The Fiero V6 ignition system is one of its weakest points. Tends to run a bit low on fire above 3500 rpm. Anything done to improve this is going to help alot. A hi-energy coil such as the MSD GM Blaster II or the Accel equivelent are quite inexpensive (< $40). The MSD 6A ignition control will complement this and has been proven to be very beneficial(~$130). Good spark plug wires are essential with the increased spark energy. I suggest Magnecor KV-85's Part #6538 (~$85). If you plan to remove your motor, then the list is nearly endless, so I wont go there. I would like to point out, however, that the clutch is an area that should concern anyone that removes the engine. The stock 2.8 V6 shows its teeth at low rpm, where it exhibits a considerable amount of torque with very little absorbtion by the drivetrain. The little stock clutch tends to slip a bit under these conditions and can result in some performance loss off the line, during shifts, etc.. A heavy duty clutch with kevlar lining addresses this problem adequately. The guys at the Fiero Store have researched this intensely over the last 8 yrs, thats the setup they came up with to solve this problem, and it works well for me. The single best bang for the buck mod would of course be Nitrous Oxide. "NOS systems" makes a kit for MPFI that works great, although it is slightly more expensive than "The Nitrous Works" #13093 kit which is available for less than $450.
nwbackus, this is the kinds of upgrades that i was looking for. where would i buy these parts from? what do you think about changing the computer chip? is it worth doing. how difficult is adding a NOS system? is there any long term damage to the motor?
Most of the equipment (MSD,etc.) that I mention above can be obtained online from performance parts suppliers, they also offer free catalogs :
http://www.jegs.com http://www.summitracing.com
You may find that your local performance shop may have lower prices for these items, so check there too. Magnecor race wires may be somewhat harder to find, they are usually not available locally, but they are available directly from Magnecor: http://www.magnecor.com
The best information I have found for near step-by-step NOS installation on the Fiero V6:
As far as chips go I can only give my own opinion, which is that any "significant" performance gains will be achieved using the benefits of low temp operation with the Hypertech Thermomaster. In most cases however, these chips require the use of premium fuel, which can be a big drawback when operational costs vs. performance benefits are considered. Most applications also require removal of the cat. convertor which may not be possible for street legal operation in your area.
An underdrive pulley may also be something to consider. I have heard that they may adversly effect the charging capabilities of the electical system, but I have not been unable to verify weather this actually occurs on the Fiero V6. I would obtain this item from "The Fiero Store", they include new belts. :-)
whoops.. I gave the wrong link on the NOS installation page, it should be:
http://members.aol.com/shaun41178/
The NOS systems kit (part #5120) is probably the best(The Fiero Store - $549), but "The Nitrous Works" #13093 kit is comparable, and should save you at least $100 over the NOS kit. The #13093 (avail. from Jegs) is a 70 HP shot fixed system, so you will want to consider the current state of you engine in this decision. A 70 HP shot is the maximum that I would advise without some extensive internal modifications and timing curve controls (A worn high milleage motor that pings under acceleration with reg. fuel would not be a good candidate for even a 50 HP shot). If you do intend on using NOS, I would look into the Jacobs Ignition controls. They have systems that include a microswitch to trigger a timing retard controller. The Jacobs ignition systems are quite a bit more expensive than MSD, and comparable as to what they accomplish, but the microswitch trigger would be very advantageous in a NOS setup.
Mike
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06:23 PM
PFF
System Bot
Aug 23rd, 99
Shaun41178 Member
Posts: 1285 From: Whiney McWhinersons Moms Coochie Registered: Jan 99
Actually the Nitrous Works nitrous kit is adjustable. I have talked to a gentleman that installed this same kit on his V6 Fiero alhtough I forget who it was.
He said that the kit was adjustable and it is a wet kit which means that both fuel and nitrous are injected into the engien before the throttle body. The kit is available from Jegs for $439.
The NOS kit is around $500 and is a dry kit which means it only shoots nitrous into the engine before the throtle body and uses a vacuum regulator to raise the fuel pressure in the fuel rail by closing off the factory fuel pressure regulator in effect raising fuel pressure to keep from running lean
I have installed the power pulley from the Fiero store and have had no charging problems. Everything works just as it did before. I don't know how much power it gave but you won't feel a differnce but youwill see a difference in qtr mile times. I did. I went from a 14.8 to a 14.4 with the pulley. How much of this is do to the pulley I don't know but it should be worth at least a .1 in the qtr.
Hmm.. perhaps he was using the Universal EFI #13080 kit(same price as the #13093)? If I may ask, what alternator do you use (amperage) and do you have power accessories, AC?
It just occured to me that this is the 2nd example of a 4 tenths better 1/4 I have seen on this forum from the underdrive pulley installation!! It will undoubtable be my next purchase.
