MagnaFlow vs Flowmaster vs Straight Pipes

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Iowan

Loud and Proud American!
Joined
Oct 12, 2016
Posts
762
Reaction score
214
Location
Iowa
First Name
Calvin
Truck Year
1999
Truck Model
K1500
Engine Size
350 crate
You really don't want to screw around running propane right now. You're new to all this, just run gasoline you can get anywhere.
Oh I know but I've always been curious about this stuff though.
My Grandpa always said you cant learn too much.
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,092
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
Because it holds moisture and wil ulimately Kill the headers.

Ceramic coating is WIN.


GET SUMM.

9.9 times out of 10, 1.5 inch primaries are better for street trucks than 1&5/8”.

Now what?
Half my fleet runs BB so I guess that's 5 times out of 10 for me.
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,092
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
You really don't want to screw around running propane right now. You're new to all this, just run gasoline you can get anywhere.
Guy can dream..?

Propane in an 11.1 compression BB sound pretty fricken niiice.
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,092
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
13:1 or bust
It would work but some fuckerywork to get there I imagine. Can almost never have too
much valve lift either but that might get seriously compromised with the 'super' dome pistons
needed to get over 12:1.
If valve pockets on domed pistons get too deep could this not have detrimental effects somehow?
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,092
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
I thought big balls was 13.5?
Am I thinkin 12.5???

I'm pretty sure it was 13.5:1



-and header wrap holds moisture....:deal:
No header wrap except for rust...
Anyway while your here... would the heat continually boil off any moisture, leaving everything popcorn fart dry?
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
. would the heat continually boil off any moisture, leaving everything popcorn fart dry?
Yep, as long as you don't shut it off, that's when **** happens, same as getting an engine up to temp and oil still cold and shut it off, valve covers start to rain. :D
 

Encinoman45

Junior Member
Joined
Dec 22, 2017
Posts
21
Reaction score
4
Location
Ohio
First Name
Joe
Truck Year
1987
Truck Model
R10
Engine Size
5.7
I have always had good luck with dynomax. Good sound without being overly loud and no drone. Flowmasters cost too much power.
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Ya. I really like Dynomax mufflers.
I really like Flowmaster too but I don't like 40 series volume anymore. I never heard of a flow "costing power" I think that's laughable.
Delta Flow 50 series.:waytogo:
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,445
Reaction score
28,348
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
I've run across too many dynomax products that were low quality so I have always tried to avoid them. There's usually something better available for just a few dollars more.
 

smoothandlow84

I'd rather be draggin' frame
Joined
Jan 4, 2015
Posts
2,121
Reaction score
790
Location
Arizona
First Name
Steve
Truck Year
1984 Frame...87 motor and 700r trans
Truck Model
1500 r10 pavement scraper
Engine Size
350 TBI
Because it holds moisture and wil ulimately Kill the headers.

Ceramic coating is WIN.


GET SUMM.

9.9 times out of 10, 1.5 inch primaries are better for street trucks than 1&5/8”.

Now what?



Exactamundo! Wrapping headers traps moisture and quickly rots out the metal. Ceramic coating (jet hot) both inside and out is far better than any wrap.
 

smoothandlow84

I'd rather be draggin' frame
Joined
Jan 4, 2015
Posts
2,121
Reaction score
790
Location
Arizona
First Name
Steve
Truck Year
1984 Frame...87 motor and 700r trans
Truck Model
1500 r10 pavement scraper
Engine Size
350 TBI
If you're planning on submerging in the Pennsylvania crud mud, then no matter what you do your headers will rot. Ya better buy in bulk. The clay content will retain the moisture no matter what.
 

Latest posts

Forum statistics

Threads
44,168
Posts
950,774
Members
36,283
Latest member
Cantrell299
Top