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After my turbo conversion, I am having trouble with my 'Heavy Duty' RPM clutch not handling the power. It tends to slip in 3rd and 4th gear at about 4000 RPM and up. I am wondering if a Starion/Conquest clutch may fit, such as the one on ebay here:

http://www.ebay.com.au/itm/AUTOCOM-Stag ... 90e&_uhb=1

Also would this later allow for an RX7 gearbox upgrade? I have a feeling that once the clutch stops slipping I will have trouble with the rest of the drivetrain.

Also I am on the hunt for the holy B2600 bellhousing. It would be excellent if someone has one in tasmania.

When I had the boost up a notch I was also getting clutch slip in 4th going up my favourite hill. Now that I am back to standard boost ..no more issues.
I have a stock pressure plate with 30% more clamping pressure + Starion turbo clutch plate.

That looks like amazing value..even with posting from the US

Just be careful, the US Starions have 2 different sizes of clutches and pressure plates for their wide block 4G54's. I found out the hard way after purchasing 2 of them.

As for the gearbox, how much torque and where is it in the RPM range?

The Starion or Triton gearbox will be much stronger than either a BW or the Sigma/Scorp Jap 5 speed and will bolt straight on.

Depending on your budget NPC Clutches in Brisbane do a clutch/lightened flywheel package which will hold. (My brother's business makes the flywheels and their multi-plate clutches)

Here is the link to the specs.

Cheers.

Does the Station/Triton g/box have the same ratios as the jap 5 speed in the Sigma????

Thanks for all the suggestions!

I'd love to figure out which year US G54Bs have compatible flywheels.

I think the problem I have been having is oil leaking into the clutch from the sump. Hopefully I can get that fixed and the clutch will recover/dry out.

It's easier for me to get an RX7 box than a Triton/Starion one. I just need to find the B2600 bellhousing!

Scorpma82 wrote:Does the Station/Triton g/box have the same ratios as the jap 5 speed in the Sigma????

Starion and jap 5 speed have the same ratios but the staz has taper rollers on the lay shaft and wider gears to handle more torque

Getting closer the getting the Sigma back on the road and I remeber that last time I drove it I was playing with an EBC and the clutch was slipping up steep hills in 4th everywhere. I think I need to dive in and take the risk. With the two different type starion clutches, where is the difference? Is there a measurement I can get the seller to make? Could a little machining do away with the problem?

I've done a little bit of research and there appear to be 2 different diameters and every other property is the same. The two diameters are

Disc Outer Diameter: 9 7/16" = 239.7125 millimeters
Disc Outer Diameter: 8 13/16" = 223.8375 millimeters

This is actually a triton 4g64 flywheel but it's the same


So to cut a long story short, this is the one!

http://www.ebay.com.au/itm/AUTOCOM-Stag ... 53f18e79f5

Seller cancelled the order about 10 days after I made it. Was expecting to be receiving the item not a refund. If he let me know sooner I would definitely be a lot less pissed than I am now.

I'm looking at this http://www.ebay.com.au/itm/EXEDY-HEAVY- ... 106423872? as it is in Australia, but I'm scared I'm just going to end up with a slipping clutch all over again.

NPC has quoted me $998 including GST for a flywheel and organic clutch. Apparently the use a 10" gtr sized clutch as the factory unit is just nowhere near large enough to work well without a button type clutch and horrible pedal feel. I think this is unfortunately a bit excessive for my budget at this point in time. (I don't think the motor even owes me that much!)