What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

For the first time in 3 years... (Now Exhaust Tech)

Russell

Russell

3/4 ton status
GMOTM Winner
Joined
Jun 23, 2000
Posts
8,493
Reaction score
1,935
Location
Rocky View County, AB
My truck runs properly!! Finally got a rod / jet combination that gets my truck running properly!

Now, to replace the clutch master / slave, fix the e-brake, lift the rear, and get some exhaust put on :doah:

Maybe I'll get to drive it someday :haha:
 
Can anyone give me some suggestions for exhaust?

The truck has a mildly built 350 in it (XE262H comp cam, TBI swirlport heads, stock intake and a q-jet, reasonably high compression) which is built entirely for torque, not for horsepower at all. The cam is rated from 1800 - 5000 RPM, the heads make torque from 800 - 5000 rpm, intake is rated slightly less, and the carb 650 CFM or so. It will never see more than 5000 rpm, ever. When all is said and done, it will have an NV4500 with the 350.

I was thinking of just going with a 3.5" single tube down the driver's side of the truck, exiting behind the driver's side wheel at 45 degrees or so. No fancy tip or whatever.

What I need suggestions for more than anything is what muffler to use. I want something that is quiet at an idle and while crusing, but has a nice deep rumble when I get in it. I don't want exhaust that has a brapping or tinny sound to it, just deep and mellow.
 
How badly would my truck flow with a 2.5" pipe? Would it really choke my engine out?

I already have a 2.5" pipe that runs from just behind the cab through one of my old flo-pro mufflers and out behind the rear wheel at 45 degrees.

If it is too small, I'll probally just wind up with a 3" exhaust setup front to rear with a flowmaster 50 series delta flow.
 
I doubt you'd *notice* much difference with single 2.5", but single 3" is the way to go if you can, IMO. Better safe than sorry, right? 3.5" is probably way overkill with that engine.

Cost gets pretty bad when you go over 3" diameter pipe too doesn't it?

Adding this in: exhaust is a science, there is not going to be one setup that is optimal for every engine out there.

Have fun reading! :)
http://www.popularhotrodding.com/enginemasters/articles/hardcore/0505em_exh/index.html

I found this article very interesting. IIRC, he talks about smaller diameter exhaust further back, and smaller diameter exhaust should help keep in-cab noise levels down. I'd love to play around with this if I had the facilities.
 
Last edited:
I just did some quick figures and here are the areas of some of the options:

single 2.5" = 4.9sq" - puny. it's what I'm currently stuck with
dual 2" = 6.28sq" - better, but it costs more and is a pain to route
single 3" = 7sq" - breathes well, can run stock or near-stock routing
single 3.5" = 9.62sq" - expensive, breathes too well for smallblock

as mentioned before, single 3" is a good option.
 
Well, I went and had a chat with my exhaust guy, custom building a 3" setup with a 2.5" y-pipe will set me back approx 500 bucks, which is about what I was expecting.

I'll probally get it done later on this year, shortly after christmas
 
That seems kind of high, have you checked out summit or jegs? I thought they had kits for $200 or so? Obviously that doesn't include welding or installation, but still, $500 seems high, especially with your vastly superior dollar! :)
 
dyeager535 said:
That seems kind of high, have you checked out summit or jegs? I thought they had kits for $200 or so? Obviously that doesn't include welding or installation, but still, $500 seems high, especially with your vastly superior dollar! :)
Click to expand...

It isn't that our dollar is high so much as yours is really low... Everything here in Canada costs approx double of what it would down in the states as far as parts and accessories go, even stuff that is made in the USA. Sucks, but that is how it is. That is also a fully custom built exhaust setup from a local mom & pop's shop, so it will be a bit higher by nature, but I would rather not take it to some big exhaust shop, they typically do really crappy work...

I am able to weld exhaust piping no problem, but I know I couldn't do nearly as nice of a job with that summit exhaust as a shop can. I don't plan on taking this exhaust out any time soon. I am also considering putting in a high flow cat as well.
 
If that's mandrel bent that's not bad at all really.
 
If that's just crimp bending or with the shallow depressions at the bend then that's sorta high. Well, it is here but since most of the materials are probably made in Canada anyways I'd expect the work and materials necessary to cost the similar prices.


Then again I live in an area where asking about mandrel bends gets you a confused look like you just started speaking in Klingon. I miss SoCal sometimes...
 
You must log in or register to reply here.

Latest Posts

Top Bottom