W58 supra gearbox conversion

[cheaterparts]

If the smaller and lighter flywheel and clutch can handle the power, then that's the way to go.

I could probably use a lightened flywheel to reduce some of the weight.

I just grabed a S/H tilton out of the states for $ 160 it was a triple plate I machined the cover so it is now a single plate , going by tilton the single plate is good for 300 ft pound of torque and the good thing only weighs 2.3 Kg total thats plenty for the astron
I might have to go to a twin plate when I up grade 4g61 turbo but the 7 1/4" tiltons and quartermaster clutchs are cheap and always on Ebay state side
I have a 4 1/2" AP racing triple plate sitting here but they just look to small they of cause have a high enough torque rating for anything our IPRA turbo cars could produce

[MrBishi]

yeah thats what I thought. And the 2.6 flywheel is even bigger then the 2.0 flywheel from memory

same dia and ring gear dia just fatter and to heavy

It's a bit of a moot point, but the 88/89 2.6 starions run a bigger diameter clutch than normal so in theory should hold more HP than normal 2L/2.6L starions. Flywheel diameter is the same.

What do you do to the tilton clutch plates to make them suit your input spline on gearbox? I assume the cheaper ones would mostly suit 'agricultural' coarse splines common to old school US gearboxes.

[cheaterparts]

What do you do to the tilton clutch plates to make them suit your input spline on gearbox? I assume the cheaper ones would mostly suit 'agricultural' coarse splines common to old school US gearboxes.

as most of these come out of Nascar they are suited to common boxs such as jerico
most these days are for 29 spline a lot have 26 spiline and a few although are getting a bit rare are 10 spline
new plates are avalable in 23 spline old school chrysler US that fit starion
but I just change the centre ,there are only 6 rivots in the centre
and as a matter of interest there is enough material in an old 23 spline from sigma/scorp/starion fiction plate centre to machine one to fit an tilton plate

the one on the left is a std 26 spline and the one on the right has a machined sigma centre - note I still have to fit 3 more rivots


I had thought about using this clutch this is ment to handle over 600 ft pound and are used in indy cars an AP Racing 4 1/2"
making the flywheel is a bit different as the fiction plate next to the flywheel runs over the flywheel bolts the fiction plates measure 115 mm od and about 70 mm id

[thrash]

P.S. I wonder how they compare on weight as I know the Mazda stuff is designed with weight in mind on the RX7

http://autospeed.com.au/cms/title_Gearb ... ticle.html

w5x series gearboxes weigh about 35kg according to autospeed.. how much do the rx7 boxes weigh?

sorry to dig up this old thread, but was just researching this a bit.

[enthuzed]

Just for interest sake, the standard Starion flywheel weighs about 8 - 8.5kgs.

[thrash]

on a side note, for those who have actually completed this conversion, what's involved in getting the gearbox to work with the starion speedo and odo?

[thrash]

i guess nobody who has done this conversion frequents the forums eh..

either that or nobody figured out how to get the speedo working :S

[MR Bender]

you need a 90 bend extension from the where the speedo cable comes out of the box to the cable. i will try and get a pic when i jack it up to fix the diff.

[MrBishi]

The starion speedo cable goes straight onto the supra. From memory the speedo drive is on the opposite side, so the cable may be a bit short hence the 90 degree drive bender mentions.
On my old Lancer the speedo cable went straight onto the supra without any angle drives or shit.

Ratios however may need attention. There are plenty of different speedo gears to suit the toyo boxes, but its almost suck it and see.

[greenstaz82]

got supra 58 in mine starion speedo screws straight in , but obviously doesnt read right , but i can live with that lol

[iXNAY]

you need a 90 bend extension from the where the speedo cable comes out of the box to the cable. i will try and get a pic when i jack it up to fix the diff.

were do u buy this said 90 degree bend?

[redzone]

i know holden piazzas have a 90 degree angle drive on the speedo drive, but good luck finding one! i have one but i'm keeping it for a future project.

[thrash]

i have never ever in my life seen a real piazza..... heard about em.. read about em.. never actually seen one.

[redzone]

a mate of mine who wrecks gemini's and sends the parts all over australia and even overseas, has wrecked about 8 of em, and has kept the nicest aussie spec and even has a jap spec twin cam one. i used to want one for shits and giggles, but they really are a difficult car to work on, and unreliable. anyone who calls a starion unreliable and costly to own needs to have a reality check and be forced to drive a piazza for a year.

ps the front LH spring from a piazza nearly killed me once. they're super heavy, and it broke my spring compressor while i was working on it, and the spring shot past my head at a million miles per hour..

[MR Bender]