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if you asked the sales person about it prior to purchase and they said would be ok, they're liable. :)

acid won't do shit if it's rinsed off shortly after.

might just be a mighty mods publicity stunt...

Thermodynamics does not cover exhaust pulsations, and will not teach you how to design a decent exhaust manifold. I can recommend you a few books if you're interested. The test is proving something that is commonly accepted/known. Split pulse manifolds have been around for a long time. With...

boy, i think you need to speak to an engineer. Exhaust pulses in log manifold would interfere with each other at high rpm with that design, to the extent that the direction it's pointing to is completely wrong!!!!!!!!! it's going horizontally, not vertically!!!!! Would be less lag, but top end...

i heard mixed reviews on KU engineering manifolds. They any good?

just fabricate some. stop being soft boy!

you could put it on the underside of the stock shield as you've said. it's not that thick.

how the fuk do you class a sports car as a green car? that's just crap. there was a lambo in the city today that half deafened me when it went past. could hear it many many blocks away driving around the city too. bullshit that car's green. half these euro cars have valves in the mufflers...

they can pick a punched cat by doing an emissions test. there are plenty of race cats on the market, even in 4" - not cheap, but not as much as a fine.

how do you plan on doing that? I don't imagine it's possible to do properly without scanning the car?

Ku31's ftw. Awesome street tyres.

haha, true. but is also a design thing. so yeah, lighter is better. was way overweight last time, so cutting everywhere. Titanium, Cept that's expensive, hard to aquire and nobody wants to bend it. One shop in sydney's done an exhaust with it before, cept they wont have material for 2 months...

seems that carbon fibre is only good for up to 320 deg c, so is no good for a system.

thought about it. haven't seen it done as a whole system though, so dicey about it :P Has it been done for anything other than mufflers?

Go kart, R6 engine. Only flanges will be on the headers, the pipe work will try to be flared tubes with clamps. Length has been chosen for good power band.

Headers + primaries + secondaries alone at 8000kg/m^3 which is pretty much density of all steel = >6kg in 1.6. Already done the calcs. Only needs to be 0.7-1.0mm. 1.2mm wall isn't all too easy to come by either, so may as well try and find better/lighter. 1.2 will be used if is no alternatives...

thin = light. Can't seem to find stainless or mild in anything smaller than 1.2mm wall, and even then it's scarce. Is pretty much for a kart, so weight is a huge factor. A 1.6mm wall exhaust will be about 6kg, 0.9 would be under 3 I think, roughly.

Hey guys, Just wondering if anybody has ever seen an exhaust made out of 4130 chromoly steel before? Looking to use it for headers and an exhaust, but concerned about if it goes brittle and such, if it needs to be braced, etc. Is not for a road car, is basically only being chosen as it's the...

WHAT!?! you bought that too!?!?! holy shit! you got 2 crazy ass cars now! (unless there's more? :P)