hey all just thought id start a thread by seeing what the best ways to increase the hp of the stock fiero motor(s) and keeping it non-turbo/supercharged, non-motor-swapped, and non-N20. in other words: easy horsepower for less! ill go first~~ K&N air filter, truleo intake plenum, and hood vents yes the hood vents can be a lead to increased speed/hp. i dont want to explain so plez just believe me.
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09:16 PM
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Dennis LaGrua Member
Posts: 15989 From: Hillsborough, NJ U.S.A. Registered: May 2000
Add a freeflow exhaust an MSD 6A ignition, wires and supercoil. Then you may have to adjust the fueling in the ECM tables to optimize power and burn a new chip. .
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite. 87GT - 3.4L Turbocharged engine, modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
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10:37 PM
BlackGT Codde Member
Posts: 1107 From: Gallup, New Mexico Registered: Mar 2008
sounds good i just thought of: a power pulley and then a shift kit (automatics) and if youre really into it a more aggressive cam even try an HEI distributor an adjustable fuel pressure reg and better injectors
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11:09 PM
Jan 14th, 2009
tjm4fun Member
Posts: 3781 From: Long Island, NY USA Registered: Feb 2006
In addition to the above: Higher compression pistons. LArger valves with a proper port job on the heads. Cam headers replace intake plenums with a better system. your choice there. truleo, or a dual log setup. balance the motor.
you can get newer better flowing heads. headers. if you have AC. you could remove it if you dont want it AC. a remote waterpump. free up pullie wheels that will free up some power. not alot but every little bit helps you can also lighten your car up to abit. less work for the engine. light weight moving parts help to. remove the Catt.
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02:42 AM
Chris Hodson Member
Posts: 3101 From: Carpentersville Registered: Aug 2006
i still think this is the best one yet anyway.... i thought an hei distributor was one with the coil on the top of the cap? mine and im pretty sure all have separate coils right? unless its modified
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08:21 AM
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Pyrthian Member
Posts: 29569 From: Detroit, MI Registered: Jul 2002
yup - most the above is good stuff. one exception I see tho: the MSD box. I agree with the coil & wires - but the box iteself, just dont see any gains with a N/A motor. I can see helping in a boosted or high compression motor.
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08:48 AM
BlackGT Codde Member
Posts: 1107 From: Gallup, New Mexico Registered: Mar 2008
ah yes the msd box would go with some new pistons at almost 10:1 compression. id have my brother at a performance motorshop custom order me some and he could balance my crank for racing specs
The bestest cheapestest power increase for the V 6 Fiero ,,you guessed it !! remove and port the exhaust and Y pipe,, there is no easy way with the V 6 because it is difficult to get to the parts ,,any exhaust work includes the removal of the bolts THAT break,,but the bigest gain at the lowest price is to port the exhaust manifold ,,the stock manifold is 1/3rd blocked by pipe metal.. PORTING the stock manifold increases power ,increases fuel economy ,makes for a cooler running engine and better efficiency,,engine breaths better aiding other modifications,,this process is a great intro to the Fiero engine and also adds new words to your vocabulary.. It is my opinion that most V6 port jobs are not properly done ,,it is a pain in the wipeing area to do this properly ..VERY time consumming very labor intensive ,,you must remove the weld and stainless steel tubing blocking the flow like the Hoover dam,and take out as much of the material around the corner as you can Porting exhaust, port Y pipe ,install cherry bomb,(flowmaster borla ect) will yield power that does no harm,, actually helps reliability,and only the truelo is proven better on the dyno My mind is made up on the fiero exhaust ,,so do not confuse me with the facts !!
You said cheap and lots of the suggestions are anything but cheap. Porting the exhaust and Y pipe is a huge issue. Getting the exhaust flange bolts out without breaking them is even bigger. There are some threads on this but research it carefully before proceeding.
It is true that porting the heads gives dividends however, if done wrong it can cost and you need the tools. Also, ported heads are a bit of a waste with the stock Fiero intake which is fairly restrictive.
If you have a budget of some sort you really need to look at Trueleo's exhaust and intake. They are bolt-ons for the Fiero and they will add a whole lot of oomph.
Arn
Oh yeah, the MSD box does not make you faster. The high output coil though helps.
[This message has been edited by Arns85GT (edited 01-14-2009).]
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09:57 AM
ClayTonto Member
Posts: 524 From: White, GA, USA Registered: Dec 2008
IMO The best bang for you buck is a set of headers w/ larger y-pipe. Good for about 15-20 horsepower and a much wider torque band, one you can really feel. Most other modifications will require chip burning to notice a difference. WestCoastFiero and above mentioned Truleo are good sources. My last GT had the WCF short tube headers and I had originally planned for more mods and a custom chip, but I was so happy with how much of a difference a free flowing exhaust made that I stopped there.
i still think this is the best one yet anyway.... i thought an hei distributor was one with the coil on the top of the cap? mine and im pretty sure all have separate coils right? unless its modified
The coil can either be attatched, or seperate... it doesn't matter, the point is it does have a coil, instead of points and sets. It was one of the first things I looked into when I got my Fiero... turns out it's already got one.
[This message has been edited by Twilight Fenrir (edited 01-14-2009).]
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10:53 AM
Bremertonfiero Member
Posts: 390 From: Bremerton WA USA Registered: Sep 2008
after reading one post, don't remove your A/C, there is no reason to, if you don't run your pump, you aren't putting any strain on anything. Not to mention, most pumps only require MAYBE 10-12 horses to run, however, that doesn't mean you lose 10 horses by running it, that's only what it takes to spin them. you can spin them freely by hand even when pressurized, it isn't easy, but can be done. Unless you're planning on taking out the ENTIRE A/C system, pump, hoses, pipes, etc, then you may help becuase you're removing the extra weight, but even the pumps only weigh around 10 pounds. Then you have to figure, can you get a shorter belt or do you need a pulley to take up the slack, now you've added a bit more weight back to the car.
[This message has been edited by cujoe_da_man (edited 01-14-2009).]
There is a separate belt for the compressor so you wouldn't need a new serpentine belt.
Something else people do not think about. New motor mounts, trans mounts and dogbone actually put the power that you have to the ground instead of all the play with old mounts. If one mount is bad (including dogbone) and you change it, it is a good idea to at least check the other ones. 1 bad mount can and will affect the others depending on how long it was bad.
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05:46 PM
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joshh44 Member
Posts: 2166 From: Nanaimo, B.C, Canada Registered: Aug 2007
this is what i figured out. most people may not think this but. if one mount is bad. just change them all insted of just the bad one. then you know there all good. i do that with guitar strings. if one breaks. then its time to replace them all. i just dont replace one. thats how i see it anyways. but thats me. im weird haha.
if you can get a really cheap 3.4 engine block. you can just swap everything from the 2.8 over to the 3.4 block and tada. got alittle more power. possibly even use the 3.4 heads.
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07:38 PM
Jan 15th, 2009
BlackGT Codde Member
Posts: 1107 From: Gallup, New Mexico Registered: Mar 2008
pretty cool ideas guys... i guess i was getting off track looking at more expensive stuff too . i was debating my exhaust job wondering if i could unbolt those studs without the studs breaking off in the heads. i decided against it after breaking four intake plenum bolts and an easy out on the upper manifold finally plasma cut them out and have my own custom bolts put in ps: i love plasma cutters! i was wondering if there was a way to really cool off the engine bay? and if so would it help the exhaust to cool off allowing for more dense air and to be shipped along much quicker.
