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Holley Side Scoops...Are they worth the cash? by J-Holland
Started on: 05-07-2014 08:07 AM
Replies: 42 (703 views)
Last post by: hyperv6 on 05-08-2014 06:55 PM
dobey
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Report this Post05-08-2014 01:36 PM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by J-Holland:

So it would appear the consensus is that this scoop doesn't do any good which actually makes sense. I was wondering how moving more air through the throttle body would affect the fuel-air ratio. It would make sense that if you increase the airflow without having the computer adjust the fuel mixture that the engine would then be running lean, so the computer would have to adjust the fuel to bring the fuel-air mixture back to where it should be. That would have to decrease the mileage. Does this make sense?

Jim Holland



It makes sense, but the Fiero ECM isn't that smart, and the Holley scoop doesn't increase the air flow into the engine. There is a bottleneck right after the throttle body. A turbo would overcome the bottleneck, by compressing the air, but a tiny scoop isn't going to do anything.
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Report this Post05-08-2014 03:34 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
My first Fiero with a stock 2.8 had a rubber washer and a flat washer under the wingnut to seal it. I dont know if thats the way they came or someone added it. It was an 86 SE.
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Report this Post05-08-2014 06:55 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by J-Holland:

So it would appear the consensus is that this scoop doesn't do any good which actually makes sense. I was wondering how moving more air through the throttle body would affect the fuel-air ratio. It would make sense that if you increase the airflow without having the computer adjust the fuel mixture that the engine would then be running lean, so the computer would have to adjust the fuel to bring the fuel-air mixture back to where it should be. That would have to decrease the mileage. Does this make sense?

Jim Holland



You are correct it does not work.

As for the computer you are correct few changes would amount to much with out adjustments to the closed loop system. While this system was thought to be more consistent the lack of the Mass Air meter just kills the read on adjustment.

Now the MPG would matter to how much you adjust the system and what changes. Generally more power in most but not all cases takes more fuel and will effect MPG unless you really make some major changes in other areas.
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