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Cutout Headers? by eliwab22
Started on: 04-09-2015 02:13 AM
Replies: 12 (261 views)
Last post by: eliwab22 on 04-10-2015 12:56 PM
eliwab22
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Report this Post04-09-2015 02:13 AM Click Here to See the Profile for eliwab22Send a Private Message to eliwab22Edit/Delete MessageReply w/QuoteDirect Link to This Post
I have been trying to figure out how to get more power from my 87 2.5L, does anyone know of a company that make headers that can either dump out the bottom (straight pipe) or run through the muffler? my dad had some on his 68 Camaro back in the day. also, would a special air filter give me any advantage, maybe better fuel economy? also would there be any exhaust the would make it sound a little more throaty/bigger? maybe a glasspack or a cherry bomb?

any help is appreciated!
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Report this Post04-09-2015 02:39 AM Click Here to See the Profile for 87antuzziClick Here to Email 87antuzziSend a Private Message to 87antuzziEdit/Delete MessageReply w/QuoteDirect Link to This Post
The tech 4 is not a performance engine. An air filter will make no noticeable difference, same with putting an exhaust dump in. For the money youll spend on a dump I would to a stage 0 tune up and a cat delete. A 68 Camaro and a Fiero with a duke are night and day apart from each other. If you are dead set on getting some better sound out of the duke a Magnaflow would be better than a glasspack.
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cam-a-lot
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Report this Post04-09-2015 07:47 AM Click Here to See the Profile for cam-a-lotSend a Private Message to cam-a-lotEdit/Delete MessageReply w/QuoteDirect Link to This Post
Deleting a functioning cat won't make any difference either, except to the poor person sitting behind you who has to smell the exhaust. Do a search on the forum and you will see that this question has been answered hundreds of times. The 2.5 is an ancient, 1970's economy car engine and while you can pour a lot of money into trying to give it more performance, my wife will still beat you at the stop light while towing a boat and have 3 kids in the Sienna minivan with the AC on. Save your money, and do a swap one day if you want the car to be faster.

[This message has been edited by cam-a-lot (edited 04-09-2015).]

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tom10122
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Report this Post04-09-2015 08:18 AM Click Here to See the Profile for tom10122Click Here to Email tom10122Send a Private Message to tom10122Edit/Delete MessageReply w/QuoteDirect Link to This Post
You can get a lowish milage 2.8 for dirt cheap. there was one by me for 250..
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fierosound
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Report this Post04-09-2015 11:05 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by eliwab22:

I have been trying to figure out how to get more power from my 87 2.5L,


You should have been here BEFORE you bought that 4-cylinder.

Read through this: http://www.fiero.nl/forum/Forum2/HTML/134665.html

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theogre
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Report this Post04-09-2015 11:50 AM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
Many TBI/TB have problem reaching WOT because cable and/or gas pedal...
See my Cave, Throttle Cable

Exhaust Cutouts are illegal is many states.

Could have exhaust issues because old parts can wear out, engine burning oil or coolant can wreck the cat, etc.

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2.5
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Report this Post04-09-2015 05:09 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by eliwab22:

also would there be any exhaust the would make it sound a little more throaty/bigger? Maybe a glasspack or a cherry bomb?

any help is appreciated!


Welcome to the forum

A larger diameter pipe can make it sound bigger/ deeper. A glasspack can add a throb. Or as was mentioned a Magnaflow. Of course much of the tone of exhaust is subjective to the listener. But in my opinion with the 4 cylinder that is a place to start. Also remember the 4 cylinder doesnt particularly like revving high.
I realize not everyone has the time, experience or money to get an engine swap.

[This message has been edited by 2.5 (edited 04-09-2015).]

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eliwab22
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Report this Post04-09-2015 05:39 PM Click Here to See the Profile for eliwab22Send a Private Message to eliwab22Edit/Delete MessageReply w/QuoteDirect Link to This Post
So if I buy a new muffler I would want to make it a dual exhaust coming out of the muffler, what would be the best way to cut out the rear bumper to accommodate the second exhaust tip? and what size are the exhaust tubes/and the muffler?
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Raydar
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Report this Post04-09-2015 06:29 PM Click Here to See the Profile for RaydarClick Here to Email RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by eliwab22:
...what would be the best way to cut out the rear bumper to accommodate the second exhaust tip? and what size are the exhaust tubes/and the muffler?


Get an 88 rear bumper cover.
The 88 cover is identical, except that it had cutouts on both sides, to accommodate the Formula's dual exhaust. The coupe used the same cover, even though it only had pipes on the left

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eliwab22
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Report this Post04-09-2015 08:21 PM Click Here to See the Profile for eliwab22Send a Private Message to eliwab22Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Raydar:


Get an 88 rear bumper cover.
The 88 cover is identical, except that it had cutouts on both sides, to accommodate the Formula's dual exhaust. The coupe used the same cover, even though it only had pipes on the left



Any ideas where to get one for somewhat cheap?
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Report this Post04-10-2015 01:55 AM Click Here to See the Profile for DKcustomsSend a Private Message to DKcustomsEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by eliwab22:

Any ideas where to get one for somewhat cheap?


I'd sell you mine from my formula cheap, but its got a crack in the corner and shipping would probably be a fortune...
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Report this Post04-10-2015 07:19 AM Click Here to See the Profile for Joseph UpsonClick Here to Email Joseph UpsonSend a Private Message to Joseph UpsonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by eliwab22:
I have been trying to figure out how to get more power from my 87 2.5L, does anyone know of a company that make headers that can either dump out the bottom (straight pipe) or run through the muffler? my dad had some on his 68 Camaro back in the day. also, would a special air filter give me any advantage, maybe better fuel economy? also would there be any exhaust the would make it sound a little more throaty/bigger? maybe a glasspack or a cherry bomb?

any help is appreciated!


A free flowing exhaust on an otherwise stock engine might net you a little in the upper rpm range limit but will kill performance where you will appreciate it most, down low if the exhaust system is also made shorter at the same time as you will lose a good bit of the scavenging effect.

I disconnected the "Y" pipe from the converter on my Z28 to confirm that it was clogged and noticed a considerable seat- of the pants drop in acceleration from a stop.

Make sure the stock system and everything else is in good working order, get yourself an extra cylinder head and see if it's possible to have it shaved enough safely to raise the compression ratio at least .5 points. That will give you a little more power and torque over the entire performance curve as well as an MPG bump. You're stuck otherwise, the duke apparently is already close to its stress handling limits.
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eliwab22
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Report this Post04-10-2015 12:56 PM Click Here to See the Profile for eliwab22Send a Private Message to eliwab22Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by DKcustoms:


I'd sell you mine from my formula cheap, but its got a crack in the corner and shipping would probably be a fortune...


Could you P.M. me a picture And how much you want?
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