RotaryEvolution

iTrader: (30)

i'm still not sure whether a copper gasket will survive in the manifold or mating to the block but i figured it is worth a shot since i know they hold up quite well in high HP V8 engines but i haven't seen it brought up yet. we all know the stock gaskets are grossly overpriced so i am going to test one out and see how well they hold up but my question is has anyone tried making their own copper turbo exhaust gaskets and how well did they hold up? the only concern i have is whether they will warp under the high heat of the turbo or wear and blow out due to "itching" between the cast iron surfaces.

i will get some pics later since i am not at the shop.

rotorforce

Funny you should ask that, I started a thread earlier about the guy who used to sell them on ebay. He dropped off the planet for some reason, but he made the coolest FC parts like the fuel rails and turbo gasket I have pics of in my thread.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/whatever-happened-guy-509698/

rotorforce

here it is

RotaryEvolution

iTrader: (30)

interesting, i thought i heard of someone making them but i couldn't find any info on them or how well they worked.

rotorforce

I have yet to install it, but the good news is I still have this guys contact info, and I will be sending him a letter to see if he has any left and if he will be selling again. If not, perhaps I can buy what he has left and distribute them to anyone who wants them at the same cost I pay for them + s&h.

tonybcrazy

I just reffered to an reference and the melting point depending on alloy is 1500-2000 F so I wouldn't expect it to hold up to long.

unW7WZ

Keep us posted on if he's still making them or the fuel rails. The fuel rails on the previous thread are nice.

BLUE TII

iTrader: (9)

I have been using thick copper gaskets for my S5 turbo to manifold and turbo to downpipe as the runners are too big for stock gaskets now.

I have ~13,000 miles on one of the gaskets and re used it 4 times and it looks the same every time.

Only problem I had was the nuts wanting to back off because of the high rate of expansion of the copper. I double nutted the studs and no more problems.

I stacked 2 VERY thin copper gaskets between the turbo and backplate and they held up fin for the ~2,000 miles they were on as well.

iceblue

Make sure you use a thick one! We made several a month of 20 and 22GA and these melted often. This was on a GST

NZConvertible

Same here. When I had a custom turbo backplate laser-cut for my divided DP they cut out a matching copper gasket. It was only 1mm thick and over a period of ~18 months I watched it slowly get squeezed out from between the turbo and DP at several points. Eventually it started to leak and when I took the DP off the gasket came away in three large crumbly chunks and a few more smaller pieces!

Cosmo_TT

iTrader: (11)

i say you still try it ben i need it and remember 2 1/2"ID