Toyspeed.org.nz Message Board

by **deaf_rattle** » Mon Oct 05, 2009 9:04 pm

looking at going 3" exhaust on the heap.
Is flexi joint recommended? or not really needed?

Cheers

by **THA SHZ** » Mon Oct 05, 2009 9:25 pm

best to too take up some flex in the exhaust system , otherwise you may tend to crack the exhaust abit

OMG so shiny! · by **Dell'Orto** » Mon Oct 05, 2009 10:28 pm

Its not so critical, as you dont get the forward-backward rock like you do in FWD, the side to side rock in north south motors gets taken mostly by the rubber hangers.

by **l1ttle_d3vil** » Mon Oct 05, 2009 10:44 pm

my dump pipe (in a rwd) has just cracked.

couple of people have now recommended either bracing it with a bracket to the engine and/or fitting a flexi to prevent it happening again.

by **Flannelman** » Tue Oct 06, 2009 11:43 am

Flexi is your friend! Get one and the exhaust wont crack over time

by **Quint** » Tue Oct 06, 2009 12:22 pm

l1ttle_d3vil wrote:my dump pipe (in a rwd) has just cracked.

couple of people have now recommended either bracing it with a bracket to the engine and/or fitting a flexi to prevent it happening again.

I've fixed mine to the engine via a bracket to the bellhousing and have a flexi joint just after.
Its easier to include it at first, rather than have it crack then trying to locate where the exhuast is leaking and fixing etc.

For the price of a flexi, its well worth it.

by **YeMs** » Tue Oct 06, 2009 12:30 pm

definately worth it! if you need a good price on a 3" flexi let me know.

by **Adoom** » Tue Oct 06, 2009 9:01 pm

Quint wrote:
I've fixed mine to the engine via a bracket to the bellhousing and have a flexi joint just after.
.

I braced my downpipe to the bellhousing, cause the weight of the turbo and exhaust was pulling the studs out of the head! After doing that, I had no problems. A flexi would be good, but with a 2.5" exhaust, they're kinda expensive....

Py7h0n's big cleanout · by **Py7h0n** » Wed Oct 07, 2009 10:21 am

I run a 3.5" so can't get a flexi - Bolting the exhaust to the gearbox mount and bellhosing seems to have worked really well though

by **Malcolm** » Wed Oct 07, 2009 3:39 pm

you can get flex joints larger than 3", think truck exhausts.

I'd think a flex joint is a good idea just to be safe, but as mentioned by others - make sure your downpipe is braced to the engine too. I do actually wonder how effective those flex joints are for a RWD - in a FWD you're bending the tube, which is how the joints are designed to deform; in a RWD you're twisting it, and I'm not sure how much (if at all) those joints can twist.

Py7h0n's big cleanout · by **Py7h0n** » Fri Oct 09, 2009 8:12 am

Yeah you can get 4" ones... 3.5" is just an odd size

Malcolm wrote:you can get flex joints larger than 3", think truck exhausts.

I'd think a flex joint is a good idea just to be safe, but as mentioned by others - make sure your downpipe is braced to the engine too. I do actually wonder how effective those flex joints are for a RWD - in a FWD you're bending the tube, which is how the joints are designed to deform; in a RWD you're twisting it, and I'm not sure how much (if at all) those joints can twist.

by **AE86fan** » Fri Oct 09, 2009 8:34 am

I have had heaps of issues with the manifold and nuts and studs coming loose from where the turbo mounts (RWD). I have put it down to no flexi as the vibration from the engine is trying to shack the whole exhaust system, the weak point in the link is those nuts and studs. Thats my theory anyway??

by **evil_si** » Fri Oct 09, 2009 8:41 am

Py7h0n wrote:I run a 3.5" so can't get a flexi - Bolting the exhaust to the gearbox mount and bellhosing seems to have worked really well though

i can supply a new stainless woven flexi 3.5" x 250mm long looking at $104

Toyspeed.org.nz Message Board

flexi joint required? rwd?

flexi joint required? rwd?

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