Flexplate mod question

[scrwright]

I am joining non standard engine & auto gearbox, adaptor plate is sorted, flexplate is next.

I am struggling to find a flex plate for the engine I am using I can use with my torque convertor, factory ones are full of holes where I need to drill for my torque convertor. Flex plate for the gearbox is 6 crank bolt hole where the new engine is 8.

2 questions, anyone know a company that can make up flexplates? If not, is it safe to overlay/weld on the centre part of the flex plate and redrill to suit the 8 bolt crank (IYSWIM)? I am doing none of the work, will find a suitable engineering company to do any mods if required.

Ta

[stevieturbo]

Why not state what it is for ?

Flex plates do generally seem to be thin pieces of crap, so I cant see any issue with the weld it up and drill new holes process. I've even seen some flex plates with bits already welded as you describe, although seems it's just for strength rather than a different PCD.

TTV in the UK make custom flywheels...so cant imagine a flex plate being too difficult for them

[Krikkit]

Someone like Ashcroft could do one cheaply enough for you I'm sure.

If not any engineering shop with a laser cutter would get it done no problem.

[scrwright]

is to mount a Honda j series to a eunos auto box. Using the mazda flex plate would be much easier

[stevieturbo]

As it's a low power build etc...I'd just go with the welding option with the Mazda flex plate

[eliot]

Make sure any welded additions are even otherwise it could vibrate.

[Steve_D]

stevieturbo said:

As it's a low power build etc...I'd just go with the welding option with the Mazda flex plate

This would seem the best option.
In addition do you not have to thicken the flex plate in some way to compensate for the thickness of the adaptor plate?

Steve

[scrwright]

yes (10mm), but I can weld a spacer to the engine side of the flexplate and sandwich the plate between 2 plates with the correct pcd and weld them up. Mazda flex plates have been run to in excess of 250bhp on turbo motors, mine will be about 220bhp n/a so they should cope.