EFI Exhaust...Again
Thread Starter
|
New User
Joined: Apr 2010
Posts: 5
Likes: 0
EFI Exhaust...Again
Hi all,
Been lurking for a while for tips on improving the performance of my newly acquired '88 F150 4.9L 5-speed. The truck is still wearing what appears to be its original cats and O2 sensor. I'd like to follow AbandonedBronco's lead. The only problem is I need a cat w/ air tube. Does anyone know of a single, good flowing cat w/2.5" inlet/outlet and the AIR tube?
Also, has anyone tried a glasspack (CherryBomb). They seem like stupid fun and are cheap, but I am not looking for blatant obnoxious noise.
AbandonedBronco's Exhaust:
Converter Pipe (Manifolds to Cat): Walker 45166
2.5" in/out Catalytic converter: Walker 15038 (part # with AIR tube?)
2.5" in/out Dynomax turbo muffler: Walker 17788
2.5" Bronco mandrel bend tailpipe: Walker 45569 (will of course use different or dump in front of rear tire)
Thanks in advance for any help offered.
ottocycle
Been lurking for a while for tips on improving the performance of my newly acquired '88 F150 4.9L 5-speed. The truck is still wearing what appears to be its original cats and O2 sensor. I'd like to follow AbandonedBronco's lead. The only problem is I need a cat w/ air tube. Does anyone know of a single, good flowing cat w/2.5" inlet/outlet and the AIR tube?
Also, has anyone tried a glasspack (CherryBomb). They seem like stupid fun and are cheap, but I am not looking for blatant obnoxious noise.
AbandonedBronco's Exhaust:
Converter Pipe (Manifolds to Cat): Walker 45166
2.5" in/out Catalytic converter: Walker 15038 (part # with AIR tube?)
2.5" in/out Dynomax turbo muffler: Walker 17788
2.5" Bronco mandrel bend tailpipe: Walker 45569 (will of course use different or dump in front of rear tire)
Thanks in advance for any help offered.
ottocycle
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Walker used to offer an add-on AIR tube kit. It was basicly a muffler clamp that had a piercing nipple on it, and you hook your existing AIR pipe into it. It was designed to be placed right in front of the cat.
Hope that helps.
Hope that helps.
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
AbandonedBronco has a great exhaust system. You would do well to mimic his.
A glasspack isn't going to be stupid loud on a 4.9L, by the way. These engines are naturally quiet. In order to really make some obnoxious noise, you have to kill the kitties.
A glasspack isn't going to be stupid loud on a 4.9L, by the way. These engines are naturally quiet. In order to really make some obnoxious noise, you have to kill the kitties.
Thread Starter
|
New User
Joined: Apr 2010
Posts: 5
Likes: 0
Guess I'll start trying to contact some manufacturers. The Walker website is not very helpful unless you are looking for a direct fit (read expensive). Any other suggestions on manufacturers with good flowing universal cats?
That guy typed 'piercing nipple'...lol.
Thanks
That guy typed 'piercing nipple'...lol.
Thanks
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
There is a way to determine which cat is better but I don't know how. It has to do with how many honeycombs there are i every square inch. I have ran a high-flow magnaflw cat before and I liked it.
Thread Starter
|
New User
Joined: Apr 2010
Posts: 5
Likes: 0
First, thanks again for the replies. Though I will likely go with the Walker y-pipe, I can't get over how it is put together. With the abrupt junction/intersection from the manifold pipes to the crinkle/crush formed curves, it just looks like it flows terrible. I dug around the Magnaflow site and found this y-pipe and cat #93302.
Product Search Results - MagnaFlow Catalytic Converters by Car Sound
It is a work out art. Two problems, though: 1) 2.25" dia on the main pipe and cat; and 2) kind of pricey (MSRP >$400, common street price ~$240). I have found a source that is offering it for right about $200, which is better but not great.
The problem is the diameter. The Walker is 2.5" I believe, vs. 2.25" for the Magnaflow. But...the Magnaflow looks mandrel bent and smooth as silk.
So, I ask for opinions on the significance of the 2.5" bumpy-jumpy path vs. the 2.25" smooth, smooth, smooth pipe.
Thanks
Product Search Results - MagnaFlow Catalytic Converters by Car Sound
It is a work out art. Two problems, though: 1) 2.25" dia on the main pipe and cat; and 2) kind of pricey (MSRP >$400, common street price ~$240). I have found a source that is offering it for right about $200, which is better but not great.
The problem is the diameter. The Walker is 2.5" I believe, vs. 2.25" for the Magnaflow. But...the Magnaflow looks mandrel bent and smooth as silk.
So, I ask for opinions on the significance of the 2.5" bumpy-jumpy path vs. the 2.25" smooth, smooth, smooth pipe.
Thanks
Trending Topics
Lead Driver
Joined: Mar 2008
Posts: 7,184
Likes: 382
From: Near Los Angeles
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread Starter
|
New User
Joined: Apr 2010
Posts: 5
Likes: 0
Thanks for the bump, F-250 restorer. Any opinions on performance differences? If no one else has tried the Magnaflow pipe or wants to offer an opinion, I don't mind being the guinea pig and reporting back. Unfortunately, my comparison would be the 22 year old stock y-pipe and cat and this will only be one data point. Iplan to use it with a Cherry Bomb glass pack. What do you think for glasspack length: 8", 18", or 22"?
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
18 or 22 inches would be fine. I used a 32 inch glasspack before and didn't like it (too quiet). Also, use Thrush glasspacks. They have a larger inside diameter (2'').
Really it's like this. If you have cats, stay away from baffled mufflers. Glasspacks are your friend. If you DON'T have any cats, I find the 300 makes a nice sound with a good baffled muffler.
You can't go wrong with glasspack style mufflers in any case when it comes to the 300.
Here's a clip of mine.
YouTube - 300 I6, Flowmaster. For the guys on FTE. 2-12-10
Really it's like this. If you have cats, stay away from baffled mufflers. Glasspacks are your friend. If you DON'T have any cats, I find the 300 makes a nice sound with a good baffled muffler.
You can't go wrong with glasspack style mufflers in any case when it comes to the 300.
Here's a clip of mine.
YouTube - 300 I6, Flowmaster. For the guys on FTE. 2-12-10
Elder User
Joined: Nov 2004
Posts: 666
Likes: 5
Try summitracing.com. You can search for a catalytic converter, then choose all sorts of options, like number of inlets, number of outlets, size of inlet, size of outlet, with or without air tube, etc.
I just did a search for a cat with single 2.5" inlet and single 2.5" outlet, and an air tube. Got 18 results to choose from.
Catalytic Converters - SummitRacing.com
I just did a search for a cat with single 2.5" inlet and single 2.5" outlet, and an air tube. Got 18 results to choose from.
Catalytic Converters - SummitRacing.com
Thread
Thread Starter
Forum
Replies
Last Post
1978fordf250
Ford Inline Six, 200, 250, 4.9L / 300
18
Sep 24, 2006 09:55 PM
