h ~ 75mph), the back of the car, pull out of the way in the corners......also is so uncomfortable, cause the back of the car chassis, is "floating", so when we turn or accelerate, braking, etc., the chassis have a lateral displacement and into the car, we feel it like a shake shake, cause the chassis tends to twist itself .....in the independent suspension system, we have the advantage that the wheels don't transfer the forces to the other side and the chassis is doesn't floating, opposite to it, the chassis makes the movement and the suspension respond to it.....well I tried to make an introduction.....here we go.....I'm working from oct. 2011, I'm doing it including all the OEM parts that is possible, like wheel hubs and shocks, the Toe-in is around of 2mm, camber will be around of -1.0°~ -1.5°, I'll try to make adjustable, caster I don't know yet, I'm not planning cut the chassis of the car, I'm planning to install it directly in the body....

materials.....

- The arms (control, upper, lower and longitudinal link) are of 1" SAE 1045 and the ends are 1 1/2"

- The suspension body/frame are of HSLA 700MPA with A arms*

- The welding method was the traditional with high energy and it uses at least 7018 welding rods....

- The bushings are of "high impact" silicon compound, the name is funny.....it's only silicon...

The problems....the HSLA drilling process is very difficult, I use normal HSS bits and they died quickly, so I have to use HSS-Co (5% cobalt), are golden and harder than the others...the cut process is so easy/medium, the discs are worn quickly....the HSLA is very elastic, so with heat or great pressures, tends to adapt the form of the heat/pressure source.....i.e. when I tried to drill it, the steel adapt the form of the bit.....¬¬!

There was a measuring problems and the worker makes the holes in the inexact places, so (*) I have to reuse a pair of front suspension lower A arms...

.....When I finish of drill it, this is the result.....

P.S.: The design was made by me and only 2 persons more help me, one to weld and one to make the big drill (into arms end), all the next work I'll have to do too....

P.S. 2: I'll upload more photos as I go forward.....

top man for doing this, keep this up to date. what engine you running any good mods that made you go to this extreme?

thanks scott

[Steven252]

Top marks for effort :thimbsup:

How much will it weigh compared to a standard one? Looking at the pics id say its going to be a fair bit heavier?

[Mech-t]

Hi! well, I'm working in a rear multi-link suspension system for corolla e12 sedan, cause the semi-independent rear suspension is so bored and when we go faster (120km/h ~ 75mph), the back of the car, pull out of the way in the corners......also is so uncomfortable, cause the back of the car chassis, is "floating", so when we turn or accelerate, braking, etc., the chassis have a lateral displacement and into the car, we feel it like a shake shake, cause the chassis tends to twist itself .....in the independent suspension system, we have the advantage that the wheels don't transfer the forces to the other side and the chassis is doesn't floating, opposite to it, the chassis makes the movement and the suspension respond to it.....well I tried to make an introduction.....here we go.....I'm working from oct. 2011, I'm doing it including all the OEM parts that is possible, like wheel hubs and shocks, the Toe-in is around of 2mm, camber will be around of -1.0°~ -1.5°, I'll try to make adjustable, caster I don't know yet, I'm not planning cut the chassis of the car, I'm planning to install it directly in the body....

materials.....

- The arms (control, upper, lower and longitudinal link) are of 1" SAE 1045 and the ends are 1 1/2"

- The suspension body/frame are of HSLA 700MPA with A arms*

- The welding method was the traditional with high energy and it uses at least 7018 welding rods....

- The bushings are of "high impact" silicon compound, the name is funny.....it's only silicon...

The problems....the HSLA drilling process is very difficult, I use normal HSS bits and they died quickly, so I have to use HSS-Co (5% cobalt), are golden and harder than the others...the cut process is so easy/medium, the discs are worn quickly....the HSLA is very elastic, so with heat or great pressures, tends to adapt the form of the heat/pressure source.....i.e. when I tried to drill it, the steel adapt the form of the bit.....¬¬!

There was a measuring problems and the worker makes the holes in the inexact places, so (*) I have to reuse a pair of front suspension lower A arms...

.....When I finish of drill it, this is the result.....

P.S.: The design was made by me and only 2 persons more help me, one to weld and one to make the big drill (into arms end), all the next work I'll have to do too....

P.S. 2: I'll upload more photos as I go forward.....

ubik me top man for doing this, keep this up to date. what engine you running any good mods that made you go to this extreme?

thanks scott

Hi! thanks! I have a corolla with 3zz, 1.6l that I'm planning to upgrade to 1zz crankshaft and pistons with 11:1 compression ratio, I know that I'll have to use 97 octanes gasoline...xD

The engine have Denso Iridium standard plus TRD air and oil filter and a 2 mm delay in the exhaust camshaft, and synthetic Castrol edge 10w60, runs very well, good acceleration, better than 1.8l and even I've won to subaru impreza 2.0R.....

....the plan is lower the vehicle with TRD lowering spring kit, but I had seen that have the kit, but the rear suspension tends to go forward and the space between the chassis and wheel decreases around of 3cm or more.....so I didn't like it....

[Mech-t]

Top marks for effort :thimbsup:

How much will it weigh compared to a standard one? Looking at the pics id say its going to be a fair bit heavier?

Hi! Thanks for post! this one weight around of 40Kgs, complete, with bolts and the longitudinal link that isn't installed yet, in the wheel side I'll have to cut for caliper installation...

[blogsoon]

thanks for all of these .

[blogsoon]

thanks for all of these .

[Mech-t]

Hi! I'm refreshing the post with new info!! at the end, after much work.....

here are the first results.....this is the first try and I'm checking the union points and measures....

....the wheel is so forward, but, I have to fix the crossmember holes.....I'll have to install the shock, but I'll modify the inner support, so it'll have a bushing for both sides....

greetings!