Now that you mention it, I have an old Chevy gas-burner with stacks.

My 14 year old son still carrys the brand on his arm from touching one of the stacks when he was two years old.

On my diesels, I can drive hard for thousands of miles and still hold my bare hand on the stack for minutes without getting burnt.

Why do diesels have to monitor EGT for fear of melting something and gassers never seem to worry??

It would seem to me that they would be in much more danger of burning through a piston.

 

Primarily because of the turbocharger but also because the pistons must withstand much higher pressures and constant detonation. The turbo also reduces the temperature of the exhaust considerably.

Edwin

 

Actually, diesel combustiion temp are much higher than gassers (unless they go severely lean like loosing fuel pressure during a nitrous blast or pump too much nitro which has o2 in the molecule). Gasoline burns much more slowly than K2, and up to 40% of gasoline is stull burning as it comes out of the exhaust port. That's why they inject air into the exhaust so the cat can burn the leftover .

Diesel burns how and fast, and most of it is consumed during the power stroke.

 

one simple add-on question...(I hope)...

I keep seeing that the factory downpipe is 3"...

I'm getting ready to get some adapters so I can run my stacks...

I see adapters for 3" ID and 3" OD...when everybody says the OEM downpipe is 3", is that ID or OD?

Greg

 

Mine is 3" OD.

Pipe is measured ID and tubing is measured OD.

 

so is exhaust considered pipe or tube? cause if you go here:

http://store.airflo.com/exhaust-tubing.html

it's called Exhaust Tubing, but all the flex stuff is measured ID...


I always hear the term "exhaust pipe", but I'm sure that's just a common term...

I was a little confused because you can buy:

3" ID to 4" OD
3" OD to 4" ID
3" ID to 4" ID
3" OD to 4" OD


all four combos of 3"/4" ID/OD...

I guess I'll actually measure mine, and then check to see if my stacks are 5" ID or OD (they were a "toss in" with the deal when I bought it last weekend, so I'm not sure)...then see what kind of 4" I can find...

Thanks.
Greg

 

I don't know, but I'll bet it's rollin out some pretty serious smoke by the looks of that avatar! You're pourin it on alot harder than mine does. Maybe once I get some pocket change, I'll change that.

 

the ID measurement means that it's flared to go over straight pipe, and the OD measurement means that it'll go into a flared end (ID). Your downpipe should be OD. I had that problem when I put mine together, too. I got it all ordered correctly from airflo, except for 1 adapter. Had to wait another week before I got to put it all on.

One other thing... have a sawzall and 6" blades and an angle grinder w/ cutoff wheels handy for getting that old pipe cut off. Those old slip joints are pretty much froze together, but if you cut slots along the length of the joint (only through the outer pipe!), then take a chisel or junk screw driver and hammer on it (kinda like peeling a banana) they usually come apart. PB Blaster might come in handy, too. (PB is awesome penetrating oil)

When cutting the hole in the bed for the stack, the sawzall will come in handy when cutting through the bed braces if you run into any. I had a 4 1/2" hole saw that tried to rip my arm off, thanks to that big Milwaukee drill I borrowed from dad! After I went through the bed floor, I pried that circle out and went w/ the sawzall.