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Location:
Canada
Registered:
September 2002
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 Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 03:12
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Hey all!
I know there are both big brains and big egos in this forum, so I'll pick one and pick on the other lol.
I run my MkI Celica Supra, MA47, 5ME (getting boosted) A40D trans, F303 LSD, 4 disks, and an attitude.
But it's not tunable enough, suspension wise!
I'm looking to upgrade the front suspension design to reflect the 20 years of engineering that have happened from inception to the present, and the best I can find is the MkIV Supra!
However, the problems represented here include such things as;
-single control arm/ strut vs. dual control arm
-engineering data availability on MA47 frame rail support of latteral loading if add upper control arm
-ride height engineering to maintain steering axis
-availability of MkIV engineering data on location (relative) and axis (plural) in order to properly graft the extra components....
you can see where this is going!
If I wanted to add *something* to the outer end of the MkI control arm, in order to upgrade the hub and brakes as well as spring and shock, got any better suggestions?
Current plan is this;
-source front-cut or replacement used parts, MkIV, balljoint with lower control arm, hub, rotor, caliper, balljoint with upper control arm
-locate and plan addition of upper control arm locations on the MkI frame
-graft lower balljoint section of MkIV lower arm to existing MkI lower arm (with strut rod)
-possible: make "slotted" or other adjustable upper mounts for primary camber settings
Anyone? Anyone? Bueller....?
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Location:
Brisbane
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 03:30
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Upgrading your McPherson strut suspension to double wishbone suspension will require pretty much building a new car forward of the firewall. If all you want is more adjustability, this isn't the way to do it! McPherson strut suspension can be plenty adjustable with the right mods - just look at what the AE86 boys get up to, everything they do applies to you as well. Get some coilovers and an adjustable swaybar and you're most of the way there already!
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Location:
Canada
Registered:
September 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 03:52
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thanks for da reply Norbie!
"adjustability" might be too soft a word. I need to be able to make this car dance.
I have a spring rate and right height I want, but camber is an issue now.
Urethane bushings helped but there is still too much force-related lateral motion in it.
The current swaybar is the 22mm one, and I have 3 different durometers of puck to go in steps from soft to hard
There is little room for slotting the current spring dia., and have you priced "pillowball" type upper mounts lately?
The shock is set valve, but still being hydraulic, I can easy change the action with oil weights/viscosity types.
I've never been one for "plug and play" solutions - I find they are far too average. this car is being built as almost a purpose-track-racer with plates, since I care not for comfort or convenience, just performance (wel, i put a stereo in lol)
I know the VW Golf III kits will fit both thread collars and inserts, providing I shorten the strut tube, but I was looking for ideas relating to adapting a more advanced suspension system into the car
ALSO - the other main point is to bring in a modern BP/offset with big brakes!!!!!
a set of stock MkIV supra wheels (17") with the STOCK TT rotors/calipers would be such a huge improvement!
If I just use "tricks" to make my current setup ... better ... then I still have the 4x114 BP, and a huge RWD set to the wheels! If I change the hub and move the bolt-face further out, I get the offset to current (+30-ish) as well as the brake bonus.
Then I only run "adapters" to get the rear wheels to fit...
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 04:48
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Keep it simple - coilovers with decent adjustable shockers and a camber kit. Norbie hit the nail on the head.
Talk to Allan about a brake upgrade - he is running a G series Hilux LSD with 291 mm ventilated rears. However, he is a cheap fucker, so he is being tres ghey and keeping the standard size front rotors and calipers till he has finished playing with the bargey MA70. We looked at some 320mm rotors from something non Toyota and thought they might work.
Funnily enough he is also running a 5ME (soon to be boosted) on BBQ gas.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 22:07
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| gianttomato wrote on Fri, 12 December 2003 15:48 |
... Funnily enough he is also running a 5ME (soon to be boosted) on BBQ gas.
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Does that mean, next time when I see Allan's his MA45 powered 5M-TE. I need to bring sausages as well? 
Keep me posted on what is going on as my MA61 needs some stiffing at the front 
Cheers.
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Location:
Melbourne
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Fri, 12 December 2003 23:58
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| gianttomato wrote on Fri, 12 December 2003 15:48 |
Funnily enough he is also running a 5ME (soon to be boosted) on BBQ gas.
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No gas dave just efi... unless it runs like a dog on the 5m-e ecu!
Back to the topic, IF YOU DARE HACK THAT MA47 I WILL GET ON A PLANE AND BASH YOU TO A PULP WITH THE REMOVED STRUT!
do it with an ra40 celica not a rare ma47! box in the lower control arm to stop that flexing and get adjustable strut tops!
Allan
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Location:
Canada
Registered:
September 2002
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 Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Sat, 13 December 2003 00:37
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[quote title=Allan wrote on Fri, 12 December 2003 18:58
Back to the topic, IF YOU DARE HACK THAT MA47 I WILL GET ON A PLANE AND BASH YOU TO A PULP WITH THE REMOVED STRUT!
do it with an ra40 celica not a rare ma47! box in the lower control arm to stop that flexing and get adjustable strut tops!
Allan
[/quote]
oh ye Gods I'm crying I'm laughing so hard....
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Location:
Canada
Registered:
September 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Sat, 13 December 2003 00:43
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OK - I think to *point* got lost.
I NEED TO UPGRADE WHEELBASE AND BRAKES TO SOMETHING I CAN FIT REAL WHEELS TO
This BP/offset stock is Kimpossible to get rims for, and 14x7 is nice, flat, good sidewal ratio, and IMPOSSIBLE TO BUY REAL TIRES FOR OVER HERE>
sry fer tha caps
the upgradde to a modern-er hub/rotor insited the overall upgrade idea, and I'm looking fro something I can fit pre-built adjustables into etc. Options are ... ZERO afaik for bolt-in, so the concept of welding a different end with BJ onto the lower strut came up adn I'm going from there....
I've spent 4 years managing to *not* hack up the '47... the most hacked it should get is to install a good safety cage and maybe change the spring perches in the rear for racing spring ones (for better selection)
BTW - I *can't* to this to any other Celica... I don't OWN any other Celicas.
Matter of fack; since I got robbed I don't seem to own much of anything at all. And I'm low-paid so I'm working on a make-it-yourself budjet all the time anyway.
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Location:
Melbourne
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Sat, 13 December 2003 02:30
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| FreaK wrote on Sat, 13 December 2003 11:43 |
And I'm low-paid so I'm working on a make-it-yourself budjet all the time anyway.
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Go 5 stud, wide choice of cheap wheels available! and then a hi-lux diff (You should be able to get a decent price for your F series disc brake rear end) and run MA70 brakes front and rear and use common Ford wheels on the car (thats my plan anyway)
Allan
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Location:
Brisbane
Registered:
May 2002
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Re: Front suspension Conversion!! MkI Supra to MkIV - ideas?
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Sat, 13 December 2003 02:34
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Yeah, if you follow the MA61 5-stud/brake upgrade discussions happening on this forum you'll find that most of it applies to your MA47 as well. Big brakes and a wide choice of wheels, there's some more of your criteria taken care of!
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