I've noticed on my "89" 2.8 Z24. that the air duct in the hood gets waaay small and seams to creat a bit of an air dam at the point the air goes into the pick-up in the front of the hood. I'm changing the hood to a full length cowl scoop. That will open the air way quite a bit. I also plan to split the exaust at the rear cross member, lessening the restriction.
Question, should the computer ( fog. equp) automaticaly adjust to this radical change in flow ? Or could I be going past the pre-set paramiters?
isnt going to do anything youll be fine. and im just saying this so u dont get flamed but try the search button or post in the newbies section.
by the way welcome to the
I tried the serch button, nothing applied. Was hoping someone had increased intake velocity to this degree, and if the 2.8's little brain had a problem with it.
Why would I get flamed for posting here ? Is a newbe someone who just started posting in this forum, or new to wrench turning ?
Quote:
I also plan to split the exaust at the rear cross member, lessening the restriction.
Common misconception. Many FWD GM cars of late 80s-early 90s vintage came with this setup as an appearance option; it will do absolutely nothing for power. All that is accomplished flow-wise is moving the point of restriction further forward. Full 2.25" piping, newer catalytic converter and a single-outlet muffler will do more than simply splitting the exhaust after the rear axle and adding the weight of another "dummy" muffler.
BTW, 1989 = 2nd gen, not 1st.
1989 Z24 Convertible - Dust Covered
2006 tC - Dust Covered, but driven more
Agreed, plus I can speak from experience about the inlet air flow increase. Some years ago I fabbed a FAI (Fresh-air intake. Re: Ram-air!) on my 2.5L TBI S-10 auto, placing the inlet end facing straight forward via a hole in the lower front valance. Added a K&N filter to make the best of it. The results: Got 25MPG while goin' 75-80MPH heading down to Bowling Green, Kentucky for the Buick Nationals! And no codes, either! Search here under Ram-air! for tips.
Go beyond the "bolt-on".
Umm...if you're not getting 25MPG in a 2.5L S10 to begin with...something's wrong.
1989 Z24 Convertible - Dust Covered
2006 tC - Dust Covered, but driven more
But at that speed and holding? With an automatic? Do I need to mention it's a TBI setup? And that it had over 125,000mi on it when I got it (We all know how hard heavy bodies and big loads are on small engines over time). Last time I checked, an '85 4-cyl Fiero weighs much less than a S-10, by at least 1/2ton. I think I'm done explaining here.
Go beyond the "bolt-on".
