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nissan
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Discussion Starter · #1 ·
hi all have sd33 non turbo 81 mq with soft top closed no proplem but with windows or rear roll up open get bad smell could this be from the brether looking thing on side of sump and if so can i extend this to send bad smells away summer is coming for us over here and would like to take roof of with out killing all on board!!!!!!!
 

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KICKEN BACK IN THE BUSH
nissan gq
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Bad smell with the rear open you say ???
Hows the exhaust exit on the car ???
 

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The Prodigal Child Has Returned
nissan
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I vote exhaust.
Exhaust swirls round and get sucked in the back due to vortex motion. Used to do it when i had the back window open on the wagon
 

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nissan
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Discussion Starter · #5 ·
so any cure s down turned tail pipe ? was thinking of twin exit but that would only serve to make things worse
 

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nothing seems to help from my experience. ive been in a few cars with different exhaust config and they all smelt;
- my car had the exhaust cut at the transfer
- mates v8 was twin exhaust cut at the diff
- he then extended the twins right out the back, didnt help
- what looked like stock sd33 exhaust had pointing down tip behind wheel.
you could speak to an exhaust shop, see what they recommend. you could try side-pipes, blowing to the side just before the rear wheels. this might get the exhaust into a different air stream that wont swirl around back into the car.
 
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