just put duals on my 1973 new yorker
- Thread starter ukfanalways
- Start date
ukfanalways
New Member
ukfanalways
New Member
Nice work!!!
Mr C
Senior Member
Nice. Don't forget the turn down ends.
bulldogchesty
Senior Member
Very nice work.
mrfury68
Senior Member
Good job. That big block will breathe so much easier. You will notice the improvement. As Mr. C said, don't forget the turn down ends.
MoPar Maniac
Well-Known Member
Heat riser in the manifold.
What is that's purpose? I've never heard of such a thing, so that's what the knob on my car is. I was wondering about it, I kept seeing it thinking it was a clamp tightening or loosening device where the manifold joins the pipe
When engine is cold, it blocks exhaust so exhaust gas must go thru intake manifold crossover and exit otherside exhaust manifold.
MoPar Maniac
Well-Known Member
The crossover in the intake aids in heatingbthe carb for better driveability during engine warmup.
What purpose does that serve? So it is heat activated I assume? As the manifold gets warmer it opens?
Ahhh I see, wow. Pretty awesome engineering there. Thanks for the knowledge!
Yes, it opens when engine warms up.
SeaFuse
Active Member
Slightly related, a good economical muffler are the Summit stamped turbos (not welded). Very low cost and don't sound like tinny Flowmasters. But best reason is that they flow very high CFM and build a little more power than the competition that's a lot more expensive. At least this is what I've read. Personal experience is that they do not sound obnoxious.
When I had my new dual exhaust done on my car last year the fabricator told me the heat riser was STUCK SHUT for god knows how many years. Between the larger exhaust pipe diameter ,,mufflers and the now open heat riser I noticed a very nice improvement.
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SeaFuse
Active Member
A cross over pipe helps low end torque a bit and also helps keep noise down.
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